APPLICATION OF PRIVATE SITE-SPECIFIC DATA TOREGIONAL EVALUATION OF EARTHQUAKE AND FAULTING

POTENTIAL IN SOUTHERN CALIFORNIA

D.L. Laraar, J.L. Smith, J.W. La Violette, K. Custis, and P.J. Scrivner

Laraar Merifield Geologists, Inc.1318 Second Street, #25

Santa Monica, California 90401

U.S.G.S. CONTRACT NO. 14-08-0001-20513 Supported by the EARTHQUAKE HAZARDS REDUCTION PROGRAM

OPEN-FILE NO. 83-834

U.S. Geological Survey OPEN FILE REPORT

This report was prepared under contract to the U.S. Geological Survey and has not been reviewed for conformity with USGS editorial standards and stratigraphic nomenclature. Opinions and conclusions expressed herein do not necessarily represent those of the USGS. Any use of trade names is for descriptive purposes only and does not imply endorsement by the USGS.

PART I

INTRODUCTION AND SUMMARY

by

D. L. Lamar and J. L. Smith

CONTENTS

PART I: INTRODUCTION AND SUMMARYD. L. Lamar and J. L. Smith

PART II: ANNOTATED BIBLIOGRAPHY OF GEOLOGIC REPORTS PREPARED FOR NUCLEAR POWER PLANT SITES IN SOUTHERN CALIFORNIA J. L. Smith, J. W. La Violette, and K. Custis

PART III: ANNOTATED BIBLIOGRAPHY OF ENGINEERING GEOLOGY REPORTS PREPARED TO SATISFY THE ALQUIST-PRIOLO SPECIAL STUDIES ZONES ACT IN SOUTHERN CALIFORNIA D. L. Lamar and P. J. Scrivner

ill

CONTENTS

INTRODUCTION ........................... 1

DISCUSSION ............................ 2

Nuclear Power Plant Site Studies ................ 2

Diablo Canyon Nuclear Power Plant .............. 2

San Joaquin Nuclear Power Plant Site. ............ 3

Bolsa Island Nuclear Power - Desalting Plant Site ...... 3

San Onofre Nuclear Generating Station ............ 3

Vidal Nuclear Power Plant Site. ............... A

Sundesert Nuclear Power Plant Site. ............. 4

Alquist-Priolo Special Studies Zones Act Reports ........ 5

Kern County Faults. ..................... 5

San Andreas Fault Zone. ................... 6

San Jacinto Fault Zone. ................... 6

Elsinore Fault Zone ..................... 7

San Fernando Area Faults and Raymond Hill Fault ....... 7

Inglewood-Newport Fault Zone. ................ 7

REFERENCES ............................ 8

iii

INTRODUCTION

The electric utility industry has spent more than $50 million for

geologic investigations of six nuclear plant (NP) sites in southern Cali­

fornia. In addition, more than 500 individual investigations of residen­

tial and commercial sites within seven fault zones delineated under the

Alquist-Priolo Special Studies Zone Act (AP) have been conducted in this

part of the state, resulting in cumulative expenditures of millions of

dollars. The two types of studies complement each other because the AP

reports are usually fairly brief, covering limited areas within individual

fault zones, whereas the NP reports, which concern regional geology and

tectonics, are more comprehensive and cover relatively large areas around

individual sites.

Part II of this report, "Annotated Bibliography of Geologic Reports

Prepared for Nuclear Power Plant Sites in Southern California," includes

index maps showing the approximate outline of areas covered by geologic

reports for the six nuclear power plant sites in relation to principal

faults in southern California. Part III, "Annotated Bibliography of Engi­

neering Geology Reports Prepared to Satisfy the Alquist-Priolo Special

Studies Zones Act in Southern California," has detailed strip maps along

individual faults; symbols developed during this project show the location

of individual AP investigations and the ages of faulted and unfaulted earth

materials observed in the trenches. The purpose of these bibliographies is

to make more available to assessments of seismic risk in urban areas of

southern California the large volume of data generated by private industry

on earthquake and surface-faulting potential for these specific sites.

We have not included references to published papers and theses con­

cerning fault hazards, contractor reports of fault investigations for the

U.S.G.S. Earthquake Hazards Reduction Program or reports concerning seismic

safety of dams and facilities other than NP sites.

DISCUSSION

Nuclear Power Plant Site Studies

The number of reports in the bibliography for each NP site varies from

20 to 54; the reports describe the regional and site stratigraphy and struc­

ture, seismic history, foundation conditions and ground-motion characteris­

tics. The NP reports vary greatly in length, scope of subject, degree of

detail and direct relevance to the major faults of interest. Some reports

are comparable to those of the AP bibliography in that they document in

great detail the results of subsurface exploration by trenches and borings,

and they indicate the location, characteristics and minimum age of last

movement on faults. Others report, for example, investigations of large

areas (tens to hundreds of square miles) to develop an understanding of

Pleistocene-Holocene stratigraphy and geomorphology applicable to evaluat­

ing local and regional tectonic activity.

Diablo Canyon Nuclear Power Plant

This oceanfront site in San Luis Obispo County supports a nuclear

plant that is constructed but not yet in operation. Particularly interest­

ing geologic features are the coastal terrace platforms and their overlying

deposits, stratification and deformation in the Monterey Formation, and the

Hosgri fault offshore. Significant contributions of the investigations

include: data from extensive onshore trenching and detailed mapping; data

from comprehensive seismic-reflection profiling offshore; definition of the

Hosgri fault and the variation in its characteristics along strike; discus­

sions of the tectonic relationships and interaction among faults of the San

Andreas system, the Transverse Ranges, and the transition zone between the

Transverse and Coast Ranges; and the source of the 1927 Lompoc earthquake.

San Joaquin Nuclear Power Plant Site

This site was proposed by the Department of Water and Power of the

City of Los Angeles in concert with several other utility companies. Al-

though the site met with the approval of the NRC staff, the applicants

stopped plans for construction after their proposal was rejected by voters

in Kern County. Particularly interesting aspects of this site in the

south-central San Joaquin Valley are the presence at depth of the Greeley

fault beneath the site and the well-layered Plio-Pleistocene sediments

conducive to detailed correlation by borehole-geophysical techniques and to

dating by paleomagnetic methods. Important contributions of the investiga­

tions include (1) extensive seismic-reflection data on faults and their

relationships, (2) determination of the sequence and chronology of soil-

stratigraphic units for dating faults, and (3) the detailed definition of

structures ranging in age from Eocene to Pleistocene.

Bolsa Island Nuclear Power ^ Desalting Plant Site

The construction of an artificial island was proposed by the Metropol­

itan Water District of Southern California in concert with other utility

companies at a site a few miles offshore from Huntington Beach, but the

island was never built. The site lies within or very near the offshore

extension of the Newport-Inglewood zone of folds and faults. Particularly

interesting are the interpretations of drilling and seismic-reflection data

on the locations and upward extent of faults. The investigation of this

site, conducted prior to implementation of the AEC/NRC Seismic and Geologic

Siting Criteria, was not as extensive or comprehensive as those for other

sites studied later.

San Onofre Nuclear Generating Station

A three-unit nuclear power plant has been constructed and licensed to

operate on this oceanfront site by Southern California Edison Company and

San Diego Gas and Electric Company. Geologic features of major interest at

the site are marine and nonmarine terraces and their deposits, the strati­

graphy and structure of the Capistrano Basin, the Cristianitos fault,

conjugate joint-like shears in the San Mateo Formation, and the possible

offshore extension of the Newport-Inglewood zone of folds and faults. The

investigations for this site resulted in (1) the definition and characteri­

zation of the Offshore Zone of Deformation with regard to its earthquake

potential, (2) the development of slip-rate/magnitude relationships along

strike-slip faults for estimating earthquake potential, and (3) a descrip­

tion of the stratigraphy and structure of part of the southern California

continental shelf.

Vidal Nuclear Power Plant Site

This site was investigated by Southern California Edison Company and

proposed for a nuclear plant, but the plant has not been constructed.

Gently sloping alluvial fans and aprons dominate the site vicinity and are

incised to reveal the Pliocene Bouse Formation. Important contributions of

the investigations include (1) age determination and description of the

Bouse Formation and its contact with the underlying Osborne Formation as a

widespread marker horizon, (2) interpretation of the relationships among

several eastern-Mojave faults and the Death Valley fault zone, and (3)

dating of alluvial fan surfaces and several soil and Pleistocene-Holocene

sedimentary units by various methods.

Sundesert Nuclear Power Plant Site

This site along the Colorado River was proposed for a nuclear plant by

San Diego Gas and Electric Company, but plans for construction have been

canceled for economic reasons. Important geologic features at the site

and in the region are the flat-lying sediments of the Bouse Formation,

alluvial fan deposits, and terraces of the Colorado River. Significant

contributions of the investigations include (1) detailed definition of the

stratigraphy and structure of the Bouse Formation, (2) description of the

depositional and geomorphic history of the lower Colorado River, (3) loca-

tion of the 1852 Fort Yuma earthquake, (4) definition of faults in the

Chocolate Mountains southeast of the Salton Trough and their disassociation

with the San Andreas fault system, and (5) description of the Blythe Graben.

Alquist-Priolo Special Studies Zones Act Reports

The AP bibliography has 24 strip maps showing locations of reports

along individual faults. For each report, one or more circles show the ages

of rock units exposed and whether the units are faulted (Part III, Fig. 2).

Lines through circles as extensions of faults indicate that the fault was

exposed in the trench(es). Lines between numbers in the circle at right

angles to the adjacent fault represent depositional contacts. Numbers

inside the circle represent ages of earth materials exposed in the trenches:

1 - Holocene, <10,000 years old (recent alluvium)

2 - upper Pleistocene, 10,000 to 500,000 years old (older alluvium and

alluvial terrace deposits)

3 - lower Pleistocene, 500,000 to 3,000,000 years old

4 - pre-Pleistocene, >3,000,000 years old

This bibliography should be useful for developers, engineers, engi­

neering geologists and land-use planners in identifying potential problem

areas and engineering geology reports applicable to a specific project.

The maps and symbols also give an overview of the relative hazard from

individual faults which verifies or improves knowledge of earthquake risk

and provides a basis for further research. Significant results are summarized

below.

Kern County Faults

Trench logs from 5 AP reports show faults that broke the ground sur­

face during the 1952 Kern County earthquake and parallel faults that also

revealed evidence of Holocene displacement (Part III, Fig. 3). Holocene

displacement was reported in a trench across the Big Pine fault but no

evidence of faulting was reported in two AP reports with trenches in Holo-

cene and late Pleistocene sediments across the Garlock fault (Part III,

Fig. A). No organic material suitable for carbon 1A dating was reported

from any of the trenches.

San Andreas Fault Zone

Trenches across the San Andreas fault and one of its branches, the

Mission Creek fault, revealed abundant evidence of Holocene and late Pleis­

tocene displacement across a zone of subparallel and anastomosing strands

up to 1.7 km wide. Of 30 AP investigations reporting trenches in Holocene

sediments across the principal strands of the San Andreas and Mission Creek

faults, 27 reported evidence of displacement. Displaced sediments which

may contain organic material datable by carbon 1A methods are reported from

the following two sites along the San Andreas fault: City of San Bernar-

dino no. 11 (Part III, Fig. 12), "dark gray to black clay, probably sag

pond materials"; City of San Bernardino no. A5 (Part III, Fig. 13), "Carbon

1A sample indicated in wet organic clay 9 feet below surface adjacent to

fault zone". No data on analysis of sample is given in report.

San Jacinto Fault Zone

Logs of trenches across strands of the San Jacinto fault zone report

Holocene displacement across a zone of subparallel and en echelon faults.

Of AO AP investigations reporting trenches in Holocene sediments across

principal strands of the San Jacinto fault zone, 35 describe displacement.

Other trenches revealed secondary faults parallel to the principal strand

forming a band of faults up to 200 m wide. None of the trench logs of

displaced earth materials across the San Jacinto fault zone report organic

material suitable for carbon 1A dating. Three reports (City of San Bernar­

dino nos. 78, 8A, and 85, Part III, Fig. 17) describe sand boils, blows,

and dikes probably caused by shaking during earthquakes (Sieh, 1978).

Riverside County report no. 9A (Part III, Fig. 19) describes "three dis­

placement events with offsets up to 1 foot."

Elsinore Fault Zone

The Elsinore fault zone consists of subparallel and en echelon faults.

Compared to the San Jacinto and San Andreas faults, trenches across the

Elsinore fault zone found less evidence of Holocene or late Pleistocene

displacement. Of 21 AP investigations reporting trenches in Holocene sedi­

ments across a principal strand of the Elsinore fault zone (Part III, Fig.

26), 10 reported displacement on the Glen Ivy North and Wildomar faults.

No evidence of Holocene displacement has been found on the Willard or Chino

faults. However, Heath ert al_. (1982) report stream offsets and fault

scarps along the Chino fault in the Prado Dam - Corona area, north of the

trenches shown on Fig. 26 (Part III), which suggests Holocene displacement.

Engineering geology reports which describe fault offsets revealed in tren­

ches across strands of the Elsinore fault have been used (Lamar and Swan-

son, 1981, 1982) to successfully guide a search for datable faulting events

and provided the impetus for this study.

San Fernando Area Faults and Raymond Hill Fault

Trench logs from seven AP reports across faults which broke the ground

surface during the 1971 San Fernando earthquake describe displaced Holocene

and late Pleistocene sediments (Part III, Figs. 20 and 21). A log from a

trench across the Raymond Hill fault describes faulting in older alluvium

(Part III, Fig. 20). None of the reports describe organic material suit­

able for carbon 14 dating.

Inglewood-Newport Fault Zone

The Inglewood-Newport fault zone consists of a complex zone of paral­

lel, branching and en echelon faults. Of 13 AP reports describing trenches

in Holocene and upper Pleistocene deposits only one reports evidence of

displacement. This result is suprising in view of seismic activity and

abundant physiographic evidence of faulting along individual strands of the

fault zone (Barrows, 1974).

REFERENCES

Barrows, A. G., 1974, A review of the geology and earthquake history ofthe Newport-Inglewood structural zone, southern California: Calif.Div. Mines and Geol., Spec. Rpt. 114, 115 p.

Heath, E. G., Jensen, D. E., and Lukesh, D. W., 1982, Style and age of deformation on the Chino fault: in Neotectonics in Southern Cali­ fornia, Volume and Guidebook, Geol. Soc. Amer. Cordilleran Section, 78th Annual Meeting, p. 123-134.

Lamar, D. L., and Swanson, S. C., 1981, Study of seismic activity by se­ lective trenching along the Elsinore fault zone, southern California: Lamar-Merifield Technical Report 81-4, Final Technical Report for U.S. Geological Survey Contract 14-08-0001-19144, 50 p.; also U.S. Geologi­ cal Survey Open-File Report 81-882.

Lamar, D. L., and Swanson, S. C., 1982, Ages of displaced strata in trenches across Elsinore fault zone, southern California: presented at Cordil­ leran Section, Geol. Soc. Amer.

Sieh, K. E., 1978, Prehistoric large earthquakes produced by slip on the San Andreas fault at Pallett Creek, California: Jour, of Geophys. Res., v. 83, p. 3907-3939.

PART II

ANNOTATED BIBLIOGRAPHY OF GEOLOGIC REPORTS PREPARED FOR NUCLEAR POWER PLANT SITES IN SOUTHERN CALIFORNIA

by

J. L. Smith, J. W. La Violette, and K. Custis

CONTENTS

INTRODUCTION. ........................... 1

DIABLO CANYON NUCLEAR POWER PLANT ................. 5

SAN JOAQUIN NUCLEAR POWER PLANT SITE. ............... 21

BOLSA ISLAND NUCLEAR POWER - DESALTING PLANT SITE ......... 33

SAN ONOFRE NUCLEAR GENERATING STATION ............... 45

VIDAL NUCLEAR POWER PLANT SITE. .................. 71

SUNDESERT NUCLEAR POWER PLANT SITE. ................ 81

iii'

ILLUSTRATIONS

Fig. 1 Principal faults in southern California, locations of nuclear power plant sites, and outlines of detailed maps ........................

Fig. 2 Areas covered by geologic studies for Diablo Canyon Nuclear Power Plant on San Luis Obispo sheet. ....

Fig. 3 Areas covered by geologic studies for San JoaquinNuclear Power Plant Site on Bakersfield sheet ....... 22

Fig. 4 Areas covered by geologic studies for Bolsa IslandNuclear Power Plant Site on Long Beach sheet. ....... 34

Fig. 5 Areas covered by geologic studies for San Onofre NuclearGenerating Station on Santa Ana sheet ........... 46

Fig. 6 Areas covered by geologic studies for Vidal and Sundesert Nuclear Power Plant Sites on Needles sheet ........................... 72

Fig. 7 Areas covered by geologic studies for Sundesert andVidal Nuclear Power Plant Sites on Salton Sea sheet .... 82

GLOSSARY OF ABBREVIATIONS

ACRS Advisory Committee of Reactor Safeguards

AEC Atomic Energy Commission (also USAEC)

CDMG California Division of Mines and Geology

DBE Design Basis Earthquake

FSAR Final Safety Analysis Report

MEL Maximum Earthquake Limit

NIFZ Newport-Inglewood Fault Zone

NRC Nuclear Regulatory Commission (Also USNRC)

QBE Operational Basis Earthquake

OSFZ Offshore Fault Zone

OZD Offshore Zone of Deformation

PSAR Preliminary Safety Analysis Report

SAFZ San Andreas Fault Zone

SCOFZ South Coast Offshore Fault Zone

SJNP San Joaquin Nuclear Plant

SSE Safe Shutdown Earthquake

SNP Sundesert Nuclear Plant

SONGS San Onofre Nuclear Generating Station

USAEC United States Atomic Energy Commission (also AEC)

USGS United States Geological Survey

USNRC United States Nuclear Regulatory Commission (also NRC)

WEFZ Whittier-Elsinore Fault Zone

vi

INTRODUCTION

Annotated bibliographies of geologic and related reports have been

prepared for the following six nuclear power plant sites (Fig. 1):

Diablo Canyon Nuclear Power Plant

San Joaquin Nuclear Power Plant

Bolsa Island Nuclear Power Plant - Desalting Plant

San Onofre Nuclear Generating Station

Vidal Nuclear Power Plant

Sundesert Nuclear Power Plant

Nuclear plants have actually been constructed on the Diablo Canyon and

San Onofre sites. The other locations remain as proposed sites, but ones

which have been formally proposed to the Nuclear Regulatory Commission

(NRC) and its predecessor agency the Atomic Energy Commission (AEC). Each

site has been extensively investigated and documented with respect to

geology and seismology, the amount of which depends on when the studies

were done and on how far the project proceeded in regulatory review. Also

included are geotechnical studies evaluating soil and foundation conditions

and earthquake-engineering analyses of ground motion from postulated earth­

quakes.

Investigations of nuclear plant sites are governed by rules of the

NRC, "Seismic and Geologic Siting Criteria for Nuclear Power Plants" (10

CFR, Part 100, Appendix A). These rules require comprehensive documenta­

tion of the stratigraphy, structure, geologic history and seismicity within

200 miles of a proposed site with increasing detail approaching the site.

In particular, the absence of capable faults within, or projecting within,

5 miles of a site must be demonstrated by a reasonably thorough investiga­

tion. Also, the source of the potential earthquake judged to produce the

strongest ground motion at the site during the plant's lifetime must be

identified, and the nature of attenuation from source to site and the

characteristics of ground motion at the site must be determined.

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To satisfy NRC and design requirements, the investigations include

geologic mapping, geophysical exploration, drilling and trenching. As in

Alquist-Priolo studies, these investigations yield information on the loca­

tion of faults, their characteristics, and minimum age of last displace­

ment. However, they commonly go further in determining the absolute and

relative ages of stratigraphic units used in dating fault movements and in

describing and interpreting local and regional structural and tectonic

relationships.

The references that follow are grouped by site, ordered by date, and

located approximately on the figure preceding each site section. The list

of references is, no doubt, incomplete despite the authors' attempts to

search several sources including: Public Document Rooms of the NRC,

libraries of the electric utility companies and their consultants, and the

senior author's personal library. Additional documents brought to our

attention by readers would be gratefully received and included, if poss­

ible, in revised editions.

We greatly appreciate and acknowledge the courtesy of ERTEC in Long

Beach for granting us access to the documents in their library and for use

of their copier. Merl Smith of the California Division of Mines and Geol­

ogy (CDMG) kindly provided originals from the CDMG files for producing

Figures 2-7.

Most documents originated by the NRC, or submitted to it for consi­

deration, are placed in the commission's Public Document Room at 1717 H

Street, N.W., Washington, D.C. for public inspection. In addition, docu­

ments related to specific facilities are available for inspection in local

public document rooms in the vicinity of the nuclear facility and in the

regional NRC office at the addresses listed below.

Nuclear Regulatory Commission Region VSuite 2021990 N. California Blvd.Walnut Creek, CA 94596

Documents & Maps Dept.California Polytechnic State University LibrarySan Luis Obispo, CA 93407

Mission Viejo Branch Library 24851 Chrisanta Drive Mission Viejo, CA 92676

References not included in this bibliography, but which contain useful

and interesting information, are the transcripts of public hearings on the

nuclear plants. Transcripts represent the evidentiary record that becomes

the basis for approval by the NRC for an applicant utility to construct,

and later to operate, a nuclear plant at a particular site. Contained in

this record are written and oral direct testimony by witnesses for all

parties to the proceeding the applicant, NRC, intervenors, state and

federal agencies as well as cross examinations, lawyers' arguments, and

written briefs pro and con on the technical and other contentions under

consideration. Although the transcripts are too voluminous and disjointed

for most technical researchers to wade through, the curious and persistent

reader will be rewarded by insights into the opposing geologic interpreta­

tion and judgments by experts for and against the project and by the

variable ability of geologists to defend and sustain their positions.

Information on the location and availability of hearing transcripts can be

obtained from the regional NRC office in Walnut Creek.

DIABLO CANYON NUCLEAR POWER PLANT

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DIABLO CANYON NUCLEAR POWER PLANT SITE (Fig. 2)

66-1 Jahns, R. H., 1966, Geology of the Diablo Canyon Power Plant site: consultants* report to PG&E in Preliminary Safety Analysis Report (67-1), Appendix B, 37 p.

Geologic assessment of the Diablo Canyon Power Plant site addressing the question of feasibility of the site for a nuclear plant in terms of geologic conditions. It is based mainly on a detailed study of bedrock and surficial deposits in natural exposures, and contains a geologic map and structure section. The report concludes that no special problems involving bearing strengths or ground stability are anticipated, and subsurface water should impose no serious difficulties. Further geologic and seismologic studies are recommended.

67-1 Pacific Gas and Electric Co., 1967a, Preliminary Safety Analysis Report, Diablo Canyon Site, 3 volumes.

Preliminary report submitted to the Atomic Energy Commission in sup­ port of the construction permit for Diablo Canyon Unit 1. Geology and seismology data are contained in Volume I, Section 2.5 (Geology) and Sec­ tion 2.6 (Seismology). Geologic reports by Jahns (66-1, 67-2 and 67-3) are contained in Appendix B, and a report on seismology by Benioff and Smith (67-5) is contained in Appendix C. The report concludes that the site is suitable for a nuclear plant. The most recent faulting in the site vici­ nity occurred more than 100,000 years ago. The probability of surface fault rupture can be safely disregarded, and landslides do not threaten the proposed reactor.

67-2 Jahns, R. H., 1967a, Geology of the Diablo Canyon Power Plant site, supplementary report: consultants' report to PG&E in Preli­ minary Safety Analysis Report (67-1), Appendix B, 25 p.

Supplementary report dealing mainly with the results of subsurface geologic exploration at the Unit 1 site, including documentation in the form of photographs, detailed sketches, and geologic sections along four large exploratory trenches. It is concluded that the plant site is both feasible and suitable.

67-3 Jahns, R. H., 1967b, Geology of the Diablo Canyon Power Plant site, supplementary report II: consultants' report to PG&E in Pre­ liminary Safety Analysis Report (67-1), Appendix B, 21 p.

A second supplementary geologic report focused on relationships of structural breaks that were recognized at the Unit 1 site and along the adjacent seacliff near the mouth of Diablo Canyon. The breaks represent two different kinds of minor deformation that probably are related to folding of the strata. This zone of breaks is not a major structural feature, is at least 100,000 years old, and does not correlate reasonably with any break or group of breaks exposed in the trenches at the plant site

67-4 Pacific Gas and Electric Co., 1967b, Third Supplement to Preliminary Safety Analysis Report, Nuclear Plant, Diablo Canyon Site, 285 p.

Supplemental report including additional data on geology and seis­ mology prepared in response to an NRC question regarding faults in the bedrock underlying a portion of the plant foundation and regarding the adequacy of trenching at the site.

67-5 Benioff, H., and Smith, S., 1967, Seismic evaluation of the Diablo Canyon site: Seismological Laboratory, Pasadena, California, in Preliminary Safety Analysis Report (67-1), Appendix C, 9 p.

Historical summary of earthquake activity in the immediate vicinity of the site and adjacent areas, and an estimation of the maximum earthquakes that can be expected during the life of the plant (M 7.25).

Earthquakes on the San Andreas fault (M 8.5), Nacimiento fault and offshore fault systems are discussed.

67-6 Marine Advisers, Inc., 1967a, Supplementary report on tsunami studies in Fourth Supplement to Preliminary Safety Analysis Report, Diablo Canyon Site, 16 p.

Report in response to concern expressed at a meeting of the PG&E and AEC committees "that there has been recent experience in Alaska and in the Mediterranean on nearby earthquakes of about M 7 producing waves 50 feet high. Two features are pointed out that could be suggested as making the Diablo Canyon area different from the areas specified: 1) no embayments that may provide funneling are found at Diablo Canyon; 2) the offshore relief is not as severe at Diablo Canyon. The report concludes that the necessary parameters for creation of a tsunami wave large enough to affect the site are lacking or are not found to be of adequate magnitudes at Diablo Canyon.

67-7 Marine Advisers, Inc., 1967b, Second supplement to report on tsunami potential at Diablo Canyon in Fourth Supplement to Pre­ liminary Safety Analysis Report.

Report containing refraction pattern diagrams for distantly generated tsunamis. The resulting values were significantly less than from locally generated sources, so local systems were used for design.

68-1 John A. Blume & Associates, 1968, Dynamic elastic moduli of foundation earth materials, Diablo Nuclear Reactor Site in PG&E, Final Safety Analysis Report (73-2), Appendix 2.5A, 75 p.

Results of a study of the dynamic site response of materials underlying the reactor site. The purpose of the study was to determine elastic constants of the foundation rocks under anticipated structural loads.

The foundation material at Diablo Canyon site is a stratifed sequence of fine- to very fine-grained, deeply weathered sandstone. The rock is closely fractured, with tightly closed or healed fractures. Values for elastic moduli and Poisson's ratios are recommended for the site.

68-2 Pacific Gas and Electric Co., 1968, Preliminary Safety Analysis Report, Nuclear Unit 2, Diablo Canyon Site, 3 volumes.

Preliminary report submitted to the Atomic Energy Commission in sup­ port of the construction permit for Diablo Canyon Unit 2. Geology and seismology data are contained in Volume I, Section 2.4 (Geology) and Sec­ tion 2.5 (Seismology). Additional investigations were made for Unit 2 including extensive trenching. The geologic reports previously contained in Appendix A of the PSAR for Unit 1 (67-1) are contained in Appendix B of this document. These include Jahns, 1966 (66-1), Jahns, 1967a (67-2), Jahns, 1967b (67-3) and Jahns, 1968 (68-3).

The report concludes that the Diablo Canyon site is geologically suitable for a nuclear plant, including the location selected for Unit 2. The bedrock is fully capable of carrying the intended loads. The most recent faulting in the vicinity of the site occurred more than 100,000 years ago and may well have taken place millions of years ago. The probability of surface fault rupture at the site is so remote that it can be safely disregarded. Landslides do not threaten the proposed Unit 2 reactor.

68-3 Jahns, R.H., 1968, Geology of the Diablo Canyon Power Plant site, supplementary report III, ground conditions at site for plant unit no. 2: consultant's report to PG&E, in Preliminary Safety Analysis Report, Nuclear Unit 2 (68-2), 21 p.

Supplementary report extending the earlier geologic appraisals to the area intended for Unit 2. It is based upon detailed study of new explora­ tory trenches excavated in the terrace area immediately south and southeast of older trenches. The report concludes that the posssibility of fault- induced permanent ground displacement within the subject property during the useful life of the proposed installation is sufficiently remote to be safely disregarded.

69-1 John A. Blume & Associates, 1969, Supplementary report on dynamic elastic moduli of foundation earth materials, Diablo Canyon Unit 2, nuclear reactor site in PG&E, Final Safety Analysis Report, Units 1 & 2 (73-2), Appendix 2.5B, 26 p.

Results of a supplemental geophysical investigation performed at the Unit 2 plant site. The additional work was required because the bedrock underlying Unit 2 was determined to be slightly different from that south of Unit 2. The seismic investigation described in this report confirmed the dynamic elastic moduli values previously recommended for Unit 1 (68-1).

10

71-1 Hoskins, E.G., and Griffiths, J.R., 1971, Hydrocarbon potential of northern and central California offshore, in Am. Assoc. Petroleum Geologists, Memoir 15, p. 212-228.

Geophysical exploration conducted by two geologists with the Shell Oil Company indicate the presence of a 90 mile long fault about 4-1/2 miles offshore from the Diablo Canyon plant site. Although this study was not conducted for the purpose of siting the power plant, it played a signifi­ cant role in establishing the direction of subsequent studies of the site vicinity.

73-1 Harding-Lawson Associates, 1973, Stability evaluation, power plant cut slope, Diablo Canyon site, in PG&E, Final Safety Analysis Report, Units 1 & 2 (73-2), Appendix 2.5C, 202 p.

Results of an evaluation of the existing cut slope east of Units 1 and 2. Test borings and pits were excavated and laboratory tests were per­ formed. The evaluation of stability of the cut slope assumed a horizontal earthquake acceleration of 0.4g. Conventional method of slices was used and checked by the modified Bishop's method. It was concluded that the slope will be stable during the double design earthquake. The computed upper bound of displacement is 10 inches, which would not damage adjacent safety-related structures.

73-2 Pacific Gas and Electric Co., 1973, Final Safety Analysis Report, Units 1 and 2, Diablo Canyon Site, USAEC Docket Nos. 50-275, 50-323.

Report submitted in support of applications to operate two nuclear power plant units at the PG&E Diablo Canyon site. The report has 85 amendments and is contained in 14 volumes. Geology and seismology data are contained primarily in Volume III, Section 2.5. Six appendices to Section 2.5 include reports by John A. Blume and Associates (68-1, 69-1), Harding- Lawson Associates (73-1), Earth Science Associates (74-1), and supplemental studies by PG&E (75-2 to 75-6).

Faults discussed include the San Andreas, Sur-Nacimiento, Rinconada (Nacimiento)-San Marcos-Jolon-San Antonio, San Simeon, Santa Lucia Bank. Additional local tectonic features discussed include West Huasna fault, Edna fault, San Miguelito fault and the east boundary of the offshore Santa Maria basin (Hosgri fault zone). Surficial deposits described include coastal terrace deposits, stream terrace deposits, landslide deposits, slump, creep and slope-wash deposits, and stream-laid deposits. In addi­ tion, midden deposits indicating early habitation by Indians were found at the site.

An outline of the Geology and Seismology section follows:

11

2.5.1 BASIC GEOLOGIC AND SEISMIC DATALocation: Site location and topography are shown on Fig. 2.5-1. Physiography

SiteRegion

Geology and Seismology; Location of earthquake epicenters andregional features of geologic structure are shown on Figs.2.5-2 and 2.5-3. Geologic and tectonic map of the regionsurrounding the site is presented in Fig. 2.5-4. Detailedinformation about the site geology is presented in Figs. 2.5-5through 2.5-13.

Site Engineering PropertiesIntroduction - field and laboratory investigationExploratory trenches and boring locations are shown on Figs.2.5-2, 2.5-8, 2.5-9 and 2.5-10.Summary and correlation of dataDynamic elastic moduli and Poisson's ratioFounding material properties shown in Fig. 2.5-16.Engineering backfillPlan and profile view of excavation and backfill for major plantstructures are shown in Figures 2.5-14 and 2.5-15.Foundation bearing pressure

2.5.2 VIBRATORY GROUND MOTION General Geologic Features Regional Tectonic Setting and Seismicity

Table 2.5-1 - Listing of nature and effects of all significanthistoric earthquakes within 75 miles of the Diablo Canyon site.Table 2.5-1A - Summary of revised epicenters of representativesample of events (19) off the coast of California near San LuisObispo.Table 2.5-2 - Displacement history of faults in the southernCoast Ranges.

Tectonic Features of the Central Coastal RegionSan Andreas faultSur-Nacimiento fault zoneRinconada (Nacimiento)-San Marcos-Jolon-San Antonio fault systemSan Simeon faultSanta Lucia Bank fault

Tectonic features in the vicinity of Diablo CanyonWest Huasna faultEdna fault zoneSan Miguelito fault zoneEast boundary zone of the offshore Santa Maria Basin

Seismicity Ground Accelerations and Response Spectra: Smooth response

acceleration spectra are presented in Figs. 2.5-17 and 2.5-18. Stratigraphy of the San Luis Range and Vicinity

Basement rocksTertiary rocksQuaternary deposits

12

Structure of the San Luis Range and VicinityGeneral featuresSan Luis-Pismo synclineLos Osos Valley antiformEdna and San Miguelito fault zoneAdjacent offshore area and east boundary of the offshoreSanta Maria Basin

LandformsGeneral featuresMarine terrace benches

Geologic History Geology of the Diablo Canyon Power Plant Site. Units 1 & 2

General featuresBedrock units: Data from nearby exploratory oil wells isdiscussed

StructureTectonic structures underlying the region surrounding the siteTectonic structures underlying the site

Surficial DepositsGeologic Relationships at the Unit 1 and 2 Power Plant Site Final Conclusions Regarding Site Geology

2.5.3 SURFACE FAULTING

2.5.4 STABILITY OF SUBSURFACE MATERIALS

2.5.5 SLOPE STABILITY Introduction Field exploration Laboratory tests Strength parameters Subsurface conditions Slope stability analysis Additional studies

APPENDIX 2.5A - Dynamic elastic moduli of foundation earth materials(68-1)

APPENDIX 2.5B - Supplementary report on dynamic moduli of foundationearth materials (69-1)

APPENDIX 2.5C - Stability evaluation, power plant cut slope, DiabloCanyon site (73-1)

APPENDIX 2.5D - Geology of the Southern Coast Ranges and the adjoiningoffshore continental margin of California, with specialreference to the geology in the vicinity of the SanLuis Range and Estero Bay (74-1)

APPENDIX 2.5E - Additional geologic and seismologic studies - 1975(75-2 to 75-6)

APPENDIX 2.5F - Additional geologic and seismologic studies - 1976(NRC questions and answers)

The major conclusions regarding site geology include the following: 1) the reactor site is underlain by well-indurated, firm Monterey

sandstone;

13

2) surficial deposits 3 to 35 feet thick include both marine and non- marine sediments of Pleistocene and Holocene age;

3) no evidence of a major fault has been recognized within or near the coastal area, and no such fault is present within the reactor site;

4) minor surfaces of disturbance, some of which plainly are faults, are present within the bedrock that underlies the power plant site, but none of these breaks offset the interface between bedrock and terrace deposits;

5) no landslide masses or other gross expressions of ground instabil­ ity are present.

74-1 Earth Sciences Associates, 1974, Geology of the southern CoastRanges and the adjoining offshore continental margin of California, with special reference to the geology in the vicinity of the San Luis Range and Estero Bay, in PG&E, Final Safety Analysis Report (73-2), Appendix 2.5D, 112 p.

Investigation conducted to establish a more complete geologic basis for assessing the seismic activity that could affect the plant site. The report describes the San Andreas, Sur-Nacimiento, Rinconada (Nacimiento)-San Marcos-Jolon-San Antonio, East Huasna, West Huasna-Suey, San Simeon and Santa Ynez faults. Major faults in the adjoining offshore continental margin are also discussed.

The report concludes that regional tectonic conditions affecting the southern Coast Ranges derive from the north-south compressive stress- strain system associated with crustal plate transform motion taking place along the San Andreas fault, and from the buoyant uplift of the ranges. The extensional stress-strain regime that exists in the adjacent offshore region may still be affected by extension resulting from a change of the plate motion pole of rotation that occurred some 10 to 12 million years ago; however, it is more likely that it simply results from the continued pulling-away of the offshore region from the rising Coast Ranges.

Seismic-reflection surveys and geologic interpretation of the offshore region between Cape San Martin and Point Arguello are contained in Appen­ dix A. A gravity study of the continental borderland is contained in Appen­ dix B.

74-2 Teknekron, Inc., 1974, Analysis of Offshore Seismicity in theVicinity of the Diablo Canyon Nuclear Power Plant: consultant's report to PG&E, 145 p.

Epicenters in the offshore region near Diablo Canyon cannot be located more accurately than +8 km. In the Santa Lucia Bank region the accuracy drops to +13 km. Offshore structures on both the east and west margin of the Santa Maria Basin are seismically active. Focal mechanisms in the region preclude San Andreas type strike-slip mechanisms and indicate that the Diablo Canyon region is in a transition zone between San Andreas type tectonics to the east and extensional deformation in the Santa Maria Basin to the west.

14

75-1 Engdahl, E.R., 1975, Teleseismic Location of the 1927 Lompoc Earth­ quake: Tera Technical Report, Berkeley, 26 p.

A computer program was used to locate the 1927 earthquake with data reported in the International Seismological Summary and to estimate stan­ dard errors and joint confidence regions for the epicentral coordinates. On the basis of these instrumental locations and associated error analysis, it must be concluded that the location of the 1927 event is not known to better than 25 km at the 95 percent confidence level, and that it probably falls somewhere within the region covering the epicenter distribution shown on a map.

75-2 Pacific Gas and Electric Co., 1975a, The geology of the northern reaches of the Hosgri fault zone and the relationship of the Hosgri fault to the San Simeon fault, in PG&E, Final Safety Analysis Report (73-2), Appendix 2.5E.

Discussion prepared in response to an NRC request to provide addi­ tional documentation on the northern reaches of the Hosgri fault zone. Sixteen sparker seismic-reflection profiles are presented and discussed.

The Hosgri and San Simeon faults are adjacent and subparallel to one another from the latitude of Point Estero north to Ragged Point. As the Hosgri fault zone dies out, vertical displacements along the San Simeon fault increase. This apparent northward transference of strain release from the Hosgri fault zone to the San Simeon fault is completed south of Cape Martin. Several elements of geologic and seismic evidence indicate that there is no significant through-going connection between the Hosgri and San Simeon faults. The Hosgri fault dies out in a series of discon­ tinuous branches and folds north of Point Piedras Blancas.

75-3 Pacific Gas and Electric Co., 1975b, Discussion and arguments for determining the maximum earthquake that can be expected on faults of various ranks within the southern Coast Ranges province of the San Andreas system, in PG&E, Final Safety Analysis Report (73-2), Appendix 2.5E.

Discussion prepared in response to an NRC request for the maximum earthquake that can be expected on faults of various ranks within the San Andreas system. The faults of the region are associated with four contrasting levels of seismic potential. These range from Level I, with which only the San Andreas fault is associated, down to Level IV, a minimum level presumed to exist throughout the Coast Ranges.

Geologic information on total fault length and total slip within a specified time period were used to determine the total seismic-moment characteristics and calculate maximum magnitudes.

15

_______Maximum Earthquake Expected on Faults of Various Ranks____Max. Max.

Fault____________Length(km) Depth(km) Slip(m) Mag.

First Order Branch(e.g., Calaveras, 160-320 15 9 8.2-8.4-

Hayward,San Gregorio)

Second Order(e.g., San Simeon, 80-160 10 +1 6.3-6.5

Nacimiento,Rinconada)

Third Order Less than(e.g., West Huasna, 80 10 +1 6.3

Edna)

For comparison, also shown is the range of magnitudes predicted using curves of fault length versus magnitude.

Fault Rupture Length (km) Magnitude Range

200 7.25-8.5100 6.75-8.2550 6.0-7.7525 5.25-7.25

75-4 Pacific Gas and Electric Co., 1975c, Location and source of the 1927 Lompoc earthquake, in PG&E, Final Safety Analysis Report (73-2), Appendix 2.5E.

Study conducted in response to an NRC request for additional data on the 1927 Lompoc earthquake and consisting of a synthesis and re-analysis of previous work. The Lompoc fault is situated near the point where all seismological indications of the epicentral area of the 1927 earthquake converge or overlap. It has been active during Holocene time, and it is expected to produce predominantly dip-slip movement. It is therefore considered to represent the structural feature most likely to have been the source of the 1927 earthquake.

75-5 Pacific Gas and Electric Co., 1975d, An evaluation of the maximum credible earthquake on the Hosgri fault zone and associated site response spectrum comparisons, in PG&E, Final Safety Analysis Report (73-2), Appendix 2.5E.

Report prepared in response to an NRC question regarding derivation of the peak site ground acceleration caused by the maximum credible earthquake assumed to occur along the segment of the Hosgri fault nearest the site. Evaluation and comparison of the response spectrum associated with this

16

event with the design response spectrum as well as a comparison of various response quantities are also included. A maximum credible earthquake of M 6.25 to 6.5 is derived.

75-6 Pacific Gas and Electric Co., 1975e, The geology of the region of intersection and merging of the offshore Santa Maria basin and Hosgri fault trends with the Transverse Ranges trends, in PG&E, Final Safety Analysis Report (73-2), Appendix 2.5E.

Discussion in response to an NRC request for additional documentation, including seismic-reflection profiles, on the intersection of the Hosgri fault zone with the Transverse Range faults. Thirty-five sparker seismic- reflection profiles are presented and interpreted on six plates.

75-7 Smith, S.W., 1975, Aftershocks of the 1927 Lompoc Earthquake, Tera Technical Report, Berkeley, 19 p.

Based on the Santa Barbara and Pasadena data, the center of aftershock activity appears to have been a distance of 111 and 260 km from these stations, respectively. Although the distance offshore is quite closely fixed at 25 km, there is little or no control on the north-south position. The combined S-P data and isoseismals yield a location of 34.65°N and 120.90°W.

75-8 U.S. Nuclear Regulatory Commission, 1975, Supplement No. 1 to the Safety Evaluation of the Diablo Canyon Nuclear Power Station Units 1 and 2, Division of Reactor Licensing, Washington, D.C., 49 p.

Review of investigations conducted since 1969. Offshore investiga­ tions of the Santa Maria basin by Hoskins and Griffith (71-1), Wagner (1974) and the U.S. Geological Survey. Evaluation of the potential of the Hosgri fault was continuing at the time of this supplement. A review of slope stability analysis concluded that slopes will remain stable during the Safe Shutdown Earthquake.

76-1 U.S. Nuclear Regulatory Commission, 1976a, Supplement No. 4 to the Safety Evaluation of the Diablo Canyon Nuclear Power Station Units 1 and 2, Division of Reactor Licensing, Washington, D.C., 46 p.

Discussion of characteristics of the Hosgri fault and the relationship between the San Simeon fault zone and Transverse Range structures to the Hosgri fault zone. Appendix C to this supplement concludes: the Hosgri fault is capable of a M 7.5 earthquake, the 1927 Lompoc earthquake could have occurred on the Hosgri fault, and a similar M 7.5 earthquake could occur in the future anywhere along the Hosgri fault.

17

76-2 U.S. Nuclear Regulatory Commission, 1976b, Supplement No. 5 to the Safety Evaluation of the Diablo Canyon Nuclear Power Station Units 1 and 2, Division of Reactor Licensing, Washington, B.C., 55 p.

Report recommending a postulated M 7.5 earthquake on the Hosgri fault with an effective horizontal ground acceleration of 0.75g. Supporting data submitted to the NRC by N.M. Newmark are presented in Appendix C of this supplement.

77-1 Ang, A.H.S., and Newmark, N.M., 1977, A Probabilistic SeismicSafety Assessment of the Diablo Canyon Nuclear Power Plant: Report to the NRC, N.M. Newmark Consulting Engineering Services, Urbana, Illinois

Independent analysis of the Design Basis Earthquake and Operating Basis Earthquake (QBE), which concludes that the QBE ground motion with maximum acceleration of 0.2g is acceptable for the Diablo Canyon site.

77-2 Bernreuter, D.L., and Wight, L. H., 1977, Analysis of Diablo Canyon Site Response Spectra, Lawrence Livermore Laboratory, UCRL-52263, 60 p.

Provides confirmation that the ratio of peak velocity to peak acceleration is much smaller at a rock site than at a soil site. The report concludes that the level of ground motion at Diablo Canyon from a major nearby earthquake would have lower amplification factors than those specified in Regulatory Guide 1.60.

77-3 Pacific Gas and Electric Co., 1977, Seismic Evaluation for Postu­ lated 7.5M Hosgri Earthquake, Units 1 and 2, Diablo Canyon Site.

Report arguing that the M 7.5 earthquake postulated by the U.S. Geological Survey, and the resulting ground acceleration at the site (0.75g), are excessive and that an earthquake of M 6.25 to 6.5 is the largest that reasonably can be expected to occur on the Hosgri fault. Nevertheless, the effects of a M 7 earthquake are presented.

78-1 U.S. Nuclear Regulatory Commission, 1978, Supplement No. 7 to the Safety Evaluation of the Diablo Canyon Nuclear Power Station Units 1 and 2, Division of Project Management, Washington, D.C., 147 p.

Defines terminology for earthquake design bases: Design earthquake (0.2g) is the Operating Basis Earthquake as defined in Appendix A to 10 CFR Part 100; Double Design Earthquake (0.4g) is the Safe Shutdown Earthquake. The Hosgri event (0.75g) is the basis approved for the seismic reevalua- tion. Contrary to the applicant's position, the NRC considers this to be the Safe Shutdown Earthquake. Slope stability is also discussed based on the Hosgri event. The applicant's assumptions regarding a nearshore gener­ ated tsunami are considered to be conservative.

18

81-1 Tera Corporation, 1981, Earthquake Emergency Planning at Diablo Canyon: Consultant's report to PG&E, 179 p. and appendices.

Natural seismic hazards of major concern to radiological emergency planning in the study area are ground shaking, landslides, liquefaction, settlement and tsunami. The potential effects of these hazards on trans­ portation and communications are discussed. Specific evaluations rest on the assumption of a M 7.5 event on the Hosgri fault.

19

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73-1 Crosby, J.W., III, 1973, Geophysical logging capabilities and procedures, a status report: in San Joaquin Nuclear Project, Early Site Review Report (SJNP ESRR), Volume II, Appendix 2.5C, 11 p. (74-3)

Summary of downhole geophysical logging capabilities of the Geohy- drology Section of Washington State University. The applications of spon­ taneous potential, single point resistivity, natural gamma, neutron-epi- thermal neutron, neutron gamma, and gamma-gamma logs to stratigraphic correlation are discussed.

73-2 Crosby, J.W., III, Anderson, J.V., and Weber, T.L., 1973, Geophysical logging investigations of the northwest Semitropic Gas Field: in SJNP ESRR, Volume III, Appendix 2.5F, Subappendix 3, p. 2.5F-37 to 2.5F-49. (74-3)

Results of geophysical logging of four borings in the Northwest Semi- tropic Gas Field 5-1/2 miles west of the SJNP site to demonstrate the persistence of diagnostic geophysical horizons throughout the area. The report contains six figures, including correlations and complete-suite profiles, plus Attachment 3A containing the soil classification boring logs.

73-3 Crosby, J.W., III, Siems, B.A., Anderson, J.V., and Weber, T.L., 1973, Interpretation of geophysical logs, Shafter Gas Field: in SJNP ESRR, Volume III, Appendix 2.5F, Subappendix 1, p. 2.5F-8 to 2.5F-26A40. (74-3)

Results of geophysical well-logging in the Shafter Gas Field to eval­ uate stratigraphic relations and structural features for evidence of Recent faulting. The geophysical logs suggest essentially horizontal stratigraphy with no structural displacements of any magnitude. The report contains 15 plates, including correlations and complete-suite profiles, plus an appen­ dix containing the soil classification boring logs.

73-4 Crosby, J.W., III, Siems, B.A., and Weber, T.L., 1973, Inter­ pretation of geophysical logs from San Joaquin Nuclear Project Site, Wasco, California: in SJNP ESRR, Volume II, Appendix 2.5A, 11 p. (74-3).

Interpretation and stratigraphic correlation of geophysical borehole logs for the SJNP site based on composite analysis of gamma-gamma log and natural gamma log suites. Six geophysical zones are defined and correlated to probable stratigraphic horizons. The report concludes that sufficiently well-defined markers are present at the site to permit precise definition of stratigraphic relationships. The report contains 49 figures, including gamma-gamma and natural gamma correlation, and complete-suite logs.

24

73-5 Crosby, J.W., III, Siems, B.A., Lane, G.B., 1973, Preliminary interpretation of geophysical logs near site area, Wasco, California: in SJNP ESRR, Volume III, Appendix 2.5F, Subappendix 4, p. 2.5F-37 to 2.5F-50A10. (74-3)

Results of a geophysical borehole study 4 miles northeast of the SJNP site describing six horizons at the SJNP site that are readily apparent and continuous. The report contains seven figures, including correlation and complete-suite profiles, plus Attachment 4A containing the soil classifica­ tion boring logs.

73-6 Kukla, G.J., Opdyke, N.D., Lowrie, W.S., 1973, Paleomagnetism of San Joaquin Nuclear Project site, drillholes H-14, H-24, and H-35, in SJNP ESRR, Volume II, Appendix 2.5D, 7 p. (74-3)

Paleomagnetic analyses of 34 borehole samples from three borings. The results indicate that the Brunhes-Matuyama paleomagnetic time boundary (700,000 y. B.P.) is most probably 330 feet deep at the site. An average sedimentation rate of 0.4 feet/1000 years is calculated based upon the age of the Corcoran Clay (600,000 years) and its depth of 240 feet. Indepen­ dent correlation of the Brunhes-Matuyama boundary is provided by an ash layer at a depth of 277 feet that correlates with the distant Bishop Tuff. The Bishop Tuff is known to be above the paleomagnetic boundary. The laboratory results are presented in four tables.

74-1 Crosby, J.W., III, Weber, T.L., and Lane, G.B., 1974a, Geophys­ ical borehole studies, southeast site area, San Joaquin Nuclear Project: in SJNP ESRR, Volume III, Appendix 2F, Subappendix 2, p. 2.5F-26B to 2.5F-36. (74-3)

Two-part report on borehole investigations 4 miles southeast of the SJNP site consisting of geophysical logging of 16 borings drilled to depths between 400 and 500 feet to determine evidence for extending displacement along the deeply buried Greeley fault to a shallow depth beneath the SJNP site. The study concluded that continuous flat-lying strata, primarily the distinctive E-clay, overlie the deeply buried Greeley fault and show no indication of structural deformation.

This study also re-examined variations in the elevation of the base of the E-clay in 19 borings and concluded there is no evidence of offset in the geophysical horizons, although gentle northeasterly downwarping of the sediments was noted.

The report contains 26 figures, including correlation and complete- suite profiles, plus soil classification boring logs.

74-2 Crosby, J.W., III, Weber, T.L., Lane, G.B., 1974b, Interpre­ tations of geophysical logs for the Pond fault: in SJNP ESRR, Volume III, Appendix 2.5F, Subappendix 5, p. 2.5F-50 to 2.5F-85W. (74-3)

25

A two-part report describing geophysical borehole investigations near the SJNP site at Peterson and Pond Roads in an area of possible Recent faulting. At the Peterson Road site, the borings were drilled to a depth of about 500 feet and logged. No diagnostic geophysical responses were encountered that could be used for correlation. The environment of sedi­ mentation is postulated to be an alluvial fan.

At the Pond Road site, 11 borings logged to a depth of 500 feet revealed four geophysical horizons. Near-surface deformation greater than 60 feet is postulated to be due to faulting at the Pond Road site.

The report contains 25 figures, correlation and complete-suite pro­ files, plus soil classification boring logs.

74-3 Fugro, Inc., 1974a, San Joaquin Nuclear Project, Early SiteReview Report (SJNP ESRR): Los Angeles Department of Water and Power, 6 volumes.

Preliminary study of the hydrology, geology, and seismology of the SJNP site near Wasco, California. Volume I contains a summary of hydro- logic engineering (Section 2.4), geology and seismology (Section 2.5), and seismic engineering input (Section 3.7.1). The remaining five volumes contain appendices. Appendix 1.7A contains AEC questions and the appli­ cants' responses. Appendices 2.5A to 2.5R are primarily consultants' reports of geologic and seismologic studies used in the site evaluation. Appendices which contain explanations of procedures, raw data, or test results include Appendices 1.7A, 2.5B, C, G, H, I, J, M, and 3.7A.

The faults analyzed for selection of the Safe Shutdown Earthquake (SSE) response spectrum are: (1) San Andreas, (2) White Wolf, (3) Greeley, (4) Semitropic, and (5) Pond-Poso Creek. The 0.35g SSE response spectrum was based on a hypothetical M 7 earthquake on the Pond-Poso Creek fault located 11 miles from the SJNP site. The ESRR concludes that it would be feasible from geologic and seismologic standpoints to construct a nuclear power plant at the SJNP site.

74-4 Fugro, Inc., 1974b, Offsite exploratory programs - Greeleyfault, Northwest Semitropic fault, near-site subsurface investigation, and Pond-Poso Creek fault investigation: in SJNP ESRR, Volume III, Appendix 2.5F, p. 2.5F-1 to 2.5F-85W.(74-3)

Results of an extensive drilling and trenching program designed to detect displacement along fault traces projected toward or underlying the SJNP site. Interpretations of downhole geophysical data are included as five subappendices of Appendix 2.5F.

The results of these investigations are: (1) no evidence of faulting or folding of strata 700,000 years or younger can be found along traces of the Greeley fault in the Shafter Gas Field, 15 miles southeast of the SJNP site; (2) the mid-Pleistocene E-clay has no demonstrable evidence of verti­ cal or horizontal offset across the Greeley fault in the southeastern part of the SJNP site; (3) re-examination of offset on the E-clay, previously reported by the U.S. Bureau of Reclamation, 4 miles southeast of the SJNP site, indicates that the structure is an unfaulted gentle northeasterly- sloping homocline; (4) no evidence for offset on the Northwest Semitropic fault younger than 600,000 to 700,000 years was found in the Northwest

26

Semitropic Gas Field 5-1/2 miles west of the SJNP site; (5) downhole geo­ physical studies 4 miles east of the SJNP site show good correlation among six geophysical horizons identified at the SJNP site (see Crosby, 73-1); (6) the results of airphoto, seismic profile, hydrologic, exploratory trenching, and downhole geophysical investigations of the Pond-Poso Creek fault, 11 miles northeast of the SJNP site, indicate predominantly near- vertical oblique-slip movement on the fault system and no evidence for strike-slip movement. The total cumulative apparent-vertical offset across three faults of the Pond-Poso Creek system is 32 feet, down on the south, with a fourth fault having at least 15 feet of vertical displacement.

74-5 Fugro, Inc., 1974c, San Joaquin Nuclear Project, In situ engin­ eering seismic measurements for dynamic moduli: in SJNP ESRR, Volume IV, Appendix 2.5K, 27 p. (74-3)

Crosshole, downhole, and surface seismic-refraction data indicate the presence of three velocity zones beneath the SJNP site: (1) a 1000 ft/sec zone at the surface; (2) a +_2000 ft/sec zone between a depth of 5 and 60 feet; and (3) a 6000 ft/sec zone below a depth of 160 feet. The report contains eight figures showing the geophysical data-plots and the results.

74-6 Department of Water and Power of the City of Los Angeles, 1974, Feasibility Study Report for San Joaquin Nuclear Project, 3 volumes.

A three-volume report summarizing the feasibility of siting a nuclear generating station near Wasco, California. In Volume I the geology and seismology originally presented in the Early Site Review Report (74-3) is briefly outlined and the critical conclusions are restated. Volume III, the Appendix, contains 19 consultant reports not found in the ESRR. Appen­ dix L contains a letter from W.C. Bryant on groundwater development costs.

75-1 Farr, J.B., Mateker, E.J., Jr., Wu, C., 1975, Interpretation of seismic reflection data for the San Joaquin Nuclear Project: in SJNP ESRR, Volume IIA, Appendix 2.5E, 83 p. (74-3)

Interpretations by Western Geophysical Company of 77 seismic-reflec­ tion profiles (530 line miles) within a 20-mile radius of the SJNP site. Four geophysical horizons were contoured to illustrate structure. Three northwest-trending major fault systems, the Pond-Poso Creek, the Greeley, and the Semitropic Anticline faults, were analyzed for amount and age of movement. The study concludes that: (1) the Pond-Poso Creek System, 11 miles northeast of the site, is a zone of normal faults, down on the southwest. At a depth of 875 to 1,500 feet, a Plio-Pleistocene horizon is displaced, but the displacement dies out 9 miles from the SJNP site. (2) The Greeley fault system consists of three different faults; the shallowest displacement occurs 20 miles southeast of SJNP within Pliocene strata at depths of no less than 8,000 feet. (3) The Semitropic Anticline fault system is southwest of the SJNP site and displaces Miocene strata at depths no shallower than 10,000 feet.

27

The report contains four tables listing fault displacements, 33 plates which are mostly structural sections, correlation sections, contour maps and isopach maps.

75-2 Fugro, Inc., 1975a, San Joaquin Nuclear Project, long period spectral response of the 1952 Kern County earthquake accelerograms: in SJNP ESRR, Volume IV, Appendix 2.5L, 5 p. (74-3)

Results of an analysis of the 1952 Kern County earthquake. In re­ sponse to NRC questions on the long period (0.4 to 2.0 seconds) segments of the design response spectra, this analysis scaled the M 7.7 earthquake upward to a hypothetical M 8.5 event on the San Andreas fault 60 to 80 miles west of the SJNP site. The results indicate that a 0.35g design spectrum conservatively envelops the scaled spectra for all periods of interest.

75-3 Fugro, Inc., 1975b, Interpretation of structure contour and isopach maps, geophysical zone V, site and adjacent areas: in SJNP ESRR, Volume IV, Appendix 2.5N, 19 p. (74-3)

Compilation of data from borings at and adjacent to the SJNP site. The contour and isopach maps for the top and bottom of zone V (the E-clay) were drawn using three methods. The maps are computer-contoured, computer- contoured and hand-smoothed, and hand-contoured. The results of this compilation indicate no evidence of horizontal or vertical faulting. The data suggest that gentle northeast-dipping strata underlie the SJNP site. Nine figures are presented.

75-4 Fugro, Inc., 1975c, San Joaquin Nuclear Project, alternate interpretations of geotechnical data by others: in SJNP ESRR, Volume IV, Appendix 2.50, 46 p. (74-3)

An eight-part report giving arguments for modifying or dismissing conclusions of previous authors about faults and fault activity in the southern San Joaquin Valley near the SJNP site. The topics discussed include: (1) left-lateral faulting through the SJNP site; (2) horizontal slickensides on cores of the Greeley fault; (3) northwest-trending struc­ tures underlying the southern San Joaquin Valley; (4) extensions of the Greeley fault; (5) the 1952 White Wolf earthquake surface fractures and surface markings; (6) faulting in the Rio Bravo Oil Field; and (7) faulting in the Semitropic Oil and Gas Field.

The report includes seven plates, including logs of trenches excavated along lineaments and a map of the 1952 White Wolf earthquake fractures (Plate 2.50-2).

75-5 Fugro, Inc., 1975d, San Joaquin Nuclear Project, photogeologic analysis of the site vicinity: in SJNP ESRR, Volume IV, Appendix 2.5P, 10 p. (74-3)

28

An extensive photolineament study of the area surrounding the SJNP site. Four trenches were excavated across representative photolineaments to determine if lineations were caused by underlying structures. The re­ port concludes that: (1) based on trenching, the northwest- and northeast- trending photolineaments are not related to underlying faults; (2) nearly all lineations are caused by the distributary system of the Poso Creek alluvial fan and by shoreline and dune deposits of Holocene Tulare Lake.

The report contains four figures showing the photolineaments and trench logs.

73-6 Fugro, Inc., 1975e, San Joaquin Nuclear Project, geologic logs of canal excavation, site vicinity: in SJNP ESRR, Volume V, Appendix 2.5Q, 26 p. (74-3)

Documentation of an investigation conducted during the construction of a 10-foot-deep, 20-mile-long irrigation canal a few miles south of the SJNP site. A 12.5-mile segment of the trench was inspected and logged to: (1) ascertain the extent and continuity of Pleistocene and Holocene alluvium near the SJNP site; (2) search for any displacement of soil from deeply buried structures such as the Greeley and Semitropic faults; (3) study the origin of the numerous photolineaments that cross the canal; and (4) date the sediments.

The report concludes that: (1) the continuity of soils was demon­ strated; (2) no offsets or disruptions of soil horizons were present across the upward projections of the Greeley and Semitropic faults; (3) photo- lineaments are caused by contrasting soil types associated with buried stream channels and are nontectonic in origin; (4) no evidence of near- surface faulting was found; and (5) an age date of a paleosol exposed in the canal at a depth of 10 feet is to be determined.

The report contains 13 plates presenting logs of the canal slopes.

77-1 Fugro, Inc., 1977a, San Joaquin Nuclear Project, Additionalstudies demonstrating the conservatism in the Safe Shutdown Earthquake for the Pond-Poso Creek fault: in SJNP ESRR, Volume V, Appendix 2.5R, 181 p. (74-3)

A four-part report on the degree of conservatism of the design spectra for the Safe Shutdown Earthquake (SSE) postulating an M 7 earthquake on the Pond-Poso Creek fault with a hypocentral distance of 11 miles from the SJNP site.

Four studies by consultants demonstrate the conservatism of 0.35g design response spectra by: (1) scaling ten selected response spectra for the SJNP site conditions and showing that the 0.35g SSE describes greater shaking; (2) performing a regression analysis of a deep-alluvium data-set and showing the 0.35g SSE exceeds a mean-plus-one-standard-deviation level of response (Fugro, 77-2); scaling the response spectra earthquake records using spectral-intensity attenuation-relationships and showing the 0.35g SSE to be greater (77-4); and (4) showing by statistical analysis that the 0.35g SSE design response spectra represents a level of shaking that will occur once in one million to ten million years (77-5).

29

77-2 Fugro, Inc., 1977b, Applicants' procedure applied to the Pond-Poso Creek fault: in SJNP ESRR, Volume V, Appendix 2.5R, Subappendix 1, p. 2.5R-9 to 2.5R-41. (74-3)

Concise description of the Applicant's procedures and methods for determining the Safe Shutdown Earthquake (SSE) for SJNP based on a M 7 earthquake on the Pond-Poso Creek fault 11 miles away. The original four representative earthquakes used in the analysis are supplemented by six additional earthquakes. All earthquake response spectra have been scaled to the SSE magnitude/distance conditions for SJNP. The report concludes that the six additional response spectra add credibility to the 0.35g Regulatory Guide 160 design spectra previously presented in Section 2.5.2.10 of the SJNP ESRR.

The report contains 17 figures, mostly of scaled response spectra.

77-3 Fugro, Inc., 1977c, Response spectra for the Pond-Poso Creek fault SSE based on regression analyses of spectral ordinates: in SJNP ESRR, Volume V, Appendix 2.5R, Subappendix 2, p. 2.5R-42 to 2.5R-67. (74-3)

Summary of methods and results of analyses by the USGS and the applicants on recorded earthquake response spectra scaled to the 0.35g Regulatory Guide 160 Safe Shutdown Earthquake (0.35g SSE). Regression analyses were performed for a large data-set (23 to 96 records) which were classified as representing rock, soil, or deep-alluvium conditions. The mean-plus-one-standard-deviation curve was determined for each foundation condition. The results of this study indicate that the 0.35g SSE exceeds the curve for the "USGS data-set" and the deep-alluvium data-set. The deep-alluvium spectra best represent the SJNP site conditions.

The report contains six figures, mostly response spectra.

77-4 Keith, Feibusch and Associates, Engineers, 1977a, Response spec­ tra for the Pond-Poso Creek fault SSE based upon a regression analysis of spectral intensity: in SJNP ESRR, Volume V, Appendix 2.5R, Subappendix 3, p. 2.5R-70 to 2.5R-109. (74-3)

Evaluation of the 0.35g Regulatory Guide 160 Safe Shutdown Earthquake (0.35g SSE) by using spectral-intensity values for determining the appro­ priate scaling factors of a selected number of recorded earthquakes. The 0.35g SSE is based on an M 7 earthquake on the Pond-Poso Creek fault 11 miles from the SJNP site. Selected response spectra of recorded ground motions were analyzed to determine the relationship among spectral inten­ sity, magnitude, and source distance. The analyses were performed for three different soil categories: rock, soil and deep alluvium. Deep alluvium was found to be most representative of the SJNP site. The report concludes that the 0.35g SSE response spectra are conservative.

The report contains eight plates.

30

77-5 Keith, Feibusch and Associates, Engineers, 1977b, Probabilistic evaluation of the design response spectrum for the Pond-Poso Creek fault SSE: in SJNP ESRR, Volume V, Appendix 2.5R, Subappendix 4, p. 2.5R-110 to 2.5R-181. (74-3)

A probability model for the Pond-Poso Creek fault based on an analytical procedure developed by Cornell (1968). The study discusses determination of an earthquake magnitude-recurrence relationship using fault-displacement history, magnitude vs. fault displacement, and magnitude vs. rupture length data from the Pond-Poso Creek fault. The study also includes discussions of: (1) statistical implications of the spatial distribution of earthquakes along the fault; (2) attenuation of ground motion; (3) return period of ground motion amplitudes; and (4) sensitivity of the study's probabilistic results to variations in the parameters. This report concludes that the 0.35g Safe Shutdown Earthquake design response spectra are representative of a level of shaking that will occur once in one million to ten million years.

31

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65-1 Bechtel Corp., December 1965, Engineering and Economic Feasibility Study, Phase I, II, and III, for a Combined Nuclear Power and Desalting Plant, Volumes I, II, and III.

Feasibility study of three potential plant sites at Irvine Ranch, Dana Point, and offshore Sunset Beach, California. Geologic and seismologic data are contained in Chapter 7 of Volume I (Nuclear Site Safety Analysis); Chapter 3 of Volume II (Site Analysis); Chapter 4 of Volume III (Site Analysis); and Appendices of Volumes I and II.

Volume I, phases I and II, has a brief summary of the geology and seismology of Irvine Ranch, Dana Point, and Bolsa Island sites. Appendix B contains letters on seismology by G.W. Housner (65-5) and H. Benioff (65-2).

Volume II, phase III, has a geologic analysis of Bolsa Island and Pelican Point (Irvine Ranch). Sparker surveys for Bolsa Island (EG&G, 65-4) indicate that below Bolsa Island two deep faults are covered by 900 feet of undisturbed sediments. Recommended seismic design criteria are 0.33g ground acceleration for Bolsa Island and 0.25g for Pelican Point. Appendix A contains geologic and seismologic reports by R.H. Jahns (65-6) and H.H. Neel (65-7) discussing the Irvine Ranch, Moro Canyon, Pelican Point, and Bolsa Island sites.

Volume III is a summary report on the Bolsa Island and Pelican Point sites.

65-2 Benioff, H., April 30, 1965, Seismic Report: in Bechtel Corp., December 1965, Engineering and Economic Feasibility Study, Volume I, Phase I and II, Appendix B-4, 3 p.

Letter describing the maximum intensity of shaking, tsunami hazard, and potential for liquefaction and faulting beneath the Bolsa Island site. The maximum intensity of shaking for the seismic period range up to 1.5 seconds would come from a M 6.0 earthquake on the Newport-Inglewood fault; for longer periods the maximum intensity would come from a M 8.0 earthquake on the San Andreas fault 50 miles away.

65-3 Dames and Moore, November 8, 1965, Preliminary soils and foun­ dation investigation at Bolsa Island: in Bechtel Corp., 1965, Engineering and Economic Feasibility Study, Volume II, Phase III, Appendix F, 35 p. and appendices. (65-1)

Soils and foundation engineering study of the ocean floor at the site and a stability analysis of the proposed island. Appendix A is a discus­ sion of the field program, including a discussion of the scope and results of the EG&G (65-4) Sonoprobe survey. Plates A-7A, A-7B, and A-8 present the sparker-boomer survey lines and partial records from the EG&G study.

36

65-4 Edgerton, Germeshausen, and Grier, Inc. (EG&G), September 1965, Spark Array and High-Resolution Boomer Surveys for Bolsa Island.

Seismic reflection study of the ocean floor at the proposed Bolsa Island site. This study indicates that the Huntington Beach "A" fault extends up to the ocean floor and may produce a topographic scarp. No complete copy of this report was located, but Bechtel Corp. reportedly has one in their San Francisco office. Summaries of this report are included in studies by Dames and Moore (65-3), Neel (65-7), and Bechtel Corp. (65- 1).

65-5 Housner, G.W., May 10, 1965, Report to the Bechtel Corporation on seismic design criteria for a nuclear-fired desalting plant: in Bechtel Corp., December 1965, Engineering Feasibility Study, Volume I, Phase I and II, Appendix B-3, 6 p. (65-1)

A report recommending seismic design criteria for the Irvine Ranch, Dana Point, and Artificial Island sites. For the Irvine Ranch and Dana Point sites the response spectrum should be based on a M 8.0 earthquake on the San Andreas fault and should have a maximum ground acceleration of 0.25g. A response spectrum with a maximum ground acceleration of 0.33g from a M 7.0 earthquake on the Newport-Inglewood fault zone is recommended for the Bolsa Island site.

65-6 Jahns, R.H., November 17, 1965, Geologic and seismic factors pertinent to Irvine Ranch and Artificial Island sites: in Bechtel Corp., December 1965, Engineering and Economic Feasibility Study, Volume II, Phase III, Appendix A, 6 p. (65-1)

Brief description of the geology for the Pelican Point (Irvine Ranch) and Bolsa Island sites. The Newport-Inglewood fault zone is the most likely fault to affect the Bolsa Island site. An earthquake of no greater than M 7.0 and surface displacements not exceeding 3 feet can be expected. Ground displacement within or near the proposed site is unlikely. The effect of seismic shaking for Bolsa Island can be considered applicable to Pelican Point. The report concludes that there is no evidence for faults beneath the Pelican Point site, but breaks may exist beneath the terrace cover.

65-7 Neel, H.H., November 8, 1965, Geologic investigation of theMoro Canyon site, Pelican Point site, and the Sunset Beach-Huntington Beach area: in Bechtel Corp., December 1965, Engineering and Economic Feasibility Study, Volume II, Phase III, Appendix A, 17 p. (65-1)

Three-part report summarizing the geologic investigation of three potential sites for a nuclear-fired desalting plant. A detailed Bolsa Island report concludes that only one fault of the Newport-Inglewood fault zone, the Huntington Beach "A" fault, shows any indication of Recent move­ ment. The proposed island site will be at least 1 mile away from this

37

fault. A geologic map of the Bolsa Island site, scale 1 inch * 2,000 feet, is included.

The Pelican Point (Irvine Ranch) report concludes that the nearest major fault is part of the Pelican Hill fault system, which has no known Recent movement. A geologic map at a scale of 1 inch « 1,500 feet is included.

The Moro Canyon report concludes that the nearest fault is 1,000 feet east of the site and shows no evidence of Recent movement.

67-1 Alpine Geophysical Associates, Inc., 1967, Sparker arcer con­ tinuous seismic profiling survey: in Bechtel Corp., 1967, Detailed Investigation of the Bolsa Island Site, Appendix A, 28 p. (67-2)

Report on a continuous seismic-reflection survey for the Bolsa Island Nuclear Plant Site. This report does not repeat data from earlier prelimi­ nary reports (EG&G, 65-4; Bechtel, 65-1), but does add additional data and clarification of the previous results. The preliminary reports concluded that: (1) the upper 40 feet of sediments are horizontal or very gently sloping; (2) a good reflector, designated Horizon "A," occurs at a depth of about 200 feet and is traceable over the entire study area; (3) a second reflector, designated Horizon "B," about 50 to 80 feet below and parallel to Horizon "A," can be traced over most of the study area; (4) the geologic substructure of the upper sediments is that of a gentle, approximately west-northwest anticline; (5) no evidence for faulting could be found in Horizon "A" or "B"; and (6) sample profiles across the Palos Verdes fault demonstrate the ability of this system to recognize faults.

Data collected for this study include: (1) profiles across the Palos Verdes fault and the Huntington Harbor (Inglewood) fault, and profiles through the Bolsa Island site; (2) a contour map of Horizon "A," and (3) discussion of the geophysical and geologic features of the proposed island site. The report concludes there is no evidence of faulting within a 2- square mile area centered on the proposed site. However, the report does not rule out the possible existence of a strike-slip fault having no appar­ ent vertical offset. There is also a review and rebuttal of previous data (Geophysical Services, Inc., 67-6) that had indicated faulting beneath Bolsa Island.

67-2 Bechtel Corp., 1967, Detailed Investigation of the Bolsa Island Site, 146 p.

Investigation to determine: (1) site geology; (2) seismicity; (3) geologic suitability; (4) engineering properties of the site's ocean-bottom soils; (5) engineering properties of the island fill material; and (6) design criteria recommendations. The scope included: (1) research of published and unpublished data from oil companies and various governmental agencies; (2) seismic-reflection profiling of the site area; (3) site drilling, sampling, and downhole geophysical logging to determine geologic structure and obtain soil samples; (4) laboratory testing of site and borrow-site soils; and (5) foundation and seismic engineering analyses.

The geology and seismicity section of the report discusses the fol­ lowing results of the exploration program: (1) two geophysical horizons,

38

II A tl'A" and "B," are mappable across the site, with a profile resolution such that vertical offsets of 2 feet or greater could be identified, but no offsets were found beneath the site; (2) the drill hole data confirm that Horizon "A" is a lithologic unit; (3) microfossil analyses indicate the top of Horizon "A" is the top of the lower Pleistocene (500,000 y. B.P.); and (4) Carbon-14 analysis indicates that the Pleistocene/Recent boundary at the site is about 60 feet below sea level.

Also discussed on both a regional and site-specific scale are geomor- phology, stratigraphy, structure, subsidence, and seismicity. The greatest source of local seismicity for the plant is the Newport-Inglewood fault zone 1 mile east of the site and the Palos Verdes fault 7 miles to the west. The San Andreas or San Jacinto faults pose the greatest regional seismic risk.

The report recommends that the Class I structures, those essential to the safe operation of the plant, be designed based on a response spectrum normalized to O.SOg acceleration, Operating Basis Earthquake. This recom­ mendation is based on the assumption that a M 6.5 earthquake on the Newport-Inglewood fault zone or a M 8.0 earthquake on the more distant San Andreas or San Jacinto fault zones will occur within the life of the plant. The Safe Shutdown Earthquake response spectrum should be normalized to 0.45g acceleration, corresponding to a local M 7.5 or a distant M 8.5 event. Subsidence from various sources is estimated at 2.75 feet over the 50-year life expectancy of the plant. Sources of subsidence include: (1) tectonic downwarping at 0.02 feet per year; (2) ground water withdrawal, (no estimated amount); and (3) oil and gas withdrawal, 1.75 feet in 50 years.

67-3 Benioff, H., Housner, G.W., and Jahns, R.H., 1967, Geologic and seismic factors pertinent to design criteria: in Bechtel Corp., 1967, Detailed Investigation of the Bolsa Island Site, Appendix D, 6 p. (67-2)

Summary of the geology and seismology of the proposed Bolsa Island Nuclear Power/Desalting Plant Site. The geologic structure beneath the island site and nearby Newport-Inglewood fault zone are briefly reviewed. The possibility of future ground displacement within the site area was considered from four sources: (1) upward propagation of displacement along a fault beneath the site; (2) lurching of the ground during a major earth­ quake; (3) ground subsidence following subsurface-fluid withdrawal; and (4) subsidence due to compaction of unconsolidated sediments. The report concludes there is little possibility of a surface rupture beneath the proposed site and recommends a M 6.5 earthquake on the Newport-Inglewood fault zone or a M 8.0 earthquake on the San Andreas or San Jacinto faults be used for seismic design.

67-4 Dames and Moore, 1967, Results of laboratory tests, site inves­ tigation and technical services: in Bechtel Corp., 1967, Detailed Investigation of the Bolsa Island Site, Appendix G, 6 p. (67-2)

Results of laboratory tests performed on numerous samples taken from seven drill holes at the proposed Bolsa Island site. Tables and figures

39

presenting moisture content and dry density, consolidation test data, specific gravity, and grain-size gradation curves are included.

67-5 Dobrin, M.B., 1967, Interpretation of Seismic Data from Vicinity of the Bolsa Island Site, 9 p.

Review of five offshore seismic-reflection studies performed for the Bolsa Island site. The report concludes that well-defined evidence exists for faulting in the offshore area surrounding the site, but that no evi­ dence exists for faulting with vertical offsets greater than 5 to 10 feet beneath the site at depths shallower than 500 feet.

67-6 Geophysical Services, Inc., 1967, Reconnaissance structural interpretation - offshore Sunset Beach: in Bechtel Corp., 1967, Detailed Investigation of the Bolsa Island Site, Appendix C, 5 p. (67-2)

Structural map of a shallow geophysical horizon, thought to be the top of the lower Pico Formation, which was interpreted for the area around the proposed Bolsa Island site. The data used for the study consisted of 15 seismic-reflection profiles (migrated depth sections), nine SUE reflection- time record sections, and dip-log data from four adjacent oil wells. Be­ cause the quality of the seismic data was rated as poor, the resultant interpretation was rated fair to poor. The structural interpretation indicates a possibility of five faults near the Bolsa Island site.

67-7 Hughes, A.W., 1967, Report on seven core-residue concentrations:in Bechtel Corp., 1967, Detailed Investigation of the Bolsa IslandSite, Appendix E, 1 p. (67-2)

Age and microfossil identification from core-residue concentrations taken between the 75- to 418-foot depths in Bechtel drill hole #101 at Bolsa Island. The results indicate that: (1) the 75- to 90-foot interval consists of Recent sands; (2) the 116- to 182-foot interval is Palos Verdes-upper Pleistocene-upper Hallian; and (3) the 233- to 418-foot inter­ val is upper Pico-lower Pleistocene-lower Hallian.

67-8 Idriss, I.M., 1967, Methods for evaluating the seismic response of Bolsa Island: in Bechtel Corp., 1967, Detailed Investigation of the Bolsa Island Site, Appendix I, 6 p. (67-2)

Brief summary of the methods used in a finite element analysis of the proposed Bolsa Island site. The analysis evaluated the liquefaction poten­ tial and slope stability for the site using seismic -motions recommended by Bechtel and the Site Advisory Committee (Benioff, Housner and Jahns).

40

67-9 Law, J., 1967, An estimate of future horizontal movement, vertical movement and surface strain: in Bechtel Corp., 1967, Detailed Inves­ tigation of the Bolsa Island Site, Appendix J, 14 p. (67-2)

Geology of the proposed Bolsa Island site, amounts of subsidence to date, and estimates of the future ultimate subsidence with accompanying ultimate horizontal and differential horizontal movement (strain). Dis­ cusses the possibility for Raleigh-wave earth tremors and the development of fissures or scarps due to subsidence. The appendices include dis­ cussions of the effects of the Wilmington and Goose Creek Oil Field subsi­ dence. Contains 14 figures which show the existing and estimated effects of subsidence.

67-10 Linehan, D., 1967, Review of geophysical explorations: inBechtel Corp., 1967, Detailed Investigation of the Bolsa Island Site, Appendix B, 3 p. (67-2)

Summary of results of the Alpine Geophysical Associates (67-1) seismic profile studies of the Bolsa Island site. The author concludes that, under optimum conditions, vertical displacements of 2 feet or greater can be identified by the sparker studies. Horizontal displacement on plunging arch-like structures, such as under Bolsa Island, should give apparent vertical displacement within a few hundred feet of purely horizontal move­ ment. The author concludes from the sparker-arcer surveys that there is no evidence for faults underlying the Bolsa Island site.

67-11 Neel, H.H., 1967, Review of Bolsa Island Site geologic work: in Bechtel Corp., 1967, Investigation of the Bolsa Island Site, Appendix F, 6 p. (67-2)

Letter describing the three-phase history of site selection and the accuracy of supplemental work done by various consultants to determine whether faults exist beneath or near the proposed site. It is concluded that no discernible active faulting has taken place since the Pleistocene in or immediately near the Bolsa Island site and that no other geologic conditions exist which will adversely affect the site. A two-page supple­ mental letter from R.F. Herron (July 28, 1967) is also included for docu­ mentation. The Herron letter discusses the results and the accuracy of a seismic profile study undertaken for Bolsa Island under his supervision by EG&G Consultants (67-4).

67-12 United States Department of the Interior, October 1967, Geologic- seismological factors pertaining to the proposed construction of a nuclear power - desalting plant at Bolsa Island, California, 62 p.

Department of the Interior Advisory Committee report summarizing a geologic review of the proposed Bolsa Island Nuclear Power and Desalting Plant. The data base for this report is primarily that collected by Bech­ tel Corp.(67-2). This report discusses in detail the Newport-Inglewood fault zone (1 mile east of the site), structures beneath the site, the Safe

41

Shutdown Earthquake, local and regional subsidence, island foundation con­ ditions, and the geo-seismic design criteria. The committee recommended that M8.0 and 8.5 earthquakes occurring on the Newport-Inglewood and San Andreas faults, respectively, be considered for the Safe Shutdown Earth­ quake. Appendix A is a letter from M.B. Dobrin (67-5) to the committee discussing the interpretation of seismic data.

67-13 Woodward-Clyde-Sherard and Associates, 1967, Results of labora­ tory tests on soils samples: in Bechtel Corp., 1967, Detailed Investigation of the Bolsa Island Site, Appendix H, 35 p. (67-2)

Results of laboratory tests performed on undisturbed and disturbed soil samples taken from drill holes at the proposed Bolsa Island site and on fill material from borrow areas. The testing included soil classifica­ tion, relative density, consolidation, undrained-triaxial tests, and dynam­ ic triaxial-compression tests. Contains seven tables and 102 figures.

67-14 Edgerton, Germeshausen, and Grier, Inc. (EG&G), July 28, 1967, Sparker and high-resolution boomer surveys for Bolsa Island, Phase III.

Results of a second seismic-reflection study of the ocean floor at the proposed Bolsa Island site. This study found no faults closer to the seafloor than 400 feet except possibly the Huntington "A" fault. Because of poor data-resolution, there is some question whether the Huntington "A" fault reaches the seafloor. No copies of this report were located, but detailed summaries of the study are given in the reports by Neel (67-11) and Herron (July 28, 1967), both of which are found in Appendix F of Bechtel f s (67-2) detailed report.

67-15 Department of Water and Power, City of Los Angeles, August1967, Preliminary safety analysis report, Bolsa Island Nuclear Power and Desalting Plant.

Preliminary report submitted in conjunction with Southern California Edison and San Diego Gas and Electric Co. to support the application for construction permit for the Bolsa Island Nuclear Power and Desalting Plant. The geologic and seismologic data are contained in part B of Volume I, Section 2 (Site and Environment) with subsections 2.3 (Geology and Seismi- city) and 2.8 (Criteria).

Faults considered in the seismic design include the San Andreas and San Jacinto about 50 miles away, the Newport-Inglewood fault zone 1 mile to the northeast, and those of the Palos Verdes zone 7 miles to the southwest. The NIFZ has offset upper Pleistocene strata but not Recent deposits. Geophysical and site drilling studies indicate no "young," near-surface, en echelon or branching faults either immediately surrounding or under the proposed island site. The seismic design criteria considered a M 6.5 earthquake originating in the site vicinity and a M 8.0 earthquake on the San Andreas or San Jacinto to be highly probable within the next fifty years.

Figure 2.3-5 is a geologic map with accompanying eight cross-sections.

42

Smoothed response spectra were developed and normalized to O.SOg ground acceleration for the Operating Basis Earthquake (QBE) and 0.45g for the Safe Shutdown Earthquake (SSE).

43

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SAN ONOFRE NUCLEAR GENERATING STATION (Fig. 5)

70-1 Converse, Davis and Associates, 1970, Geologic report on the probability of ground displacement of faults in the vicinity of the San Onofre Nuclear Power Plant Site, Units 2 & 3, San Diego, California: in the PSAR for SONGS, Appendix 2A, 26 p. (70-4)

Preliminary fault evaluation for Units 2 and 3 at SONGS, drawn on existing data from the SONGS Unit 1 studies and other published and un­ published data supplemented by detailed geologic mapping and logging of excavations across the Cristianitos fault in: Piano Trabuco, the San Onofre Bluffs, and the seacliffs between SONGS and the Cristianitos fault. A detailed geologic map of the Cristianitos fault from San Mateo Canyon to the shoreline is included.

The report concludes that no faults could be found in the foundation rocks for the SONGS Units 2 and 3 site (San Mateo Formation) nor projected into the site, and that the Cristianitos fault has not displaced the ground surface for at least 80,000 years with no known historic seismicity.

70-2 Dames and Moore, Inc., 1970, Seismic and foundation studies for proposed Units 2 & 3, SONGS: in the PSAR for SONGS, Appendix 2B, 68 p. (70-4)

Foundation engineering and seismicity report for Units 2 and 3 of SONGS, including soil classification and analysis, foundation design cri­ teria, and stability analyses. The seismicity section includes: (1) discussion of site dynamic-foundation characteristics; (2) table of histor­ ic earthquakes (Table IA), and major earthquakes of M 6.0 or greater (Table IB) that affected the SONGS area; (3) list of nearby earthquakes greater than VI on the Modified Mercalli Scale; (4) earthquake recurrence curves (Plates S-8A & S-8B); (5) SONGS Units 2 and 3 design earthquake character­ istics (Table II) and site response spectra (Table III); and (6) discussion of the major fault zones around SONGS (Whittier-Elsinore fault zone, San Andreas fault zone, Newport-Inglewood fault zone, Offshore fault zone). Data used for the seismic hazard analysis were taken from existing litera­ ture. No field investigations of faults were undertaken.

This study concludes that an Operating Basis Earthquake (QBE) of 0.25g horizontal acceleration and a Design Basis Earthquake (DBE) of 0.40g hori­ zontal acceleration are acceptable for SONGS Units 2 and 3.

70-3 Marine Advisers, Inc., April 24, 1970, Continuous seismic pro­ filing investigations of the continental shelf off San Onofre, Cali­ fornia: in the PSAR for SONGS, Appendix 2B, 28 p. (70-4)

Report of a continuous seismic profiling survey conducted offshore from SONGS using four systems: (1) Sparker; (2) High-Resolution Boomer; (3) 7-kHz High-Resolution Profiler; and (4) Side-Scan Sonar. The study investigated the offshore extensions of the Cristianitos and Newport- Inglewood fault zones (NIFZ) and mapped the geologic structure of the continental shelf and slope.

48

The report concludes: (1) no offshore faults project toward or through SONGS; (2) seaward from SONGS two faults cut a generally west- dipping homoclinal structure, with a minor fault "E" located 1 mile off­ shore and a major fault "A" located 5 miles offshore; (3) a possible branch of the NIFZ was detected offshore from Newport Beach, but its relation to fault "A" is unresolved; and (4) offshore the Cristianitos fault turns southeast and does not intersect fault "A" in the area studied. Figures include location of survey lines (Figs. 1-3), a structural contour map (Fig. 4), samples of seismic profiles (Figs. 5-8, 10 and 11), and the possible correlation between NIFZ and fault "A" (Fig. 9).

70-4 Southern California Edison Company and San Diego Gas and Electric Company, 1970, Preliminary Safety Analysis Report (PSAR) for San Onofre Nuclear Generating Station (SONGS), Units 2 and 3, 6 volumes.

Preliminary report submitted to the Atomic Energy Commission in sup­ port of the application for a construction permit for SONGS Units 2 and 3. This report has 21 amendments containing corrections, additions, and con­ sultants' reports. Geologic and seismologic data are contained in Volume II, Section 2 ("Site and Environment") with Subsection 2.9 ("Geology") and 2.10 ("Seismology"). Subsection 2.9 is a brief summary of the general geologic setting for SONGS and refers to Appendices 2A and 2B for reports by Converse, Davis and Associates (70-1), and by Marine Advisers, Inc. (70- 3) for details on surrounding onshore and offshore geology, respectively. Subsection 2.10 is a brief summary of site seismology and refers to Appen­ dix 2B for a report by Dames and Moore (70-2) for details on the develop­ ment of the seismic design criteria.

Faults considered in the seismic design included the Elsinore, San Jacinto, San Andreas, Newport-Inglewood, Cristianitos, and three unnamed offshore faults. The seismic evaluation concluded that an earthquake on the San Andreas, San Jacinto, or the offshore fault "A" was the most likely to affect SONGS. Smoothed response spectra were developed and normalized to 0.25g for the Operating Basis Earthquake (QBE) and to 0.50g for the Design Basis Earthquake (DBE).

Appendices and amendments to the PSAR containing additional geotech- nical data and consultants' reports are as follows:

Appendix 2A: Converse, Davis and Associates, 1970, Geologic report on the probability of ground displacement of faults in the vicinity of the San Onofre Nuclear Power Plant Site, Units 2 & 3, San Diego, California. (70-1)

Appendix 2B: Marine Advisers, Inc., April 24, 1970, Continuous seismic profiling investigations of the continental shelf off San Onofre, California. (70-3)

Appendix 2C: Board of Technical Review, January 29, 1971a, Geologic structure of the continental shelf off San Onofre: Regional relationships and influence on seismicity. (71-2)

49

Appendix 2D: Southern California Edison Co., 1971, Responses to Atomic Energy Commission questions concerning seismology and geology at SONGS. (71-3)

Attachment 1: Effects on recorded data of being relatively near the rupture trace.

Attachment 2: Discussion of confirmation provided for San Onofre analytical model by San Fernando Earthquake results.

Appendix 2E: Southern California Edison Co., April 1, 1972, San Onofre site geology and seismicity, overall summary.

Attachment 1: Western Geophysical Company of America, March 7, 1972, Final report: San Onofre offshore investigations. (72-4)

Attachment 2: Woodward-McNeill and Associates, April 5, 1972, Estimates of site dynamic response, SONGS, Units 2 & 3. (72-6)

Attachment 3: Woodward-McNeill and Associates, March 13, 1972, Material properties studies, SONGS. (72-5)

Attachment 4: Fugro, Inc., April 6, 1972, Re­ port of geologic and fault reconnaissance, vicinity of Oceanside, California. (72-1)

Appendix 2F: California Division of Mines and Geology, 1972, Report on the geologic investigation of the west branch of the Cristianitos fault in the Arroyo Trabuco area. (72-9)

Appendix 2G: Wilson, B.W., December 1972, Estimates of tsunami effect at San Onofre Nuclear Generating Station, Units 2 & 3, California. (72-10)

Appendix 2H: Woodward-McNeill and Associates, March 27, 1973, Evaluation of the stability of proposed 2:1 switchyard slopes and 1/2:1 slopes, SONGS, Units 2 & 3. (73-1)

Amendment No. 1 to Preliminary Safety Analysis Report for San Onofre Nuclear Generating Station, Units 2 and 3, Southern California Edison Company and San Diego Gas and Electric Company (PSAR - SONGS), August 31, 1970.

I. Additional information concerning geology and seismology:

50

1. Comparison of the geologic investigation of the San Onofre site with that required for surface faulting by the AEC tentative geologic and seismic siting criteria (included in subsection 1.8).

2. Comparison of the geologic and seismological conditions at San Onofre and Bolsa Island sites (included in subsection 1.8).

3. Additional data concerning age dating used in the study of the Cristianitos fault (additional data supporting conclu­ sions of Appendix 2A, PSAR (included in subsection 2.9).

II. Appendix 2B replaced in entirety by:

1. Dames and Moore, April 15, 1970, Seismic and foundationstudies, proposed Units 2 and 3, San Onofre Nuclear Generat­ ing Station, San Onofre, California. (70-2)

2. Marine Advisers, Inc., April 24, 1970, Continuous seismic profiling investigation of the continental shelf off San Onofre, California. (70-3)

III. Subsections and figures amended in Geology (2.9) and Seismicity (2.10) sections: 2.9.5, Areal Subsidence; Figure 2.9-2, Plot Plan & Geologic Map; 2.10.5, Site Seismic Evaluation; Figure 2.10-2, Smoothed Response Spectra. Other changes occur in: 2.5.1, Grading; 2.7, Hydrology; Appendix 2A, pp. 3, 6, 7 & 22; all of Appendix 2B.

Amendment No. 3, PSAR - SONGS, November 23, 1970

I. Response to specific items of interest: these items are of such a nature that it is not practical to include them in the text of the PSAR. Items of interest to geology and seismol­ ogy are listed under Section 2, Site and Environment; ques­ tions include:

1. 28 ft tsunami discussion2. Areas of offshore oil-withdrawal subsidence3. Data on "areal subsidence" (PSAR 2.9.5)4. Coastal terraces, stratigraphic position and minimum

age (PSAR 2.9.4)5. Summary of Dr. Leonard Palmer's dissertation on marine-

terrace sequence and continuity (PSAR 2.9.4)6. Additional data on Cristianitos fault (PSAR 2.9.4)7. Offshore structures between faults "D" and "E" dis­

cussed further.8. Additional discussion on Cristianitos fault geomorphic

characteristics.

51

II. Sections replaced in Geology (2.9) and Seismicity (2.10) sections: 2.9.A, Structures; 2.9.5, Areal Subsidence; 2.9.6, Foundations; 2.9.7, Excavated Slopes; 2.10.5, Site Seismic Evaluation; 2.10.6, Installation of Strong Motion Earthquake Recording System.

Amendment No. 10, PSAR - SONGS, June 16, 1971

I. Response to specific items of interest; questions include:

1. 28 ft tsunami discussion2. Cristianitos fault geomorphic features3. Extension of fault "A" of Marine Advisers report (70-3)

II. Subsections and figures amended in Geology (2.9) and Seismicity(2.10) sections: 2.9.1, General; 2.9.2, Physiography; 2.9.5, Areal Subsidence; 2.9.7, Excavated Slopes; 2.10.2, Seismic Investigation; 2.10.4.3, Offshore Faults; 2.10.5, Site Seismic Evaluation; 2.10.6, Installation of Strong Motion Earthquake Recording System.

III. Appendix 2D - Responses to AEC questions concerning seismicity and geology. Discusses the offshore geology at the San Onofre site and includes calculations for site accelerations for a M 7 and larger event.

Amendment No. 11, PSAR - SONGS, April 1, 1972

I. Response to specific items of interest; questions include:

1. Comparison of geologic investigations with AEC siting criteria.

2. Additional data supporting offshore trend of Cristianitos fault.

3. Additional data for structures between faults "D" and "E"offshore.

A. Additional data for analysis of structures relating toCristianitos fault.

5. Data to support seaward extension and seismic potential of the Pelican Hills fault.

6. Additional seismic design basis for Operating Basis Earth­ quake (QBE) and Design Basis Earthquake (DBE) response in Appendix 2E.

7. Discussion of displacement on Cristianitos fault near San Onofre.

II. Subsections and figures amended in Geology (2.9) and Seismicity (2.10) sections: 2.9.1, General; 2.9.2, Physiography; 2.9.A, Structures; 2.10.2, Seismic Investigations; 2.10.5, Site Seismic Evaluations.

52

III. Changes in or additions to appendices:

Appendix 2E added: "San Onofre Site geology and seis­ mology" includes three additional consultants' reports:

Attachment 1: Western Geophysical Company of America, March 7, 1972, San Onofre offshore in­ vestigation. (72-4)

Attachment 2: Woodward-McNeill and Associates, April 5, 1972, Estimates of site dynamic response, San Onofre Nuclear Generating Station, Units 2 & 3. (72-6)

Attachment 3: Woodward-McNeill and Associates, March 13, 1972, Material property studies, San Onofre Nuclear Generating Station. (72-5)

Amendment No. 12, PSAR - SONGS, April 18, 1972

I. Appendix 2E, Attachment 4: Fugro, Inc., April 6, 1972, Report of geologic and fault reconnaissance, vicinity of Oceanside, California. (72-1)

II. Subsection and figure amended in Seismicity section (2.10): 2.10.6, Installation of Strong Motion Earthquake Recording System; Appendix 2E.

Amendment No. 13, PSAR - SONGS, May 15, 1972

Response to specific items of interest; questions include:

1. Expanded discussion on seismic design.2. Comparison of site response spectra.3. Comparison of geologic data with Western Geophysical's

offshore data for Cristianitos fault.4. Relationship between Cristianitos and South Coast

Offshore fault.5. Evidence supporting lack of activity on the Cristianitos

fault.6. Major offshore faults.7. San Joaquin structural high.8. South Coast Offshore fault and Rose Canyon fault compared.

Amendment No. 16, PSAR - SONGS, October 12, 1972

I. Discussion on slope stability analysis.

II. Discussion on study of the effects of a tsunami generated nearby from an offshore earthquake.

III. Design spectra for various values of damping and design basis acceleration time history.

53

IV. Appendix 2F: California Division of Mines and Geology, 1972, Report on the geologic investigation of the west branch of the Cristianitos fault in the Arroyo Trabuco area. (72-9)

Amendment 17, PSAR - SONGS, April 18, 1973

I. Appendix 2G: Wilson, B.W., December 1972, Estimate of tsunami effects at San Onofre Nuclear Generating Station, Units 2 & 3, California. (72-10)

II. Appendix 2H: Woodward-McNeill and Associates, March 27, 1973, Stability of proposed slopes for the proposed Units 2 & 3, San Onofre Nuclear Generating Station, San Onofre, California. (73-1)

71-1 Converse, Davis and Associates, June 4, 1971, Preliminary Geo­ logic Report of the Coastal Central Portion of Camp Pendleton Marine Base, San Diego County, California, for City of Los Angeles, Department of Water and Power, 20 p. (71-1)

Siting study of 9 miles of seacliffs and adjacent inland areas from SONGS southeast to Aliso Canyon to examine the geologic conditions along the coast east of the Cristianitos fault. Five locations of terrace off­ sets are noted, but the report concludes that they are of nontectonic origin. The two appendices contain foraminiferal correlations of the bedrock.

71-2 Southern California Edison Company, Board of Technical Review, January 29, 1971a, Geologic structure of the continental shelf off San Onofre: Regional relationships and influence on seismicity: in PSAR for SONGS, Appendix 2C, 55 p. (70-4)

Findings of a group of consultants to SCE reviewing offshore data to evaluate the possible connection between fault "A" offshore from SONGS and the Newport-Inglewood fault zone (NIFZ). The Board concluded that: (1) structure near the edge of the continental shelf off SONGS is a gentle anticline-syncline with discontinuous faults; (2) the NIFZ dies out south­ east of Laguna Beach; (3) the Cristianitos fault dies out about 10,000 feet offshore from SONGS; (4) the NIFZ is a localized zone of deformation caused by north-south compression during post-Oligocene time; Cenozoic activity dies out to the southeast with no related offshore geologic structure or seismicity south of Laguna Beach; and (5) the earthquake that could be felt by SONGS is limited by the NIFZ length (90 km) and will cause a 0.17g ground acceleration at SONGS, less than 0.25g previously estimated for a San Andreas rupture. The report contains 14 figures, mostly seismic- reflection profiles and profile location maps.

54

71-3 Southern California Edison Company, 1971b, Responses to Atomic Energy Commission questions concerning seismology and geology at SONGS: in PSAR for SONGS, Appendix 2D, p. 2D-1 to 2D-21. (70-4)

Report in response to AEC questions on the SONGS site geology and seismology. The report describes the offshore geology at SONGS and the basis for concluding that a major earthquake on the South Coast Offshore fault zone (SCOFZ) is not credible. Also included is a discussion of the SONGS' seismic design based on a hypothetical event on the SCOFZ. This report contains two attachments: (1) effects on recorded data of being relatively near the rupture trace; and (2) discussion of confirmation provided for San Onofre analytical model by San Fernando earthquake results.

71-4 Woodward-McNeill and Associates, October 14, 1971, Elastic andDamping Properties, Laydown Area, San Onofre Nuclear Generating Station, 8 p., 8 appendices.

Report giving the elastic and damping parameters of the SONGS area for the proposed expansion of Units 2 and 3. The data include modulus values from both field and laboratory measurements, hysteretic damping values, spatial damping values, spring constants, and various physical and mechani­ cal properties of the soil and rock. The report includes eight appendices containing backup data for the conclusions.

72-1 Fugro, Inc., April 6, 1972, Report of geologic and fault recon­ naissance, vicinity of Oceanside, California: in the PSAR for SONGS, Appendix 2E, Attachment 4, 8 p. (70-4)

Reconnaissance study using air-photo interpretation, previous geologic studies, and selected geologic field observations of 120 square miles including the City of Oceanside and Camp Pendleton Marine Base to identify major faults.

The report concludes that two roughly-parallel, north-northeast-striking high-angle faults trend from Camp De Luz (on Camp Pendleton) to the City of Oceanside. Observations at ten locations indicate these faults cut pre- Tertiary to middle Miocene rock and possibly Holocene marine and river terraces. Six plates show selected outcrop photos taken at the locations along the faults.

72-2 National Oceanic and Atmospheric Administration, 1972, Report on the site seismicity for the SONGS, Units 2 and 3, Seismological Investi­ gations Group of the Earth Sciences Laboratories: in U.S. AEC Safety Evaluation of the SONGS Units 2 and 3, 1972, Appendix D, p. Dl to D7. (72-3)

Review of the SONGS PSAR (70-4) and the USGS (72-8) report. Concludes that the South Coast Offshore fault zone is the most critical fault for the

55

SONGS design and recommends that a 0.67g acceleration from an Intensity X (Modified Mercalli Scale) event within a few miles of the SONGS site be used for design.

72-3 United States Atomic Energy Commission, 1972, Safety Evaluation of the San Onofre Nuclear Generating Station Units No. 2 and 3, Docket Nos. 50-361 and 50-362, 112 p.

Report on the effects of a variety of man-made and natural hazards likely to occur at SONGS. Based upon its own consultants' studies, the AEC considers the South Coast Offshore Zone of Deformation to be continuous with the Newjiort-Inglewood fault zone and the Rose Canyon fault, giving a total length of deformation of 240 km. The AEC therefore recommends that an acceleration of 0.67g can be expected to affect SONGS from a maximum Intensity X (Modified Mercalli Scale) earthquake. The AEC indicates that the revision by Southern California Edison Company of the Design Basis Earthquake to 0.67g and the Operating Basis Earthquake to 0.33g is accep­ table.

Two AEC-consultant reports used for seismic hazard evaluation are included in the appendices (see Appendix C, U.S. Geological Survey, 72-8 and Appendix D, NOAA, 72-2).

72-4 Western Geophysical Company of America, March 7, 1972, Final report: San Onofre offshore investigation: in the PSAR for SONGS, Appendix 2E, Attachment 1, 43 p. (70-4)

Geophysical surveys were conducted to provide a detailed picture of the subsurface structure down to acoustic basement in an area extending from Long Beach to Rose Canyon and westward to a line about 30 miles offshore from SONGS. The study includes interpretation of 1,000 line-miles of seismic-reflection and -refraction data, 450 line-miles of seaborne magnetometer data, and analysis of existing gravity data. The results are presented in a series of structural contour maps, fault anomaly maps, and annotated seismic profiles.

The report concludes that the Newport-Inglewood fault zone offsets upper Miocene strata and terminates offshore and southeast of Newport Beach against the San Joaquin Hills anticlinal high. The South Coast Offshore fault is closest to SONGS, strikes northwest-southeast and is approximately 5 miles from shore. This fault does not appear to connect with the Newport-Inglewood fault zone to the northwest or with the Rose Canyon fault to the southeast. The South Coast Offshore fault, about 40 miles long, has vertical and possibly right-lateral displacement. Displacement dies out in the uppermost Miocene-Pliocene strata.

72-5 Woodward-McNeill and Associates, March 13, 1972a, Material prop­ erties studies, SONGS: in the PSAR for SONGS, Appendix 2E, Attach­ ment 3, 5 p. (70-4)

Foundation engineering study presenting the results of the measurement of the elastic and damping parameters of the soils at SONGS. Data collect-

56

ed from both field and laboratory measurements are presented. Appendices A to H present details on the investigation and include a report on seismic velocities by Weston Geophysical Engineering, Inc. (Appendix C).

72-6 Woodward-McNeill and Associates, April 5, 1972b, Estimates ofsite dynamic response, SONGS, Units 2 & 3: in the PSAR for SONGS, Appendix 2E, Attachment 2. (70-4)

Engineering report presenting soil/rock dynamic characteristics at SONGS and estimates of site response to earthquakes from hypothesized movement on postulated causative faults. Calculations are based on maximum accelerations of 0.12g and 0.5g, using a family of earthquakes with a broad range of earthquake characteristics, from several causative faults (San Andreas, San Jacinto, Elsinore, and Newport-Inglewood).

72-7 Southern California Edison Company, April 1, 1972, San Onofre site geology and seismology, overall summary: in the PSAR for SONGS, Appendix 2E, p. 2E-1 to 2E-23. (70-4)

Report updating the seismic design basis for SONGS Units 2 and 3, based on additional studies conducted since the original PSAR publication; these additional studies can be found in Appendices 2.5A to 2.5D of the PSAR for SONGS (70-4). Contains a detailed discussion of the South Coast Offshore fault zone (SCOFZ), the Rose Canyon fault, and the San Joaquin Hills structural high. Also included are discussions of seismic design criteria, including fault activity, site acceleration, Design Basis Earth­ quake (DBE), Operating Basis Earthquake (QBE), and site dynamic response. These topics are supported by three consultants' reports in the appendices.

The report concludes that although investigations of the SCOFZ indi­ cate a low potential for rupture, Southern California Edison Company has hypothesized such an event and used it to determine the resultant site acceleration of SONGS. The resultant DBE site acceleration is 0.5g and the QBE is 0.25g.

72-8 United States Geological Survey, 1972, Review of relevant geology for San Onofre Nuclear Generating Station (SONGS); in U.S. Atomic Energy Commission Safety Evaluation for SONGS, 1972, Appendix C, p. Cl to C36. (72-3)

A concluding supplemental report reviewing the SONGS PSAR (70-4) and its amendments and appendices, with particular attention to the fault model for the Safe Shutdown Earthquake (SSE). Parts of a previous review report given to the AEC on July 2, 1971 are included in this appendix, but the details are not repeated. This report disagrees with the PSAR and the report by Western Geophysical Company (72-4) on the length and activity of the South Coast Offshore Zone of Deformation, and concludes that the SCOZD has been intermittently active since the middle Miocene, is a potentially- active continuous zone of deformation approximately 240 km long, and is located 5 miles from SONGS. This zone is recommended to be used for the SONGS SSE.

57

72-9 California Division of Mines and Geology, 1972, Report on the geologic investigation of the west branch of the Cristianitos fault in the Arroyo Trabuco area: in the PSAR for SONGS, Appendix 2F, 7 p. (70-4)

Report of a detailed geologic study on the Cristianitos fault, in­ cluding a backhoe excavation to investigate possible evidence of Holocene displacement. The study concludes that suggestions of recent fault move­ ment at the excavation area may be due to landsliding or rock creep. No evidence for Holocene faulting on the Cristianitos fault was found.

72-10 Wilson, B.W., December 1972, Estimates of tsunami effect at San Onofre Nuclear Generating Station, Units 2 and 3, California: in the PSAR for SONGS, Appendix 2G, 83 p. (70-4)

The possible effects of a tsunami generated by a hypothetical M 7.5 earthquake 5 miles offshore from SONGS were evaluated, assuming a horizon­ tal strike-slip displacement of 7.5 meters and a vertical displacement of 2.2 meters. Maximum run-up and draw-down predicted from a M 7.5 earthquake is 4.8 meters (at high tide) and 2.8 meters (at low tide).

73-1 Woodward-McNeill and Associates, March 27, 1973, Evaluation ofthe stability of proposed 2:1 switchyard slopes and 1/2:1 slopes, SONGS, Units 2 & 3,in the PSAR for SONGS, Appendix 2H, 96 p. (70-4)

Soil engineering report evaluating the static and dynamic slope stability of proposed slopes at SONGS. The report contains ten figures and seven appendices.

74-1 Woodward-McNeill and Associates, I974a, Analyses of Properties of Finer-grained San Mateo Sand, SONGS Units 2 & 3, San Onofre, California, 6 p.

Tests and analyses made for this study indicate the more fine-grained San Mateo Sand has static and dynamic strength of the same magnitude as previously determined for the more coarse-grained San Mateo Sand. Labora­ tory tests performed included static and dynamic triaxial tests, compaction tests, grain-size distribution tests and specific gravity tests.

74-2 Woodward-McNeill and Associates, December 19, 1974b, Offshore Liquefaction Evaluation for the Proposed Units 2 and 3, SONGS, San Onfore, California, 10 p.

Engineering report on the liquefaction potential of the San Mateo Sand which will underlie the proposed cooling-water intake and outtake system offshore from SONGS. The report presents dynamic strength characteristics of the San Mateo Sand, a finite element analysis using the SONGS Design

58

Basis Earthquake (DBE) and an analytical factor of safety against liquefaction. The reader is referred to Woodward-McNeill (73-1) on slope stability for SONGS Units 2 and 3 for DBE data.

74-3 Fugro, Inc., July 5, 1974a, Analysis of Geologic Features Re­ vealed during Grading at San Onofre Nuclear Generating Station, Units 2 and 3, 32 p. and appendices.

Presents observations and conclusions about planar features revealed in foundation excavations during grading of SONGS Units 2 and 3. Discussed in this report are features in the San Mateo Formation which are discontin­ uous, conjugate, joint-like shears (named "A" features and "B" features according to orientation). They are postulated to have resulted from northwest-southeast regional compressional stresses. The features do not displace the overlying marine terrace platform and are therefore older than 70,000 - 130,000 years. Based on this investigation the features are not considered capable faults in terms of AEC criteria.

74-4 Fugro, Inc., November 1, 1974b, Analysis of C and D Type Fea­ tures at the San Onofre Nuclear Generating Stations, 19 p. and appen­ dices.

Presents observations and conclusions on geologic features revealed during the excavation of SONGS, Units 2 and 3, at a lower elevation than previous Type A and B features (74-3). The report concludes that the Type C features are short and diffuse, are entirely within the San Mateo Forma­ tion, and except for attitude are similar to Type A and B features. The Type D features are not continuous across the site, displace A and B features, do not displace the 70,000 to 130,000 year old marine terrace platform and their formation is consistent with the stress system that produced the Type A and B features. These features are not considered capable faults in terms of AEC criteria.

75-1 Fugro, Inc., September 12, 1975a, Summary of geomorphic and age data for the first emergent terrace (Qtj) at SONGS: in Southern California Edison Co., 1976, Recent Geotechnical Studies, Southern Orange County, California, for SONGS Units 1, 2 & 3, Volume I, Enclosure 1, Appendix C, 52 p. (76-2)

Detailed geologic study of the Sangamon or first emergent terrace (Qt,) at SONGS and its correlation with other Sangamon-age terrace from San Diego to Monterey, California (Fig. 3). A description is given of the Qt^ terrace at SONGS, along with a summary of early-to-late Pleistocene geomorphic history of the SONGS area and diagrammatic cross sections. The lack of displacement of the basal Sangamon-age terrace gravel, which over­ lies the Cristianitos fault, is given as evidence of no movement on the Cristianitos fault for at least the last 120,000 years. The methods and reliability of uranium-series age determinations, and a listing of all age dates used for the Sangamon-age terrace correlation, are also discussed.

59

75-2 Fugro, Inc., September 15, 1975b, Geomorphic analysis of terraces in San Juan and Bell Canyons, Orange County, California: in Southern California Edison Co., 1976, Recent Geotechnical Studies, Southern Orange County, California, for SONGS Units 1, 2 & 3, Volume I, Enclosure 2, 21 p. (76-2)

Detailed geomorphic study of the stream and marine terraces of San Juan and Bell Canyons and of the Dana Point area to determine the ages of Quaternary stream deposits, and to demonstrate whether they are deformed across the Cristianitos fault. The terraces were mapped at a scale of 1 inch - 2,000 feet using map elevations and precise barometric altimeter measurements to obtain an overall accuracy of +_ 2 feet in elevation. Stream-terrace profiles of the canyons indicate no warping, tilting or offset across the Cristianitos fault. The two lowest stream terraces in the canyons are correlated with marine terraces estimated to be 120,000 to 200,000 years old. The study concludes that no movement has occurred on the Cristianitos fault for at least 120,000 years.

75-3 Fugro, Inc., November 1, 1975c, Geologic investigation of thebulldozer excavation at the proposed Viejo Substation site: in Southern California Edison Co., 1976, Recent Geotechnical Studies, Southern Orange County, California, for SONGS Units 1, 2 & 3, Volume I, Enclosure 1, Appendix A, 2 p. (76-2)

Letter describing an investigation of the Cristianitos fault exposed in a bulldozer trench within a proposed electrical substation site. The trench was logged at a scale of 1 inch = 5 feet, with details at 1 inch = 2 feet. Four traces of the Cristianitos fault are exposed and have an aver­ age strike of N3°W. The largest fault juxtaposes Puente Formation against Capistrano Formation with displacement probably down on the west. A Pleis­ tocene fluvial terrace deposit overlies the fault traces without displace­ ment .

75-4 Fugro, Inc., November 14, 1975d, Geologic investigation of the Mission Viejo (F. Beach Leighton) bulldozer excavation: in Southern California Edison Co., 1976, Recent Geotechnical Studies, Southern Orange County, California, for SONGS Units 1, 2 & 3, Volume I, Enclosure 1, Appendix B, 3p. (76-2)

Letter summarizing findings from excavation of bulldozer and backhoe trenches to clarify and augment earlier findings of an investigation for a residential development across the Cristianitos fault. The trenches were logged at a scale of 1 inch » 2 feet and contained two vertical shears trending N5°W and displaying evidence of vertical slip. A previously described lime-filled crack does not relate to fault traces of theCristianitos fault, but instead lies 8 to 12 feet southwest of the fault. Other lime-filled cracks in the overlying soil are related to the shrink- swell characteristics of the soil rather than to fault displacements. No evidence for Holocene movement on the Cristianitos fault was found.

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75-5 West, J.C., November 1975, Generalized subsurface and geophys­ ical study, Capistrano area, Orange County, California, for SONGS Units 2 and 3: in Southern California Edison Co., 1976, Recent Geotechnical Studies, Southern Orange County, California, Volume II, Enclosure 3. (76-2)

Report of an investigation of a 350 square-mile area in the Cristian- itos Embayment adjacent to the Cristianitos fault and between the San Joaquin Hills and the Santa Ana Mountains to aid in the understanding of recent seismic activity of the area. Five subsurface contour maps and geologic structure sections were prepared using seismic-reflection pro­ files, gravity (820 stations), aeromagnetic (2,100 line miles), and well- log (118 wells) data. This report concludes that the Cristianitos fault is a normal fault with down-to-the-west vertical separation of between 1,700 to 4,000 feet in the central onshore portion. No significant movement appears to have occurred since late Pliocene time.

75-6 Biehler, S., November 1975, Seismological investigations of the San Juan Capistrano area, Orange County, California, for SONGS Units 2 & 3: in Southern California Edison Co., 1976, Recent Geotechnical Studies, Southern Orange County, California, Volume II, Enclosure 4, (76-2)

Evaluates the relationship between the central part of the Cristian­ itos fault and two earthquakes (M 3.8 and 3.3) that occurred on January 3, 1975, near San Juan Capistrano. The study included re-analysis of the original Caltech seismological data, establishment of a portable seismo­ graph network (6 units) to monitor microseismicity, detonation of two calibration shots to develop a more accurate crustal model, review of historic seismicity, and analysis of oil company seismic-reflection data.

Conclusions of the report are: (1) the two earthquakes cannot be located on the Cristianitos fault; (2) the focal mechanisms indicate motion in the thrust-left-slip direction, opposite the geohistoric Cristianitos fault movement; (3) the earthquakes are associated with a northwest- dipping, northeast-trending fault, oblique to the Cristianitos fault; (4) microseismicity is very low for the Cristianitos fault; most of the activity recorded by the microseismic network is associated with the Elsinore fault. The author speculates that the January 3, 1975, earthquakes occurred from settlement within the Capistrano embayment.

The report contains 24 figures, 17 tables, and two appendices (8 figures, 6 tables). Most of the tables and figures deal with data from the main seismic events. Figure 23 is an aeromagnetic contour map of the Santa Barbara - San Pedro Channel (scale 1 inch =1.5 miles; contour interval = 10 gammas). Figure 24 is a Bouguer gravity map of the Capistrano Embayment (scale 1 inch « 0.65 miles; contour level « 1 milligal).

76-1 Fugro, Inc., August 1976, Final report on geologic features at the San Onofre Nuclear Generating Station, Units 2 and 3: Consultants' report for Southern California Edison Co., 24 p.

Summarizes observations and conclusions on shears and other features

61

in the San Mateo Formation found during the excavation of the SONGS Units 2 and 3 Containment Building foundations previously reported in Fugro (74-3, 74-4). The report concludes that offsets (Features A through D) are joint- like conjugate shears and are older than 120,000 years because they do not offset the first emergent marine terrace. A model is presented which reasons that the features were caused by north-south compression. Five drawings showing the SONGS Unit 2 and 3 excavations, profiles, and regional stress patterns are given. Appendix A gives five detailed photos and graphic logs of the geologic features.

76-2 Southern California Edison Company, 1976, Recent Geotechnical Studies, Southern Orange County, California, for SONGS Units 2 & 3, Volumes I & II.

This report includes six reports by consultants for SONGS indexed as follows:

Volume I:

Enclosure 1: Appendix A, Fugro, Inc., November 1, 1975c (75-3) Appendix B, Fugro, Inc., November 14, 1975d (75-4) Appendix C, Fugro, Inc., September 12, 1975a (75-1)

Enclosure 2: Fugro, Inc., September 15, 1975b (75-2)

Volume II:

Enclosure 3: West, J.C., November 1975 (75-5)

Enclosure 4: Biehler, S., 1975 (75-6)

For the annotations for these reports, refer to listing by author.

77-1 Anderson, Warren, and Associates, 1977, Results of microfossil identification and geologic age correlation, vicinity of SONGS, California: in Southern California Edison Co., 1977, Geotechnical Studies, Northern San Diego County, California, for SONGS Units 1, 2, & 3, Appendix A, Enclosure 3, 36 p. (77-6)

A sequence of letters identifying fossils from localities in Ehlig (77-2). Of interest is a Pacific Coast and Indo-Pacific regional correlation chart of calcareous and siliceous microplankton compiled by the consultants.

77-2 Ehlig, P.L., September 13, 1977, Geologic report on the area adjacent to the SONGS, northwestern San Diego County, California: in Southern California Edison Co., 1977, Geotechnical Studies, North­ ern San Diego County, California, for SONGS Units 1, 2, & 3, Enclosure 3, 40 p.

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Geologic description of 60 square kilometers surrounding SONGS, from San Mateo Canyon southeastward to Las Pulgas Canyon, and inland from the shoreline to the eastern side of the San Onofre Mountains; includes a detailed geologic map of the coastal area surrounding SONGS. The investi­ gation emphasized evidence bearing on the tectonic stability of the area, and the stability of the southern end of the Cristianitos embayment and its related faults.

The report concludes that: (1) the coastal area has been tectonically stable since late Pliocene, based on an undeformed marine terrace sequence and a continuous tuff unit near Horno Canyon; (2) the Cristianitos fault is the only major fault in the area, having 900 feet of down-on-west normal movement, the latest movement on which was before the formation of the lowest marine terrace (120,000 y. B.P.); and (3) four faults (the most notable is fault "E") mapped on the northwest flank of the San Onofre Mountains, east of the Cristianitos fault, are minor and show no evidence of Quaternary displacement.

The report includes three large map plates (scale 1 inch « 500 feet), seven cross-sections, a list of fossils (Table 1) and their locations (Fig. 3), and a stratigraphic column of the SONGS vicinity (Fig. 10). Appendix A is a fossil identification report prepared by Anderson, Warren, and Associates (77-1).

77-3 Fugro, Inc., October 15, 1977a, Report of geologic investiga­ tions, Trail Six (Area 1) and Horno Canyon (Area 2) landslides south­ east of SONGS: in Southern California Edison Co., 1977, Geotechnical Studies, Northern San Diego County, California, for SONGS Units 1, 2, & 3, Enclosure 1, 31 p. (77-6)

Two coastal areas were investigated south of SONGS where extensive landsliding and offsetting of the 120,000 years old bedrock/terrace contact has occurred. In the Trail Six area offset of the contact does not extend beyond the landslide mass and is not coincident with other evidence of faults, thus indicating a nontectonic origin for the fractures. In the Horno Canyon area multiple episodes of landsliding have occurred, and the graben feature observed there is confined to an ancient landslide mass, likewise indicating that the displacement of the bedrock/terrace contact is not of tectonic origin. Numerous large and small scale maps, terrace profiles, and geologic cross-sections accompany the report.

77-4 Pickard, Lowe, and Garrick, Inc., April 1977, Nuclear Power Plant Siting, Camp Pendleton Marine Corps Base, for San Diego Gas and Elec­ tric Co., 124 p.

Preliminary study to screen areas for the siting of a nuclear gener­ ating station within Camp Pendleton using existing geologic, seismologic, population and base-operations data.

Section 4 of this report, the Safety Assessment, contains a summary of the geology/seismology of Camp Pendleton and includes a generalized geolog­ ic map (Fig. 4.6, scale about 1:110,000) and a fault and photolineament map of Camp Pendleton (Fig. 4.7, scale about 1:110,000).

63

77-5 Southern California Edison Company, March 21, 1977a, Final Safety Analysis Report (FSAR) for San Onofre Nuclear Generating Station (SONGS), 17 volumes.

A multidiscipline report in 17 volumes, with information on geology and seismology contained in Volume 3 and Volume 4.

Volume 3 contains a subsection on basic geology and seismic informa­ tion, vibratory ground motion, surface faulting, stability of subsurface materials and foundations, slope stability, and embankments and dams. Subsection 2.5.1 (Basic Geology/Seismology) contains a brief discussion of the regional and local faults affecting SONGS. A major part of the volume is contained in subsection 2.5.2 (Vibratory Ground Motion) and deals with the regional seismicity and effects. Tables list: (1) the noninstrumented earthquakes within 200 miles (Table 2.5-1) and 50 miles (Table 2.5-3) of SONGS; (2) instrumented epicenters within 200 miles (Table 2.5-2) and 50 miles (Table 2.5-4); (3) strong motion records within 200 miles (Table 2.5-6); and (4) geologic failures from earthquakes within 200 miles (Table 2.5-7). Volume 3 contains 78 figures which include: geology and fault maps, cross-sections, subsidence map, accelerograms, plots of epicenters within 50-and 200-mile radii, and soil engineering results. Volume 4 contains appendices to the geotechnical engineering reports on SONGS.

77-6 Southern California Edison Co., October 1977b, Geotechnical Studies, Northern San Diego County, California, for SONGS, Units 1, 2 & 3.

This report contains five consultants' reports for SONGS, indexed as follows:

Enclosure 1: Fugro, Inc., October 15, 1977a (77-3)

Enclosure 2: Fugro, Inc., October 15, 1977b (77-7)

Enclosure 3: Ehlig, P.L., September 13, 1977 (77-2)

Appendix A - Anderson, Warren and Associates, 1977 (77-1)

Enclosure 4: Shlemon, R.J. and Associates, 1977 (77-8)

For annotation of these reports see reference by author.

77-7 Fugro, Inc., October 15, 1977b, Geologic investigations of offsets in Target Canyon, Camp Pendleton, California: in Southern California Edison Co., 1977, Geotechnical Studies, Northern San Diego County, California, SONGS, Units 1, 2 & 3, Enclosure 2, 29 p. (77-6)

Previously reported bedrock/terrace offsets in the Target Canyon area of Camp Pendleton, 6.5 miles south of SONGS, were investigated by trenching and logging of three excavations to expose the offsets. The report indi-

64

cates that a 120,000-year-old bedrock/terrace contact is offset at seven localities within a zone measuring 1,000 feet by 2,000 feet with displace­ ments of up to 14 inches. The evidence indicates primarily dip-slip move­ ment along north to north-northeast striking faults.

The report concludes that several modes of tectonic or nontectonic origin may have caused the offsets, but that projection of the offset-zone would lie about 5 miles from SONGS. This location, combined with the probable small magnitude of the earthquake that might be associated with the faults, led the authors to conclude that the zone should not affect the already established seismic design criteria for SONGS Units 2 and 3.

77-8 Shlemon, R.J., and Associates, Inc., 1977, Geomorphic analysis of Fault "E," Camp Pendleton, California: in Southern California Edi­ son Co., 1977, Geotechnical Studies, Northern San Diego County, Cali­ fornia, for SONGS Units 1, 2 & 3, Enclosure 4, 12 p. (77-6)

Geomorphic study of fault "E" (Ehlig,77-2) in the coastal mountains and San Onofre Bluff areas southeast of SONGS. The report concludes that there is no evidence of displacement by fault "E" of the older (200,000 years) marine terraces (at elevation 350 ft) and that there is no other geomorphic evidence of young movement, i.e., spring lines, depressions, etc. Also, fault "E" does not offset the continental deposits of the San Onofre Bluffs which have a radiocarbon date greater than 37,000 years within the section. Using this age and assuming a sedimentation rate of about 1 ft/1,000 yr, the author estimates that the 100-foot-thick section of continental sediments is about 100,000 years old. The portions of the seacliff exposed indicate that the latest movement on fault "E" occurred before 25,000 - 30,000 years and very likely before 100,000 years ago. Appendix A is an age date from Geochron Labs.

78-1 Fugro, Inc., May 12, 1978, Geologic Investigation of Fault "E," Southeast of SONGS, San Onofre, California, 21 p.

Geologic investigation of the recently mapped northwest-striking fault "E" of Ehlig (77-2) located about 1-1/4 miles east of SONGS. Two trenches were excavated and logged at a scale of 1 inch « 5 feet. The report concludes that: (1) a marine terrace platform that is approximately 300,000 to 350,000 years old overlies Fault "E" and is not displaced; (2) the geomorphic, pedologic, and topographic evidence also suggests that there has been at least 300,000 years since the last movement along fault "E"; and (3) fault "E" is considered not capable according to criteria set forth by the NRC in 10 CFR 100, Appendix A.

78-2 Shlemon, R.J. and Associates, Inc., January 1978a, Late Quater­ nary Evolution of the Camp Pendleton - San Onofre State Beach Coastal Area, Northwestern San Diego County, California, for SONGS Units 2 & 3, 123 p.

The regional geology within several miles of SONGS was investigated to: (1) determine the Quaternary evolution of the Camp Pendleton - San

65

Onofre State Beach Coastal area, (CP-SOSB); (2) identify major coastal landforms; (3) date various Quaternary marine and nonmarine geologic units; and (4) identify and date the minimum age of last movement on any faults that may be found in the SONGS area.

The report concludes that: (1) nine distinct marine terrace deposits, at elevations from 55 feet to 1,250 feet, range in age from 125,000 to 780,000 years; (2) the alluvial fan deposit in the San Onofre Bluffs ranges from 125,000 years B.P. to the present, yielding a sedimentation rate of 10 to 25 cm/1,000 yr; (3) the coastal retreat of San Onofre Bluff is about 0.2 m/yr, similar to other central and southern California coastal areas; and (4) maximum uplift of CP-SOSB area for the last 125,000 years is about 4.2 cm/1,000 yr, indicating relative tectonic stability compared to elsewhere along coastal California.

The report contains tables listing: (1) radiocarbon age and location of continental samples in CP-SOSB area; (2) marine terrace areas and eleva­ tions in CP-SOSB area; and (3) tabulation of late Quaternary deformation rates of central and southern California coast.

78-3 Shlemon, R.J., and Associates, Inc., October 1978b, Late Quater­ nary Rates of Deformation, Laguna Beach - San Onofre State Beach, Orange and San Diego Counties, California, 40 p.

Late Quaternary (last 125,000 years) rates of deformation from Target Canyon to Laguna Beach, California, are estimated using the continuity and elevation of the first marine-terrace contact. Three components of defor­ mation are evaluated: (1) regional up-to-northwest longitudinal tilt; (2) seaward tilt north of San Clemente; and (3) average uplift for the region during the last 125,000 years. The study results were compared to pub­ lished rates of deformation for other southern California coastal areas, and are presented in Table 3.

The study concludes that: (1) the regional longitudinal uplift rate increases northward from 6 cm to 26 cm/1,000 yr from Target Canyon to Dana Point; (2) SONGS has a local uplift rate of 9 cm/1,000 yr and is relatively one of the most tectonically stable areas in southern California; and (3) any seaward tilt of the first emergent marine terrace between Camp Pendle- ton and Dana Point has been less than one degree.

78-4 Woodward-Clyde Consultants, July 14, 1978a, Geotechnical Evalu­ ation of Potential Island and Offshore California LNG Import Terminal Sites, 106 p.

Geotechnical investigation for two island and five offshore LNG termi­ nals to be located on and around Santa Rosa and Santa Cruz Islands, and offshore from Camp Pendleton. Generally discusses siting problems for the entire study area and provides limited site-specific geotechnical data as well as the results of a marine geophysical investigation for the five offshore sites. Figures and tables describe historic seismicity and faults around each site, but the reader is referred to a January 16, 1978, Wood­ ward-Clyde Consultants report on the mainland LNG sites, Appendix A, for detailed summary of faulting and seismicity.

66

78-5 Woodward-Clyde Consultants, 1978b. Report on the results of analyses performed on well 8 at the SONGS Units 2 and 3, San Onofre, California: Consultants' Report for Southern California Edison Co., 34 p. and appendices.

Evaluation of a subsurface cavity at dewatering well 8 and its effect on the performance of the adjacent structures in terms of foundation bear­ ing capacity. The effects of this cavity on settlement and bearing capa­ city of the containment structure were found to be very small and to not affect the integrity of the structure.

79-1 West, J.C., January 1979, Supplement to the Generalized Sub­ surface and Geophysical Study, Capistrano Area, Orange County, Califor­ nia, by West, J.D., 1975, 15 p. (75-5)

Supplements West (75-5) in response to NRC question 361.35 part (e) interpreting the relationship between onshore and offshore structures in the Capistrano Einbayment. Two contour maps (top of Monterey and base of Tertiary - top of Cretaceous), six geologic structure sections, and four annotated seismic-reflection profiles are included.

The report concludes that major tectonic activity within 10 miles of SONGS took place prior to the end of Pliocene time (^2 m.y.B.P.), and the region has been tectonically quiet since that time, except for the South Coast Offshore Zone of Deformation (SCOZD), which had probable late Pleis­ tocene movement. No late Pleistocene or younger faults were revealed within 5 miles of SONGS.

79-2 Woodward-Clyde Consultants, June 1979a, Report on the Evaluation of Maximum Earthquake and Site Ground Motion Parameters Associated with the Offshore Zone of Deformation for SONGS, 30 p.

Detailed geologic, seismologic, and earthquake engineering analyses are presented to estimate the maximum earthquake magnitude and maximum ground motion for the SONGS Design Basis Earthquake (DBE). The source of the DBE is the Offshore Zone of Deformation (OZD) about 5 miles (8 km) west of SONGS. The OZD is composed of the Newport-Inglewood Zone of Deformation (NIZD), the South Coast Offshore Zone of Deformation (SCOZD), and the Rose Canyon fault zone (RCFZ), which have a combined length of 145 miles (240 km). The DBE is estimated to be M 6-1/2, which yields a maximum ground acceleration of 0.67g at SONGS. An instrumental-mean and 84th-percentile response spectrum is developed from analysis of 56 earthquake records.

The report includes: detailed discussions of the NIZD, SCOZD, RCFZ, and the hypothesized OZD, and of worldwide strike-slip faults. The appen­ dices include: a discussion and tabulation of data on the OZD based on geologic literature; correlation of E-logs from oil wells; seismic reflec­ tion profiles; analysis of teleseismic data from the Long Beach earthquake of 1933; a tabulation of data on displacements and slip-rates on major strike-slip faults in California and the world; a discussion of the development of peak acceleration-attenuation relationships for soil, com­ bined soil and rock, and their applications to SONGS.

67

79-3 Shlemon, R.J. and Associates, Inc., July 1979, Late CenozoicStratigraphy, Capistrano Embayment, Coastal Area, Orange County, Cali­ fornia, 27 p.

Discusses the late Cenozoic stratigraphic markers between SONGS and Dana Point. Absolute and relative ages of these markers are used to deter­ mine the age of the most recent movement on the Dana Point fault, and the subsurface Vaciadero and Carr faults. The report concludes that: (1) the 125,000-year-old Terrace 1 is tilted up to the north between SONGS and Dana Point; (2) the Dana Point fault displaces the Tertiary Capistrano Formation but not Terrace 1; (3) the Vaciadero and Carr faults do not displace either the upper Capistrano Formation or the overlying Quaternary deposits; and (4) the last faulting in the coastal portion of the Capistrano Embayment, between Dana Point and SONGS, occurred earlier than 125,000 years ago.

79-4 Woodward-Clye Consultants, 1979b, Report of the exploration/ demobilization of wells 4 and 5, SONGS Units 2 & 3: Consultant's Report for Southern California Edison Co., 27 p. and appendices.

Investigation of the areas around wells 4 and 5 to detect and delin­ eate possible cavities caused by dewatering operations. A small cavity in well 5 was stabilized by pressure grouting. Both wells were capped and considered demobilized.

80-1 Menard, H. W., November 26, 1980, Letter from U.S. GeologicalSurvey to NRC reviewing geologic and seismologic data for SONGS Units 2 and 3; in USNRC Safety Evaluation Report, 1980, Appendix G, p. Gl to G7. (80-4)

Letter reviewing the geologic and seismologic data for SONGS Units 2 and 3, including an addendum to a previous USGS review by Morris (80-2). This and the Morris review conclude that: (1) the USGS generally concurs with Southern California Edison Company and its consultants on the history of the Cristianitos fault and its being capped by 125,000 y.B.P. terraces; (2) the Cristianitos fault is one of several faults in an offshore zone of deformation, the Cristianitos Zone of Deformation (CZD) of Morris (80-2); and (3) there is a lack of potential for movement on the Cristianitos fault in response to displacement on the offshore zone of deformation; and (4) the Cristianitos fault is not a capable fault. This review also contains a discussion of the slip-rate versus magnitude study used for estimating the maximum earthquake in the seismic design of SONGS, Units 2 and 3. The USGS expresses an opinion that the maximum earthquake limit (MEL) line should be steeper, i.e., larger magnitude earthquakes for small slip-rates.

80-2 Morris, R.H., August 13, 1980, Letter from the USGS to the NRC reviewing offshore seismic reflection profiles in vicinity of the Cristianitos fault, San Onofre, California, a study by H.G. Green (USGS) and M.P. Kennedy (CDMG): in USNRC Safety Evaluation Report, 1980, Appendix F, p. Fl to F23. (80-4)

68

Summarizes the results of a study to determine the seaward extension and structural relationships of the Cristianitos Zone of Deformation (CZD) and the Offshore Zone of Deformation (OZD) seismic-reflection data. Con­ cludes that a structurally deformed zone of en echelon folds and faults extends south-to-southeastward offshore from SONGS along the expected CZD trend to within 1 km of the OZD where a data gap prevents positive connec­ tion between the two zones of deformation. No evidence of seafloor dis­ placement was found on the CZD, but a probable Neogene age of deformation is postulated.

80-3 Slemmons, D.B., November 5, 1980, Letter to Nuclear Regula­ tory Commission on SONGS seismic design parameters: in USNRC Safety Evaluation Report, 1980, Appendix E, p. El to E28. (80-4)

Findings of a review of the Offshore Zone of Deformation (OZD) and its probable maximum earthquake including an analysis of fault capability, rate of slip, rupture length, displacement, degree of deformation, maximum historic earthquake, and maximum surface displacement. Concludes that a maximum earthquake of Ms 7 with a slip rate of 0.5 mm/yr should be used for characterizing the OZD in the design of SONGS, Units 2 and 3.

80-4 United States Nuclear Regulatory Commission, December 1980, Safety Evaluation Report (Geology and Seismology), Related to the Operation of San Onofre Nuclear Generating Station, Units 2 and 3, Docket Nos. 50-361 and 50-362, 34 p.

Summarizes findings originally published by the Atomic Energy Commis­ sion in a 1972 Safety Evaluation Report for SONGS Units 2 and 3 with the addition of a review of new data from investigations since that time. The report concludes that the new data have not changed the basic 1972 conclu­ sion that a Safe Shutdown Earthquake of 0.67g should be used for SONGS Units 2 and 3. Appendices include: a letter from D. B. Slemmons to the NRC (80-3) evaluating the seismotectonic setting and reviewing methods of estimating the maximum earthquake on the Offshore Zone of Deformation; a letter (with addendum) from R. H. Morris (USGS) to the NRC (80-2) reviewing offshore seismic-reflection profiles in the vicinity of the Cristianitos fault; and a letter from H. W. Menard (USGS) to the NRC (80-1) that is an addendum to the earlier Morris letter.

80-5 Greene, H.G., and Kennedy, M.P., 1980, Addendum to: Review ofoffshore seismic reflection profiles in the vicinity of the Cristianitos fault, San Onofre, California: in USNRC Safety Evaluation Report, 1980, Appendix G, p. Gl to Gil. (80-4)

Letter supplementing a previous USGS report (Morris, 80-2) that re­ viewed earlier offshore seismic profiles for the NRC. This letter reviews new seismic profiles. These new data (June 1980 by NEKTON, Inc.) include about 90 km of high-resolution watergun and 3.5 kHz seismic reflection profiles and side-scan sonographs. The new data support the previous conclusions (Morris, 80-2) that the Cristianitos Zone of Deformation (CZD) merges with or is truncated by the Offshore Zone of Deformation (OZD)

69

offshore from SONGS, and that the CZD faults cut shallow strata that lie beneath a prominent unconformity and younger poorly stratified sediments.

80-6 Woodward-Clyde Consultants, 1980, Summary report on basic data from two onshore and six offshore geologic borings, SONGS Units 2 and 3, San Onofre, Consultant's Report for Southern California Edison Co., 10 p. and appendices.

Presents the location, methods, boring/geophysical logs, and age dat­ ing results of two onshore rotary and six offshore vibratory-core borings near SONGS. The onshore borings reached depths of 557 and 750 feet with sampling of the terrace deposits, San Mateo Formation; Monterey Formation, and San Onofre Breccia. The offshore vibratory cores recovered up to 47 feet of ocean bottom sediments.

Nannofossil analysis was performed on four samples taken from the 485 to 654 foot interval of the onshore borings. Nannofossil ages of middle Miocene, Luisian (650 feet) to late Miocene, top of lower Mohnian (485 feet) were determined. Seven radiometric age dates were determined from shells and organic material recovered in the offshore sampling. These ages ranged from 12,270 ± 340 years at 38.5 feet to 8,510 _+ 265 years at 16.4 feet of sediment depth.

70

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72-1 Fugro, Inc., November 14, 1972, Geologic and Seismic Reconnaissance of the Eastern Mojave Desert and Proposed Nuclear Power Plant Sites, California, 25 p.

Presents the general geologic and seismologic characteristics of the eastern Mojave Desert as related to three alternate locations for the Vidal Nuclear Power Plant: (1) Vidal, Sec. 16, TIN, R24E, (2) Chemehuevi, Sec. 36, TAN, R23E, and (3) Needles, Sees. 9, 16, & 17, TIN, R23E. The report describes regional geology and lithology, Cenozoic sedimentary and alluvial units, and the seismic history of major faults within 130 miles of the sites. A high density of recorded seismicity is shown to have occurred west of a line extending from Baker to Blythe, California, about 50 miles west of the sites. The eastern Mojave Desert is typified by a low density of recorded seismicity with no earthquakes of M 4.0 or greater. The strongest intensity of historic ground shaking for the sites is estimated at V-VI (Modified Mercalli Scale). Three reconnaissance geologic maps, various scales, show the alluvial units of the areas surrounding the pro­ posed sites.

73-1 Davis, G.C., 1973, Woodward-McNeill and Associates, Geologic studies in the eastern Mojave Desert: in Southern California Edison, 1974b, Information Concerning Site Characteristics, Vidal Nuclear Generating Station, Units 1 and 2 (74-3), Volume III, Appendix 2.5A, 15 p.

Summarizes evidence or lack of evidence for extending the active, strike-slip Death Valley fault zone southeastward from the Silver Lake area to the Rice-Vidal-Blythe area. Included is a discussion of faults in the Silver Lake area, Soda-Avawatz Mountains, Bristol Mountains, Granite-Old Dad Mountains, Kilbeck Hills-Old Woman Mountains and Riverside-Big Maria- Little Maria Mountains.

Concludes there is no evidence to support an hypothesis extending the Death Valley fault zone 150 miles to the Rice-Vidal-Blythe area. This report was originally presented in the Vidal Early Site Review Report by Woodward-McNeill (74-4) and in the report by Southern California Edison (74-2).

73-2 Fugro, Inc., January 22, 1973, Reconnaissance Subsurface Investi­ gation, Proposed Vidal Site and Vicinity, Eastern Mojave Desert, 28 p.

A reconnaissance subsurface investigation of the Vidal site undertaken to determine evidence for the presence or absence of faults beneath the site and general site soil conditions. The 27 borings were placed in and around Sec. 16, TIN, R24E and drilled through the Pliocene Bouse Formation and into the Miocene Osborne Formation to depths between 137 and 566 feet. Trenches were placed across suspected surface fault traces located in Sees. 10 & 12, TIN, R24E, and Sec. 20, TIN, R25E, about 1 to 3 miles from the site. The report concludes (1) the Bouse Formation and Osborne Formation are continuous beneath the site with no evidence for faulting, (2) the Bouse-Osborne contact slopes southerly at a gradient of 4 percent, (3) the

74

northwest-trending fault, whose nearest location is 3-1/4 miles northeast of the site, displaces Miocene Copper Basin Formation and Pliocene Bouse Formation, but not Quaternary units, (A) the lack of evidence suggests that near-site faulting need not be considered in site design, (5) regional seismic and historic geology suggest a Safe Shutdown Earthquake need not exceed O.AOg.

74-1 Bull, W.B., 1974, Woodward-McNeill and Associates, Geomorphic tectonic analysis of the Vidal region: in Southern California Edison, 1974b, Information Concerning Site Characteristics, Vidal Nuclear Gener­ ating Station, Units 1 and 2 (74-3), Volume III, Appendix 2.5B, 63 p.

Geomorphic study to evaluate possible Quaternary faulting within 5 miles of the Vidal site and to assess the regional Quaternary tectonic stability of the mountain fronts within 20 miles of the site.

Describes six sequences of Quaternary alluvial units ranging in age from 1.5 million years to the present and three types of tectonic regimes: (1) base-level fall in alluvium associated with tectonic and nontectonic mechanisms; (2) accumulation of the Bouse Formation sediments and overlying terrace deposits in response to regional uplift and tilting; and (3) evolu­ tion of fluvial systems crossing the mountain fronts.

Conclusions presented are: (1) three zones of base-level fall exist near the Vidal site, one of which occurred from 11,000 to 50,000 years ago and was caused by lateral cutting by the Colorado River; the others occurred before 500,000 years ago and are of uncertain origin; (2) regional uplift of 530 to 800 feet with regional tilting of 10 feet per mile has occurred near Vidal since completion of Bouse Formation deposition (greater than 3 million years ago); (3) mountain fronts in the Vidal region are not tectonically active; and (4) there is no geomorphic evidence of faulting, folding, or tilting during the last 500,000 years within a 20-mile radius of Vidal.

Contains eight tables and 35 figures. The report was originally presented in the Early Site Review Report by Woodward-McNeill (74-4) and can also be found in Volume II of Southern California Edison (74-2). There is an attachment in the Southern California Edison report (74-3) discussing strike-slip fault movement along a postulated fault near Savahia Peak. This attachment concludes that strike-slip movement along the postulated fault has not occurred during the last one million years.

74-2 Southern California Edison Co., 1974a, Information ConcerningGeology and Seismology, Vidal Nuclear Generating Station, Units 1 and 2, 3 volumes.

Represents an updated Early Site Review Report (ESRR) by Woodward- McNeill and Associates (74-4). This report was submitted to the USNRC to provide geologic and seismologic information supporting the adequacy of the Safe Shutdown Earthquake. Discusses regional and site geology, vibratory ground motion and potential for surface faulting. Six appendices are contained in Volume II and III. See the ESRR (74-4) for a more detailed annotation.

75

74-3 Southern California Edison Co., 1974b, Information Concerning Site Characteristics, Vidal Nuclear Generating Station, Units 1 and 2, 5 volumes.

Report submitted to the USNRC and ACRS to demonstrate the accepta­ bility of the design acceleration for the Vidal Safe Shutdown Earth­ quake (SSE). Subjects covered in this report include: (1) geography and demography; (2) meteorology; (3) hydrology; (4) geology and seismology; and (5) seismic design. Volume I contains parts (1) to (3) listed above. Volumes II and III contain geology, seismology, and seismic design. Vol­ umes III, IV and V contain appendices which include reports by consultants and AEC questions with SCE reponses. The geologic and seismologic discus­ sions are expansions of the Early Site Review Report by Woodward-McNeill (74-4) and Southern California Edison (74-2).

The report states that the eastern Mojave Desert Province containing the Vidal site has a relatively low level of historic seismicity. The maximum reported earthquake for the Province had an epicentral intensity of V (Modified Mercalli Scale) and the largest recorded earthquake had a magnitude of 3.3.

The SSE for the Vidal site is represented by an AEC Regulatory Guide 1.60 spectrum normalized to 0.40g. This is a conservative estimate based on analysis of known historic earthquakes and fault-length vs. maximum- magnitude relationships. The SSE was developed assuming that the maximum historic earthquake would occur at the site. The San Andreas fault is 90 miles west of the site and was calculated to be capable of causing maximum ground acceleration at the site of O.lOg.

74-4 Woodward-McNeill and Associates, 1974a, Early Site Review Report for Vidal Nuclear Generating Station, Units 1 and 2, 3 volumes, 130 p.

Discusses in detail various aspects of geology, seismology, and foun­ dation engineering for the proposed Vidal Nuclear Plant site about 10 miles west of Parker, Arizona. The scope of study for this report included: (1) literature review, (2) aerial photo interpretation, (3) near-site geologic investigations, (4) age-dating of selected igneous rock units, (5) fault and lineament mapping with trenching, (6) surface (magnetic and gravity anomaly) and subsurface (borehole and seismic refraction) geophysical sur­ veys, (7) site-specific soils investigations (106 borings), and (8) labora­ tory testing of soil samples.

The report includes detailed discussions of the historic earthquakes of the Mojave Desert, identification of all capable faults, estimates of the maximum earthquake to affect the site, and a discussion of the Safe Shutdown Earthquake (SSE) and Operating Basis Earthquake (OBE).

Based on magnitude-intensity/acceleration relationships, the study identified 22 faults located in the Mojave Desert capable of generating an earthquake that will affect the site. The maximum earthquake in the near- site area is postulated not to exceed M 5.5. A maximum ground acceleration of 0.40g is recommended for the SSE and an acceleration of 0.20g is recommended for the OBE.

76

74-5 Woodward-McNeill and Associates, 1974b, Geophysical surveys: in Southern California Edison Co., 1974b, Information Concerning Site Characteristics, Vidal Nuclear Generating Station, Units 1 and 2 (74-3), Volume III, Appendix 2.5C, 14 p.

Summarizes the procedures and conclusions of various geophysical sur­ veys conducted at the Vidal site. Geophysical surveys included: (1) ground magnetic; (2) gravity with Bouguer data reduction; (3) 12-channel seismic refraction; (4) downhole geophysical logging; and (5) crosshole shear-wave velocity measurements. The surveys were conducted to determine lateral correlation of boring data and geophysical parameters of the subsurface materials. The surveys indicate no major faulting beneath the Vidal site.

74-6 Woodward-McNeill and Associates, 1974c, Boring and test pits,static properties laboratory investigation, dynamic properties laboratory investigation: in Southern California Edison Co., 1974b, Information Concerning Site Characteristics, Vidal Nuclear Generating Station, Units 1 and 2 (74-3), Volume IV, Appendix 2.5D.

Compilation of the Vidal site boring and test pit logs and laboratory test results for a total of 106 borings and six test pits. The logs for the 27 borings drilled by Fugro, Inc.(73-2) are included.

74-7a-g Woodward-McNeill and Associates, 1974d, Geologic investigations of postulated extensions of the Pinto Mountain and Death Valley fault zones, eastern Mojave Desert: in Southern California Edison Co., 1974b, Information Concerning Site Characteristics, Vidal Nuclear Gener­ ating Station, Units 1 and 2 (74-3), Volume V, Appendix 2.5E, 49 p.

Summarizes geologic field investigations conducted in selected areas along postulated extensions of the Death Valley, Pinto Mountain, and Blue Cut faults. Conclusions are: (1) postulated extensions of the Death Valley and Pinto Mountain faults do not exist; (2) the Blue Cut fault is displaced by the northwest-trending Sheep Hole fault and does not extend eastward into the Eagle Mountains; and (3) these three faults are not a hazard to the Vidal plant. The report presents 27 figures, mostly geologic maps of selected local areas.

74-8 Woodward-McNeill and Associates, 1974e, Geologic studies of the hypothesized Pinto Mountain fault zone extension: in Southern Calif- fornia Edison Co., 1974b, Information Concerning Site Characteristics, Vidal Nuclear Generating Station, Units 1 and 2 (74-3), Volume V, Appendix 2.5E, Attachment B, 7 p.

Geologic studies along the eastern Pinto Mountain fault zone and its hypothesized eastward extension. The Pinto Mountain fault is an east- westerly oriented left-lateral strike-slip fault in an area of moderate seismicity with earthquakes up to M 5.0, but with no known recent surface rupture. The Pinto Mountain fault truncates the Mesquite fault, which is known to offset Quaternary sediments, and is therefore considered to be

77

more recent. Although the Pinto Mountain fault can be traced 12 miles east of Twentynine Palms to the Tendertrap fault in Humbug Mountain, no evidence could be found for extending the Pinto Mountain fault farther to the east.

74-9 Davis, G.C., 1974, Geologic studies of the hypothesized Death Valley fault zone: in Southern California Edison Co., 1974b, Information Concerning Site Characteristics, Vidal Nuclear Generating Station, Units 1 and 2 (74-3), Volume V, Appendix 2.5E, Attachment A, 17 p.

Study of two northwest-trending physiographic lineaments in the Mojave Desert to evaluate whether they were caused by throughgoing structures hypothesized to be extensions of the Death Valley fault zone. The report discusses the faults of the Silver Lake-Halloran Hills, Soda Mountains, Bristol-Old Dad-Granite Mountain, Riverside-Big Maria-Arica Mountain areas and how these faults relate to the hypothesized extension of the Death Valley fault zone. Conclusions of the study are: (1) the amount of right- lateral displacement along the Death Valley fault zone near the Garlock fault is about 8 km; (2) the Death Valley fault zone probably terminates in the Silver Lake-Baker area; (3) the Death Valley fault zone and Avawatz fault zone are not correlative; and (4) it is possible that the Avawatz fault zone extends southward as far as the Bristol Mountains. The report is an attachment to a larger regional study performed by Woodward-McNeill and Associates (74-7a-g).

74-10 Woodward-McNeill and Associates, 1974f, Earthquake epicenter data: in Southern California Edison Co., 1974b, Information Con­ cerning Site Characteristics, Vidal Nuclear Generating Station, Units 1 and 2 (74-3), Volume V, Appendix 2.5F, 49 p.

Computer printout listing earthquake epicenters for the periods 1902 to 1944 and January 1945 to May 1973. Epicenters are plotted on reduced topographic base maps of the Trona, Kingman, Williams, San Bernardino, Needles, Prescott, Santa Ana, Salton Sea, and Phoenix USGS 2° sheets. This report is also in the Early Site Review Report for the Vidal site by Woodward-McNeill and Asociates (74-4) and the report by Southern California Edison (74-2).

75-1 Ku, Teh-Lung, 1975, Th230/U234 dating of arid zone soil carbon­ ates: in Southern California Edison Co., 1974b, Information Con­ cerning Site Characteristics, Vidal Nuclear Generating Station, Units 1 and 2 (74-3), Volume V, Appendix 2.5G, Section B, 12 p.

Report summarizing the methodology and results of an age-measurement study using uranium series isotopes on authigenic carbonate (caliche) from paleosols of the Vidal region.

78

75-2 Long, A., 1975, Carbon-24 dating of arid soil carbonates: in Southern California Edison Co., 1974b, Information Concerning Site Characteristics, Vidal Nuclear Generating Station, Units 1 and 2, (74-3), Volume V, Appendix 2.5G, Section C, 2 p.

Letter presenting the results of a Carbon-14 age dating study from paleosols in the Vidal region. The results of this study indicate that the unit "Q3" is Holocene and the other units are Pleistocene in age, i.e., 20,000 years or older.

75-3 United States Nuclear Regulatory Commission, 1975, Limited Early Site Review for the Vidal Nuclear Generating Station, Project No. 486, 31 p.

Evaluates the suitability of the Vidal Nuclear Plant site and presents a brief summary of site-planning history, site characteristics, and design criteria. Conclusions are: (1) there are no known geologic hazards pres­ ent at the Vidal site which would preclude its use as a nuclear reactor station; (2) the proposed 0.40g acceleration for the Safe Shutdown Earth­ quake and the 0.20g acceleration for the Operating Basis Earthquake are adequately conservative and acceptable; and (3) the seismic input criteria established by Southern California Edison Company are acceptable for the early site review.

75-4a-e Woodward-Clyde Consultants, 1975, Supplemental geologic in­ vestigations: in Southern California Edison Co., 1974b, Information Concerning Site Characteristics, Vidal Nuclear Generating Station, Units 1 and 2 (74-3), Volume V, Appendix 2.5K, 15 p.

Describes trenching and geologic mapping to investigate lineaments and faults near the Vidal site. The geologic mapping program included recon­ naissance mapping of faults within the southwestern Riverside Mountains, western Arizona, and the Buckskin-eastern Whipple Mountain areas.

The report concludes that: (1) lineaments along the Colorado River are remnant river-cut terraces; (2) in the southwestern Riverside Moun­ tains, three of the previously mapped faults are old and do not extend beyond the area, and two faults proposed by others do not exist; (3) photogeologic studies of western Arizona indicate no evidence of capable faults within 25 miles of the Vidal site; and (4) in the Buckskin-eastern Whipple Mountains several northwest-trending faults exist, but no evidence was found to indicate they are capable faults. Trench logs and geologic maps (scales 1:24,000 and 1:40,000) accompany the report.

75-5 Woodward-McNeill and Associates, 1975a, Age dating of LateTertiary and Quaternary deposits Vidal HTGR site: in Southern Cali­ fornia Edison, 1974b, Information Concerning Site Characteristics, Vidal Nuclear Generating Station, Units 1 and 2 (74-3), Volume V, Appendix 2.5G, Section A, 17 p.

The first part of a three-part report of an age-dating study in the

79

region around the Vidal site to gain absolute and/or relative ages for six alluvial sequences that surround the Vidal region. The geochronological techniques used in the study included: (1) paleomagnetic polar reversals; (2) carbon 14; (3) potassium-argon; and (A) uranium-ionium. The first section of the report summarizes the age dates, while the last two sections contain reports by consultants Ku (1975) and Long (1975).

75-6 Woodward-McNeill and Associates, 1975b, Photogeologic and recon­ naissance mapping of the Castle Rock, Mopah and Whipple Mountain front: in Southern California Edison Co., 197Ab, Information Concerning Site Characteristics, Vidal Nuclear Generating Station, Units 1 and 2 (7A-3), Volume V, Appendix 2.51, 15 p.

Study of faulting along the southern Whipple Mountains and the eastern Mopah Range-Turtle Mountain areas using photogeologic mapping, site over­ flights, and limited surface investigations. Conclusions are: (1) the Castle Rock fault is not a major throughgoing fault and does not displace alluvial units; (2) faulting west of Castle Rock has not displaced an over­ lying alluvial unit whose age is estimated to be between 50,000 and 200,000 years B.P.; (3) faults in the Mopah Range offset Tertiary volcanic units but not alluvial units; and (A) faulting in the Whipple Mountain-Savahia Peak area is related to pre-Osborne Formation gravity sliding which oc­ curred between 13.5 and 19-21 million years B.P. Three reconnaissance geologic maps are presented (scale 1:2A,000).

75-7 Woodward-McNeill and Associates, 1975c, Relationship of theBouse and Osborne formations in the vicinity of the Vidal Nuclear Gener­ ating Station site: in Southern California Edison Co., 197Ab, Infor­ mation Concerning Site Characteristics (74-3), Volume V, Appendix 2.5J, 5 p.

Stratigraphic relationships of the Bouse and Osborne Formations and their overlying alluvial units north and east of the Vidal site. This study consisted of geologic field mapping and analyzing subsurface borings to trace a known basal marl of the Bouse Formation. The results of this study indicate that: (1) the basal marl of the Bouse Formation can be extended from Earp, California, to about 3 miles east of the site, and then to the northeast; (2) the consistent outcrop pattern and gentle dip of the marl confirms that the Bouse Formation was deposited on a terrain similar to that of the present day; and (3) no evidence of fault offset in the basal marl between the site and Earp was found. A geologic map (scale 1:37,000>+) with cross sections, electric logs, and three boring logs are included with the report.

80

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SUNDESERT NUCLEAR POWER PLANT SITE (Fig. 7)

75-1 Fritts, P.J., 1975, Micropaleontology, Sundesert Nuclear Plant, early site review report: in the SNP-PSAR, Volume 4, Appendix 2.5E of Appendix A. (75-11)

Microfossil identification of samples from drillholes and outcrops at and near the Sundesert Nuclear Project (SNP) site. The report discusses primarily the Bouse Formation, its environment of deposition, age, and correlation with the middle-to-upper portions of the mid-to-late Pliocene Imperial Formation at Fish Creek. The age of the Bouse Formation is placed at late Pliocene. Fossil-logs for ten drillholes and 15 trenches or out­ crop samples are given.

75-2 Fugro, Inc., 1975a, Age dating techniques, Sundesert Nuclear Plant, early site review report: in the SNP-PSAR, Volume 5, Appendix 2.5J of Appendix A. (77-3)

Results from 28 age-dated samples collected in the lower Colorado River area to establish site geochronology. Dating methods included: (1) K/Ar; (2) radiocarbon; (3) amino-acid racemization; and (4) U/Th. Eight vertebrate fossils from the "Qrd" deposits were dated using amino-acid techniques. Five samples of pedogenic caliche taken from the SNP site were analyzed.

Addenda to the report include work by L.M. Mayer of Dartmouth College, who dated a fault gouge sample, J.L. Bada of Scripps Institute of Ocean­ ography, who performed amino-acid racemization dating of a mammoth bone and several vertebrate samples; and Teh-Lung Ku of the University of Southern California, who performed U/Th age dating on caliche samples and a mammoth tusk.

75-3 Fugro, Inc., 1975b, Geotechnical Investigation, Parker Valley Alternate Site, Sundesert Nuclear Project, 2 volumes, 104 p.

Geologic and foundation engineering studies undertaken to locate a viable alternate site for the Sundesert Nuclear Project. The alternate site is located in Parker Valley approximately 15 miles south of Parker, Arizona, and about 42 miles northeast of the Blythe SNP site. The investi­ gation included: (1) literature search; (2) aerial and remote-sensing mapping; (3) limited geologic mapping within a 25-mile radius of the site; (4) gravity, magnetic and downhole-seismic geophysical surveys; (5) excava­ tion of 30 backhoe trenches and 48 borings; (6) age dating of surrounding rock units, caliche and fossils; (7) paleomagnetic polarity determinations for sediments; (8) soils engineering laboratory testing; and (9) reconais- sance groundwater studies.

Quaternary age deposits are offset southwest of the Big Maria Moun­ tains in the "Blythe Graben." Trenching of the graben-bounding faults indicates the 4 to 10 feet of vertical offset in old-to-intermediate-age alluvial fans. The report references the Early Site Review Report by San Diego Gas and Electric Company (75-11) for complete details on the "Blythe Graben."

84

Several aerial photolineaments and stratigraphic discontinuities were studied in the vicinity of the Parker Valley site. Subsurface investiga­ tions indicate that these features are localized and related to landslid- ing, consolidation, or differential erosion, and not to tectonic faulting. A regional seismicity study indicates there are 34 Quaternary faults within a 200-mile radius of the site. The faults thought to be capable of produc­ ing ground motion at the Parker Valley site are: (1) San Andreas (M 8.5); (2) Blythe Graben (M 5.0); (3) Chemehuevi Graben (M 5.5); (4) Kofa Mountain (M 5.5); and (5) Sheep Hole (M 7.0).

The Safe Shutdown Earthquake (SSE) recommended for the Parker Valley site is a Richter magnitude 8.5 on the San Andreas fault 81 miles to the southwest. The Parker Valley site response spectrum is based on a level of ground shaking scaled to 0.20g.

Besides the fault and seismic hazard studies, the report contains descriptions of the general geology of the site and vicinity, site ground- water, regional stratigraphy, and site foundation engineering properties. The report contains five tables, 48 figures, and five appendices (contained in Volume 2). Independent consultant reports are contained in Volume 2 and a supplemental gravity study (Fugro, 76-5) is in Volume 3.

75-4 Hughes, J., and Gauthier, J., 1975, Gravity and magnetic survey, Sundesert Nuclear Plant, Early Site Review Report: in the SNP-PSAR, Volume 5, Appendix 2.51 of Appendix A. (77-3)

Gravity and magnetic survey of the area surrounding the SNP site to detect any linear anomalies that might indicate bedrock faulting. No steep gravity or magnetic gradients were observed. The report contains 18 fig­ ures, several location maps, Bouguer and residual gravity maps, a total magnetic intensity map, and ten profiles.

75-5 Hughes, J.B., and Hennon. T.D., 1975, Gravity and magnetic survey of the Parker Valley alternate site: in Fugro, 1975, Geotechnical Investigation, Parker Valley Alternate Site, SNP, Volume 2, Appendix C, 12 p. (75-3)

Detailed study of the gravity and magnetic fields of the Parker Valley Alternate Site and the surrounding area. An elongated gravity and bedrock low (Fig. B) may be the result of a fault dipping 35° and striking east westerly along the northern boundary of the site. Displacement of 500 feet, down on the south, is indicated.

The report contains a location map, Bouguer gravity and residual gravity maps, a total magnetic intensity map, a bedrock elevation map, and nine cross sections. The report was supplemented by an additional gravity study reported by Fugro (76-5).

85

75-6 Kukla, G.J., and Opdyke, N., 1975, Paleomagnetic analysis of sediments at the Parker Valley Alternate Site: in Fugro (75-3), Geotechnical Investigation, Parker Valley Alternate Site, SNP, Volume 2, Appendix B, 17 p.

Remnant paleomagnetic determinations for 36 samples taken from two drillholes at the Parker Valley Alternate Site. Older fluvial deposits (QTrb) underlying the site are reversely magnetic from the ground surface to the sampled depth of 264 feet and are, therefore, older than the Brunes paleomagnetic epoch (700,000 years).

75-7 Lee, GvJC., and Bell, J.W., 1975, Depositional and geomorphic history of the lower Colorado River, Sundesert Nuclear Plant Early Site Review Report: in the SNP-PSAR, Volume 3, Appendix 2.5D of Appendix A, 19 p. (77-3)

Regional geomorphic study along the lower Colorado River from Cibola, about 25 miles below Blythe, California, to about 3 miles above Parker, Arizona. The purpose of this study was to obtain information about allu­ vial units that could be used to demonstrate late Cenozoic structural deformation along the lower Colorado River.

The report discusses nine alluvial units that are younger than the late Pliocene Bouse Formation. Based upon present-day elevations of late Cenozoic alluvial units, basin subsidence and regional tilting of the lower Colorado River region took place before the middle Pleistocene. The undis­ turbed elevations of intermediate age fluvial deposits (Qrd-80,000 to 700,000 years old) indicate no recognizable deformation has occurred since late Pleistocene time. There has been some local fault displacement of alluvial units forming narrow grabens on the south side of the Big Maria Mountains, near Blythe, and in the Chemeheuvi Valley, near Needles. These disturbed alluvial units suggest movement on the Blythe graben is younger than 61,000 years with indications of movement throughout the last 100,000 years. The youngest undisturbed unit (Qf) has been determined to be a minimum of 6,000 years old by a uranium-thorium age date. There have been three cycles of downcutting followed by deposition since the end of the Bouse Formation. The present-day river level has agraded about 150 feet since the end of the Pleistocene. A map of the fluvial features is in­ cluded.

75-8 McLamore, Reid, 1975, Seismic refraction survey, Sundesert Nuclear Plant, Early Site Review Report: in SNP-PSAR, Volume 5, Appendix 2.5H of Appendix A, 6 p. (77-3)

Reconnaissance seismic refraction study made in the SNP siting area having a total line-length of 18,000 feet. Three seismic-velocity layers typify the SNP site: (1) a 1,000- to 3,000-fps unit within the upper 10 feet consisting of unconsolidated fluvial sand, gravel and windblown detri­ tus; (2) a middle 3,000- to 6,500-fps unit of consolidated fluvial sand and gravel with the lower part alluvial gravel; and (3) a lower 7,000- to 8,000-fps unit of clay and silt, probably the Bouse Formation. The report contains two seismic refraction profiles.

86

75-9 Opdyke, N., and Kukla, G.J., 1975, Preliminary report on magneto-stratigraphic study of sediments near Elythe, California and Parker Valley, Arizona, Sundesert Nuclear Plant Early Site Review Report: in the SNP-PSAR, Volume 3, Appendix 2.5B of Appendix A, 10 p. (77-3).

Paleomagnetic study of drillhole and outcrop samples of late Cenozoic sediments from the Blythe and Parker Valley areas. The purpose of this study was to determine minimum ages for the sediments and evaluate the potential for using magneto-horizons for correlation of drillhole data in the SNP siting area.

The study concluded that the older fluvial deposits (QTrb) have reverse polarity, are older than 0.7 m.y. B.P., and were possibly deposited in the Gilbert reverse polarity epoch (5.1 to 3.3 m.y.B.P.).

There are also some normal polarity layers which may be used for detailed hole-to-hole correlation. The intermediate-age fluvial deposits (Qrd) have normal polarity and were probably deposited during the Brunhes epoch, less than 0.7 m.y.B.P. However, the lower portion of these "Qrd" sediments may have been deposited during the reverse polarity Matuyama epoch, 2.4 to 0.7 m.y.B.P.

75-10 Orme, A.R., 1975, Photogeologic interpretation of structural lineaments in the lower Colorado Valley and vicinity, in Sundesert Nuclear Plant Early Site Review Report: in the SNP-PSAR, Volume 3, Appendix 2.5-C of Appendix A, 17 p. (77-3)

Regional photogeologic interpretation study of the structural linea­ ments and Quaternary tectonic features of the lower Colorado River between Lake Mead and the Gulf of California using ERTS satellite imagery and color airphotos.

The study concludes that: (1) there is no firm photogeologic evidence for Quaternary tectonism within the Blythe and Parker Valley areas; (2) photogeologic evidence indicates major tectonism within the siting area ceased before deposition of the Bouse Formation in Pliocene time; (3) late Tertiary fanglomerates bounding mountain ranges in the siting area appear to be undisturbed since deposition; (4) photogeologic evidence for Quater­ nary tectonism dies out towards the siting area; and (5) there is no photogeologic evidence for extending the Death Valley fault zone southeast­ ward towards the site vicinity.

Three small scale maps show ERTS lineaments for the entire study area, and a larger scale map shows color photolineaments in the Parker Valley area.

75-11 San Diego Gas and Electric Company, 1975, Early Site Review Report for the Sundesert Nuclear Plant, Units 1 & 2, 6 volumes.

Preliminary study submitted to the NRC and the ACRS to determine the suitability of the proposed Blythe site with respect to: (1) demography and geography; (2) hydrology; and (3) geology and seismology. This report was later made a part of a more complete study, the Preliminary Safety Analysis Report (PSAR).

87

Sections of the report of geologic interest are: (1) Section 2.4, Hydrologic Engineering; (2) Section 2.5, Geology and Seismology; (3) Sec­ tion 3.7.1, Seismic Input; and (4) Section 1.6A, Responses to NRC Ques­ tions.

Faults deemed capable of seismic activity were used in the analysis of the Safe Shutdown Earthquake (SSE) and are discussed in Section 2.5.2-8 and graphically presented in Fig. 2.5-49. The SSE was chosen to be a seismic event of magnitude 8.5 located 35 miles west of the SNP site. This corres­ ponds to the nearest approach of the Sand Hill fault, which is assumed to be a part of the San Andreas system.

The report contains nine tables and 93 figures.

75-12 Summers, K.V., Castleberry, J.S., and Crosby, J.W. Ill, 1975, Geophysical downhole investigation: in Fugro, 1975, Geotechnical Investigation, Parker Valley Alternate Site, SNP, Volume 3, Appendix 2.5A of Appendix A, 8 p. (75-3)

Results of downhole geophysical logging of boreholes at the Parker Valley Alternate Site for the Sundesert Nuclear Project. Natural gamma, neutron-epithermal neutron, neutron-gamma, and gamma-gamma logs were ob­ tained for all of the borings, with spontaneous potential and resistivity for most borings. Three main geophysical units and five subunits used for cross-borehole correlation are described. Four of the unit/subunits are good correlating horizons and have no abrupt changes in elevation. The report contains 39 figures, mostly suites of logs and correlation sections.

76-1 Biehler, S.,1976, Interpretation of regional and local gravityand aeromagnetic data, Sundesert Nuclear Plant, Early Site Review Report, in the SNP-PSAR, Volume 5, Appendix 2.5K of Appendix A, 9 p. (75-11)

Results of regional (within a 35-mile radius) and local (within a 15- mile radius) gravity studies, and a regional aeromagnetic study for the SNP site to identify major subsurface faults. The regional Bouguer anomaly map encompasses the entire Salton Sea and El Centro 2° topographic map sheets (scale 1:250,000) and was contoured at a 5 milligal interval. Reg­ ional gravity trends of the Salton Trough, the Transverse Ranges, and the Sonoran Desert are discussed. The local Bouguer anomaly study was con­ toured at a 2 milligal interval.

A zone of steep gravity gradients greater than 10 milligal/mile indi­ cates that faults bound the northeast and southwest sides of McCoy Moun­ tains and the northwest side of Mule Mountains northwest of the SNP site. The gravity data also indicate a deep, 4,500 to 9,000 foot, northwest- trending graben extending northwestward from Blythe along McCoy Wash. The aeromagnetic study indicates a general northwest-southeast trend in the anomaly patterns. Only a slight east-west structure is indicated along the Chiriaco fault by the aeromagnetics, but the anomaly does not extend to Blythe.

The report contains four figures, three anomaly maps and a gravity profile extending from the McCoy Mountains northeastward to the Big Maria Mountains.

88

76-2 Bull, W.B., 1976, Tectonic geomorphology of the Sundesert Nuclear Plant Site region, Early Site Review Report: in the SNP-PSAR, Volume 6, Appendix 2.50 of Appendix A, 28 p. (75-11)

Geomorphic study analyzing the Quaternary tectonic activity of the mountain fronts and mountain-bounding faults that occur from southwestern Arizona to the Salton Trough. The mountain fronts and selected faults are classified into one of three types of tectonic activity: (1) active; (2) slightly active; or (3) inactive, based upon the relative rates of activity of four geomorphic processes. The geomorphic processes include: (1) uplift; (2) channel downcutting; (3) piedmont deposition; and (A) piedmont erosion. In addition, the following characteristics are used to classify the relative tectonic activity of the mountain fronts: (1) basin alluvium;(2) areal features of the mountain fronts (i.e., asymmetry of the ranges);(3) sinuosity of the mountain fronts (perimeter of the mountains/overall length); and (A) valley morphology (rate of stream valley narrowing above mountain front, valley-floor width/valley-height ratio, and valley- width/valley-height ratio). The faults classified as active by this scheme include the Blue Cut and Eagle Mountain Mine faults, which bound Eagle Mountain on the north and southeast, respectively. Other faults such as the Clemens Well, Salton Creek, Chiriaco, and Sheep Hole are classified as inactive.

The study concludes that the region surrounding the SNP site is tectonically inactive, characterized by a lack of major faulting during the Quaternary, except for minor faulting in the Blythe Graben. The report contains three tables and 23 figures.

76-3 Crowell, J.C., and Crowe, B.M., 1976, The tectonic history of southeasternmost California, Sundesert Nuclear Plant Early Site Review Report: in the SNP-PSAR, Volume 6, Appendix 2.5N of Appendix A, 39 p. (75-11)

Tectonic history of the region surrounding the SNP site, with special emphasis on Quaternary events. The tectonic history is divided into: (1) pre-late Mesozoic events; (2) late Mesozoic thrusting; (3) Transverse- Ranges structures; (A) Basin-Range structure; (5) San Andreas fault-Salton Trough system; and (6) minor tectonic features.

The study concludes that active faults of the San Andreas-Salton Trough lie no closer than AO miles to the Sundesert site. Strong active displacement on the San Andreas ends in the vicinity of Niland, where tectonic displacement sidesteps along a spreading center to the Imperial fault. Dip-slip faults subparalleling the Salton Trough and the San An­ dreas fault within the Chocolate Mountains are related to widening of the trough rather than to transform faulting.

76-4 Fugro, Inc., 1976a, Report of 1852 Fort Yuma earthquake, Sundesert Nuclear Plant, Early Site Review Report: in SNP-PSAR, Volume 6, Appendix 2.5P of Appendix A, Al p. (75-11)

A review of previously published reports and a compilation and analy­ sis of the original accounts of the 1852 Fort Yuma earthquake. Documented

89

are the exact date of the earthquake and strong evidence for the epicenter location. The report concludes that: (1) the Fort Yuma earthquake occurred on November 29, 1852 at approximately noon; (2) the epicenter was located in the Salton Trough, probably 25 to 50 miles southwest of Yuma, Arizona; and (3) the magnitude of the event is estimated to have been between 6 and 7.

The report includes six figures and one table. The figures include a chronology of reports, the 1852 geographic setting, locations of the earth­ quake effects, a generalized fault map, and an earthquake epicenter loca­ tion map. The table is a comparison chart of the effects of earthquakes in the Imperial Valley-Colorado Delta area.

76-5 Fugro, Inc., 1976b, Supplemental gravity survey, Parker Valley Alternate Site, Sundesert Nuclear Project: in Fugro, 1975, Geotech- nical Investigation, Parker Valley Alternate Site, SNP, Volume 3, 7 p. (75-3)

Geophysical study (Fugro, 75-3) of a "linear tightening" of the bedrock gravity contours which were previously (Fugro,75-3) interpreted to represent a possible fault. The additional gravity data indicate that the previously reported east-west gravity lineation cannot now be interpreted as a fault; this is due to a reduction in the steepness of the gravity gradient and to a lack of alignment between the surrounding bedrock faults and the gravity lineaments.

The report contains 11 figures, a location map, Bouguer gravity and residual gravity maps, a bedrock elevation map, and seven cross sections.

76-6 Murray, K., Bell, J., and Crowe, B., 1976, Stratigraphy and struc­ ture of the Orocopia, Chocolate and Cargo Muchacho Mountains, south­ eastern California, Sundesert Nuclear Plant, Early Site Review Report: in the SNP-PSAR, Volume 5, Appendix 2.5L of Appendix A, 32 p. (77-3)

Results of a detailed geologic investigation to describe the geology and structural features of the region with attention focused on the rela­ tionship between the San Andreas fault system and faults within the moun­ tains. The study incorporates previous work of numerous authors and de­ tailed analyses of LANDSAT and black and white aerial photographs. Ground investigations were concentrated on areas of known or observed faulting.

The report concludes that: (1) the northwest-trending Tertiary and Quaternary faults in the Chocolate Mountains and southeast of the Salton Trough cannot be associated tectonically with the San Andreas fault system; (2) the Clemens Wells fault cannot be traced beyond the Orocopia Mountains, approximately 48 miles from Blythe; (3) the northwest-trending faults in the mountain southeast of Salton Creek are not capable, but those in the alluvial fans on the southwest flank of the mountains may be capable and related to the Salton Trough subsidence; and (4) the Salton Creek fault,38 miles from SNP, is 12 miles long and is considered capable.

The report contains ten figures which include a Mojave-Gila Deserts alluvial units correlation chart, an index of maps, a previous-studies location map, a location map of age-dated samples, stratigraphic columns, and general (1:125,000) and detailed (1:62,500) geologic maps.

90

76-7 Shlemon, R.J., and Purcell, C.W., 1976, Geomorphic reconnais­ sance, southeastern Mojave Desert, California and Arizona, Sundesert Nuclear Plant, Early Site Review Report: in SNP-PSAR, Volume 6, Appendix 2.5M of Appendix A, 28 p. (77-3)

Geomorphic study of the alluvial deposits within a 35-mile radius of the SNP site. The purpose of this study was to map the extent of the alluvium and to determine an approximate age of its various classes. The study concludes that at least three classes of alluvium, and occasionally an older fourth unit, can be delineated.

The alluvium is primarily of Quaternary age, although some may be as old as late Tertiary. Climatic changes probably controlled the regional alluviation, with tectonic pulses superimposed. The effects of "Wisconsin" and possibly the "Illinoian" epochs of pluviality and the criteria used for estimating ages of alluvial units in the southeastern Mojave Desert are discussed.

The report contains 14 figures, a location map, an alluvial deposits map (1:250,000) and 12 photos of various alluvial units.

76-8 Summers, K.V., Castleberry, J.S., and Crosby, J.W., III, 1976,Geophysical downhole investigation, Sundesert Nuclear Plant, Early Site Review Report, in the SNP-PSAR, Volume 3, Appendix 2.5A of Appendix A, 8 p. (77-3)

Interpretations of downhole geophysical logs from the SNP site. Natu­ ral gamma, neutron-epithermal neutron, neutron-gamma, gamma-gamma, and fluid temperature logs were obtained for each drillhole. Spontaneous potential and resistivity logs were taken in selected drillholes. Seven distinctive horizons are defined and discussed in the report. Elevation changes are noted, but no consistent anomalies are evident. The report contains 47 figures, mostly suites of logs and correlation sections.

76-9 Wirth Associates, 1976a, Phase one regional studies, Sundesert Nuclear Project, Transmission System Environmental Study, 360 p.

First report of a two-phase environmental analysis program conducted for the proposed Sundesert Nuclear Project Transmission System and covering most of southern California. The report is divided into seven sections, Section 2 of which contains geotechnical information. The geotechnical section is a 27-page review by Dames and Moore of the environmental impacts associated with construction and operation of the transmission line system. These impacts are: (1) seismic activity; (2) slope stability; (3) erosion potential; (4) sand dune and windblown sand; (5) expansive soils; (6) subsidence, liquefaction, hydrofraction, and soil/rock collapse; (7) flood hazard and debris flow; and (8) rare or unique geologic features. Faults with the greatest potential impact on the proposed transmission lines are the San Andreas, San Jacinto and Elsinore.

Six multicolored geotechnical maps are presented at a scale of 1:1,000,000 along with four tables listing major earthquakes, definitions of sensitivity levels and a final sensitivity analysis.

91

76-10 Wirth Associates, 1976b, Phase two corridor studies, Sundesert Nuclear Project, Transmission System Environmental Study, 360 p.

Second report of a transmission-line corridor study conducted for the proposed Sundesert Nuclear Project. The purpose of these studies was to assess the environmental impact of the construction and operation of the 500 KV transmission lines. The study reviewed in greater detail the corri­ dors identified in Phase 1 (Wirth, 76-9).

Section 2 of the report contains geotechnical data and a discussion of geologic hazards similar to those in the earlier report. The report indi­ cates that the greatest impact on the geologic environment would be from erosion. Northwest-trending faults with a potential impact on the trans­ mission line include: (1) San Andreas system; (2) San Jacinto system; (3) Whittier-Elsfnore fault.

One table of geotechnical hazards and eleven multicolored figures (scale 1:1,000,000) are presented in section 2.

77-1 Crosby, J.W., III, and Smith, B., 1977, Borehole geophysical logs, Sundesert Nuclear Plant, Units 1 & 2; in the SNP-PSAR, Volume 4, Appendix 2.5E, 2 p. (77-3)

The results of a borehole geophysical investigation conducted at the SNP site for Units 1 and 2. Natural gamma, point resistance, spontaneous potential, and caliper logs were obtained. The data from this study were compared to previous borehole geophysical logging studies done at the SNP site (Summers et al., 75-12) and indicated that no fault displacements are evident from data in the borehole logs. The report contains 28 figures, mostly correlation profiles and a complete suite of logs.

77-2 Fugro, Inc., 1977, Foundation Engineering Report, Power Plant Structures, Units 1 and 2, Sundesert Nuclear Project, 80 p.

Results of a site-specific foundation study for the power block of the SNP, Units 1 and 2. This study presents a description of the site's subsurface geologic units and a dynamic analysis of the subsidence and liquefaction potential using four selected earthquakes scaled to the 0.35g Safe Shutdown Earthquake. The report contains ten tables of soils proper­ ties and 75 figures, including eight subsurface profiles.

77-3 San Diego Gas and Electric Co., 1977, Preliminary Safety Analysis Report for the Sundesert Nuclear Power Plant, Units 1 and 2, 23 volumes.

Preliminary engineering and geotechnical report for the siting of a nuclear generating station near Elythe, California. Section 2 of the report contains discussions of: (1) geography - demography; (2) nearby facilities; (3) meteorology; (4) hydrologic engineering; and (5) geology, seismology, and geotechnical engineering. Also included is a six-volume appendix containing the Early Site Review Report (ESRR) by San Diego Gas and Electric Co. (75-11). The ESRR is referred to extensively for the geologic and seismologic discussions.

92

The Safe Shutdown Earthquake (SSE) for the site was selected to be a M 8.5 event on the Sand Hills fault of the San Andreas fault system, 35 miles west of the site. The SSE level of ground shaking was calculated by normalizing the NRC design response spectra to a 0.35g and 0.233g horizon­ tal and vertical acceleration, respectively.

77-4 Wirth Associates, 1977, Devers to Rainbow Studies, Sundesert Nuclear Project Transmissions System Environmental Study, 785 p.

Study of a specific transmission line corridor for the Sundesert Nuclear Project which would extend from the Devers Substation near Desert Hot Springs, California, west through San Gorgonio Pass and thence south­ ward to Rainbow Substation in northern San Diego County.

Section 2 of the report, 39 pages long, is divided into two parts. The first part is a general overview of the environmental conditions, the second an assessment of impact by geotechnical features. The geotechnical hazards evaluated are similar to those discussed in Phase 1 and 2 of the SNP Transmission Line Regional Studies (Wirth, 76-9, 76-10). The impact and seismic hazard from the San Andreas, San Jacinto and Whittier-Elsinore faults are briefly discussed with references to specific sections of the transmission lines.

Ten multicolored figures are included (scale 1:280,000+) which present maps of specific geotechnical hazards, a summary map, and the levels of environmental impact. Three tables summarize the geotechnical features, hazard potential, and impact level.

93

PART III

ANNOTATED BIBLIOGRAPHY OF ENGINEERING GEOLOGY REPORTS PREPAREDTO SATISFY THE ALQUIST-PRIOLO SPECIAL STUDIES ZONES ACT

IN SOUTHERN CALIFORNIA

by

D. L. Lamar and P. J. Scrivner

CONTENTS

PREFACE. ............................. ii

INTRODUCTION ........................... 1

Approach. .......................... 1

Acknowledgments . ..................... 1

ALQUIST-PRIOLO SPECIAL STUDIES ZONES ACT (AP) REPORTS BIBLIOGRAPHY 3

1952 Earthquake Faults, Kern County ............. 8

Garlock and Big Pine Faults, Kern County. .......... 10

San Andreas Fault, Kern County. ............... 10

San Andreas Fault, Los Angeles County ............ 16

San Andreas Fault, San Bernardino County. .......... 35

Mission Creek and Associated Faults, Riverside County .... 46

San Jacinto Fault Zone, San Bernardino County ........ 52

San Jacinto Fault Zone, Riverside County. .......... 58

San Fernando Area Faults, Los Angeles County. ........ 76

Raymond Hill Fault, Los Angeles County. ........... 77

Inglewood-Newport Fault Zone, Los Angeles and Orange Counties 82

Elsinore Fault Zone, Riverside County ............ 98

REFERENCES ............................ 103

111

ILLUSTRATIONS

Page

Fig. 1 Principal faults in southern California covered by Alquist- Priolo Special Studies Zones (Hart, 1980) and outlines of detailed maps. ....................... 2

Fig. 2 Explanation of symbols for detailed maps (Figs. 3-26)showing locations of engineering geology reports ...... 5

Fig. 3 Locations of engineering geology reports along White Wolf and other faults that broke during the 1952 Kern County earthquake ......................... 7

Fig. 4 Locations of engineering geology reports along San Andreas, Big Pine and Garlock faults between Cuddy Valley and Liebre Mountain areas ....................... 7

Fig. 5 Locations of engineering geology reports along San Andreasfault between Lake Hughes and Palmdale areas ........ 12

Fig. 6 Locations of engineering geology reports along San Andreasfault in Lake Hughes area. ................. 12

Fig. 7 Locations of engineering geology reports along San Andreasfault in Sleepy Valley area. ................ 13

Fig. 8 Locations of engineering geology reports along San Andreasfault in western Palmdale area ............... 14

Fig. 9 Locations of engineering geology reports along San Andreasfault in eastern Palmdale area ............... 15

Fig. 10 Locations of engineering geology reports along San Andreasfault between Littlerock and Telegraph Peak areas. ..... 32

Fig. 11 Locations of engineering geology reports along San Andreasfault between Devore and San Gorgonio Mountain areas .... 32

Fig. 12 Locations of engineering geology reports along San Andreasfault in western San Bernardino area ............ 33

Fig. 13 Locations of engineering geology reports along San Andreasfault in eastern San Bernardino area ............ 34

Fig. 14 Locations of engineering geology reports along Mission Creek and Morongo Valley faults between San Gorgonio Mountain and Seven Palms Valley areas .................. 44

Fig. 15 Locations of engineering geology reports along Mission Creekfault in City of Desert Hot Springs. ............ 45

Fig. 16 Locations of engineering geology reports along San Jacintofault zone between Telegraph Peak and San Bernardino areas . 50

ILLUSTRATIONS (cont'd.)

Fig. 17 Locations of engineering geology reports along San Jacintofault zone in Colton area. ................. 51

Fig. 18 Locations of engineering geology reports along San Jacintofault zone between Sunnymead and Idyllwild areas ...... 56

Fig. 19 Locations of engineering geology reports along San Jacintofault zone in Heraet area .................. 57

Fig. 20 Locations of engineering geology reports along faults inSan Fernando area and Raymond Hill fault .......... 74

Fig. 21 Locations of engineering geology reports along faults inSan Fernando area. ..................... 75

Fig. 22 Locations of engineering geology reports along Inglewood-Newport fault zone between Inglewood and Seal Beach areas. . 78

Fig. 23 Locations of engineering geology reports along faults inInglewood area ....................... 79

Fig. 24 Locations of engineering geology reports along Inglewood-Newport fault zone in Long Beach and Signal Hill areas ... 80

Fig. 25 Locations of engineering geology reports along Inglewood-Newport fault zone in Huntington Beach area. ........ 81

Fig. 26 Locations of engineering geology reports along strands ofElsinore fault zone. .................... 97

vi

INTRODUCTION

This annotated bibliography lists reports prepared to satisfy the

Alquist-Priolo Special Studies Zones Act (AP); these reports include

detailed trench logs across the following faults in southern California:

San Andreas, San Jacinto, San Fernando, Inglewood-Newport, Whittier-

Elsinore, Garlock, and White Wolf (Fig. 1).

Approach

Reports on file with the California Division of Mines and Geology

(CDMG) and individual counties, cities and consultants were reviewed. It

was found that many reports available locally have not been filed with the

CDMG and, conversely, many reports filed with the CDMG are difficult to

obtain locally because old files have been retired. For some jurisdictions,

such as Riverside County, it was relatively easy to identify all appropriate

reports; in others the AP reports were filed with many other engineering

geology reports and difficult to separate. Initially it was planned to make

the bibliography comprehensive and include all AP reports for southern

California, but the volume of reports and time required to comb many local

files made this impossible. It was also found that many AP studies did not

include trenching and offered little or no new information; most of these

were omitted. We attempted to include all of the most significant reports

which describe either trenches with faulting or trenches located across a

fault. We would appreciate information on such additional reports over­

looked during our search or accomplished since for inclusion in possible

revised editions.

Acknowledgment s

The patience and cooperation of the following individuals in allowing

access to their files, essential for the completion of this project, are

gratefully acknowledged: Robert Sydnor and Earl Hart, California Division

117°

11

6°

San

Ber

nar

din

o C

o.

Ven

tura

Co.

%

F|

2Q

\

NIF

Z:

New

port

-Ing

lew

ood

fau

lt z

one;

SF

FZ:

San

Fern

ando

fa

ult

zone

; W

F:

Whittier

fault;

WW

F:

Whi

te W

olf

fau

lt.

Fig

. 1

- P

rin

cip

al

fau

lts

in

sout

hern

C

alif

orn

ia

cove

red

by A

lqu

ist-

Prio

lo S

peci

al

Stu

dies

Zo

nes

(Ha

rt,

1980

) an

d outli

nes

of

deta

iled m

aps.

of Mines and Geology; Anthony Brown, Riverside County; Michael Smith and

Mark Spikerman, Buena Engineers; Arthur Keene, David Poppler, Robert Smith,

and James Shuttleworth, Los Angeles County Engineer; Lyle Timberlake, Kern

County Public Works; Dennis Evans, Consultant to City of Signal Hill; Xeno

Colazas and Larry Olson, City of Long Beach; Alrick Stenzel, City of Hun-

tington Beach; and Cheri Leslie, Culver City Redevelopment Agency. We also

thank Earl Hart, Richard Moore and Merl Smith, California Division of Mines

and Geology, for loaning originals of maps and providing other materials.

The report was reviewed by Drs. Paul M. Merifield and Mason L. Hill. The

manuscript was typed by Miss Laurie Auerbach, and Miss Melanie Kissee and

Miss Sandra Petitjean drafted the illustrations.

ALQUIST-PRIOLO SPECIAL STUDIES ZONES ACT (AP) REPORTS BIBLIOGRAPHY

Locations of the study areas have been plotted on our file copies of

the State of California Special Studies Zones 7-1/2 minute quadrangles

prepared by the California Division of Mines and Geology, and are shown on

smaller scale strip maps along individual fault zones (Fig. 1). The strip

maps and bibliography indicate the appropriate 7-1/2 minute quadrangle.

The reports on the study areas are identified on the maps and in the

bibliography by numbers for each city and county. Reports for Riverside

County are identified by the number assigned by the County geologist (An­

thony Brown, personal communication, 1982). For other jurisdictions which

did not have applicable numbering systems we have assigned the numbers

(shown in parentheses) and included a brief site description. Reports on

file with the California Division of Mines and Geology (CDMG) are identi­

fied by the CDMG number (Lo and Moreno, 1980, and personal communication,

Earl Hart, 1983). The date of the report, investigating firm or geologist

and project number, if any, are also included for identification.

The results of the investigation are summarized in a brief paragraph

which indicates approximate depth(s) of trench(es), name of fault zone, name

and age of rock units exposed in trench(es), units displaced and nature of

Potentially active faults shown on U.S. Geological Survey 7^ minute quadrangle with State of California Alquist-Priolo Special Studies Zones (AP) delineated by California Division of Mines and Geology.

Other faults referred to in engineering geology reports.

Physiographic evidence of faulting referred to in report.

Open circle indicates location of report with no trenching identified by Riverside County number (#32). Fault located to northeast on basis of physiographic evidence (1*).

Ages of units reported in trenches:

1 <10,000 years old, Holocene alluvium.

2 upper Pleistocene, 10,000 - 500,000 years old, older alluvium, alluvial terrace deposits, and Pauba Formation (Kennedy, 1977).

3 lower Pleistocene, 500,000 - 3,000.000 years old, Temecula Arkose (Kennedy, 1977).

4 pre-Pleistocene, >3,000,000 years old.

Number within circle indicates trench(es) dug where number indicates age(s) of units reported using the above key. This symbol indicates no evidence of faulting in Holocene alluvium (1) across fault and no

#105 - - older units penetrated by test trench(es).

As above, except trench located northeast of fault.^^

#72

Fig. 2 - Explanation of representative symbols for detailed maps (Figs. 3-26) showing locations of engineering geology reports.

No evidence of faulting in older alluvium (2) overlain by Holocene alluvium (1) in trench(es) across fault.

As above, except trench located northeast of fault.

#4

#258

Line through circle indicates fault observed in trench cutting Holocene alluvium (1).

33. Physiographic evidence of faulting (1*) and faulted older fan deposits (2) in trench.

Holocene alluvium (1) faulted against Pauba Formation (2) in trench,

#34

Older alluvium (2) overlain by Holocene alluvium (1) faulted against pre-Pleistocene (4) bedrock in trench(es) across fault.

#199Temecula Formation (3) faulted against Pauba Formation (2); line at right angle to fault and interruption of fault line indicates older faulted rock units are overlain unconformably by unfaulted Holocene alluvium (1).

Fig. 2 (continued)

faulting, if any, and other evidence of faulting. The results are also

summarized graphically on the detailed maps (Figs. 3-26) by symbols

developed for this project and defined in Fig. 2. These symbols, modified

from a similar scheme presented by Ziony et al. (1973), allow quick

determination of the results and locations of individual investigations

identified by county or city number. The location of each report is shown

by one or more circles which show diagrammatically the ages of rock units

exposed and whether the units are faulted. A blank circle indicates no

trenching. A number "1" with an asterisk outside the circle means that

physiographic evidence of faulting is present. The numbers inside the

circle represent ages of earth materials exposed in the trenches (Fig. 2).

Lines through circles as extensions of faults on the map indicate that

the fault was exposed in the trench(es). Lines parallel to the fault

through the circle indicate that subsidiary faults were observed in the

trench(es). A circle located adjacent to the fault line shows position of

the trench(es), i.e., northeast or southwest of fault. Lines between

numbers in the circle at right angles to the adjacent fault represent

depositional contacts observed in the trench. Figure 2 shows examples of

most of the symbols illustrated on the detailed maps. Where more than one

trench was logged with different results, data from the trench indicating

the greatest earthquake hazards are summarized in the symbol.

Individual fault zones are discussed from north to south; the strip-

maps and report summaries generally run from northwest to southeast.

\Fi

g. 3

- Lo

cati

ons

of engineering g

eology r

eports al

ong

White

Wolf

and

other f

aults

that b

roke d

urin

g th

e 19

52 K

ern

Coun

ty e

arth

quak

e by

Kern

County n

umber.

See

Fig.

1 for

location an

d Fi

g. 2

for

expla­

nati

on o

f symbols.

Fig. 4

- Lo

cati

ons

of e

ngin

eeri

ng g

eology r

eports along

San

Andreas, B

ig P

ine

and

Garlock

faults b

etween

Cudd

y Va

lley

and L

iebre

Moun

tain

areas

by K

ern

and

Los

Ange

les

(*)

County n

umbers.

See

Fig.

1

for

location an

d Fi

g. 2

for

explanation

of s

ymbols.

County

(City)

of

Jurisdiction

Coun

ty

(Cit

y)

File

Number

CDMG

AP

File

Numb

er

1952 Earthquake Fa

ults

. Kern

Kern

(9)

950

7-1/

2 Mi

nute

Qu

ad ran

g te

( s)

County (F

ig.

3)

Rio

Brav

o Ranch

Date

of

Repo

rt ( s)

(Mo/da/yr)

10/78

Invest i ga

t ing

F i r

m or

Ge

olog

ist

Wi I

I iam

H. Pa

rk

Iden

tifi

cati

on Number an

d Si

te Description

Where

no

City or

County Number

Parcel Ma

p No

. Pa rce

I 2

3040

Kern

(10)

263

Kern

(11)

1000

00

Kern

(12)

887

Kern

(13)

1348

Kern

(14)

1030

Five trenches,

6 to

7

feet deep,

acro

ss tr

ace

of 1952 Ke

rn County earthquake

rupt

ure

(CDMG, 1967ww).

Trenches 1,

4:

faulting

in PIio-PI«istocene ag

e cl

ay,

sand and

grav

el de

posi

ts and

over

lyin

g Ho

loce

ne soil profife

(Qp

and

QaI

(?)

of Smith,.

1964).

Rio

Brav

o Ranch

Wi I

I iam H. Park

Parc

el Map No.

3604

4/78

(s

uper

­ se

des

7/76 re

­ po

rt)

Four

trenches,

6 to 7

feet

de

ep,

nort

heas

t of trace

of 1952 Kern Co

unty

earth­

quak

e ru

ptur

e (C

DMG,

1976ww).

Trench 1:

normal fa

ulti

ng in gray and

brow

n sandstones (Qp

of Smith, 19

64).

Tr

ench

3,4:

normal fa

ulti

ng

in w

hite to

gr

ay

sand

ston

e and

over

lyin

g "t

opso

il"

(Qp

and

QaI

(?)

of Smith, 19

64).

Rio

Bravo

Ranch

4/79

Wi I

I iam H. Pa

rkPa

rcel

Ma

p No

. 54

27

Pa rceI

1

Two

tren

ches

, 7

to 10 feet deep,

acro

ss trace

of 1952 Ke

rn County earthquake

rupt

ure

(CDM

G, 1976ww).

Trenches 1,

2:

normal fa

ulti

ng with minimum

vertical

offs

et of

8

feet

, in

PIio-Pleistocene Ke

rn River

Series and

clays, sands

and

gravels

of Ho

loce

ne ag

e (Qp

and

QaI

(?)

of Smith, 1964).

Rio

Bravo

Ranch

11/7

8Wi

I I i

am H. Park

Parc

el Ma

p No

. 4646

Parcels

A and

B

Four

trenches,

5 to

7

feet de

ep,

acro

ss tr

ace

of 1952 Kern County earthquake

rupt

ure

(CDM

G, 1976ww).

Tren

ches

1,

3,4:

normal faulting

in PIio-Pleistocene

Kern

Ri

ver

Seri

es and

overlying

clays, sands

and

gravels

of Ho

loce

ne Age

(Qp

and

Qal

(?)

of Smith, 19

64).

Rio

Brav

o Ra

nch

8/77

Wi I

I iam H.

Pa

rkParcel Ma

p No

. 3044

Pa rce

I 4

One

trench,

6 feet de

ep,

sout

hwes

t of

trace

of 1952 Kern County earthquake

rupt

ure

(CDM

G, 1976ww).

Normal fa

ulti

ng,

with minimum

esti

mate

d vertical

displacement of 20 fe

et,

in PI

io-P

leis

toce

ne continental

rock

s an

d ov

erly

ing

Holo

cene

soil (Q

p and

Qal

(?)

of Smith, 19

64).

Rio

Brav

o Ra

nch

9/78

Wi I

I iam

H. Pa

rkParcel Ma

p No.

4731

Four

trenches,

5 feet deep,

across tr

ace

of 1952 Ke

rn County earthquake rupture

(CDMG, 1976ww).

Tren

ch 1:

faul

ting

in

PI

io-P

leis

toce

ne age

sand

and

gravel

depo

sits

(Qp

of Smith, 19

64).

County

(City)

of

Jurisdiction

County

CDMG

(City)

AP

7-1/

2 File

File

Minu

te

Number

Number

Quad

rang

I e( s)

1952 Earthauake Faults

Kern

(15)

. Kern County

( Fiq

. 3)

SW 1/U

Breckenridge

Mounta in

Date

of

Re

port

( s)

(Mo/

da/y

r)

6/79

Invest igat ing

F i r

m or

Geologist

Wi 1

1 iam H. Park

Iden

tifi

cati

on Number and

Site

De

scri

ptio

n Where

no

City or County Nu

mber

Cumm

ings

Property

Parcel Ma

p No

. 5266

One

trench,

7 feet de

ep,

across subsidiary fault

northwest

of main tr

ace

of

Whit

e Wo

lf fault

(CDM

G, 1976vv).

No faulting in arkosic

pebbly sand,

silt

an

d clay of

Ho

loce

ne ag

e (Q

al (?

) of

Smith, 196U).

Coun

ty(C

ity)

ofJu

risd

icti

on

Coun

ty(C

ity)

Fi le

Number

CDMG AP Fi le

Number

7-1/

2Minute

Quadrangle! s)

Date

of

Repo

rt(s

)(Mo/da/yr)

Investigating

F i r

m or

Geol

og ist

Iden

tifi

cati

on Number and

Site De

scri

ptio

n Where

noCity or

County Number

Gar lock

an

d Big

Pine

Fa

ults

. Ke

rn County (F

ig.

U)

Kern

Kern

(6)

(7)

663 72

Fraz

ier

Mtn.

8/19/77

John

D.

Me

rriI

IPr

ojec

t #74088

Four

tr

ench

es,

maximum depth

8-1/2

feet,

across trace

of Garlock fault

(CDM

G,

l97U

kk).

Tr

ench

es 1-U:

no fa

ulti

ng in

Pleistoc

ene

terrace

deposits (Qt

of

Jennings an

d Strand,

1969).

Cudd

y Vat ley

2/75

Bryant-Park an

d Associates,

Inc,

Seve

nth

Day

Adventist

Church and

School Site,

Lake of the

Wood

s

One

trench,

6 feet de

ep,

acro

ss Bi

g Pine fa

ult

(CDMG, 197UJJ).

Normal faulting

with 9

inch

es of

ve

rtic

al displacement in

Ho

locene alluvium (Q

al of

Jennings

and

Strand,

1969).

Kern

(8)

1U29

Frazier

Mtn.

6/18

/81

Geop

lan,

In

c.Pr

ojec

t #1

5501

*

Fourteen tr

ench

es,

aver

age

depth 6

feet,

acro

ss and

sout

h of

tr

ace

of Garlock

faul

t (CDMG, 19

7Ukk

).

Tren

ches

ac

ross

Garlock fault

show no

faulting in

fan-

glomerate or

ov

erly

ing

residual soil (Qt

and

Qal

of Jennings and

Strand,

1969).

Tren

ch 1U

, south

of Garlock fa

ult,

ex

pose

d subsidiary fa

ult

in gr

anit

e, but

does

no

t di

spla

ce ov

erly

ing

residual soil (g

ra and

Qal

of Jennings and

Strand,

1969

).

San

Andr

eas

Faul

t. Kern County (F

ig.

1*)

Kern

(D

38Sa

wmiI

I Mtn.

03/U/70

10/2

2/71

F. Be

ach

Leig

hton

Mill Potrero

Deve

lop­

ment Ar

ea,

Proj

ect

#1620

Seven

tren

ches

an

d th

irty

-eig

ht pits,

maximum depth

12 feet,

across San

Andreas

faul

t (CDMG, 19

7UII

).

Pits 2,

3,8,

10,1

2:

"Ancestral so

il zones, re

cent

alluvium

and

slopewash

debr

is ar

e fa

ulte

d an

d co

ntor

ted

within active tr

ace

of fa

ult"

(Q

al of

Jennings an

d Strand,

1969

).

Kern

(2)

211*

Cuddy Valley

12/1

6/71

F. Beach

Leig

hton

and

Associates,

Inc.

Proj

ect

#1652

Seve

n te

st pits,

unsp

ecif

ied

dept

h, ac

ross

Sa

n Andreas fa

ult

(CDMG, 197UJJ).

Pits 1-U:

Highly sheared

bedrock an

d re

cent

faul

ting

in older and

Holocene

alluvium (m-ls, ms,

Qt an

d Qal

of Jennings an

d St

rand

, 19

69).

Pits 5

and

7:

faul

ted

bedrock, bu

t no

fa

ulti

ng in

ov

erly

ing

Holocene alluvium (Q

al of

Jennings

and

Strand,

1969).

Kern

(3)

18Cu

ddy

Valley

10/25/74

Joseph A.

Johnson

Lot

96,

Tract 33

U8

One

tren

ch,

5-1/2

feet

deep,

sout

h of

ma

in tr

ace

of San

Andreas fault

(CDM

G,

197UJJ).

No fa

ulti

ng in

Holocene alluvium (Qal

of

Jennings and

Strand,

1969).

County

(Cit

y)of

Juri

sdic

tion

County

(City)

Fi le

Number

CDMG AP Fi l

eNu

mber

7-1/2

Minu

teQuad rang le( s)

Date

of

Repo

rt( s)

(Mo/da/yr)

Inve

stig

atin

gF

i rm

orGeo log is

t

Identification Number a

ndSite De

scri

ptio

n Wh

ere

noCi

ty or C

ounty

Number

San

A

nd

rea

s F

au

lt.

Ke

rn

Co

un

ty (F

ig.

U)

Ke

rn(U

)51

Kern

(5)

1U66

Fra

zie

r M

tn.

1/7

5

Bry

ant-

Park

an

d A

ssocia

tes,

Inc.

Lot

Nos. 7,8,9,10,

Bloc

k 18,

Trac

t U,

Fr

azie

r Mtn. Park

One

tren

ch,

6 fe

et de

ep,

north

of San

Andreas

fault

(CDM

G, 197Ukk).

No fa

ulti

ng

in "granitic

fang

lome

rate

" or

overlying "p

ebbl

y, to

psoi

l ma

ntle

" (Q

t and

QaI

of J

enni

ngs

and

Stra

nd,

1969

).

Fra

zie

r M

tn.

1/2

5/8

2

Ge

op

lan

, In

c.

Pro

ject

#1

56

87

Two

trenches,

max

imum

depth

6

-1/2

fe

et,

acro

ss

tra

ce

o

f S

an

An

dre

as

fault

(CD

MG

, 1

97

Ukk

).

Tre

nch

es

1,2

: no

fa

ultin

g

in

"dark

fa

nglo

mera

te"

or

ove

rlyin

g

Ho

loce

ne

a

lluviu

m

(Qt

and

QaI

o

f Jennin

gs

and

Str

and,

1969).

\

Vft

1<fi*&

&

\

\ __

_

_

___ _

\

I _

__

San

And

reas

Fau

lt \

GR

) 6

15

X

f'gure

6

#2

#3 &

4

SC

ALE

Fig.

5

- Lo

cati

ons

of e

ngin

eeri

ng g

eology r

eports al

ong

San

Andreas

faul

t between

Lake H

ughes

and

Palm-

dale a

reas

by

Los

Ang

eles County n

umbe

r.

See

Fig.

1 for

location an

d Fi

g. 2

for

explanation

of

symbols.

Fig.

6

- Lo

cati

ons

of e

ngin

eeri

ng g

eology r

epor

ts along

San

Andr

eas

faul

t in

Lake

Hughes area b

y Lo

s An

gele

s County n

umber.

See

Fig.

5

for

location a

nd F

ig.

2 for

explanation

of s

ymbols.

u>

Fig.

7

- Lo

cati

ons

of e

ngineering g

eolo

gy r

eports al

ong

San

Andr

eas

fault

in S

leep

y Valley a

rea

by L

os A

ngel

es

County n

umber.

See

Fig.

5

for

location a

nd Fi

g. 2

for

expl

anation

of s

ymbo

ls.

Fig. 8

- Lo

cati

ons

of e

ngineering g

eolo

gy reports

along

San

Andreas

fault

in w

este

rn P

almdale

area b

y Lo

s An

gele

s County an

d Ci

ty o

f Pa

lmda

le (*

) nu

mber

s.

See

Fig.

5

for

location an

d Fig. 2

for

expl

anat

ion

of s

ymbols.

Fig. 9

- Lo

cati

ons

of e

ngin

eeri

ng g

eolo

gy r

eports al

ong

San

Andreas

fault

in e

aste

rn P

almd

ale

area b

y Lo

s Angeles

County n

umbe

r.

See

Fig.

5

for

location and

Fig. 2

for

expl

anat

ion

of s

ymbols.

Coun

ty(C

ity)

ofJurisdiction

Coun

ty(City)

Fi le

Numb

er

CDMG AP Fi le

Number

7-1/2

Minute

Quadrangle( s)

Date

of

Report( s)

(Mo/da/yr)

Invest iga

ting

F i r

m or

Geol

og i st

Iden

tifi

cati

on Number a

ndSite De

scri

ptio

n Wh

ere

noCity o

r County Nu

mber

San

Andreas

Faul

t. Lo

s Angeles

County (F

iqs.

U-101

Los

Angeles

(1)

12«4l

Los

Angeles

(2)

Los

Angeles

(3)

Los

Ange

les

((*)

Los

Angeles

(5)

1U10

Los

Angeles

(6)

1181

Lebe

c9/

9/80

Michael

V. Sm

ith

File

#8027-1.

3810

1 German

Post

Ro

ad,

Gorman.

One

tren

ch,

maximum

dept

h 6

feet

, northeast

of San

Andreas

fault

(CDMG, 19

7Mt)

. No fa

ulti

ng

in PIio-Pleistocene Hungry V

alley

Formation

or Ho

loce

ne al

luvi

um

(Puc

and

QaI

of J

enni

ngs

and

Stra

nd,

1969

).

Lake Hu

ghes

2/19

/75

supple­

ment

: 5/

03/7

8

Buena

Engi

neer

s,

Inc.

Job

#B-1

330-

L01

Three

tren

ches

an

d one

pit,

6-

12 fe

et de

ep,

southwest

of main trace

of San

Andr

eas

fault

(CDM

G, 197Ux).

No faulting in

qu

artz

mo

nzon

ite

bedr

ock,

fa

nglo

mera

te or

Holocene alluvium (g

gd(?

), Qf an

d QaI

of Beeby, 19

79).

Lake

Hu

ghes

5/U/

72Ea

rl R. Morley,

Jr.

Phase

I, Fo

rest

La

kes

Mobile

Home Estates, Mu

nz La

ke.

One

trench,

15 fe

et de

ep,

southwest

of main trace

of San

Andreas

fault

(CDM

G,

197Ux).

Jointing an

d sh

eari

ng in

gr

anit

ic be

drock, but

no faulting in

Ho

loce

ne

alluvium (d

gn and

QaI

of Be

eby,

19

79).

Lake

Hu

ghes

1/18/70

Jame

s E.

Sl

osso

n an

d As

soci

ates

Proposed Ma

nzan

ita

Hill

s Vi

llag

e Mo

bile

Home Park,

vicinity of

Lake Hughes.

Six

trenches,

U-9

feet

de

ep,

southwest

of main trace

of San

Andreas

fault

(CDM

G,

197Ux).

Tren

ches

2,3:

fractured

and

sheared

granodiorite bedrock, but

no fa

ulti

ng

in Ho

loce

ne al

luvi

um o

r fi

ll material (ggd,

QaI

and

af of Be

eby,

19

79).

Trenches

5,6:

hi

ghly

wea

ther

ed,

frac

ture

d and

sheared

granodiorite w

ith

we I I-

deve

lope

d joints.

Fault

location ap

prox

imat

ely

dete

rmin

ed by

changes in

in

tens

ity

of fractur­

ing, sh

eari

ng an

d jointing in

gr

anod

iori

te be

droc

k (g

gd of Be

eby,

19

79).

Lake Hu

ghes

9/2/

81Ge

opla

n,

Inc.

Project

#155

78.

15530

West

Alps

Drive, Elizabeth

Lake

.

One

trench,

unsp

ecif

ied

dept

h, so

uthw

est

of m

ain

trace

of San

Andreas

faul

t (CDMG,

197U

x).

No fa

ulti

ng in

ol

der

allu

vial

fan

depo

sits

or

Holocene alluvium (Qof and

QaI

of Be

eby,

19

79).

Lake

Hu

ghes

6/26

/80

Mich

ael

V. Sm

ith

File

#8021-1.

U281

8 Apollo

Drive, El

izab

eth

Lake

.

Two

trenches,

6 fe

et de

ep,

northeast

of m

ain

trace

of San

Andr

eas

fault

(CDMG, 19

7Ux)

Trenches 1,2:

No faulting in

buff ar

kose

or c

lay

shale

members

of Pliocene Anaverde

Form

atio

n or

re

sidu

al soil (T

ab,

Tas

and

Qpa

of Beeby, 1979).

Coun

ty

(City)

of

Juri

sd ict ion

County

(City)

Fi le

Number

CDMG AP Fi l

eNumber

7-1/2

Minu

te

Quad

ran

g Ie(s)

Date

of

Repo

rt(

s)(Mo/da/yr)

Investigating

F i r

m or

Ge

olog

i st

Iden

tifi

cati

on Number and

Site De

scri

ptio

n Where

noCity or

County Number

San

Andreas

Fault. Los

Ange

les

County (F

igs.

U-

10)

Los

Angeles

(7)

Los

Angeles

(8)

Los

Angeles

(9)

Los

Angeles

(10)

1*42

5

1055

1377

Los

Ange

les

(86

B*)

Los

Ange

les

(87

Lake Hu

ghes

10/2

6/81

Bu

ena

Engineers,

Inc.

Job

#B-1

900-

L01.

Lot

UU,

Tract

19278, Apollo Drive,

El iza

beth

Lake.

One

tren

ch,

6 1/

2 feet de

ep,

nort

heas

t of

ma

in trace

of San

Andreas

fault

(CDMG,

197*

4x).

No

faulting in

bu

ff ar

kose

or

cl

ay sh

ale

member of th

e Pl

ioce

ne An

aver

de

Form

atio

n or

residual soil (T

ab,

Tas

and

QaI

of Beeby, 19

79).

Lake Hu

ghes

10/29/79

Mich

ael

V. Sm

ith

File

#7

957-

1.

1U609

Flint-

stone

Drive, Elizabeth

Lake

.

One

tren

ch,

6 feet de

ep,

sout

hwes

t of ma

in tr

ace

of San

Andr

eas

fault

(CDMG, 197Ux)

No faulting in

cl

ay shale

memb

er of Pliocene Anaverde Fo

rmat

ion

or residual soil

(Tas

an

d Qa

I of Beeby, 19

79).

Lake

Hu

ghes

7/27

/7*4

William

Wa i sge rb

e r

and

Asso

ciat

esRef. No

. 7U183

L 05

3 E.

Lot

77,

Tract

2U829,

Clydesdale Road,

Eliz

abet

h La

ke.

One

trench,

maximum

dept

h 5

feet

, northeast

of ma

in trace

of San

Andreas

fault

(CDM

G, 197Ux).

No faulting

in ar

kosi

c sa

ndst

one

bedrock

or Holocene alluvium

(Tab

and

Qsw

of Beeby, 19

79).

Lake Hu

ghes

8/7/

81Buena

Engineers,

Inc.

Job

0B-1893-L01.

1U370

Eliz

abet

h Lake Road,

Eliz

abet

h La

ke.

Three

tren

ches

, maximum

8 feet deep,

acro

ss su

bsid

iary

fault

of No

rth

Branch San

Andreas

fault

(CDM

G, 19

7*4x

).

Tren

ch 2:

faul

ting in

Ho

loce

ne fan

depo

sits

, but

no

faul

ting

in

ov

erly

ing

Holo

cene

al

luvi

um (Qf

and

QaI

of Beeby, 1979).

Lake

Hughes

11/U/82

Buena

Engineers,

Inc.

Job

0B-201U-L01

Three

tren

ches

, 6

to 15 fe

et de

ep,

acro

ss main trace

of San

Andr

eas

fault

(CDMG,

197UX).

Tren

ch

1:

faulting in

older

allu

vium

and

pond

ed alluvium (Q

oa and

Qpa

of Beeby, 19

79).

Lake Hu

ghes

6/

18/8

1 Bu

ena

Engineers,

Inc.

Job

0B-1873-L01

One

tren

ch,

maximum

depth

15 fe

et,

acro

ss un

name

d su

bsid

iary

fa

ult

southwest

ofma

in trace

of San

Andreas

faul

t (B

eeby

, 1979).

No faulting in

older

or Ho

loce

nefa

n de

posi

ts (Q

of and

QaI

of Beeby, 19

79).

* Not

filed

with Los

Ange

les

Coun

ty;

may

be co

nsul

ted

at Bu

ena

Engi

neer

s, U2326

10th St

. We

st,

Lanc

aste

r,

CaIifornia.

Coun

ty

(City)

of

Juri sd ict io

n

County

(City)

Fi l

e Number

CDMG AP File

Number

7-1/

2 Minute

Quad

ran

g I e( s)

Date of

Repo

rt(

s)(Mo/da/yr)

Invest igat in

g F

i rm

or

Geol

og ist

Iden

tifi

cati

on Number and

Site De

scri

ptio

n Where

noCity or

County Number

oo

San

Andreas

Fault. Los

Ange

les

County (F

igs.

M-

10)

Los

Angeles

(88

B*)

Los

Ange

les

(89)

Los

Angeles

(90

B*)

Los

Ange

les

(91)

Los

Ange

les

(92

B*)

Los

Ange

les

(93)

Los

Ange

les

(9U)

1M52

Lake Hu

ghes

6/25/82

Buen

a En

gine

ers,

Inc.

Job

0B-1986-L01

Two

tren

ches

, 5

to 10

fe

et de

ep,

nort

heas

t of

ma

in trace

of San

Andr

eas

fault

(CDMG, 19

7Mx)

. Tr

ench

1:

faulting in clay shale

member of

Pl

ioce

ne Anaverde

Formation, but

no faulting

in ov

erly

ing

residual soil (T

as of Beeby, 1979).

Lake

Hu

ghes

12/12/79

Mich

ael

V. Sm

ith

File

#

79

63

-3

Two

trenches,

6 fe

et

deep,

nort

heast

of

San

A

nd

rea

s fa

ult

(CD

MG

, 1

97

Ux).

T

rench

1 fa

ultin

g

in buff

ark

ose

and cla

y

shale

m

embe

r of

Plio

ce

ne

A

na

ve

rde

F

orm

ation.

No

faultin

g

in overlyin

g

resid

ua

l so

il

(Ta

b

an

d

Ta

s o

f B

ee

by,

1

97

9).

Lake

H

ughes

12/3

/81

Bue

na

Engin

eers

, In

c.

Job

0B

-1920-L

02

Two

trenches,

max

imum

depth

9

feet,

nort

heast

of

ma

in

tra

ce

o

f S

an

Andre

as fa

ult

(CD

MG

, 1

97

Mx)

. T

renches

1,2

: p

ossib

le

faultin

g

in buff

ark

ose

m

embe

r o

f P

lioce

ne

A

naverd

e

Fo

rma

tio

n

an

d old

er

allu

viu

m

(Tab

an

d

Qoa

o

f B

eeby,

1

97

9).

Lake

H

ug

he

s1

0/1

2/8

1B

uena

E

ngin

eers

, In

c.

Job

#B

-1918-L

01

Th

ree

tr

enches,

5 to

8

feet

deep,

acro

ss

su

bsid

iary

fa

ults

no

rth

ea

st

of

ma

in

tra

ce

o

f S

an

Andre

as

fau

lt

(Beeby,

19

79

).

Tre

nches

1,3

(L

ots

M

8,5

0):

fa

ultin

g

in o

lde

r a

llu

viu

m

(Qoa

o

f B

ee

by,

1979).

La

ke

Hughes

3/2

5/8

2B

uena

E

ngin

eers

, In

c.

Job

0B

-19U

O-L

01

Tw

o tr

enches,

5 fe

et

de

ep

, a

cro

ss

su

bsid

iary

fa

ult

no

rth

ea

st

of

ma

in

trace o

f S

an

An

dre

as fa

ult

(Beeby,

19

79

).

Tre

nches

1,2

: no

fa

ultin

g

in b

uff

ark

ose

mem

­ ber

of

Plio

cene

An

ave

rde

F

orm

ation,

old

er

alluviu

m or

resid

ua

l so

il

(Tab

and

Qoa

o

f B

eeby,

1

97

9).

Lake

H

ug

he

s10/2

0/8

1B

uena

E

ng

ine

ers

, In

c.

Job

0B

-1930-L

01

Fo

ur

trenches,

5 fe

et

deep,

no

rth

ea

st

of

ma

in

trace o

f S

an

Andre

as fa

ult

(CD

MG

, 1

97

Mx)

. T

ren

ch

E

-1:

possib

le fa

ultin

g

in

red

ark

ose

mem

ber

of

Plio

ce

ne

A

na

ve

rde

F

orm

atio

n

(Tar

of

Be

eb

y,

19

79

).

Tre

nch

T

-2:

po

ssib

le fa

ultin

g

in buff

ark

ose

and cla

y

shale

m

embe

rs o

f P

lioce

ne

A

na

ve

rde

F

orm

ation.

No

faultin

g

in

resid

ual

so

il

(Tab

an

d

Ta

s o

f B

ee

by,

1979).

Lake

H

ughes

9/2

2/8

1B

uena

E

ngin

eers

, In

c.

Job

#B

-1913-L

01

One

tr

ench,

7 fe

et

deep,

south

west

of

str

and o

f S

an

An

dre

as fa

ult

(CD

MG

, 197U

x).

N

o fa

ultin

g

in

red

ark

ose

, buff

ark

ose

a

nd

cla

y

sh

ale

m

embe

rs o

f P

lioce

ne

A

na­

ve

rde

F

orm

atio

n o

r re

sid

ua

l soil

(Tar,

T

ab

an

d

Ta

s o

f B

ee

by,

1

97

9).

* N

ot

file

d w

ith

Lo

s A

ngele

s

County

; m

ay

be

consulted a

t B

uena

E

ng

ine

ers

, U

23

26

10th

S

t.

We

st,

La

nca

ste

r,

Ca

I i f

o rn

i a

.

County

(Cit

y)of

Juri

sdic

tion

County

(Cit

y)Fi

leNumber

CDMG AP Fi le

Number

7-1/

2Mi

nute

Quad

ran

g le( s)

Date

of

Report( s)

(Mo/

da/y

r)

Investigating

F i r

m or

Geologist

Iden

tifi

cati

on Number and

Site

De

scri

ptio

n Where

noCity or

Co

unty

Number

San

A

nd

rea

s F

au

lt.

Lo

s A

ngele

s C

ou

nty

(F

igs.

U-1

0)

Los

Angele

s (9

5

B*)

Los

Angele

s (9

6

B*)

Los

Angele

s (9

7)

Los

Angele

s (1

1)

urn

Los

Angele

s (1

2)

1195

Lake

H

ughe

s11/1

9/8

2B

uena

E

ngin

eers

, In

c.

Job

#8-2

021-L

01

One

tr

en

ch

, 5

to

9 fe

et

de

ep

, n

ort

he

ast

of

ma

in

tra

ce

o

f S

an

An

dre

as

fault

(CD

MG

, 1

97

Ux)

. F

au

ltin

g

in b

uff

ark

ose

an

d cla

y

shale

m

embe

rs o

f P

liocene

An

ave

rde

F

orm

atio

n

(Ta

b

and

Tas

o

f B

ee

by,

1979).

Lake

H

ughe

s11/6

/81

Bue

na

Engin

eers

, In

c.

Job

#

B-1

92

6-L

01

One

tr

en

ch

, 5

fee

t d

ee

p,

no

rth

ea

st

of

ma

in

tra

ce

o

f S

an

An

dre

as

fault

(CD

MG

, 1

97

Ux)

. F

au

ltin

g

in b

uff

ark

ose

an

d cla

y

shale

m

embe

rs o

f P

liocene

An

ave

rde

F

orm

atio

n

and

resid

ua

l soil

(Ta

b

and

Tas

o

f B

ee

by,

1979).

Lake

H

ughe

s6

/7/8

2B

uena

E

ngin

eers

, In

c.

Job #B-W8-L03

Two

tren

ches

, maximum

dept

h 13

fe

et,

northeast

of main tr

ace

of Sa

n Andreas

faul

t (C

DMG,

197Ux).

Trench 2:

faul

ting

in bu

ff ar

kose

and

clay

shale

members

of Pl

io­

cene

An

aver

de Fo

rmat

ion

(Tab an

d Tas

of Beeby, 19

79)

and

fault

plac

ing

Pre-Tertiary

gran

itic

rock ag

ains

t clay shale

member of

Pl

iocene

An

aver

de Fo

rmat

ion

(dgn

and

Tas

of Beeby, 19

79).

Del

Sur

10/8/81

Buen

a En

gine

ers

Job

#B-1

86U-

L01.

Te

ntat

ive

Minor

Land Di

visi

on Map

#138

77,

Leon

a Va

I ley.

Three

tren

ches

, U-6

feet

deep,

sout

hwes

t of

main tr

ace

of Sa

n Andreas

faul

t (CDMG,

1979y).

No faulting

in pre-Tertiary diorite-gneiss co

mple

x, overlying

fan

depo

sits

and

Holocene alluvium or

co

lluv

ium

(dgn

, Qf

and

QaI

of Kahle, et al

.. 1975).

Del

Sur

5/26

/80

Eber

hart

-Axt

en

and

Asso

c.,

Inc.

W.O. 10

72.

Vall

ey.

PM #13113,

Leona

Eigh

t tr

ench

es,

averaging

7-8

feet

de

ep,

acro

ss the

main trace, a

spli

nter

of

the

north

bran

ch an

d the

ancestral

trac

e of

the

San

Andr

eas

fault

(CDMG, 1979y).

Tren

ches

3,4,5,6,7:

series

expr

esse

d in "two primary

sets

the

north

bran

ch an

d the

ancestral

trac

eof

en

ec

helo

n fa

ults

of the

main

trace

of Sa

n An

drea

s ts

" in Pliocene An

aver

de buff ar

kose

member,

olde

rfan

depo

sits

and

Holo

cene

al

luvi

um (Tab,

Qof

and

Qa I

(?)

of Kahle, et al .

. 1975).

Tren

ch 8:

pond

ed alluvium,

gouge

zones, br

ecci

atio

n an

d fa

ulti

ng on

no

rth

branch

dark gray ar

kosi

c sa

ndst

one

of Pl

ioce

ne Anaverde Fo

rmat

ion

and

of Sa

n An

drea

s in

Holo

cene

alluvium (T

ab an

d Qa

I of

Kahle, et

a

I . .

1975).

faulting on

ancestral

trace

of Sa

n Andreas

in shale

and

buff

arkose members

ofPliocene Anaverde Formation, older

fan

deposits and

Holocene alluvium (T

ab,

Tas,

Qof

and

Qa I

of Kahle, et

a

I . .

1975

).

In the

nort

hwes

t corner of

the

site,

ageomorphica

I ly we I

I -re

p re

sent

ed thrust fa

ult

has

plac

ed the

shal

e units

of the

Plio

cene

Anaverde Fo

rmat

ion

against

the

buff ar

kose

un

it (Tab an

d Ta

s of

Kahle,

et a_L.,

1975

).

Tren

ches

1E

,2,3

,5:

* Not

filed with Los

Angeles

Coun

ty;

may

be consulted

at Buena

Engineers, 42326

10th St

. We

st,

Lancaster,

CaIifornia.

County

(City)

of

Juri

sdic

tion

County

(City)

Fi le

Number

CDMG AP Fi le

Number

7-1/2

Minu

te

Quad

ran

gle(

s)

Date of

Repo

rt(s

)(Mo/da/yr)

Investigating

Fi rm or

Ge

olog

i st

Identification Nu

mber

and

Site

De

scri

ptio

n Wh

ere

noCity o

r County N

umber

K> o

San

Andreas

Faul

t. Lo

s Angeles

County (F

igs.

U-10)

Los

Ange

les

(13)

Los

Angele

s (14)

Los

Angeles

(15)

Los

Angeles

(16)

Los

Angeles

(17)

Los

Angeles

(18)

1158 889

DeI

Su r

9/26

/79

Mich

ael

V. Sm

ith

File

#7

9U4-

1.

Tentative

Land

Divi

sion

Ma

p #11625,

Leona

Vall

ey.

One

tr

en

ch

, 6

fee

t d

ee

p,

south

west

of

San

A

nd

rea

s fa

ult

(CQ

^G,

1979y)

. N

o fa

ultin

g

in p

re-T

ert

iary

dio

rite

-gneis

s

com

ple

x o

r re

sid

ua

l so

il

(dg

n

and

Qc

of

Kahle

, e

t a

l,

1975).

DeI

Su

r9/2

8/7

9

Joh

n

D.

Me

rriI I

Pro

ject

#959

76

Two

trenches,

max

imum

depth

6

fee

t,

acro

ss

San

A

nd

rea

s fa

ult

(CD

MG

, 1979y)

. T

ren

che

s 1,2

: S

trong

fractu

ring,

shearing

and

cla

y

go

ug

e

in pre

-Tert

iary

horn

­ ble

nde dio

rite

bre

ccia

bedro

ck

and

Plio

cene

An

ave

rde

F

orm

ation

(dg

n

and

Tab

(?

) o

f K

ahle

, e

t a[..

19

75

).

No

faultin

g

in o

ve

rlyin

g

resid

ua

l so

il

(Ql

of

Kahle

, e

t a

_i.,

1

97

5).

Sle

epy

VaI

ley

U/1

8/8

0

Eberh

art

-Axte

n

and

Assoc.,

Inc.

W.O.

1071.

Tent

ativ

e Tr

act

39U60, Leona

Vall

ey.

Fort

y te

st

pits,

5-1

5

fee

t d

ee

p,

no

rth

ea

st

of

Leon

a V

alle

y fa

ult

and

south

west

of

San

A

nd

rea

s fa

ult

(CD

MG

, 1979z)

. N

o fa

ultin

g

in pre

-Tert

iary

dio

rite

-gneis

s

com

­ ple

x o

r o

ve

rlyin

g

fan d

ep

osits

and

Ho

loce

ne

co

lluviu

m

(dgn,

Qo

f an

d Q

aI

of

Kahle

, e

t a

j.,

1975).

Sle

epy

Va

lle

y

11/4

/81

Bue

na

Engin

eers

, In

c.

Job.

#B

-1925-L

01.

Te

nta

tive

M

inor

Land

D

ivis

ion

M

ap

11

45

48

, Le

ona

Va

I le

y.

Thre

e trenches,

4-15

fe

et de

ep,

acro

ss Leona

Aven

ue and

subs

idia

ry fa

ults

(C

DMG,

1979Z).

Tren

ch C:

fault

gouge, fr

actu

res

and

numerous fa

ults

in

pre-Tertiary

diorite-gneiss co

mple

x, gr

anit

e and

overlying

Plei

stoc

ene

older

fan

deposits (dgn

and

Qof

of Kahle, et

aj..,

1975

).

Slee

py V

alley

12/1

1/78

Mi

chae

l V. Sm

ith

File #78-36.

Tentative PM #11467,

Leona

VaI ley.

Five tr

ench

es,

6-10

fe

et de

ep,

acro

ss Leona

Aven

ue fault

(CDMG, 1979z).

Tren

ch 1:

br

ecci

atio

n, shearing an

d fa

ulti

ng in pre-Tertiary

dio

rite

-gne

iss

complex.

No fa

ult­

ing

in ov

erly

ing

resi

dual

so

il (dgn an

d Qa

I (?

) of Ka

hle,

et al

.. 19

75).

Slee

py V

aI ley

10/1

2/76

Wi I

I Jam

Wa is

gerb

er

and

Asso

ciat

esReference #76287-EIR-0041.

9306

Leona

Avenue,

Leon

a Valley.

One

trench,

maxi

mum

depth

12 fe

et,

northeast

of Leona

Avenue fault

(CDM

G, 19

79z)

. No

fa

ulti

ng in

ar

kosi

c sa

ndst

one

or alluvium (T

ar o

r Ta

b and

QaI

of Ka

hle,

et a

1. 19

75).

Los

Ange

les

(19)

1056

Slee

py V

aI ley

10/2

2/79

Michael

V. Smith

File

#78-21.

9211

El

izab

eth

Lake Ro

ad,

Leona

Vall

ey.

One

trench,

maxi

mum

dept

h 15

fe

et,

faulting in

Ho

loce

ne al

luvi

um (Q

alsouthwest

of San

Andr

eas

of Ka

hle,

et

aj..,

1975

).fault

(CDM

G, 1979Z).

No

County

(C i ty

)of

Juri sd ic

t ion

Coun

ty(City)

Fi le

Numb

er

CDMG AP File

Number

7-1/2

Minute

Quad

rang Ie

(s)

Date

of

Report!s)

(Mo/da/yr)

Invest igating

F i rm

or

Geol

og i st

Iden

tifi

cati

on Number an

dSi

te De

scri

ptio

n Where

noCity or County Number

San

Andreas

Faul

t. Lo

s Angeles

County (F

igs.

1-

10)

Los

Ange

les

(20)

Los

Ange

les

(21)

Los

Ange

les

(22)

Los

Ange

les

(23)

Los

Ange

les

(24)

Los

Angeles

(98)

Los

Angeles

(25)

Los

Ange

les

(26)

39 313

1029

1351

Slee

py Valley

9/21

/78

Mich

ael

V. Sm

ith

File #78-21.

9715

Elizabeth

Lake

Road,

Leona

Vall

ey.

One

tren

ch,

maximum

dept

h 15 feet,

nort

heas

t of

San

Andr

eas

fault

(CDMG, 1979z).

No

faulting

in Ho

loce

ne al

luvi

um (Qal of

Kahle, et

a I.,

1975).

Slee

py Valley

9/11

/71

John

0. Ni

gra

Proj

ect

#871-752.

8817

El

iza­

beth La

ke Road,

Leona

Valley.

Four

tr

ench

es,

maximum

dept

h 16

fe

et,

acro

ss San

Andr

eas

fault

(CDM

G, 1979z).

Trench

2:

Faul

ting

as

ev

iden

ced

by "m

arke

d ve

rtic

al zo

ne of de

marc

atio

n pl

acin

g pebbly allu­

vial

interbeds, light

tan

in shade, ag

ains

t dark,

orga

nic,

ma

ssiv

e si

lty

clay

."

(Qal of Kahle, et aj

k ,

1975

).

Slee

py Va

I le

y8/

19/7

1 John D. MerriI I

Project

#11201.

NW corner 90th

St.

West

and

Elizabeth

Lake

Ro

ad,

Leona

VaI ley.

One

trench,

aver

age

dept

h 9

feet,

sout

hwes

t of

Sa

n Andreas

fault

(CDMG, 1979z).

No

faulting

in Ho

loce

ne al

luvi

um (Qal of

Kahle, et a I..

1975).

Slee

py Va

I le

y5/

1/79

Mich

ael

V. Smith

File #7

919-

1.

8216

W.

Ca

lva

St., Le

ona

VaI ley.

One

tren

ch,

8 fe

et deep,

northeast

of ma

in trace

of San

Andr

eas

fault

(CDMG, 19

79Z)

. No faulting in

Ho

loce

ne fan

deposits (Qf

of Kahle, et a I..

1975

).

Slee

py Va

I ley

6/5/

81Buena

Engineers,

Inc.

Job

#B-1858-L01.

Port

ion

of

lot

9, Tr

act

28381, Leona

Valley.

One

trench,

maxi

mum

dept

h 7

1/2

feet,

nort

heas

t of

San

Andreas

fault

(CDMG, 1979z).

No faulting

in "o

lder

" fan

deposits (Q

f of

Kahle, et a I.

. 19

75).

Slee

py Valley

7/28

/81

Buen

a En

gine

ers,

Inc.

Job

#B-1815-L01

Two

trenches,

5 to

13

feet deep,

acro

ss an

d no

rthe

ast

of ma

in trace

of Sa

n Andreas

fault

(CDM

G, 1979z).

Trenches 1,2:

no faulting in

Ho

loce

ne fan

deposits or al

luvi

um.

Slee

py Valley

5/10

/71

John D.

Me

rril

lProject

#123

21.

Lot

35,

Trac

t 5118,

Leona

Valley.

One

tren

ch and

two

test pits,

maxi

mum

depth

10 fe

et,

northeast

of Leona

Vall

ey fault

(CDMG, 19

79z)

. No faulting in

gr

anit

e bedrock

or Ho

loce

ne al

luvi

um (d

gn and

Qal

of

Kahle, et aj_.,

1975

).

Slee

py Valley

7/7/

77

John D.

Merrill

Proj

ect

#71072.

Vici

nity

of

8353

El

izab

eth

Lake Ro

ad,

Leon

a VaI ley.

One

tren

ch,

maximum

depth

7 feet,

nort

heas

t of

San

Andreas

fault

(CDMG, 1979z).

No

faulting in

"o

lder

" fan

depo

sits

or

Ho

loce

ne alluvium (Qf

and

Qal

of Kahle, et a I..

1975

).

Coun

ty

(City)

or

Juri

sd ic

t ion

Coun

ty(C

ity)

Fi le

Numb

er

CDMG AP File

Number

7-1/2

Minute

Quadrangle(s)

Date

or

Repo

rt( s)

(Mo/

da/y

r)

Investigating

F i rm or

Ge

olog

i st

Iden

tifi

cati

on Number an

dSi

te De

scri

ptio

n Where

noCi

ty or

County Number

ro

ro

San

Andr

eas

Fault. Lo

s Angeles

County

( Fig

s. <4

-10)

Los

Ange

les

(27)

Los

Angeles

(28)

Los

Ange

les

(29)

Los

Angeles

(30)

Los

Ange

les

(31)

Los

Ange

les

(32)

Los

Angeles

(33)

1516 BOM

Slee

py Valley

8/5/

82

Geop

lan,

In

c.Project

#258

12.

8555

El

iza­

be

th Lake Road,

Leon

a Valley.

Two

trenches,

14-1

5 feet deep,

nort

heas

t of

Sa

n Andreas

faul

t (C

DMG,

1979z).

No

faulting in bu

rr and

red

arko

se,

coll

uviu

m or

Ho

loce

ne alluvium (T

ar,

Tab, Qc and

Qal

of Kahle, et aj[.,

1975

).

Sleepy V

aI ley

5/

13/7

1William

Wa i sge rb

e r

and

Associates

Ref. No

. 1025-L-033-E.

Port

ion

of lo

t 18,

Tract

51U8

, south

of

Eliz

abet

h Lake,

Pine Canyon Ro

ad,

east of 87th St

. West,

Leon

a Valley.

One

tren

ch,

unsp

ecif

ied

depth, no

rthe

ast

of Le

ona

Avenue fault

(CDMG, 1979z).

faulting

in Ho

loce

ne al

luvi

um (Qal of

Kahle, et a|

.. 19

75).

No

Slee

py Va

I le

y6/

9/80

Michael

V. Sm

ith

File #8

010-

1.

Tentative

Minor

Land Di

visi

on Ma

p #12807,

Leon

a Valley.

Four

tr

ench

es,

5-16

feet de

ep,

acro

ss tr

ace

of Sa

n Andreas

fault

(CDMG, 1979z).

No

faulting in bu

rr ar

kosi

c sa

ndst

one

of Pliocene An

aver

de Fo

rmat

ion

or poorly co

nsol

i­

date

d Ho

loce

ne fan

deposits (Tab and

Qf of

Kahle, et a_

L..

1975

).

Slee

py VaI ley

1/26/78

John

D. Me

rriI

IPr

ojec

t #8U360.

Tentative

PM

#10233,

Leon

a Va

lley

.

Two

trenches,

5-13

feet de

ep,

sout

hwes

t and

northeast

of San

Andr

eas

fault

(CDMG,

1979z).

No faulting

in Ho

loce

ne fan

depo

sits

(Qf

of Kahle, et aj

.. 1975).

Slee

py VaI le

y8/

10/7

1 Jo

hn D. Me

rriI

IPr

ojec

t #11181.

Port

ions

SE 1/U

NW 1/

U and

SW 1/M

NE 1/U

section,

16,

T6N,

R1

3W,

BBM,

Le

ona

Valley.

One

trench,

unsp

ecif

ied

depth, so

uthw

est

of San

Andr

eas

fault

(CDM

G, 1979z).

Intense

fracturing,

brec

ciat

ion

and

siickensides,

but

no faulting,

in

' metagranite"

or over­

lying

allu

vial

de

posi

ts (dgn an

d Qf

or Kahle, et aj..,

1975).

Slee

py Valley

6/29

/78

John

D. Me

rril

lPr

ojec

t #8M572.

Leona

VaI ley.

One

tren

ch,

5-10 fe

et de

ep,

acro

ss Sa

n An

drea

s fa

ult

(CDM

G, 1979z).

"older"

alluvium

(Qf

or Ka

hle,

et

aj

..,

1975

).

PM #1075U,

No fa

ulti

ng in

Slee

py VaIIey

5/15

/71

WiI Ii

am W

a is

gerb

er

and

Asso

ciat

esRef. No

. 102M L

033

E.

N 1/U

of S

1/2

of E

1/2

of E

1/2

of

SW 1/

M, of NE

1/

M of

se

ctio

n 16,

T6N, R13W,

SBM, Leona

Vall

ey.

One

trench,

maximum

dept

h 9

feet

, no

rthe

ast

of San

Andr

eas

faul

t (CDMG, 19

79z)

. No

faulting in "o

lder

" or

Ho

loce

ne alluvium (Qf

and

Qpa

of Kahle, et

a_l_

., 1975).

County

(Cit

y)

of

Juri

sdic

tion

County

(Cit

y)

Fi le

Number

CDMG

AP

Fi le

Number

7-1/

2 Minute

Quadrangle( s)

Date

of

Repo

rt( s)

(Mo/

da/y

r)

Invest igat in

g F

i rm

or

Geol

og i st

Iden

tifi

cati

on Number an

d Si

te De

scri

ptio

n Where

no

City

or County Number

San

Andreas

Fault. Los

Ange

les

County (F

igs.

*4

-10)

Los

Ange

les

(3U)

Los

Angeles

(35)

Los

Ange

les

(99

B*)

Los

Angeles

(100

)1071

Los

Angeles

(36)

Slee

py V

aI ley

11/14/81

Buena

Engineers,

Inc.

Proj

ect

0B-1

925-

L01

Three

tren

ches

, U-15 feet deep,

acro

ss Le

ona

Avenue fa

ult

(CDMG, 19

79z)

. Trench C:

faulting and

fracturing in gneiss,

Pleistocene

fan

deposits and

Holo

cene

alluvium

(pis

, Qo

f, and

Qa I

of Kahle, et a_i.,

1975

).

Slee

py VaI ley

11/2

0/70

Ja

mes

E. Sl

osso

n and

Asso

ciat

esKi

rkpa

tric

k Pr

oper

ty,

Leon

a Va

I le

y

Two

tren

ches

, 10

fe

et deep,

nort

heas

t of

st

rand

of

San

Andr

eas

fault

(CDM

G, 19

79z)

. Trench 1:

no fa

ulti

ng,

but

"possible

seco

ndar

y br

eaks

in

older

alluvium associated

to the

principal

1857 trace" of

the

San

Andr

eas

(Qoa of Kahle, et a I..

1975).

Ritter Ri

dge

6/1

0/8

2B

uena

E

ngin

eers

, In

c.

Job

0B

-1985-L

01

Two

trenches,

5 to

11

fe

et

deep,

acro

ss

an

d

south

west

of

no

rth

bra

nch o

f S

an

Andre

as

fau

lt

(CD

MG

, 1979aa).

T

rench

1:

faultin

g

in

red

ark

ose

, buff

ark

ose

an

d cla

y

sh

ale

m

em

be

rs of

Plio

ce

ne

A

naverd

e

Form

ation

an

d

Holo

cene alluviu

m

(Ta

r,

Tab,

Ta

c a

nd

Q

aI

of

Ba

rro

ws,

et

a I..

19

76

).

Ritte

r R

idge

9/1

0/7

9

Mic

hael

V.

Sm

ith

File #7

946-

1

Five

tr

ench

es,

5 to 11

fe

et de

ep,

acro

ss main trace

of Sa

n Andreas

fault

(CDMG,

1979

aa).

Tr

ench

3:

Fa

ulti

ng in

Pl

eist

ocen

e Ha

rold

Fo

rmat

ion

(Qh

of Barrows,

et a I..

1976

).

Trench U:

Faulting in

re

d arkose member o

f Pl

ioce

ne Anaverde

Form

atio

n an

d older

alluvium (T

ar an

d Qoa

of Ba

rrow

s, et a I..

1976).

Trench 5:

faul

ting

in re

d ar

kose

member o

f Pl

ioce

ne An

aver

de Fo

rmat

ion

(Tar

of Ba

rrow

s,

et al

.. 19

76).

1071A

Ritter Ridge

5/29/80

Mich

ael

V. Smith

File #79«»5-1.

Parcel

1303

8, no

rth

of Avenue S,

west of Ti

erra

Su

bida

Ro

ad.

Four

tr

ench

es,

5 fe

et de

ep,

acro

ss subsidiary fa

ults

southwest

of ma

in tr

ace

of

San

Andr

eas

fault

(CDMG, 1979aa).

Tren

ch A-

1:

"probable" ve

rtic

al faulting in

older

alluvium,

but

no fa

ulti

ng in overlying

"residual

soil"

(Qoa an

d QaI

of

Barrows, et a I..

1976).

Tren

ch A-

2:

Thru

st or hi

gh an

gle

reve

rse

faul

ting

on

"p

ress

ure

ridge wh

ich

resulted fr

om te

cton

ic activity wi

thin

the

main

Sa

n An

drea

s fault

zone"

in Pleistocene

Nade

au Fo

rmat

ion

grav

els

(Qn

of Barrows,

et aj

..,

1976

).

Not

filed

with Lo

s Angeles

Coun

ty;

may

be consulted

at Buena

Engineers, U2

326

10th St

. We

st,

Lancaster,

Ca I

i f o rn

i a.

Coun

ty(C

ity)

ofJurisdiction

Coun

ty(City)

Fi le

Number

CDMG AP Fi le

Number

7-1/2

Minute

Quad

ran

g le( s)

Date

of

Report( s)

(Mo/da/yr)

Investigating

F i r

m or

Geol

og i st

Identification Nu

mber

and

Site

Description

Where

noCity or

County

Numb

er

San

Andreas Fault. Los

Angeles County (Figs. M-10)

Los

Ange

les

(37)

1088

Los

Angeles

(38)

Los

Angele

s (39)

Los

Angeles

Palm

dale

(1)

Palm

dale

(2)

Ri tte

r Ridge

9/10/79

Michael

V. Smith

File

07

9M6-

1, Tenta­

tive Minor Land Division

No.

127M9, Palmdale.

Five

tr

ench

es,

5-13

fe

et de

ep,

across Sa

n An

dreas

and

subsidiary fault

(CDM

G,

1979

aa).

Tr

ench

es 3,M,5:

Faul

ting

in red

arko

se of

Pliocene Anaverde Formation,

Plei

stoc

ene

Haro

ld Fo

rmat

ion

and

older alluvium (T

ar,

Qh and

Qoa

of Ba

rrow

s,

et a I..

1976).

Surf

ace

expressions of

re

cent

faulting,

as "c

lose

d de

pres

sion

s,

trou

ghs,

of

fset

dr

aina

ge,

shatter

ridg

es an

d ponded alluvium" observed on si

te.

Appa

rent

of

fset

s in Ho

loce

ne alluvium observed

in immediate

vicinity of si

te

(Qal

of

Barrows, et

a I..

1976).

Ritter Ri

dge

7/17/79

Michael

V. Sm

ith

File #7

932-

1.

Tentative

Trac

t Map

3750

2, Palmdale,

Two

tren

ches

an

d si

x test pi

ts,

6-13

fe

et deep,

acro

ss tr

ace

of unnamed

faul

t (N

adea

u fa

ult

?) so

uthw

est

of ma

in trace

of Sa

n Andreas

fault

(CDMG, 1979aa).

No fa

ulti

ng

in Ho

loce

ne alluvium (Q

al of

Ba

rrow

s, et

a I.

. 19

76).

Ri tte

r Ridge

5/73

Su

pple

­ ment:

7/25

/73

Buen

a Engineers,

Inc.

Job

0B3-1200-L01,

Trac

t No.

2931

3, Palmdale.

One

tren

ch,

6-1U

fe

et de

ep,

across Nadeau fault

(CDM

G, 1979aa).

No faulting

in fa

nglo

mera

te or

alluvium (Qof (?)

or Qoa

(?)

and

Qal

of Ba

rrow

s, et

a I.

. 1976).

Ritter Ridge

8/77

Buena

Engineers,

Inc.

Job

0B-H

4I48

-L01

, 36

305

El Camino Drive,

Pa Imd

a I e

One

tren

ch,

6-12

feet deep,

southwest of

Sa

n An

drea

s fault

(CDM

G, 1979aa).

No

faul

ting

in

quartz mo

nzon

ite

bedrock or

Ho

loce

ne alluvium (gn

(?)

and

Qal

of

Barrows, et

a I.

. 1976).

Palmdale

8/2U/79

Mich

ael

V. Smith

File 07

9U8-

1

Nine

tr

ench

es,

maximum de

pth

10 feet,

acro

ss Cemetery fault

(CDMG, 1979bb).

Tren

ch 1:

faul

ts placing

buff

arkose member of

Pliocene Anaverde Formation

agai

nst

older alluvium (T

ab an

d Qo

a of

Barrows, et a I.

. 19

76).

Trench 2:

shea

ring

an

d fa

ulti

ng in

bu

ff ar

kose

member of

Pliocene Anaverde Formation;

faulting in

older alluvium (T

ab an

d Qo

a of Barrow

s, et

a I.

. 19

76).

Tr

ench

8:

faulting in

older al

luvi

um,

but

no fa

ulti

ng in

overlying

Holocene alluvium

(Qoa

an

d Qal

of Barrows, et a I..

1976).

Pa Imda le

1/13/81

Mich

ael

V. Sm

ith

File

080UM-1

Three

tren

ches

, 5

to 12 feet deep,

acro

ss projec

ted

trace

of Littlerock fault

(CDMG, 1979bb).

Tren

ch 3:

faul

ting

in

bu

ff ar

kose and

clay shale

memb

ers

of

Pliocene Anaverde Formation.

No fa

ulti

ng in

overlying

older alluvium (Tab,

Tac

and

Qoa

of Barrows, et a I..

1976).

County

(Cit

y)of

Juri

sdic

tion

County

(City)

Fi le

Number

CDMG AP Fi le

Numbe r

7-1/2

Minute

Quad

ran

g le( s)

Date

of

Repo

rt( s)

(Mo/da/yr)

Investigating

F i r

m or

Geol

og i st

Identification Nu

mber

and

Site De

scri

ptio

n Wh

ere

noCity o

r County Nu

mber

San

Andreas Fa

ult.

Los

Angeles County (Figs. U-10)

Los

Angele

s (U

1 )

Los

Angeles

(U2)

320

fo

Los

Angele

s (U

3)

576

Los

Ange

les

(101 B*

)

Los

Angeles

(102

)

Los

Angeles (1

03 B*

)

Palmdale

2/11

/7U

Buena

Engineers,

Job

#BU-1271-L01,

Inc.

Antelope Valley Press

Property,

1U50 feet

nort

h of

Avenue "S"

between Sierra Hw

y.

and

Tenth

Street East,

PaImdale

One

trench,

2-9

feet

deep,

northeast of

Littlerock fault

(CDM

G, 1979bb).

Nosh

ear

zones

or faulting in

Pl

ioce

ne Anaverde Fo

rmation

or Holocene alluvium

(Ta

and

QaI

of Ba

rrow

s, et

a I..

1976).

PaIm

dale

8/2

14

/76

M

oo

re

and

T

ab

er

Job

#117

6-50

6, Palmdale

General

Hospital,

1215 E,

Avenue "S", Palmdale

One

trench,

U-5

feet de

ep,

acro

ss trace

of fa

ult

northeast and

para

llel

to

Li

ttle

rock

fault

(CDMG, 19

79bb

).

Faul

ting

, sh

earing,

siickenslides and

gouge

in pi

nk to light

gray arkosic

sand

ston

es of the

Pliocene An

aver

de Fo

rmat

ion

and

over

lyin

g Ho

loce

ne alluvium (Tab an

d QaI

of Ba

rrow

s, et

a I.

. 19

76).

PaImdale

6/2/

77Lamar-Mer i fi

eld

Job

0PAL-U,

Trac

t 31

919,

Lot

8

Ten

test

pi

ts,

maximum depth

7 fe

et,

sout

hwes

t of

Cemetery fault

(CDMG, 1979bb).

No fa

ulti

ng in

granitic be

droc

k or

overlying Holo

cene

colluvium (gr

and

Qsw of

Barows,

et a

I ..

1976).

PaIm

dale

12/1

3/79

Michael

V. Sm

ith

File #7956-1

Twel

ve tr

ench

es,

3 to 7

feet deep,

acro

ss Littlerock fa

ult

(CDMG, 1979bb).

Faulting,

with at

least

nine

significant

faults,

in red

arkose member of Pl

io­

cene

Anaverde Formation, "o

lder

alluvium an

d colluvium" (T

ar,

Qsw

of Ba

rrow

s,

et al.. 1976).

PaIm

dale

5/8/

80Michael

V. Smith

File

#7

972-

2

Two

tren

ches

, 5

feet

de

ep,

acro

ss Littlerock an

d subsidiary faults (CDMG, 1979bb).

Tren

ch 1:

red

arko

se member of

Pliocene Anaverde

Formation

in fault

cont

act

with

Plei

stoc

ene

Nade

au gr

avel

an

d Holocene alluvium (T

ar,

Qn and

QaI

of Ba

rrow

s, et a I.

. 1976).

Another fa

ult

present

plac

ing

Haro

ld Form

atio

n (P

elon

a Senistbearing me

m­

ber)

ag

ains

t Pleistocene

Nade

au Gr

avel

(Q

hp an

d Qn of

Ba

rrow

s, et

a I.

. 1976).

Pa Imd

a I e

10/26/79

Michael

V. Sm

ith

File £7

949-

1

Two

tren

ches

, maximum de

pth

5 fe

et,

nort

heas

t of main trace

of San

Andreas fa

ult

(CDMG, 1979bb).

Tren

ch 1:

Faul

ting

an

d fracturi

ng in "b

uff

arkose"

member of

Plio

cene

Anaverde Fo

rmat

ion

(Tar

of

Barrows, et

a I.

, 1976).

* No

t filed

with Lo

s An

gele

s Co

unty;

may be consulted at

Buena

Engineers, U2326

10th St.

West,

Lancaster,

CaIi for

nia.

Coun

ty

(City)

of

Juri

sdic

tion

County

(Cit

y)Fi le

Numb

er

CDMG AP Fi le

Number

7-1/

2 Mi

nute

Qu

adra

ngle

(s)

Date

of

Report(s)

(Mo/

da/y

r)

Inve

stig

atin

g Fi

rm or

Ge

olog

ist

Iden

tifi

cati

on Number a

ndSite Description

Wher

e no

City o

r County N

umber

ro ON

San

Andreas

Faul

t. Lo

s Angeles

County (F

igs.

4-101

Los

Angeles

(44)

1373

Los

Angeles

(45)

Los

Angeles

(46)

914

Los

Angeles

Los

Angeles

(48)

1439

Los

Angeles

(49)

Los

Angeles

(104

)

913

913

PaIm

da le

8/28/78

Mich

ael

V. Smith

File

#78-20,

3622

2 32nd St.

East,

PaImdale

Two

tren

ches

, 2

1/2

- 5

feet

de

ep,

acro

ss projected

trace

of Li

ttle

rock

fault

(CDM

G, 19

79bb

).

Tren

ch 1:

faul

ting

in ar

kpsi

c sandstone* of Pl

ioce

ne Anaverde

Formation, bu

t no fa

ulti

ng

in ov

erly

ing

Pleistocene

Nade

au Formation

grav

els

(Ta

and

Qn of

Ba

rrow

s, et

a I..

1976

).

Pa Imd

a I e

3/25/81

Buena

Engi

neer

s,

Inc.

Job

#B-1

831-

L01,

Ta

x Parcels

3052-18-5

and

3-52

-18-

6,

PaImda le

Thre

e trenches,

3-6

feet de

ep,

acro

ss Littlerpck

fault

(CDM

G, 1979bb).

Trenches 1,

2:Red

arko

se member o

f Pliocene Anaverde Formation

in fault

contact

with

Pleistocene

Nade

au sandy

grav

els

(Tar a

nd Qn o

f Barrows, e t

a I..

1976

).

Tren

ch 3:

Fr

actu

ring

,but

no ap

pare

nt faulting

in Anaverde Formation

(Ta

of Ba

rrow

s, et

a I..

1976

).

PaIm

da le

11/2

1/78

Michael

V. Smith

File #78-35,

3401 Av

e T-

6 Ea

st,

PaIm

dale

One

tren

ch,

maximum

depth

8 fe

et,

southwest

of Li

ttle

rock

fault

(CDM

G, 19

79bb

).No

fa

ulti

ng in Pl

ioce

ne Anaverde Fo

rmat

ion

or Ho

loce

ne alluvium (T

ar a

nd QaI

ofBa

rrow

s, et

a I..

1976).

PaImda le

2/8/71

Robe

rt St

one

and

Associates,

Inc.

Job

#1-0

-017

0-02

. Tr

act

26272, Old

Nade

au Road,

PaImdale.

Thirty-nine

tren

ches

, ma

ximu

m depth

15 fe

et,

acro

ss Na

deau

and

subsidiary fa

ults

(C

DMG,

19

79bb

).

Trenches 2,

13,1

7,27

,28,

34,3

6,37

,38,

39:

shea

ring

and

faul

ting

with up

to

18

in

ches

of

fset

in

Pl

ioce

ne Pu

nchb

owl

Form

atio

n and

older al

luvi

um

(Tjh

and

Qoa

of Barrows,

ejt

aj...

1976

).

PaIm

dale

1/26/79

Michael

V. Smith

File

#7904-1, Ta

x Pa

rcel

3052-

17-7

, 3315 Ave

T-8, East Palm-

da le

One

trench,

maximum

depth

8 fe

et,

northeast

of San

Andr

eas

fault

(CDM

G, 19

79bb

).

No fa

ulti

ng in slope

wash or

Ho

loce

ne al

luvi

um (Q

sw a

nd QaI

of Barrows, et al

..

1976

).

PaIm

dale

1/24

/79

Michael

V. Smith

File

#7902-1

Two

trenches,

max

imum

depth

3

1/2

fe

et,

nort

h o

f Littlero

ck fa

ult

(CM

DG

, 1

97

9b

b).

T

ren

ch

es

1-2

: no

fa

ultin

g

in

base

ment

gra

nite o

r H

olo

cene alluviu

m (g

r and

QaI

o

f B

arr

ow

s,

et

a I..

19

76

).

PaImdale

1/24/79

Michael

V. Sm

ith

File

#7902-1, Tr

act

No.

1227

5,

PaIm

dale

Two

trenches,

2 -

3-1/2

feet de

ep,

northeast

of Li

ttle

rock

fault

(CDM

G, 19

79bb

).

No fa

ulti

ng

in granitic bedrock

or o

verl

ying

Ho

loce

ne al

luvi

um (gr

and

Qa I

of

Barrows, et

a I..

1976

).

Coun

ty

(Cit

y)of

Juri sd iction

County

(City)

Fi le

Numb

e r

CDMG AP Fi le

Numb

er

7-1/2

Minu

te

Quad ran

gle(

s)

Date

of

Report(s)

(Mo/

da/y

r)

Inve

st iga

t ing

F i r

m or

Ge

olog

i st

Iden

tifi

cati

on Number a

ndSite Description

Wher

e no

City o

r County Nu

mber

San

Andr

eas

Faul

t. Lo

s Angeles

County (F

igs.

U-10)

Los

Angeles

(105 B*

)

Los

Angeles

(106

)1072

Los

Angeles

(50)

Los

Angeles

(51)

Los

Angeles

(52)

924

1267

Los

Angeles

(53)

1027

Los

Ange

les

(54)

1453

PaImda le

6/2/81

Buena

Engineers,

Inc.

Job

#186

0-L0

1

One

tr

en

ch

, 5

to

6 fe

et

deep,

acro

ss

tra

ce

of

Little

rock fa

ult

(CD

MG

, 1979bb).

F

aultin

g

in

red

ark

ose

mem

ber

of

Plio

ce

ne

A

naverd

e

Form

ation,

old

er

alluviu

m

and

Holo

cene alluviu

m

(Ta

r,

Qoa

a

nd

Q

aI

of

Barr

ow

s,

eta

I..

19

76

).

PaIm

dale

10/16/79

Michael

V. Smith

File

#7916-1

Seven

trenches,

5 fe

et de

ep,

acro

ss Na

deau

faul

t.(CDMG, 19

79bb

).

Tren

ch 5:

normal faulting with a

minimum

of tw

o fe

et of di

spla

ceme

nt in

lake and

un-

differentiated deposits of

Pl

eist

ocen

e Ha

rold

Formation

but

no faulting

in

over

lyin

g older

fan

deposits (Qhl,

Qh and

Qof

of Barrows, et a I..

1976

).

PaImdale

8/1/

77Buena

Engineers,

Inc.

Job

0B-1454-L01

Ave. T-

4 and

36th St.

East

, PaImdale

One

trench,

8 feet de

ep,

nort

heas

t of

Li

ttle

rock

fault

(CDM

G, 19

79bb

).

No fa

ulti

ng

in gravelly sands

(Nadeau

Form

atio

n ?) or

"sandy

silts" (H

oloc

ene

allu

vium

?) (Qn

and

Qa I

of Ba

rrow

s, et

a

I . .

1976

).

Pa I mda

I e7/26/78

Michael

V. Smith

File

#7

8-17

, 35

40 A

ve.

T-6

East,

Pa I mda

I eOn

e trench,

5 fe

et de

ep,

southwest

of Littlerock fault

(CDM

G, 19

79bb

).

No faulting

in Pliocene Anaverde Formation

or Ho

loce

ne alluvium (T

ar and

QaI

of Barrows, et a I..

1976

).

PaIm

dale

10/30/79

Michael

V. Smith

File

#7

953-

1, 37

44 A

ve.

T-8

East,

Pa ImdaIe

One

tren

ch,

6 fe

et de

ep,

northeast

of Li

ttle

rock

fault

(CDM

G, 19

79bb

).

Poss

ible

fa

ulti

ng

in buff ar

kose

of

Pliocene Anaverde Formation, but

no fa

ulti

ng

in ol

der

or Ho

loce

ne al

luvi

um (T

ab,

Qoa

and

QaI

of Ba

rrow

s, et

a I..

1976

).

PaImdale

8/14/79

Michael

V. Smith

File #7

943-

1, 36U7 Ave

T-8

East

, Pa

Imda

le

One

tren

ch,

5 fe

et de

ep,

sout

hwes

t of Li

ttle

rock

fault

(CDM

G, 1979bb).

No faulting

in Pliocene Anaverde Formation

or Ho

loce

ne alluvium (Tar and

QaI

of Ba

rrow

s, et

a I..

1976

).

PaIm

dale

4/2/

82Buena

Engineers,

Inc.

Job

#B-1

967-

L01,

Tr

act

No.

13U35

Five

tr

ench

es,

4-6

feet

de

ep,

acro

ss trace

of Littlerock and

subsidiary fa

ults

(C

DMG,

1979bb).

Numerous fa

ults

, gouge

and

shea

r zones

in Pliocene An

aver

de

Formation

and

olde

r alluvium (Tar an

d Qoa

of Barrows, et a I..

1976

).

* Not

filed

with

Los

Angeles

County;

may

be consulted

at Buena

Engi

neer

s, 42

326

10th St

. West,

Lancaster,

Ca I

i fornia

.

Coun

ty

(Cit

y)or

Ju

risd

icti

on

County

(City)

Fi le

Numb

er

CDMG AP Fi le

Numb

er

7-1/2

Minu

te

Quad

rang le( s)

Date

of

Report( s)

(Mo/da/yr)

Inve

stig

atin

g F

i rm or

Ge

olog

i st

Identification Number and

Site Description Where no

City or County Number

Is) oo

San

Andreas Fa

ult.

Los

Ange

les

County (Figs. U-10)

Los

Angeles

(55)

Los

Angeles

(56)

Los

Ange

les

(57)

Los

Angeles

(58)

Los

Ange

les

(59)

Los

Angeles

(60)

Los

Angeles

(61)

1039

1026

809

837

PaIm

da le

11/13/78

Michael

V. Smith

File #7

8-33

, 38

22 Av

e. T-8

East

, Palmdale

One

trench,

maximum depth 7

feet,

northeast of

Littlerock fa

ult

(CDM

G, 1979bb).

No faulting

in Pl

ioce

ne An

aver

de Fo

rmat

ion

or ov

erlying

older alluvium (Ta

and

Qoa

of Ba

rrow

s, et

a I..

1976).

Pa Imd

a I e

3/19

/80

Michael

V. Sm

ith

File

#8

005-

1, Tax

Parc

el No.

3052-25-9, 35

848

UOth St

. East,

PaImdale

Three

trenches,

maximum de

pth

7 fe

et,

southwest

of Littlerock fault

(CDMG, 1979bb).

Tren

ches

1-

3:

Norm

al faulting an

d fa

ult

goug

e in red

arkose of Pl

ioce

ne Anaverde

Form

atio

n and

older alluvium (T

ar an

d Qo

a of

Ba

rrows, et

a

I ..

1976).

PaIm

dale

10/11/78

Michael

V. Smith

File #7

8-26

, 35

808

«l2n

d St.

East,

PaImdale

One

tren

ch,

U-8

feet deep,

sout

hwes

t of Littlerock fa

ult

(CDMG, 1979bb).

No

faulting in

red

arkosic

unit

of

Pliocene Anaverde Fo

rmat

ion

(Tar

of

Ba

rrow

s,

et al.. 1976).

PaIm

dale

7/23/71

John 0.

Nigra

Proj

ect

#177-6U2,

1310 Palm-

dale

Hi

lls

Driv

e, Palmdale

Thre

e trenches,

maximum depth

12 fe

et,

northeast of

main trace

of San

Andreas

faul

t (CDMG, 1979bb).

No faulting

in Pl

eist

ocen

e fanglomerate or overlying

sandy

clay

(Qn

and

Qhl

or Qh

p of Barrows, et

a I..

1976).

Pa Imd

aIe

6/26/78

Michael

V. Sm

ith

File #78-11,

East side of

Al

Ida

Lane

, 100

feet

north

of Palmdale

Hills

Estates.

One

trench,

6 1/2

feet deep,

nort

heas

t of ma

in trace

of San

Andreas fault

(CDMG,

1979

bb).

Folding

but

no faulting in

Pl

ioce

ne Upper Anaverde Formation (Tac of

Barr

ows,

et a I..

1976).

PaImdale

1/2/

78Mi

chae

l V.

Sm

ith

File #7

8-U,

Pa

rcel

11

, north­

west corner of Palmdale Hi

lls

Drive

and

Alid

a Lane in

Pa

lm-

dale Hills

Estates

One

trench,

maximum de

pth

8 1/2

feet,

nort

heas

t of main trace

of San

Andreas

faul

t (CDMG, 19

79bb

).

No fa

ulti

ng in

Pl

eist

ocen

e siltstone

and

sandstones

(Qhp of Barrows, et a I..

1976).

PaImdale

3/3/

78

John

0

Nigra

Proj

ect

#278-912,

35532

Alid

a La

ne,

Palmdale

Three

tren

ches

, av

erag

e de

pth

6 feet,

adjacent to

trace

of subsidiary fa

ult

nort

heas

t of

Sa

n Andreas fault

(CDMG, 1979bb).

No ev

iden

ce of

faulting

in

Pleistocene

conglomerate (Qn

or Qh

p of Barrows, et a I.

. 19

76).

County

(City)

ofJurisdiction

County

(Cit

y)File

Number

CDMG AP Fi le

Number

7-1/

2Mi

nute

Quad

ran

g le

( s)

Date

of

Repo

rt( s)

(Mo/da/yr)

Investigating

F i r

m or

Geolog i st

Iden

tifi

cati

on Number an

dSite De

scri

ptio

n Where

noCi

ty or County Number

San

Andr

eas

Fault. Los

Angeles

County [F

igs.

U-

10)

Los

Angeles

(62)

Los

Angeles

(63)

to

\o

Los

Angeles

(6U)

1157

Los

Ange

les

(65)

Los

Angeles

(66)

Los

Ange

les

(107)

PaImdale

8/16

/71

John

0. Nigra

Proj

ect

#178-6*45, Lot

6 at

Alida

Lane

, Pa

Imda

le

Four

tr

ench

es,

maximum

dept

h 13

feet,

acro

ss trace

of su

bsid

iary

fault

northeast

of San

Andreas

faul

t (C

DMG,

1979bb).

Tren

ches

1-

U:

Faulting and

gouge

zones

in

macerated

granitic bedrock

(gr

of Ba

rrow

s, et a I.

. 19

76).

No

faulting in

ov

er­

lyin

g Pelona Sc

hist

de

rive

d conglomerate (Q

n (?)

of Barrows, et a I.

. 1976).

Ex­

tension

of the

fault

line

, as

determined by tr

ench

ing,

to

outcrop

shows

Pleisto­

cene te

rrac

e conglomerate faulted

against

light-colored

igneous

rock (Q

hp,

Qn (?)

and

gr of Barrows, et a I.

. 19

76).

PaImdale

6/2/

80Mi

chae

l V.

Sm

ith

File #7

916-

3.

Wesl

eyan

Hi

lls

Prop

erty

, Tentative

Trac

t No.

«4011«4.

Four

tr

ench

es.

3-5

feet de

ep,

acro

ss main trace

of San

Andr

eas

and

subsidiary fa

ults

(CDMG, 1979bb).

Tren

ch 1:

shearing an

d fa

ulti

ng in

lake de

posi

ts of upper

Pleis­

tocene Ha

rold

Fo

rmat

ion

and

older

alluvium (Qhl and

Qoa

of Barrows, et aj

. 1976).

Trench 2:

Fa

ults

pl

acin

g undifferentiated member and

lake deposits of upper

Pleis­

tocene Ha

rold

Fo

rmat

ion

agai

nst

olde

r al

luvi

um (Q

h, Qhl

and

Qoa

of Ba

rrow

s, et a

I.

1976

).

Tren

ches

3,*4:

faulting in

Pleistocene

boul

der

gravels

and

older

alluvium

(Qbg

and

Qoa

of Ba

rrow

s, et

a

1. 1976).

PaImdale

3/25

/80

Mich

ael

V. Sm

ith

File #8008-1, 56

30 Barrel

Spri

ngs

Road

, Pa

Imda

le

One

tren

ch,

maximum

dept

h 7

feet,

sout

hwes

t of

main trace

of San

Andreas

faul

t (C

DMG,

1979bb).

No faulting in

Pl

eist

ocen

e Ha

rold

Fo

rmat

ion

or Holocene alluvium

(Qhg and

QaI

of Barrows, et aj.

1976

).

Li ttl

eroc

kU/30/80

Mich

ael

V. Smith

File

#7

916-

2.

pert

ies

Ltd.,

No.

M0113.

Pa I ma

i re

Tentative

Pro-

Tract

Five

tr

ench

es,

3-6

feet

deep,

acro

ss tr

ace

of Li

ttle

rock

fa

ult

or southeastern ex­

tension

of Ce

mete

ry fa

ult

(CDM

G, 19

7«4f

f).

Trench 1:

"pro

babl

e faulting in

Holocene

fan

depo

sits

" (Q

sw of Ba

rrow

s, 1979a).

Tren

ch 2,3,U:

faulting,

shearing,

jointing

and

offs

et ap

lite

di

ke in

gr

anit

e (h

qm of Ba

rrow

s, 19

79a)

.

Juniper

Hill

s U/

26/7

U Jo

hn D. Me

rril

lProject

#142

293,

Parcel Map

4072,

Sout

h 10

6th

Street East,

Vicinity of Littlerock

Three

tren

ches

, un

spec

ifie

d depth, ac

ross

San

Andr

eas

fault

(CDM

G, 197Ucc).

Tren

ches

1,

2:

faulting

in gr

anit

ic and

meta

morp

hic

bedrock

and

overlying

Holo

cene

al

luvi

um (qd

and

QaI

of Barrows, 19

79a)

.

Va I ye

rmo

2/21

/80

Michael

V. Smith

File

#7969-1

Two

tre

nch

es,

5 to

6

feet

de

ep

, a

cro

ss

subsid

iary

fa

ult

nort

heast

of

ma

in

trace

of

San

A

nd

rea

s fa

ult

(CD

MG

, 19

7«4s

).

Tre

nches

1,2

: fa

ultin

g

in

Holo

cene

alluviu

m

(Qal

of

Ba

rro

ws,

19

79

b).

County

County

CDMG

(City)

(City)

AP

7-1/2

of

File

File

Minute

Juri

sdic

tion

Number

Numb

er

Quad

ran

g le( s)

San

Andr

eas

Fault. Lo

s Anqeles

County (F

igs.

Date

of

Repo

rt ( s)

(M

o/da

/yr)

4-10

)

Invest i gat in

g F

i rm or

Geologist

Iden

tifi

cati

on Nu

mber

and

Site

De

scri

ptio

n Where

no

City or

County Number

Los

Ange

les

(68)

1317

Los

Ange

les

(69)

1178

Los

Ange

les

(70)

Los

Ange

les

(71)

1230

Los

Ange

les

(72)

Los

Ange

les

(73)

143

147

Michael

V. Smith

Four

tr

ench

es,

5-9

feet de

ep,

south

of Ho I comb fault

(CDMG, 19

74s)

. Ho

loce

ne colluvium

or alluvium (Q

sw and

QaI

of Ba

rrow

s, 1979b).

VaI ye

rmo

3/27

/80

Michael

V. Smith

File #8024-1.

Tentative

PM

No fau11

i ng

in

17300

Big

Pines

File #8

006-

1.

Hwy,

VaI yermo.

One

tren

ch,

maximum

dept

h 7

feet,

sout

hwes

t of

main trace

of Sa

n An

drea

s fa

ult

(CDMG,

1974

s).

No fa

ulti

ng in

"o

lder

" fan

depo

sits

or Ho

loce

ne co

lluv

ium

(Qsw

(?)

and

QaI

of

Barrows, 19

79b)

.

VaI ye

rmo

4/22/80

Allan

E. Se

ward

Job

#0-257-6.

17610

Big

Pines

Hwy,

Va

Iyer

mo.

Three

trenches,

maxi

mum

dept

h 8

1/2

feet

, northeast

of main trace

of Sa

n Andreas

fault

(CDMG, 19

74s)

. Tr

ench

es 1-

3:

Fracturing,

but

no faulting in older

alluvium (Q

oa of

Ba

rrow

s, 1979b).

Mesc

a I Cr

eek

9/10/80

Michael

V. Smith

File #8

028-

1.

Harmony

Pines

Camp,

Wrig

htwo

od.

One

tren

ch,

7 fe

et de

ep,

northeast

of San

Andr

eas

fault

(CDM

G, 1974dd).

No

faulting in

Ho

loce

ne al

luvi

um (Qal of Ro

gers

, 19

67).

Mesc

aI Creek

1/20

/81

RyI a nd-Cumm

i ng s,

Inc.

Project

#80-27-03.

Moun

t Ka

re Camp,

Wrig

htwo

od.

Four

trenches,

6-8

feet de

ep,

acro

ss Sa

n An

drea

s fault

(CDM

G, 1974dd).

Trench

1 excavated

acro

ss pr

omin

ent

trou

gh cr

eate

d by

eros

ion

alon

g San

Andr

eas.

Th

e "change

in st

rati

fica

tion

of

al

luvi

um an

d cr

ushe

d granite

bedrock" us

ed as

ev

i­

dence

for

pres

ence

of fault

(pGc an

d Qal

of Ro

gers,

1967

).

Tren

ches

3,4:

goug

e and

shea

r zo

nes

in fr

actu

red

gran

ite

bedr

ock,

but

no faulting in

Holocene

allu

vium

(p

Ce an

d Qal

of Rogers,

1967

).

Mesc

aI Creek

8/1/75

Rich

ard

G. Me

adMo

unt

Kare Camp,

Wrig

htwo

od

One

trench,

12-1

4 feet deep,

sout

hwes

t of

Sa

n Andreas

fault

(CDM

G, 19

74dd

).

No

faulting in

Ho

loce

ne al

luvi

um (Qal of Rogers,

1967).

MescaI Cr

eek

8/15

/75

Earl R. Mo

rley

, Jr.

Proj

ect

#440

-85.

Camp

Comm

erce

, Wrightwood.

Thre

e tr

ench

es,

maximum

dept

h 10 fe

et,

acro

ss Sa

n Andreas

fault

(CDMG, 1974dd).

Tren

ch 1:

"rock

flour, pr

esen

ce of badly

oxid

ized

orange-brown cl

ay,

silt

fa

ult

gouge

and

siic

kens

lide

d my

loni

te greenschist" st

ated

as evidence fo

r fa

ulti

ng in

greenschist

bedr

ock

(?)

(m of Rogers,

1967

).

Tren

ches

2,3:

frac

turi

ng an

d shearing in gr

anit

e gneiss (pCc of

Ro

gers

, 19

67).

Coun

ty

(Cit

y)

of

Juri

sdic

tion

San

Andreas

Los

Angeles

Los

Angeles

Coun

ty

(City)

Fi le

Numb

er

Faul

t.

(7«4

)

(75)

CDMG

AP

Fi le

Number

Los

Anqeles

579

1U02

7-1/

2 Mi

nute

Qu

ad ran

g le( s)

County (Fiqs.

14

Mount

San

Anto

nio

Thre

e trenches,

No faulting

in

Mount

San

Anto

nio

Date of

Repo

rt( s)

(Mo/da/yr)

-10) 7/

28/7

7

10-13

feet

Ho

loce

ne al

7/29/81

Investigating

F i r

m or

Geol

og i st

Pion

eer

Cons

ulta

nts

deep

, southwest

of San

luvium (Qal of Ro

gers

,

Alie

n E

. Sewa rd

Iden

tifi

cati

on Number and

Site Description

Wher

e no

City

or

County

Number

Job

#272

3-00

1.

Hoi id

ay

Hill Sk

i Li

ft,

Wrig

htwo

od.

Andreas

faul

t (CDMG, 197Uee).

1967

). Job

/(M-289-U.

Tent

ativ

e Tract

No.

U1777.

Wrightwood.

Fort

y-s

ix

tre

nch

es,

max

imum

depth

12

fe

et,

south

west

of

San

A

nd

rea

s fa

ult

(CD

MG

, 197U

ee).

N

o fa

ultin

g

in

Ho

loce

ne

a

llu

viu

m

(Qal

of

Rogers

, 1

96

7).

,0*

F1g.

10

-

Loca

tions

of

engi

neer

ing

geol

ogy

report

s al

ong

San

And

reas

fa

ult b

etw

een

Utt

lero

ck

and

Tel

egra

ph

Peak

ar

eas

by L

os

Ang

eles

an

d Sa

n B

erna

rdin

o C

ount

y nu

mbe

rs.

See

Fig

. 1

for

loca

tion

and

Fig

. 2

for

exp

lanatio

n o

f sy

mbo

ls.

to

Bra

nch Sou

th B

ranc

h

Fig

. 11

-

Loca

tions

of

en

gin

ee

rin

g

geol

ogy

report

s al

ong

San

And

reas

fa

ult b

etw

een

Dev

ore

and

San

Gor

goni

o M

oun­

ta

in

area

s by

San

B

erna

rdin

o C

ount

y an

d C

ity (*

) nu

mbe

rs.

See

Fig

. 1

for

loca

tion

and

Fig

. 2

for

ex­

pla

natio

n o

f sy

mbo

ls.

U)

45^ >

%**

%¥<

-- v1

$ feM

l^^v

^R

M^

'^^^'^

^^l^

if^

,-«; ,

/) ;A

>K

.,,(

':y^^

r^g

o*:

;-

/Vfv

: >

...

- V

-.,-

'-?

-^

ot i*

Tv~

?v^ .

^fe^s

aR

S^

Fig

. 12

-

Lo

catio

ns

of

en

gin

ee

rin

g

geol

ogy

rep

ort

s al

ong

San

And

reas

fa

ult in

west

ern

Sa

n B

ern

ard

ino

ar

ea

by

San

Be

ma

rdin

o

Cou

nty

and

City

(*

) nu

mbe

rs.

See

Fig

. 11

fo

r lo

cation

and

Fig

. 2

for

exp

lanatio

n o

f sy

mbo

ls

u>

Fig

. 13

-

Loca

tions

of

en

gin

ee

rin

g

geol

ogy

rep

ort

s al

ong

San

And

reas

fa

ult 1

n east

ern

San

Bem

ardi

no

area

by

San

Ber

nard

)no

Cou

nty

and

City

(*

) nu

mbe

rs.

See

Fig

. 11

fo

r lo

catio

n

and

Fig

. 2

for

exp

lanatio

n o

f sy

mbo

ls

County

(Cit

y)of

Juri

sdic

tion

County

(Cit

y)Fi le

Numb

er

CDMG AP Fi le

Numb

er

7-1/

2 Mi

nute

Qu

ad ran

gle(

s)

Date of

Repo

rt(s

)(Mo/da/yr)

Investigating

F i r

m or

GeoI

og i st

Iden

tifi

cati

on Nu

mber

and

Site Description

Wher

e no

City o

r County Nu

mber

to

San

A

ndre

as

Fault.

San

B

ern

ard

I n

o

County

(F

igs.

10-1

U1

San

B

ern

ard

ino

(1)

1U9

San

B

ern

ard

ino

(2

) 91

(Sa

n B

ern

ard

ino)

(3*)

6U

9

(San B

ern

ard

ino)

(5*)

1

50

7

(San B

ern

ard

ino)

(6*)

1U

98

(San

Bern

ard

ino)

(7*)

1

09

6

(San

Bern

ard

ino)

(8*)

1

02

0

(San

Be

rna

rdin

o)

(9*)

6U

7

Mo

un

t S

an

Anto

nio

10/1

0/7

1

R.G

. M

ead

Trac

t No

. 5383

Tren

ch up

to

9

feet deep northeast

of Sa

n Andreas

faul

t (C

DMG,

19

7Uee

), no

fa

ulti

ng in

so

il and

allu

vium

.

Moun

t Sa

n Antonio

10/17/7U

R.G. Me

adTr

act

No.

2UOO

Trench,

average

dept

h 10 fe

et,

directly northeast

of San

Andreas

fault

(CDM

G,

197Uee), no fa

ulti

ng in

soil an

d talus.

Devo

re11

/15/

77

G.A. Cl

opin

e 02/17/81

Lake De

vore

Mo

bile

Ho

me

Esta

tes

Tren

ch,

aver

age

depth

10 fe

et,

acro

ss To

kay

Hill fault

(CDM

G, 19

7Umm

), fa

ulti

ng

in "Quaternary

olde

r alluvium."

De

vore

San

B

ern

ard

ino

Nort

h

7/1

7/8

1G

ary

S

. R

asm

uss

en

an

d

Asso

cia

tes

Pro

ject

#1

73

8-2

Tre

nches,

avera

ge

depth

10

fe

et,

acro

ss

str

an

ds o

f S

an

An

dre

as fa

ult

(CD

MG

, 197U

mm

,nn),

fa

ults

1 fo

ot

wid

e

in old

er

alluviu

m,

3 fe

et

vert

ical

off

se

t.

San

B

ern

ard

ino

N

ort

h1

1/1

9/8

0

Ga

ry

S.

Ra

smu

sse

n

and

Asso

cia

tes

Pro

ject

#1639-2

Cu

ts

an

d

tre

nch

es

acro

ss

str

ands o

f S

an

Andre

as fa

ult

(CD

MG

, 1

97

Un

n),

g

ou

ge

and

fra

ctu

res

in gra

nite

an

d

allu

viu

m

"as old

as

mid

-Ple

isto

cene."

San

B

ern

ard

ino

N

ort

h1/28/80

Leig

hton

an

d As

soc ia

tes

Project

#679662-01

Tren

ch up

to

11

fe

et deep south

of Sa

n An

drea

s fault

(CDM

G, 19

7Unn

), no

fa

ulti

ng

i n Ho

Iocene

a I I

uv i ur

n.

San

Bern

ardi

no

North

8/1/

79G.A. Cl

opin

e60

80 State

High

way

18

Tren

ches

, 5

feet de

ep,

acro

ss North

Bran

ch San

Andr

eas

fault

(CDM

G, 197*»nn),

Ho Ioc

ene

alluvium fa

ulte

d ag

ains

t qu

artz

monzonit

e.

San

Bernardino

Nort

h1/1/78

3/19/78

6/2U

/78

G.A. Cl

opin

eTr

acts

10

19U,

10

258,

and

10259

Trenches up

to

12

.5 fe

et de

ep ac

ross

San

Andr

eas

fault

(CDM

G, 19

7Unn

), 2

feet

wide crushed

and

sheared

zone

in al

luvi

um.

u>

County

(C

ity)

of

Ju

risd

ictio

n

San

A

nd

rea

s

County

(C

ity)

File

N

umbe

r

Fault.

San

(San

Be

rna

rd in

o)

(10*)

CD

MG

A

P

File

Nu

mb

er

7-1

/2

Min

ute

Q

uad

rang le

( s)

Be

rna

rd in

o

County

(F

iqs.

531

San

B

ern

ard

in

o

Da

te o

f R

ep

ort

( s)

(Mo

/da

/yr)

10-1

U)

1/7

/77

Investigating

F i r

m o

r G

eo I

og i

s t

C.

Price

Identification

Nu

mb

er

and

Site

Description

Wh

ere

no

C

ity o

r C

ounty

N

um

ber

Are

a

No.

U

11

717-3

(Sa

n

Be

rna

rdin

o)

(11

*)

52

9

(San

Be

rna

rdin

o)

(12

*)

22U

(San

Bern

ard

ino)

(13

*)

657

(San

Be

rna

rdin

o)

(1U

*)

1U89

(Sa

n

Bern

ard

ino)

(15

*)

6U5

(San

Be

rna

rdin

o)

(16*)

2

23

(Sa

n

Be

rna

rdin

o)

(17

*)

656

North

Two

trenches to de

pths

of

8

feet

directly no

rthe

ast

and

on San

Andreas

fault

(CDMG, 19

7Unn

).

"She

ar zo

ne"

and

"disturbed zo

ne of sa

ndst

one

and

reddish

brow

n siIty

sand

" in Potatoe

sandstone; not

clear

from

report whether

youn

ger

units

(Rec

ent

allu

vium

and

Pleistocene

silty

sand

) are

faulted.

San

Bern

ardi

no

North

1/17/77

G.A. Clopine

North

end

of E

F St

reet

sand

Thre

e tr

ench

es and

2 pi

ts within and

sout

hwes

t of San

Andreas

fault

zone

(CDMG,

197U

nn),

faults cut

old

allu

vium

an

d place

olde

r alluvium ag

ains

t Potatoe

sand

­ stone within 3.5

and

2.5

feet

of surface.

"Old al

luvi

um"

incl

udes

dark gray to bl

ack

clay,

"pro

babl

y represents sag

pond ma

teri

al".

San

Bernardino

North

12/U/75

G.A.

Cl

opin

eMa

yfie

ld Av

e. be

twee

n 58

th and

59th

Streets.

Two

tren

ches

to a maximum

dept

h of 12

.5 feet in un

faul

ted

and

unfr

actu

red

alluvium re

stin

g on fr

actu

red

Pota

toe

sand

ston

e directly no

rthe

ast

of San

Andr

eas

faul

t (CDMG, 19

7Unn

); no

faulting.

San

Bernardino

Nort

h6/

3/77

G.A. Clopine

Pa rce

I U6

Tren

ch up to 8

feet de

ep lo

cate

d be

twee

n strands

of San

Andreas

fault

zone

(C

DMG,

19

7Unn

), no

faulting in Po

tato

e sa

ndst

one

over

lain

by Ho

loce

ne allu­

vium

.

San

Bern

ardi

no

Nort

h9/11/79

Gary S.

Rasmussen

and

Asso

ciat

esPr

ojec

t

Tren

ch up to

8

feet

deep be

twee

n strands

of Sa

n An

drea

s fa

ult

(CDM

G, 19

7Unn

),

no fa

ulti

ng

in Ho

loce

ne al

luvi

um ov

erly

ing

Potatoe

sandstone.

San

Bernardino

North

6/2/

77Gary S. Ra

smus

sen

and

Asso

ciat

esPr

ojec

t #1201

Four

tr

ench

es up

to

11.5 feet de

ep ac

ross

two

strands

of San

Andreas

faul

t (C

DMG,

19

7Unn

), fa

ulti

ng of Ho

loce

ne alluvium within

1.5

feet of

surface.

San

Bernardino

Nort

h7/

7/75

F.A.

Fl

emin

g5U

th St

reet

ne

ar

Sepu

lved

a Avenue.

Thre

e tr

ench

es to de

pths

of 10

to 1U

feet

in alluvium,

directly no

rthe

ast

of

San

Andr

eas

faul

t (CDMG, 197Unn), no evidence of

faulting.

San

Bernardino

North

1/19/77

C. Price

Lot

9, Bl

ock

15U,

page 6, S.B. Co.

Tren

ches

up

to

9

feet de

ep so

uthw

est

of Sa

n Andreas

fault

(CDMG, 197Unn), no

faulting

in alluvium.

Cou

nty

(Cit

y)

of

Ju

risd

ictio

n

Co

un

ty(C

ity

)F

i le

Num

ber

COM

GA

PF

i le

Num

ber

7-1

/2

Min

ute

Q

ua

dra

ng

le(

s)

Date

of

Re

po

rt(

s)

(Mo

/da

/yr)

Investigating

Fi

rm or

Geolo

g i

st

Ide

ntifica

tio

n

Nu

mb

er

and

Site

D

escription

Wh

ere

n

oC

ity o

r C

ou

nty

N

um

ber

San

A

nd

rea

s

Fault.

San

B

ern

ard

!no

Co

un

ty

(Fig

s.

10-1

U1

(Sa

n B

ern

ard

ino

) (1

8*)

8

63

(San

Bern

ard

ino)

(19

*)

637

San

B

ern

ard

ino

Nort

h5/U/78

Gary S.

Rasmussen

and

Asso

ciat

esPr

ojec

t #1

332

Tren

ch up to 10

fe

et deep southwest

of San

Andr

eas

fault

(CDM

G, 197Unn), no

faul

ting

in

Ho

loce

ne alluvium.

San

Bernardino

Nort

h8/19/77

Gary S. Rasmussen

and

Asso

ciat

esPr

ojec

t #1235

(San Bernardino)

(20*)

866

(San Bernardino)

(21»)

109U

(San

Bernardino)

(22»)

1089

(San

Bernardino)

(23*)

108«

4

(San

Bernardino)

(2U*)

1090

(San Bernardino)

(25*)

268

Tren

ch up

to

11

feet deep located

150

feet so

uthw

est

of San

Andreas

fault

(CDMG,

197U

nn),

no

faulting

in Holocene alluvium.

San

Bern

ardi

no

3/9/

78

North

Gary S.

Rasmussen

and

Associates

Proj

ect

#130«4

Tren

ch up

to

11

feet de

ep southwest

of Sa

n Andreas

fault

(CDMG, 19

7Unn

), no

faulting in

Ho

loce

ne al

luvi

um.

San

Bernardino

8/9/78

North

Gary S.

Rasmussen

and

Associates

Proj

ect

#1358

Tren

ches

up to 11 fe

et de

ep so

uthw

est

of San

Andr

eas

fault

(CDM

G, 197Unn), no

faulting in Ho

loce

ne alluvium.

San

Bern

ardi

no

9/12

/77

Gary S. Rasmussen

North

and

Associates

Proj

ect

#123

3

Trenches ac

ross

strands

of Sa

n Andreas

faul

t (C

DMG,

197Unn), faulting

in Holo­

cene

a Il

uviu

m.

San

Bernardino

8/1/78

North

Gary S. Rasmussen

and

Associates

Project

#137

7

Trenches up to

11

fe

et de

ep ac

ross

st

rand

of

Sa

n An

drea

s fa

ult

(CDM

G, 197Unn),

"pro

babl

y late Pl

eist

ocen

e" terrace

depo

sits

faul

ted

agai

nst

Pota

toe

sand

ston

e.

San

Bernardino

North

8/2/

79Gary S.

Rasmussen

and

Asso

ciat

esPr

ojec

t #1506

Tren

ches

an

d cu

ts across st

rand

s of San

Andr

eas

faul

t (C

DMG,

197Unn), fa

ulti

ng

in metamorphic

rock

s and

"pro

babl

y late Pl

eist

ocen

e" te

rrac

e deposits.

San

Bernardino

5/20/76

G.A.

CI opi

ne

Nort

hBo

nita

Vi

sta

Driv

e at Qu

ail

Canyon Ro

ad

Two

trenches to maximum

depth

of 13.5 fe

et in

"red arkosic

older

allu

vium

" be­

twee

n two

strands

of San

Andr

eas

fault

(CDM

G, 19

7Unn

), no faulting.

oo

County

(City)

of

Juri

sd iction

San

Andr

eas

County

(Cit

y)

Fi le

Number

Fault. Sa

n

(San Be

rnar

d! no)

(26*)

CDMG

AP

File

Number

7-1/2

Minu

te

Quad

ran

g le

( s)

Bern

ard!

no

County (F

iqs.

638

San

Bern

ard!

no

North

Date

of

Report( s)

(Mo/da/yr)

10-1U) 5/20

/76

11/1

0/77

Investigating

F i r

m or

Ge

olog

i st

G.A.

Clopine

Iden

tifi

cati

on Number and

Site De

scri

ptio

n Wh

ere

no

City

or

County Number

Boni

ta Vista

Driv

e at Qu

ail

Canyon Road

(Sa

n

Bern

ard

ino)

(27*)

6

55

San

B

ern

ard

ino

(28

) 7

12

San

B

ern

ard

ino

(29

) 929

(Sa

n B

ern

ard

ino)

(30*)

1505

(Sa

n

Bern

ard

ino)

(31

*)

6U8

(Sa

n

Bern

ard

ino)

(32*)

527

(San

Bern

ard

ino)

(33

*)

1U88

(Sa

n

Bern

ard

ino)

(3U

*)

21

8

Pit

and

trench

be

twe

en

str

ands o

f S

an

Andre

as fa

ult

(CD

MG

, 197U

nn)

up

to

11.7

5

feet

de

ep

, no

fa

ultin

g

in old

er

alluviu

m.

'

San

B

ern

ard

ino

Nort

h6/

2U/7

7Gary S.

Rasmussen

and

Associates

Proj

ect

#1212

Tren

ch up

to

11 feet de

ep ac

ross

st

rand

of

San

Andr

eas

fault

(CDMG, 19

7Unn

),

no fa

ulti

ng

in Ho

loce

ne alluvium.

San

Bern

ardi

no

North

U/17

/78

U/19/78

Gary S.

Rasmusser.

and

Associates

Project

#133

6

Tren

ches

up

to

11 fe

et de

ep so

uthw

est

of San

Andreas

fault

(CDMG, 19

7Unn

),

no fa

ulti

ng in Ho

loce

ne alluvium.

San

Bern

ardi

no

North

9/18/78

Gary S.

Rasmussen

and

Associates

Project

#1U05

Tren

ches

so

uthw

est

of San

Andreas

faul

t (C

DMG,

19

7Unn

), no fa

ulti

ng in Holo­

cene

a Iluvium.

Harr

ison

Mt

n.12/30/81

G.A.

Cl

opin

eCh

iqui

ta La

ne

Trench,

9.5-10 fe

et deep,

north

of No

rth

Bran

ch San

Andr

eas

fault

(CDM

G, 19

7Uoo

),

no faulting

in late Pleistocene

and

Holo

cene

alluvium.

Harr

ison

Mt

n.12/9/77

G.A.

Cl

opin

eT

ract

No.

10220

Tre

nch

es

acro

ss

No

rth

B

ran

ch

San

A

ndre

as fa

ult

(CD

MG

, 1

97

Uo

o),

P

ota

toe

sandsto

ne

fau

lte

d again

st

Ple

isto

ce

ne

old

er

alluviu

m;

6 fe

et

wid

e

zone w

hic

h

exte

nds

to w

ithin

1

foo

t o

f su

rfa

ce

.

Harr

ison

Mt

n.10

/22/

76

G.A.

Cl

opin

e170U Bo

nita

Vi

sta

Drive.

Tren

ches

, maximum

dept

h 1M

fe

et,

between

stra

nds

of San

Andreas

fault

(CDM

G, 197Uoo),

no faulting

in "l

ate

Pleistocene

older

alluvium".

Harr

ison

Mt

n.09/7/79

3/18

/80

G.A.

Cl

opin

eEcho Dr

ive

Tren

ches

, 10

-15

feet

deep,

betw

een

bran

ches

of

Sa

n An

drea

s fa

ult

(CDM

G, 197Uoo),

no faulting in Quaternary alluvium.

Harr

ison

Mt

n.

11/30/7U

G.A.

Clopine

Osbun

Road

Tren

ches

, 9

to 13

feet deep,

betw

een

strands

of San

Andr

eas

fault

(CDM

G, 197Uoo),

no faulting in "o

lder

alluvium of

la

te Pleistocene

age"

an

d "sag pond (lake) deposits

,

County

(City)

of

Jurisdiction

County

(City)

File

Number

CDMG AP File

Number

7-1/

2 Mi

nute

Qu

ad ran

g Ie

(s)

Date

of

Repo

rt( s)

(Mo/

da/y

r)

Investigating

Fi rm or

Ge

olog

i st

Iden

tifi

cati

on Number and

Site De

scri

ptio

n Wh

ere

noCity or

County Number

vo

San

A

nd

rea

s F

au

lt.

San

B

ern

ard

i no

C

ou

nty

(F

igs.

10

-1U

)

(Sa

n

Bern

ard

!no)

(35*)

10

83

(Sa

n

Bern

ard

?no)

(36

*)

530

(Sa

n

Bern

ard

!no)

(37*)

56

1

(San Bernardino)

(38*)

1U93

(San Bernardino)

(39*)

1085

(San Bernardino)

(UO*)

635

(San

Bernard

I no)

(U

1*)

217

(San Be

rnar

d in

o)

(U2*)

869

Harr

ison

Mt

n.8/10/78

Geo-

Sec,

Home,

Chan

ce and

Asso

ciat

es

Project

#332

Trenches,

maximum

dept

h 15

fe

et,

acro

ss South

Bran

ch San

Andr

eas

fault

(CDMG,

197Uoo), faulting in al

luvi

um.

Harr

ison

Mt

n.3/

2/77

G.A.

Cl

opin

e1800 bl

ock

E.

Mesa

Drive.

Trench,

1U to

16

fe

et deep,

betw

een

strands

of San

Andreas

fault

(CDMG, 19

7Uoo

),

no fa

ulti

ng

in late Pleistocene

olde

r alluvium.

Harr

ison

Mt

n.12

/12/

77

G.A.

Cl

opin

eVi

e. of 1900

Mesa

Ve

rde

Drive

Tren

ch,

average

depth

13 feet,

betw

een

strands

of San

Andreas

faul

t (C

DMG,

1974oo),

faulting

in "o

lder

al

luvi

um"

over

lain

by

un

faul

ted

"you

nger

alluvium

.

Harri son

Mtn.

3/28/77

G.A.

Clopine

Lot

35,

Trac

t 56

59

Trench,

11 feet de

ep,

north

of So

uth

Bran

ch San

Andr

eas

fault

(CDMG, 197Uoo),

no faulting in

ol

der

alluvium.

Harr

i son

Mtn.

8/7/

78Gary S. Rasmussen

and

Asso

ciat

esProject

#138

7

Trenches,

aver

age

dept

h 10

fe

et,

acro

ss No

rth

Bran

ch San

Andr

eas

fault

(CDM

G,

197U

oo),

la

te Pleistocene

terrace

depo

sits

faulte

d ag

ains

t Ho

loce

ne alluvium.

Harr

ison

Mtn.

6/10

/77

G.A.

Clopine

Heml

ock

and

WiI lo

w Drive

Two

tren

ches

, av

erag

e depth

8 feet,

acro

ss So

uth

Bran

ch San

Andreas

faul

t (C

DMG,

197Uoo),

late

Pleistocene

olde

r al

luvi

um faulted

against

Holocene alluvium.

Harr

ison

Mt

n.9/

21/7

4 G.

A. Clopine

Tract

85U5

Trenches,

9 to

16

feet deep,

sout

hwes

t of San

Andreas

fault

(CDMG, 197Uoo), no

faulting in

Ho

loce

ne alluvium.

Harr

ison

Mt

n.5/20/78

Geo-

Sec,

Home,

Chance and

Assoc iates

Project

#331

Tren

ches

, av

erag

e de

pth

10 feet,

directly so

uthw

est

of So

uth

Branch Sa

n Andreas

faul

t (CDMG, 197Uoo), no

fa

ulti

ng

in Ho

loce

ne al

luvi

um.

Coun

ty

(City)

of

Juri

sdic

tion

San

Andreas

Coun

ty

(Cit

y)

Fi le

Number

Faul

t. Sa

n

(San Be

rnar

d! no)

(43*)

CDMG

AP

File

Number

7-1/2

Minu

te

Quad

ran

g le( s)

Bern

ard!

no

County (Fiqs.

650

Harrison Mtn.

Date of

Re

port

(s)

(Mo/da/yr)

10-1

4)

04/8

/77

6/20

/77

Investigating

F i r

m or

Geol

og i st

Gary S. Ra

smus

sen

and

Associates

Identification Number a

nd

Site

De

scri

ptio

n Wh

ere

no

City or C

ounty

Number

Project

#118

5

(San Be

rnar

d!no

) (4

4*)

868

(San Be

rnar

d!no

) (1

5*)

653

(San

Be

rnar

d)no

) (4

6*)

646

(San Bernard!no)

(47*

) 221

(San Be

rnar

d!no

) (4

8*)

528

(San Be

rnar

d I no)

(49*

) 524

(San Bernard!no)

(50*

) 14

95

Tren

ches

, av

erag

e de

pth

11 fe

et,

southwest

of San

Andr

eas

fault

(CDM

G, 19

74oo

),

no faulting in

Holocene al

luvi

um.

Harrison M

tn.

10/1

2/78

Gary S. Rasmussen

and

Asso

ciat

esPr

ojec

t #1

403

Tren

ches

, average

depth

11 fe

et,

acro

ss South

Bran

ch San

Andr

eas

fault

(CDM

G,

1974oo), fa

ulti

ng

in Holocene alluvium.

Harr

ison

Mt

n.8/

2/77

Gary S. Ra

smus

sen

and

Asso

ciat

esProject

#110

9-3

Tren

ches

, average

dept

h 12

fe

et,

acro

ss South

Bran

ch San

Andr

eas

faul

t (C

DMG,

19

74oo

), tw

o ma

jor

traces,

approximately

120

feet

ap

art,

rupture

olde

r al

lu­

vium

to

wit

hin

6 in

ches

of

su

rfac

e.

"Car

bon

14 sample

indicated

in "wet or

gani

c clay"

9 fe

et be

low

surface

adja

cent

to

fault

zone

. No da

ta on

sa

mple

in

re

port

.

Harrison M

tn.

10/77

C. Price

Area No

. 40

9 713-1

Tren

ches

, 10

to 15

feet de

ep,

south

of San

Andreas

fault

(CDM

G, 1974oo), no

faulting in

Pleistocene

allu

vium

.

Harrison M

tn.

1/21/75

Gary S. Ra

smus

sen

and

Asso

ciat

esProject

#108

3

Trenches,

aver

age

dept

h 10

fe

et,

sout

hwes

t of

San

Andr

eas

fault

(CDM

G, 19

74oo

),

no fa

ulti

ng in

Ho

loce

ne al

luvi

um.

Harr

ison

Mt

n.2/

18/7

7Gary S.

Ra

smus

sen

and

Associates

Project

#117

6

Trenches,

10 to

15

fe

et de

ep,

acro

ss strand of

San

Andr

eas

faul

t (C

DMG,

1974oo),

faul

ting

in sandstone

and

cong

lome

rate

of Potato

e Fo

rmat

ion.

Harr

ison

Mt

n.3/

19/7

4 9/10/76

Gary

S. Rasmussen

and

Asso

ciat

esPr

ojec

t #1016-3

Trenches no

rthe

ast

of San

Andreas

fault

(CDM

G, 1974oo), no

ac

tive

tr

aces

in

al

luvi

um,

terrace

depo

sits

, an

d co

nglo

mera

te of

Potatoe

Form

atio

n.

Harrison M

tn.

7/17

/80

Geol

ogic

al Sy

stem

s Evaluation Co

.Pr

ojec

t #334

Tren

ches

, 4

feet

de

ep,

acro

ss South

Bran

ch San

Andreas

fault

(CDM

G, 1974oo),

faulting in

a Iluvium.

Coun

ty

(Cit

y)of

Ju

risd

icti

on

Coun

ty(City)

Fi le

Numb

e r

CDMG AP File

Number

7-1/

2 Mi

nute

Quadrangle( s)

Date

of

Report(s)

(Mo/

da/y

r)

Inve

stig

atin

g F

i rm

or

Geol

og i st

Identification Number a

ndSite Description

Wher

e no

City o

r County Number

San

A

ndre

as

Fa

ult.

San

B

ern

ard

ino

County

(F

igs.

10-1

U)

(Sa

n B

ern

ard

ino)

(51*)

222

(Sa

n B

ern

ard

ino)

(52*)

65

1

San

B

ern

ard

ino

(5

3)

891

San

B

ern

ard

ino

(5U

) 90

San

B

ern

ard

ino

(5

5)

70

9

San

B

ern

ard

ino

(5

6)

668

San

B

ern

ard

ino

(5

7)

601

(Sa

n B

ern

ard

ino)

(58*)

862

Harrison M

tn.

06/24/75

Leig

hton

and

10/2

0/77

As

soci

ates

Project

#GU2

56-2

Trenches be

twee

n st

rand

s of

San

Andr

eas

fault

(CDM

G, 197Uoo), no

evidence of

recent fa

ulti

ng in

conglomerate

of Potatoe

Form

atio

n, "l

ess

prom

inen

t fault

in Potatoe

Form

atio

n."

Harr

ison

Mtn

.7/22/77

Leig

hto

n

and

Asso

cia

tes

Project

#77219-1

Tren

ch directly southwest

of South

Bran

ch San

Andreas

fault

(CDMG, 197Uoo), no

fa

ulti

ng in

Pleistocene

allu

vium

.

Harrison M

tn.

8/30/78

Gary S.

Rasmussen

and

Associates

Project

#138

8

Tren

ches

, minimum

dept

h 10 fe

et,

betw

een

stra

nds

of San

Andreas

faul

t (C

DMG,

19

7Uoo

), no

faulting in

ol

der

allu

vium

.

Harrison M

tn.

2/3/

75G.A. CI opi

neLot

47,

Trac

t 5299

Two

tren

ches

, maximum

dept

h 12

feet,

between

strands

of San

Andreas

fault

(CDM

G, 197Uoo), no

faulting in

"late

Pleistocene

olde

r al

luvi

um".

Harrison M

tn.

ti/14/78

Gary

S. Rasmussen

and

Associates

Project

#131

8

Trenches,

minimum

dept

h 11 feet,

acro

ss South

Bran

ch San

Andreas

faul

t (C

DMG,

197Uoo), fa

ulti

ng in

Holocene alluvium.

Harrison M

tn.

12/19/77

Gary

S. Ra

smus

sen

and

Asso

ciat

esProject

#1082-2

Trenches,

mini

mum

dept

h 11 feet,

acro

ss So

uth

Bran

ch San

Andreas

faul

t (C

DMG,

19

7Uoo

); fa

ulti

ng in

Ho

loce

ne alluvium a

nd sa

g pond de

posi

ts.

Harrison M

tn.

12/21/77

Gary

S. Ra

smus

sen

and

Associates

Project

#128

0

Trenches,

mini

mum

dept

h 11

feet,

acro

ss South

Bran

ch San

Andreas

faul

t (C

DMG,

197Uoo), an

d "a

ddit

iona

l bu

ried

and

inac

tive

fa

ults

"; fault

displacement

in Holocene alluvium and

mid-

late

Pl

eist

ocen

e te

rrac

e deposits.

Harr

ison

Mtn

2/8/

78Gary S. Rasmussen

and

Associates

Project

#1301-2

Tren

ches

, minimum

dept

h 11 fe

et,

acro

ss No

rth

and

Sout

h Br

anch

es San

Andreas

fault

(CDM

G, 19

7Uoo

), fa

ulti

ng in

late Pl

eist

ocen

e terrace

deposits resting

on

Pota

toe

sand

ston

e an

d metamorphic

rocks.

County

(C

ity)

of

Ju

risd

icti

on

Co

un

ty(C

ity)

Fi

leN

umbe

r

CDM

GA

PF

i le

Nu

mb

er

7-1

/2

Min

ute

Q

uad

ran

gle

(s)

Date

of

Repo

rt(s

)(Mo/da/yr)

Investigating

F i r

m or

Ge

olog

i st

Identification Number and

Site

Description Where no

City or

County Number

NJ

San

A

nd

reas

F

au

lt.

San

B

ern

ard

ino

C

ou

nty

(F

igs.

1Q-1

U)

San

B

ern

ard

ino

(5

9)

625

San

B

ern

ard

ino

(6

0)

63U

San

B

ern

ard

ino

(6

1)

890

San

B

ern

ard

ino

(6

2)

660

San

B

ern

ard

ino

(6

3)

930

San

B

ern

ard

ino

(6

U)

53

San

B

ern

ard

ino

(6

5)

1448

San

B

ern

ard

ino

(6

6)

987

Harr

iso

n M

tn.,

Red

lan

ds

1/10

/78

Gary S.

Rasmussen

and

Associates

Proj

ect

#1281

Tren

ches

, minimum

depth

11 fe

et,

acro

ss So

uth

Branch San

Andreas fault

(CDM

G,

1974oo), an

d "b

urie

d inactive fault";

faulting

in Holocene alluvium and

sag

pond de

posi

ts.

Harr

ison

Mtn.,

Red lands

1/24/78

Gary S. Ra

smus

sen

and

Associates

Project

#1295

Tren

ch,

11 feet minimum de

pth,

so

uthw

est

of So

uth

Bran

ch San

Andreas fa

ult

(CDMG, 1974oo), no faulting in

Holocene al

luvi

um.

Yuca

i pa

12/1

1/78

Gary S. Rasmussen

and

Associates

Project

#1063-3

Tren

ches

, 10 to 15 fe

et de

ep,

acro

ss So

uth

Bran

ch San

Andreas fault

and

asso

c­

iate

d th

rust

fa

ults

(CDMG, 1979ss), 110

feet wide fault

zone

across San

Andreas

faul

t an

d other

faul

ts

in Ho

loce

ne al

luvi

um.

Yuca i pa

2/3/78

2/14/78

Gary S. Rasmussen

and

Associates

Project

#1239-2

Tren

ches

, av

erag

e depth 10 feet,

sout

hwes

t of

Sout

h Br

anch

San

Andreas fa

ult

(CDMG, 19

79ss

), fa

ulti

ng in

Ho

loce

ne al

luvi

um.

Yuca

i pa

10/2

0/78

Gary S. Rasmussen

and

Associates

Project

#1400

Tren

ches

, average

depth 10 feet,

sout

hwes

t of

South

Branch San

Andreas fa

ult

(CDMG, 1979ss), no faulting

in Holocene allluviu

m.

Yuca

ipa

10/2

7/74

9/17/77

1/18

/78

Lewis

S. Lo

hrJob

#2-74-10

Job

#36-77-9

Tren

ches

, av

erag

e de

pth

6 feet,

directly between

stra

nds

of South Branch

San

Andreas

fault

(CDMG, 19

79ss

), no

fa

ulti

ng in Holocene al

luvi

um.

SW1/4

San

Gorgonio Mtn.

4/19

/82

Leig

hton

an

d Associates

Proj

ect

#6810707-01

Tren

ches

, 11 to 13 fe

et de

ep,

nort

heas

t of

st

rand of South

Branch San

Andreas

fault

(CDMG, 197Upp), no fa

ulti

ng

in Ho

loce

ne al

luvium.

SW1/4

San

Gorgonio Mtn.

6/26/78

Gary

S. Ra

smus

sen

and

Associates

Project

#1365

Trench,

10 to 12 feet deep,

northeast

of st

rand

of

So

uth

Branch San

Andreas

faul

t (CDMG, 19

74pp

), no

faulting in

Holocene al

luvium.

County

(City)

of

Jurisdiction

County

(Cit

y)

Fi le

Numb

er

San

Andr

eas

Faul

t. Sa

n

San

Bernardino

(67)

CDMG

AP

Fi

le

Number

7-1/2

Minu

te

Quad

ran

g I e( s)

Bernardino County (F

iqs.

624

SW1/U

San

Gorg

onio

Mt

n.

Date

of

Re

port

( s)

(M

o/da

/yr)

10-14)

1/30/76

Investigating

F i r

m or

Ge

olog

ist

Lewi

s S. Lo

hr

Iden

tifi

cati

on Number an

d Site De

scri

ptio

n Where

no

City or

County Number

Oak

Glen

Pi

nes

Camp

Tre

nch

, a

vera

ge

depth

10

fe

et,

south

west

of

So

uth

B

ran

ch

San

A

nd

rea

s fa

ult

(CD

MG

, 1

97

Up

p),

no

fa

ultin

g

in

Ho

loce

ne

a

lluviu

m.

San

B

ern

ard

ino

(68)

37U

S

E1/

U

Mor

ongo

6/1

7/7

5

Convers

e-D

avis

- P

roje

ct

#75-1

02-2

8V

alle

y

12/1

0/7

6

Dix

on

A

ssocia

tes

Two

trenches

up

to

12

fee

t nort

hw

est

of

Mor

ongo

V

alle

y fa

ult

(CD

MG

, 1

97

Uq

),

no fa

ultin

g

in

Ho

loce

ne

a

lluviu

m.

Fig. 14

- L

ocat

ions

of en

gine

erin

g geology

reports

along

Miss

ion

Creek

and

Moro

ngo

Valley f

aults

between

San

Gorg

onio

Mou

ntai

n and

Seven

Palms

Vall

ey a

reas b

y Sa

n Bernardino a

nd R

iver

side

Cou

nty

numbers.

See

Fig.

1

for

loca

tion

an

d Fi

g. 2

for ex

plan

atio

n of s

ymbols.

Ui

s /\ \

X*

* *"'

\>

\V>

'~-

X\ \

y

'' <

/S^~

y^^

1 M

ILE

1 K

ILO

ME

TE

R

SC

ALE

Fig

. 15

-

Loca

tions

o

f en

gine

erin

g ge

olog

y re

port

s al

ong

Mis

sion

C

reek

fa

ult b

y C

ity o

f D

eser

t H

ot S

prin

gs

num

ber.

See

Fig

. 14

fo

r lo

catio

n

and

Fig

. 2

for

exp

lanatio

n o

f sy

mbo

ls.

County

County

CDMG

(City)

(Cit

y)

AP

of

File

File

Juri

sdic

tion

Nu

mber

Number

Miss

ion

Creek

and

Associated

Riversid

e 12

R

626

Rive

rsid

e 51

271

Rive

rsid

e 96

599

Rive

rsid

e 152-R

980

Riverside

155

916

Rive

rsid

e 156

922

Riverside

157

921

Rive

rsid

e 17

2 979

7-1/

2 Da

te of

Investigating

Identification Number and

Minu

te

Repo

rt(s

) Firm or

Si

te De

scri

ptio

n Where

no

Quad

ran

g I e( s)

(Mo/da/yr)

Geologist

City

or

County Number

Faul

ts.

Riverside

County (F

iqs.

14

and

15):

Seven

Palm

s 11/21/77

Gary S.

Rasmussen

Proj

ect

#125

5 Valley

and

Associates

Six

tren

ches

, 10-11

feet deep,

acro

ss and

sout

hwes

t of Mission

Creek

fault

(CDMG, 19

80n)

. Tr

ench

es 1,

3,4:

faulting in Ho

loce

ne alluvium (Q

al of Rogers,

1965).

Seve

n Pa

lms

6/29/76

Lewi

s S. Lohr

Job

#12-76-6

Val ley

One

trench,

10-1

2 feet de

ep,

nort

heas

t of

Mission

Cree

k fa

ult

(CDMG, 1974n).

No

faulting in Ho

loce

ne alluvium (Q

al of

Ro

gers

, 1965).

Seven

Palm

s 10/16/77

Lewis

S. Lo

hr

Job

#1*0

-77-

10

Val ley

One

tren

ch,

10-1

2 fe

et deep,

northeast

of Mission

Creek

faul

t (C

DMG,

19

74n)

. No

faulting in Ho

loce

ne alluvium (Q

al of

Ro

gers

, 19

65).

Seven

Palm

s 4/17/79

Gary

S.

Rasmussen

Proj

ect

#147

3 Valley

and

Associates

Five tr

ench

es,

10-1

2 feet deep,

acro

ss and

nort

heas

t of Mission

Creek

fault

(CDMG, 1980n)

Tren

ches

1,

2,5:

faulting in

Ho

loce

ne alluvium (Q

al of Rogers,

1965).

Seve

n Pa

lms

1/12/79

Gary

S.

Rasmussen

Proj

ect

#143

2 Valley

and

Associates

Two

tren

ches

, 10

-12

feet deep,

northeast

of Mi

ssio

n Creek

faul

t (CDMG, 19

74n)

. No

faulting in Ho

loce

ne al

luvi

um (Qal of

Ro

gers

, 19

65).

Seve

n Pa

lms

1/18

/79

Gary

S.

Rasmussen

Proj

ect

#1430

Valley

and

Associates

Three

tren

ches

, 10

-12

feet de

ep,

acro

ss Mission

Cree

k fault

(CDMG, 19

80n)

. Trenches 1,3:

faul

ting

in Ho

loce

ne al

luvi

um (Q

al of Rogers,

1965

).

Tren

ch 2:

faulting in late

Pleistocene

unit

s and

Holo

cene

alluvium (Q

c and

Qal

of Rogers,

1965).

Seven

Palm

s 1/

15/7

9 Ga

ry S.

Rasmussen

Proj

ect

#1412-2

Valley

and

Associates

One

tren

ch,

10-12

feet

deep,

acro

ss Mission

Cree

k fault

(CDM

G, 1980n).

Faulting,

with

1

inch

ve

rtic

al of

fset

, in

Ho

loce

ne alluvium (Q

al of

Ro

gers

, 19

65).

Seven

Palm

s 4/24/79

Gary S. Rasmussen

Proj

ect

#1466

Valley

and

Asso

ciat

es

One

tren

ch,

10-1

2 feet deep,

nort

heas

t of Mi

ssio

n Cr

eek

fault

(CDMG, 19

74n)

. No

faul

ting

in

Ho

loce

ne alluvium (Q

al of Ro

gers

, 19

65).

County

County

CDMG

(C

ity)

(City)

AP

of

File

Fi

le

Juri

sdic

tion

Nu

mber

Nu

mber

Miss

ion

Cree

k and

Asso

ciat

ed

Rive

rsid

e 208

1161

Riverside

213

1265

Riverside

2«47

1U08

Rive

rsid

e 265

1U67

Dese

rt Ho

t ( 1

)

95

Springs

Dese

rt Hot

(2)

711

Spri

ngs

Dese

rt Hot

(3)

999

Springs

7-1/2

Date

of

Investigating

Identification Number and

Minu

te

Repo

rt(s

) Firm or

Si

te De

scri

ptio

n Where

no

Quadrangle( s)

(Mo/

da/y

r)

Geologist

City or

County Number

Faults,

Rive

rsid

e County (F

iqs.

1U

and

15):

Dese

rt Ho

t 2/

2/80

Le

wis

S. Lo

hr

Job

#81-

80-M

Springs

Three

tren

ches

, 10

feet deep,

acro

ss Mission

Cree

k and

White

Hous

e Canyon

faul

ts (C

DMG,

1980o).

Tren

ch 1:

Fault wi

th maximum

displacement of 2.

0 feet for White

Hous

e Ca

nyon

fa

ult

and

2.8

feet for

Mission

Creek

fault

in

Pleistocene

fanglomerate and

Holo

cene

alluvium.

Tren

ch 2:

Mission

Creek

faul

t displaces

Plei

stoc

ene

fanglomerate an

d Ho

loce

ne alluvium.

Tren

ch 3:

Miss

ion

Creek

faul

t di

spla

ces

Plei

stoc

ene

fanglomerate (Qc

and

Qa 1

of Ro

gers

, 19

65).

Dese

rt Hot

1/11

/80

Buen

a En

gine

ers,

Inc.

Job

#B-10857-P1

Springs

Two

tren

ches

, 10

feet deep,

nort

heas

t of

Sa

n Andreas

(Banning)

fault

(CDMG,

1980

o).

No faulting

in Ho

loce

ne al

luvi

um (Q

al of

Rogers,

1965

).

Morongo

Valley

5/22

/81

Leig

hton

and

Proj

ect

#679

0U«4

«4-0

5 SE

1/

U and

SW

Associates,

Inc.

vu Twen

ty-t

wo trenches,

5-15

feet deep,

across Mi

ssio

n Creek

fault

(CDM

G, 197Uq,r).

Tren

ches

1 ,

3, U,

5, 6, 7,25,26,27,28, 30, 31 , 32, 33, 35

, 36, 37

: faulting

in Holocene

alluvium (Q

al of Rogers,

1965

).

Seven

Palm

s 12

/1U/

81

Sout

hern

California

Job

#19*423

Valley

Soil

and

Test

ing,

Inc.

One

trench,

10 feet deep,

nort

hwes

t of

Fun

Valley fault

(CDM

G, 1980n).

Poss

ible

fa

ulti

ng in Ocotillo conglomerate,

but

no fa

ulti

ng in overlying

Holo

cene

al

luvi

al

and

aeol

ian

deposits (Q

c (?

) and

Qal

of Ro

gers

, 19

65).

Dese

rt Ho

t M/30/75

Gary S.

Ra

smus

sen

Project

#1099

Springs

and

Associates

Two

trenches,

8 fe

et de

ep,

nort

heas

t of Mission

Cree

k fault

(CDMG, 19

80o)

. No

faul

ting

in Ho

loce

ne fan

depo

sits

(Q

al of Ro

gers

, 19

65).

Dese

rt Hot

1/13/78

Buen

a Engineers,

Job

#B-9105-P1

Spri

ngs

Inc.

One

trench,

12 fe

et deep,

nort

heas

t of

Mission

Creek

fault

(CDM

G, 19

80o)

. No

faul

ting

in

Holocene alluvium (Qal of

Rogers,

1965

).

Dese

rt Hot

6/25

/79

Gary

S.

Rasmussen

Project

#1502

Springs

and

Associates

One

tren

ch,

maximum

dept

h 13 fe

et,

nort

heas

t of Mi

ssio

n Creek

fault

(CDM

G, 1980o)

No fa

ulti

ng

in Holocene al

luvi

um (Qal of Rogers,

1965

).

p*

oo

County

(City)

of

Juri

sdi

ct ion

County

(City)

File

Number

CDMG

AP

Fi le

Number

Miss

ion

Creek

and

Associated

Dese

rt Ho

t Sp

ring

s

Dese

rt Ho

t Sp

ring

s

Dese

rt Ho

t Sp

ring

s

Dese

rt Hot

Spri

ngs

Dese

rt Ho

t Sp

ring

s

Dese

rt Ho

t Sp

ring

s

Dese

rt Hot

Spri

ngs

Dese

rt Ho

t Sp

ring

s

(«*)

(5)

(6)

(7)

(8)

(9)

(10)

(11)

1098

1099 835

998

1M1

834

597

1001

7-1/2

Date

of

Investigating

Iden

tifi

cati

on Number and

Minu

te

Repo

rt(s

) Fi

rm or

Si

te De

scri

ptio

n Where

no

Quad

ran

g le( s)

(Mo/da/yr)

Geologist

City or

County Number

Faul

ts,

Rive

rsid

e County (F

iqs.

14

and

15):

Dese

rt Hot

1/28/80

Gary S.

Ra

smus

sen

Project

#15M

O Springs

and

Asso

ciat

es

One

trench,

11 to

15 feet de

ep,

nort

heas

t of Mi

ssio

n Creek

fault

(CDM

G, 19

80o)

. No fa

ulti

ng

in Ho

loce

ne alluvium (Qal of

Rogers,

1965

).

Dese

rt Hot

5/22

/70

Sout

hern

California

Job

#189

5**

Springs

Soil and

Testing,

Inc.

One

trench,

aver

age

dept

h 10

feet,

nort

heas

t of

Mission

Creek

fault

(CDM

G, 19

80o)

. Fracturing,

but

no fa

ulti

ng in

Holocene al

luvi

um and

aeolian

depo

sits

(Q

al of

Rogers,

1965

).

Dese

rt Hot

2/2/

78

Gary S. Rasmussen

Proj

ect

#128

9 Sp

ring

s an

d Associates

Two

tren

ches

, ma

ximu

m depth

12 feet,

nort

heas

t of Mission

Cree

k fault

(CDMG,

1980o).

No fa

ulti

ng

in Ho

loce

ne al

luvi

um (Qal of Rogers,

1965).

Desert Hot

7/2/

79

Gary

S.

Ra

smus

sen

Proj

ect

#1M93

Springs

and

Asso

ciat

es

Six

tren

ches

, average

dept

h 13 feet,

nort

heas

t of

Mission

Creek

fault

(CDM

G,

1980

o).

No fa

ulti

ng

in Holocene alluvium (Q

al of

Rogers,

1965

).

Dese

rt Hot

4/2U

/75

Gary S.

Rasmussen

Project

#110

0 Springs

and

Associates

One

tren

ch,

maximum

dept

h 10

fe

et,

nort

heas

t of Mission

Creek

fault

(CDG

M, 1980o).

No fa

ulti

ng in Holocene al

luvi

al fa

n deposits (Qal of

Rogers,

1965

).

Dese

rt Hot

8/31

/78

Gary S.

Rasmussen

Project

#139

3 Springs

and

Associates

One

trench,

11 fe

et de

ep,

sout

hwes

t of

Mi

ssio

n Cr

eek

fault

(CDM

G, 19

80O)

. No

faul

ting

in

Holocene al

luvi

um (Qal of Ro

gers

, 19

65).

Desert Hot

8/16/77

Gary

S.

Ra

smus

sen

Proj

ect

#123

0 Springs

and

Asso

ciat

es

Two

trenches,

aver

age

dept

h 10

feet,

acro

ss Mission

Creek

fault

(CDM

G, 1980o).

Tren

ch 2:

fa

ulti

ng

in Ho

loce

ne al

luvi

um (Q

al of Rogers,

1965).

Dese

rt Hot

8/6/

79

Gary S.

Ra

smus

sen

Project

#152

3 Springs

and

Associates

One

tren

ch,

10 to 12

feet de

ep,

nort

heas

t of Mission

Creek

fault

(CDM

G, 1980o).

Fracturing,

but

no fa

ulti

ng

in Ho

loce

ne alluvium (Qal of Rogers,

1965

).

County

(City)

of

Juri

sdic

tion

County

(City)

Fi le

Number

CDMG

AP

Fi le

Numb

er

Miss

ion

Creek

and

Asso

ciat

ed

Desert Hot

Spri

ngs

Dese

rt Hot

Sp r i ng s

Dese

rt Hot

Spri

ngs

Dese

rt Hot

Spri

ngs

Dese

rt Ho

t Sp

ring

s

Dese

rt Ho

t Sp

ring

s

Dese

rt Hot

Spri

ngs

Dese

rt Hot

Spri

ngs

(12)

(13)

(1*0

(15)

(16)

(17)

(18)

(19)

881

572

188

833

623

571

923

908

7-1/

2 Da

te of

Investigating

Iden

tifi

cati

on Number an

d Minute

Repo

rt(s

) Fi

rm or

Si

te De

scri

ptio

n Where

no

Quad

rang

I e( s)

(Mo/da/yr)

Geologist

City or

Co

unty

Number

Faul

ts,

Rive

rsid

e County (F

iqs.

1U

an

d 15

):

Dese

rt Hot

9/8/

78

Gary

S. Rasmussen

Proj

ect

#1391

Springs

and

Asso

ciat

es

Two

tren

ches

, maximum

dept

h 12

feet,

sout

hwes

t of

Mission

Creek

fault

(CDMG,

1980o).

No fa

ulti

ng in

Ho

loce

ne al

luvi

um (Qal of Rogers,

1965).

Dese

rt Hot

3/31/77

Gary S. Rasmussen

Project

#1186

Springs

and

Asso

ciat

es

One

tren

ch,

average

dept

h 10

feet,

sout

hwes

t of Mi

ssio

n Creek

fault

(CDMG, 19

80o)

, No

faulting in Ho

loce

ne alluvium (Q

al of Rogers,

1965

).

Seve

n Pa

lms

1/29

/76

Gary

S. Rasmussen

Proj

ect

#112

5 Va

lley

and

Asso

ciat

es

Four

tr

ench

es,

aver

age

depth

10 feet,

acro

ss Miracle

Hill

fa

ult

(CDMG, 19

80n)

. No faulting in

Ho

loce

ne fan

deposits (Qal of

Ro

gers

, 19

65).

Seven

Palm

s 8/2U/78

Gary

S. Rasmussen

Project

#138

3 Valley

and

Asso

ciat

es

Two

trenches,

maximum

dept

h 12

feet,

northeast

of Miracle

Hill

fa

ult

(CDMG,

1980

n).

No faulting in Ho

loce

ne al

luvi

um (Qal of

Rogers,

1965).

Seve

n Pa

lms

7/26/76

Gary S.

Rasmussen

Proj

ect

#115

2 Va

lley

and

Associates

Two

tren

ches

, 10

to

11

feet de

ep,

nort

heas

t of

Mission

Creek

faul

t (C

DMG,

19

80n)

. No

faulting

in Ho

loce

ne alluvium (Qal of Ro

gers

, 19

65).

Seven

Palm

s 12/10/75

Gary S.

Rasmussen

Proj

ect

#1120

Valley

and

Asso

ciat

es

Two

tren

ches

, av

erag

e de

pth

10 feet,

nort

heas

t of Mission

Hill fault

(CDMG,

1980n).

No faulting in Ho

loce

ne fan

depo

sits

(Qal of Rogers,

1965).

Seven

Palm

s 6/15/76

Gary S. Rasmussen

Proj

ect

#112

9 Valley

and

Asso

ciat

es

Two

tren

ches

, ma

ximu

m de

pth

11 feet,

nort

heas

t of Mi

ssio

n Hi

ll fault

(CDMG,

1980

n).

No faulting

in Ho

loce

ne fan

deposits (Qal of Rogers,

1965).

Seven

Palm

s 11

/2/7

7 Gary S. Rasmussen

Project

#126

3 Va

lley

and

Asso

ciat

es

One

trench,

maximum

dept

h 12

feet,

northeast

of Mi

racl

e Hi

ll fa

ult

(CDMG,

1980n).

Caliche-filled fr

actu

res

but

no faulting in Ho

loce

ne alluvium (Qal of

Roge

rs,

1965

).

Fig

. 16

-

Loca

tions

of

en

gin

ee

rin

g

geol

ogy

rep

ort

s al

ong

San

Jaci

nto

fa

ult

zone

bet

wee

n T

eleg

raph

Pe

akan

d Sa

n B

emar

dino

are

as

by S

an

Ber

nard

ino

Cou

nty,

C

ity (*

) an

d C

ity o

f R

ial t

o

(R)

num

bers

.Se

e F

ig.

1 fo

r lo

catio

n

and

Fig

. 2

for

exp

lanatio

n

of

sym

bols

.

Ul

Fig. 17 -

Locations o

f en

gine

erin

g ge

olog

y reports

along

San

Jacinto

fault

zone i

n Col to

n area b

y Sa

n Bernardino C

ounty

and

City o

f Co

lton

(C

) nu

mber

. See

Fig. 16 f

or l

ocation

and

Fig.

2

for ex

plan

atio

n of s

ymbols.

Coun

ty

(City)

of

Jurisdiction

County

(City)

Fi le

Number

CDMG AP Fi le

Number

7-1/2

Minute

Quadrangle(

s)

Date

of

Report(s)

(Mo/da/yr)

Investigating

F i r

m or

Geologi st

Iden

tifi

cati

on Number and

Site

De

scri

ptio

n Where

noCi

ty or

Co

unty

Nu

mber

San

Jaci

nto

Fault

Zone

. San

Bernardino Co

unty

(F

igs.

16 an

d 17)

(Ria

l to)

(D

San

B

ern

ard

ino

(U)

(Sa

n

Bern

ard

ino)

(71)

198

488

(San Bernardino)

(69)

1093

(San Bernardino)

(70)

1U9U 636

(San Bernardino)

(72)

1502

(San

Bernardino)

(73)

1092

San

Bern

ardi

no

08/2

U/72

Le

ight

on and

Nort

h 12/12/75

Asso

ciat

es

03/1

0/76

Proj

ect

#'s

2173,

7536

8-1,

75

368-

2

Two

trenches to

a

maximum

depth

of 10 feet in old

allu

vial

te

rrac

e deposits

estimated

to be "as

old

or older

than

11

,000

ye

ars

(Hol

ocen

e) and

may

be

as old

as Pleistocene

(11,000

- 3,

000,

000

± ye

ars)

lo

cate

d directly so

uthw

est

of San

Jacinto

faul

t (C

DMG,

197Unn), no

fa

ulti

ng.

Devo

re

6/20

/77

Gary

S. Rasmussen

and

Asso

ciat

esProject

#1213

Trench,

aver

age

depth

11 fe

et,

sout

hwes

t of

covered

trac

es San Ja

cint

o fault

(CDM

G, 19

7Umm

), no fa

ulti

ng

in Ho

loce

ne alluvium.

San

Bern

ardi

no

11/13/79

G.A.

Clopine

South

Baseline Av

e. an

d Ma

rtin

Road

Tren

ches

up to 8

feet

deep ac

ross

co

ncea

led

trac

es of

San

Jacinto

fault

(CDM

G,1977tt), zo

ne of de

form

ed Ho

loce

ne al

uviu

m in

fault

zone,

5 feet wi

de,

extends

to within 2

feet

of surface.

San

Bern

ardi

no

6/23

/80

G.A

Clopine

South

Nort

h of Ba

seli

ne Av

e.

Trenches,

9 to

10

feet deep,

acro

ss co

ncea

led

trac

es of San Jacinto

faul

t (CDMG,

1977

tt),

fa

ult

in Ho

loce

ne alluvium.

San

Bern

ardi

no

7/28

/77

Gary S. Rasmussen

South

and

Associates

Proj

ect

#1229

Tren

ch an

d te

st pi

ts so

uthw

est

of San

Jacinto

fault

(CDMG, 1977tt), no fa

ulti

ng

i n Ho Iocene

a I I

uv i ur

n.

San

Bernardino

10/2

7/81

G.

A. Cl

opin

e South

2010 West Foothill Blvd.

Trench,

aver

age

dept

h 10 feet,

sout

hwes

t of

San

Jacinto

faul

t (C

DMG,

1977tt),

no fa

ulti

ng in

Holocene alluvium.

San

Bernardino

10/29/79

Woodward-Clyde

Proj

ect

#U1158F/0009

Sout

h 12

/07/

79

Consultants

Trenches,

7-11

feet deep,

acro

ss "aerial

phot

o li

neam

ent"

and

northeast

of

Clar

emon

t fa

ult

(CDM

G, 19

77tt

), no

fa

ulti

ng

in Ho

loce

ne al

luvi

um.

Coun

ty

(City)

of

Jurisdiction

County

(City)

Fi le

Number

CDMG AP Fi le

Number

7-1/2

Minu

te

Quad

ra ngl

e(s)

Date

of

Report(s)

(Mo/

da/y

r)

Invest igat ing

Fi rm or

Geologist

Iden

tifi

cati

on Number an

dSi

te De

scri

ptio

n Where

noCi

ty or

County Number

VJl

u>

San

Jacin

to

Fa

ult

Zo

ne

. S

an B

ern

ard

ino

C

ounty

(F

igs.

16

an

d

17)

(Sa

n

Bern

ard

!no)

(7U

) 1U

91

(San

Bern

ard

!no)

(75)

1501

(San

Bern

ard

!no)

(76

) 15

0U

(Col t

on)

(D237

(Sa

n

Bern

ard

!no)

(77

) 1H

99

(Sa

n

Bern

ard

!no)

(78

)63

9

(San Bernard!no)

(79)

1U96

(San Bernard!no)

(80)

1U

92

San

Bern

ard!

no

1/22/80

Meda

I I,

Aragon,

South

U/30/80

Wors

wick

and

Associates

Proj

ect

#R1662A

Trenches 8-

10 feet de

ep,

directly no

rthe

ast

of pr

inci

pal

trace

of Sa

n Jacinto

faul

t (C

DMG,

19

77tt

), 5

to 25 fe

et w

ide

zone

of fr

actu

res

forming

fault

zone

in Ho

loce

ne al

luvi

um.

San

Bern

ardi

no

U/23

/79

G.A.

Cl

opin

e South

Scen

ic Drive

area

Three

tren

ches

up to

15 fe

et de

ep,

nort

heas

t of

Sa

n Jacinto

fault

(CDMG, 1977tt),

no faulting in

Ho

loce

ne alluvium.

San

Bernardino

10/29/81

Gary S.

Ra

smus

sen

Sout

h and

Asso

ciat

esProject

#1768

Thre

e tr

ench

es,

6 to 12 fe

et de

ep,

nort

heas

t of

San

Jacinto

fault

(CDMG, 19

77tt

),

fault wi

th 5

feet

wide

zone

of

bedding

defo

rmat

ion

and

2 feet of vertical di

s­

placement

in Ho

loce

ne alluvium.

San

Bern

ardi

no

5/7/

76

South

F.A.

Fl

emin

gCo I ton

Ave.

and

Harbor

Industrial Dr

ive

Tren

ches

up to 11

feet deep,

acro

ss strands

of Sa

n Ja

cint

o fault

zone (CDMG,

1977tt), faulting

in Ho

loce

ne alluvium.

San

Bern

ardi

no

10/1

0/80

Gary S.

Ra

smus

sen

South

and

Asso

ciat

esPr

ojec

t #1662

Trenches,

10-1

6 feet de

ep,

northeast

of Sa

n Jacinto

fault

(CDMG, 1977tt), no

faulting in

Ho

loce

ne alluvium.

San

Bern

ardi

no

12/5/77

Gary S. Ra

smus

sen

Sout

h an

d As

soci

ates

Project

#1278

Trench 9-11 feet deep,

nort

heas

t of

Sa

n Jacinto

fault

(CDM

G, 1977tt), no

faulting in

Ho

loce

ne alluvium.

"San

d boil"

probably ca

used

by

sh

akin

g during

eart

hqua

kes

of Richter

magnitude

6-1/

2 or

greater.

San

Bernard!no

6/2U/80

Geol

ogic

al Sy

stem

s So

uth

Eval

uati

on Co.

Project

#333

Trenches,

maxi

mum

dept

h 12 fe

et ac

ross

Sa

n Jacinto

fault

(CDM

G, 1977tt), no

faulting in Holocene alluvium.

San

Bern

ardi

no

U/29/80

G.A.

Cl

opin

e So

uth

South

"E"

St., and

Fa i rway Drive

Tren

ch,

average

depth

9 feet,

nort

heas

t of

Sa

n Jacinto

fault

(CDMG, 1977tt),

no faulting in Ho

loce

ne alluvium.

Co

un

ty

(City)

of

Ju

ri s

d le

t io

n

Cou

nty

(Cit

y)

Ft

leN

umbe

r

CDM

GA

PF

i le

Num

ber

7-1

/2

Min

ute

Q

uad

ran

g Ie

(s)

Da

te o

f R

eport

(s)

(Mo/d

a/y

r)

Inve

stig

atin

g

F i r

m o

r G

eo

log

i st

Identification

Num

ber

and

Site

D

escrip

tio

n

Whe

re

noC

ity o

r C

ou

nty

N

umbe

r

San

Ja

cin

to

Fa

ult

Zo

ne

. S

an

Bern

ard

!no

Co

un

ty (F

igs.

16

and

17

)

(Sa

n

Bern

ard

!no)

(81)

1018

(Sa

n

Bern

ard

!no)

(82)

1091

(Sa

n

Bern

ard

!no)

(83)

(Co

I to

n)

(2)

863

752

(Sa

n

Bern

ard

!no)

(84)

1503

(San

B

ern

ard

!no)

(85)

11U

O

(Sa

n

Bern

ard

!no)

(86)

867

(Sa

n

Bern

ard

!no)

(87)

525

San

B

ern

ard

!no

So

uth

5/75

W.A.

Wahler

and

Asso

ciat

esProject

#082

7

Trenches,

aver

age

depth

11 fe

et,

acro

ss "concealed"

trace

of San Jacinto

fault

(CDM

G, 19

77tt

). no fa

ulti

ng in Ho

loce

ne alluvium

.

San

Bern

ardi

no

7/19/79

Pion

eer

Cons

ulta

nts

South

Job

#324

9-00

1

Tren

ches

up to

11 fe

et de

ep,

acro

ss concealed

stra

nd of Sa

n Ja

cint

o fa

ult

(CDM

G,

1977

tt),

20

fo

ot w

ide

fault

zone

in Ho

loce

ne alluvium.

San

Bernardino

7/25

/78

Gary S.

Rasmussen

Sout

h an

d As

soci

ates

Project

#1371

Trench,

9-11 fe

et deep,

northeast

of Sa

n Jacinto

fault

(CDM

G, 1977tt), no fa

ulti

ng

in Ho

loce

ne alluvium.

San

Bernardino

6/6/78

Sout

hLeighton and

Asso

ciat

esProject

#678178-01

Tren

ches

to 11

fe

et deep,

sout

hwes

t of San

Jacinto

fault

(CDM

G, 1977tt), no

faulting in

Ho

loce

ne alluvium.

San

Bernardino

5/20/80

Gary

S.

Rasmussen

South

and

Asso

ciat

esPa

rcel

No

. 56

56,

NE of

Sout

hern

Pacific

& Hu

nts

Ln.

Trenches,

aver

age

depth

10 fe

et,

dire

ctly

northeast

of San

Jaci

nto

fault

(CDM

G,

1977

tt),

sa

nd di

kes

and

boil

s and

fault

in Holocene alluvium.

San

Bernardino

2/08

/80

Leighton and

Sout

h 2/

25/8

0 Associates

Project

#678302-05

6783

02-O

U

Several

tren

ches

, 11

to 12

fe

et deep,

acro

ss concealed

trac

es of San

Jacinto

faul

t and

"aer

ial

phot

o lineaments"

(CDM

G, 19

77tt

), fa

ulti

ng,

syncline,

and

sand

blows

in Holocene alluvium.

Squa

re he

aded

nails

in offset sediment

poss

ibly

indicate faulting si

nce

1800*s.

Fault

indicated

by di

ffer

ence

s in

grou

ndwa

ter

levels.

San

Bern

ardi

no

South

U/78

C. Pr

ice

Area No

. 403

717

Tren

ches

up to 9

feet

de

ep,

acro

ss "aerial

photo

lineament" (C

DMG,

1977tt), no

faulting in Ho

loce

ne alluvium.

San

Bernardino

U/25

/77

Gary S.

Rasmussen

South

and

Asso

ciat

esProject

#119

9

Tren

ches

up to

11

fe

et de

ep,

acro

ss "a

eria

l photo

lineament" (C

DMG,

1977tt),

no fa

ulti

ng in

Ho

loce

ne alluvium.

County

(City)

ofJurisdiction

County

(Cit

y)Fi

le

Number

COMG AP Fi le

Number

7-1/

2Mi

nute

Quadrangle( s)

Date of

Report( s)

(Mo/da/yr)

Inve

stig

atin

gF

i rm

orGe

olog

i st

Iden

tifi

cati

on Number and

Site

De

scri

ptio

n Wh

ere

noCity or

Co

unty

Number

San

Jaclnto

Fault

Zone.

San

Bern

ard!

no County (F

igs.

16

and

17)

(San

Bernardino)

(88)

652

San

Bernard!no

7/22

/77

San

Bernardino

Sout

hGary S. Ra

smus

sen

and

Associates

Project

#122

6

Tren

ch up to 11 feet deep,

across "a

eria

l photo

lineament

11 (CDMG, 1977tt),

no fa

ulti

ng

in Ho

loce

ne alluvium.

ON

Fig. 18

- L

ocat

ions

of

engi

neer

ing

geol

ogy

reports

alon

g San

Jaci

nto

fault

zone b

etween S

unny

mead

and I

dyllwild b

y Riverside

County n

umbe

r.

See

Fig.

1

for

location a

nd F

ig.

2 for

expl

anat

ion

of s

ymbols.

Fig.

19 -

Locations

of e

ngineering g

eology r

epor

ts al

ong

San

Jaci

nto

faul

t zone i

n He

met

area b

y Riverside

Coun

ty n

umbe

r.

See

Fig.

18

for l

ocation

and

Fig.

2

for

explanation

of s

ymbols.

Coun

ty

(Cit

y)of

Ju

risd

icti

on

Coun

ty(C

ity)

Fi l

eNumber

CDMG AP Fi l

eNumber

7-1/2

Minu

te

Quad

ran

gle(

s)

Date

of

Repo

rt(s

)(Mo/da/yr)

Investigating

F i r

m or

Ge

olog

i st

Iden

tifi

cati

on Number and

Site

De

scri

ptio

n Where

noCi

ty or

County Number

00

San

Jacinto

Fault

Zone

. Riverside

County (F

igs.

18

an

d 19

)

Riverside

Rive

rsid

e

Rive

rsid

e

Rive

rsid

e

R i ve rs i de

Rive

rsid

e

Riverside

Riversid

e

851

Sunnymead

11/3

0/72

Ga

llah

er and

Bovey

Trac

t No

. U6

16

One

tren

ch,

aver

age

depth

10 fe

et,

southwest

of San

Jaci

nto

fault

(CDM

G, 197Uk).

No

faul

ting

in Ho

loce

ne al

luvi

um (Qal of

Ro

gers

, 19

65).

Heme

t2/19/7U

Gary S. Rasmussen

and

Associates

Proj

ect

#103

3-0

Four trenches,

12-15

feet

de

ep,

acro

ss Ca

sa Lo

ma .

fault

(CDM

G, 1980J).

Trenches 1-

U:

faulting with ve

rtic

al of

fset

s up

to

5.5

feet

in Holocene alluvium (Q

al of Rogers,

1965

)

Heme

t11/11/7U

Gary

S. Ra

smus

sen

and

Asso

ciat

esProject

#1055-2

Four

tr

ench

es,

11-12

feet de

ep,

northeast

of Casa Loma fa

ult

(CDM

G, 1980J)

faul

ting

in Ho

loce

ne al

luvi

um (Qal of

Rogers,

1965

).No

Heme

t9/

18/7

UGary S. Rasmussen

and

Asso

ciat

esProject

#106

0

One

trench,

10-12

feet de

ep,

southwest

of San

Jaci

nto

faul

t (C

DMG,

19

80J)

. fa

ulti

ng

in Holocene alluvium (Qal of Ro

gers

, 19

65).

No

Heme

t9/18/7U

Gary S.

Rasmussen

and

Asso

ciat

esProject

#105

6

Thre

e tr

ench

es,

11-12

feet

de

ep,

acro

ss and

southwest

of C

asa

Loma

fa

ult

(CDM

G, 19

80J)

. Tr

ench

es

1 an

d 2:

no

rmal

fa

ulti

ng w

ith

offsets

up to 3

feet in

Holocene al

luvi

um

(Qal of Ro

gers

, 19

65).

Hemet

9/2U

/7U

Gary S. Ra

smus

sen

and

Associates

Project

#105

8

One

trench,

8-12

fe

et de

ep,

northeast

of Casa Lo

ma fault

(CDM

G, 1980J).

in Holocene alluvium (Q

al of Ro

gers

, 19

65).

No faulting

Hemet

9/2U

/7U

Gary S. Rasmussen

and

Associates

Proj

ect

#105

7

Two

tren

ches

, av

erag

e de

pth

11 feet,

acro

ss Ca

sa Lo

ma fault

(CDM

G, 19

80J)

. Tr

ench

es

1 an

d 2:

two

norm

al faults,

with combined to

tal

offs

et of U

feet

, in

Holocene

alluvium (Qal of Ro

gers

, 19

65).

Heme

t10

/15/

7UGary S

. Ra

smus

sen

and

Associates

Project

#107

0

No trenching

southwest

of Ca

sa Loma fault

(CDM

G, 1980J).

Fault

located

250

feet

no

rthe

ast

of si

te by

prominent

scarp

in Holocene alluvium (Qal of Rogers,

1965

).

County

(City)

of

Jurisd ict

ion

Coun

ty(City)

Fi le

Number

CDMG AP Fi le

Number

7-1/

2 Mi

nute

Quadrangle( s)

Date

of

Report( s)

(Mo/

da/y

r)

Inve

stig

atin

g F

i rm or

Ge

olog

i st

Identification Number and

Site De

scri

ptio

n Wh

ere

noCity or

County Number

vo

San Ja

cint

o Fault

Zone.

Riverside

County (F

igs.

18

an

d 19)

Riverside

Riverside

Rive

rsid

e

Rive

rsid

e

Rive

rsid

e

R i ve rs i de

Riverside

Rive

rsid

e

8 10 11 13 15 16 17

11 80 12 79 33

Sunn

ymea

d10/21/7U

Revi

sed

3/U/

75

Lewis

S. Lohr

Parcel Ma

p 62

86

Two

tren

ches

, maximum

dept

h 11 fe

et,

across Sa

n Jacinto

faul

t (CDMG, 197Uk).

Sout

heas

terl

y trench:

righ

t-la

tera

I fa

ulti

ng in

Ho

loce

ne alluvium (Q

al of

Ro

gers

, 19

65).

Heme

t10/8/7U

Gary

S. Ra

smus

sen

and

Associates

Proj

ect

#1062

One

tren

ch,

11-1

2 feet deep,

nort

heas

t of

Ca

sa Lo

ma fault

(CDMG, 1980J).

No

faulting in

Ho

loce

ne al

luvi

um (Q

al of

Rogers,

1965

).

San

Jacinto

10/2

3/71

* Pioneer

Cons

ulta

nts

Job

#195

1-00

1

Tren

ch,

maximum

dept

h 1U

fe

et,

sout

hwes

t of

Sa

n Ja

cint

o fa

ult

(CDMG, 19

80S)

. No

faulting in

Ho

loce

ne al

luvi

um (Qal of

Rogers,

1965

).

Hemet

10/25/7M

Gary

S.

Rasmussen

and

Associates

Proj

ect

#107

3

Two

trenches and

one

pit,

10

-11

feet de

ep,

nort

heas

t of

San

Jacinto

fault

(CDMG,

1980J).

No faulting in Ho

loce

ne alluvium (Qal of Rogers,

1965).

Heme

t9/

2M/7

UGa

ry S.

Rasmussen

and

Associates

Project

#105

9

No tr

ench

ing

northeast

of Casa Loma fault

(CDMG, 19

80J)

. Pr

esen

ce of

fa

ult

a fe

w hundred

feet

to th

e so

uthw

est

determined by

pr

ojec

tion

of

a

Iineation

on aerial

phot

os and

prev

ious

tr

ench

ing

in Ho

loce

ne al

luvi

um (Q

al of

Rogers,

1965).

NW-1

/U

IdylIwiId

11/1

2/7U

Re

vi sed

12/7

U

Lew

i s S.

Loh r

Baldy

Mountain Re

crea

tion

al

Vehi

cle

Park

No trenching

on Ho

t Sp

ring

s fault

(CDMG, 197t*p).

Fault

location based

on to

pogr

aphi

c ex

pres

sion

in

colluvial

depo

sits

of

Pleistocene

age

(Qc

of Ro

gers

, 19

65).

Hemet

10/1

5/7M

Gary S.

Rasmussen

and

Associates

Proj

ect

#106

8

No tr

ench

ing

sout

hwes

t of

Ca

sa Loma fault

(CDM

G, 19

80J)

. Fault

loca

ted

by prominent

scarp

65 fe

et no

rthe

ast

of site in

Ho

loce

ne al

luvi

um (Qal of

Rogers,

1965

).

Heme

t11

/26/

71Ga

ry S. Rasmussen

and

Asso

ciat

esProject

#107

6

Two

trenches,

10-12

feet

de

ep,

sout

hwes

t of

San

Jacinto

fault

(CDM

G, 197UJ).

No

faulting in

Ho

loce

ne al

luvi

um (Q

al of Rogers,

1965

).

County

(City)

of

Juri sdiction

County

(City)

Fi le

Number

CDMG AP Fi le

Number

7-1/2

Minu

te

Quadrangle(s)

Date

of

Repo

rt(s

)(M

o/da

/yr)

Invest igat ing

F i rm

or

Geol

og i st

Iden

tifi

cati

on Number and

Site De

scri

ptio

n Where

noCi

ty or

County Number

San

Jacinto

Faul

t Zone.

Rive

rsid

e County (F

igs.

18

and

19)

Rive

rs ide

Riverside

Rive

rs ide

Rive

rs ide

Riverside

Rive

rsid

e

Riverside

Riverside

R i ve rsi de

18 20 21 23 25 26 27 28

1U6 U6 517 U2 71 88

Hemet

10/2

5/7U

Gary

S.

Rasmussen

and

Associates

Proj

ect

#107

5

One

trench,

11 feet deep,

sout

hwes

t of

Ca

sa Loma fault

(CDMG, 19

80J)

. ing

in Ho

loce

ne al

luvi

um (Qal of Ro

gers

, 19

65).

No fa

ult-

Hemet

7/23

/75

Eart

h Science

Laboratories,

Inc.

Job

#337-S

Two

tren

ches

, av

erag

e de

pth

11-1

2 fe

et,

acro

ss San

Jacinto

fault

(CDM

G, 19

7UJ)

. No

faul

ting

in Ho

loce

ne al

luvi

um (Q

al of

Ro

gers

, 19

65).

Hemet

12/2

3/7U

Gary S.

Rasmussen

and

Associates

Project

#108

0

One

tren

ch,

11-13

feet deep,

nort

heas

t of

Casa Loma fault

(CDMG, 19

80J)

. ing

in Holocene al

luvi

um (Qal of

Ro

gers

, 19

65).

No fa

ult-

San

Jacinto

Heme

t2/12/75

Gary S. Rasmussen

and

Associates

Proj

ect

#108

6

Five

tr

ench

es,

10 feet deep,

sout

hwes

t of

San

Jacinto

fault

(CDM

G, 19

801,

j).

No

faul

ting

in Holocene alluvium (Q

al of

Ro

gers

, 19

65).

Hemet

2/1*1/75

Gary S.

Rasmussen

and

Associates

Proj

ect

#108

8

No tr

ench

ing

sout

hwes

t of

Casa Loma fa

ult

(CDM

G, 1980J).

Pres

ence

of

fault

1000+

feet to

the

nort

heas

t de

term

ined

by scarp

in Ho

loce

ne alluvium (Qal of Ro

gers

, 1965)

Heme

t3/U/75

Gary S.

Rasmussen

and

Associates

Proj

ect

#109

0

One

tren

ch,

aver

age

depth

9 fe

et,

northeast

of San

Jaci

nto

fault

(CDMG, 19

7UJ)

. No

faulting in

Holocene alluvium (Qal of

Rogers,

1965

).

San

Jacinto

3/10

/75

Lewi

s S.

Lohr

Job

#M-75-3

One

tren

ch,

10 fe

et deep,

sout

hwes

t of

Pa

rk Hi

ll fault

(Sha

rp,

1972

).

in Ho

loce

ne al

luvi

um (Qal of Rogers,

1965).

No fa

ulti

ng

San

Jaci

nto

3/2U/75

Gary

S.

Rasmussen

and

Asso

ciat

esPr

ojec

t #1

093

One

tren

ch,

81/2

fe

et deep,

northeast

of Bautista Creek

fault

(CDMG, 19

80S)

. No

faul

ting

in

Ho

loce

ne alluvium (Qal of

Rogers,

1965

).

San

Jaci

nto

3/20/75

Lewi

s S.

Lohr

Job

# 5-

75-3

One

tren

ch,

10 feet deep,

acro

ss Park Hi

ll fa

ult

(Sharp,

1972

).

Holocene alluvium (Qal of Ro

gers

, 19

65).

No faulting

in

County

(City)

of

Juri sd iction

Coun

ty(C

ity)

Fi le

Number

CDMG AP File

Number

7-1/

2 Mi

nute

Quad

ran

g Ie(s)

Date

of

Report(s)

(Mo/da/yr)

Invest igat in

g F

i rm

or

Geol

og i st

Identification Number and

Site De

scri

ptio

n Where

noCi

ty or County Number

San

Jaci

nto

Fault

Zone

. Ri

vers

ide

County (Figs. 18 an

d 191

Riverside

Rive

rsid

e

Riverside

Rive

rsid

e

Rive

rsid

e

Riverside

Rive

rsid

e

Riverside

Rive

rsid

e

29 30 31 32 33 36 37 38

89 75 126

130

125

1U5

140

1U2

158

San

Jacinto

U/4/

75Ga

ry S. Rasmussen

and

Associates

Proj

ect

#1096

One

tren

ch,

10 1/2

to 11 feet de

ep,

sout

hwes

t of

Bautista Creek fault

(CDMG, 19

801)

faulting

in Bautista Fo

rmat

ion

or Ho

loce

ne alluvium (Qc

and

QaI

of Rogers,

1965

).No

Heme

tU/

10/7

5 Lewis

S. Lo

hrJob

#6-75-U

Two

tren

ches

, maximum

depth

10 feet,

nort

heas

t of San

Jacinto fault

(CDM

G, 1980J).

No faulting in

Ho

loce

ne al

luvi

um (Qal of

Rogers,

1965

).

Sunnymead

5/21

/75

Gary

S. Rasmussen

and

Associates

Proj

ect

#110

1

Three

tren

ches

, approximately 10 feet deep,

acro

ss San

Jacinto fault

(CDM

G, 19

7UK)

Tren

ches

1-3:

reve

rse

faulting in

Ho

loce

ne al

luvi

um (Q

al of Rogers,

1965).

Heme

t3/

3/75

Gary

S. Ra

smus

sen

and

Associates

Proj

ect

#108

7

No tr

ench

ing

sout

hwes

t of

Casa Loma fa

ult

(CDMG, 1980J).

Fault

located

2100 fe

et

east

of si

te by

prominent

faul

t scarp

in Ho

loce

ne alluvium (Qal of Ro

gers

, 1965).

San

Jacinto

5/24

/75

Lewi

s S. Lo

hrJob

# 7-75-5

One

tren

ch,

10 feet deep,

acro

ss trace

of hi

dden

fa

ult

in Park Hi

ll fa

ult

zone

(CDMG, 19

7UI)

. No faulting

in Ho

loce

ne alluvium (Qal of Rogers,

1965).

San

Jacinto

6/30

/75

Lewi

s S. Lo

hrJob

# 8-75-6

One

tren

ch,

10 feet deep,

acro

ss trace

of Pa

rk Hill

fault

(Sharp,

1972

).

No

faulting

in Holocene al

luvi

um (Q

al of

Rogers,

1965

).

San

Jacinto

6/16/75

Gary

S. Rasmussen

and

Associates

Proj

ect

#110U

Four

tr

ench

es,

aver

agin

g 10 fe

et deep,

acro

ss Ca

sa Lo

ma fa

ult

(CDMG, 1980i).

Tren

ches

1

to U:

faulting

in Ho

loce

ne alluvium (Q

al of Rogers,

1965

).

Hemet

U/5/

75Ga

ry S. Ra

smus

sen

and

Associates

Proj

ect

#109

2

Three

tren

ches

, minimum de

pth

11 feet,

southwest

of Casa Lo

ma fault

(CDMG, 1980J)

faulting

in Ho

loce

ne al

luvi

um (Qal of

Ro

gers

, 1965

).

San

Jacinto

10/2

9/75

Gary

S. Ra

smus

sen

and

Associates

Project

#111

8

Thre

e tr

ench

es,

minimum

dept

h 11 fe

et,

nort

heas

t of

Casa Loma fault

(CDM

G, 1980i).

No faulting in

Ho

loce

ne alluvium (Qal of

Ro

gers

, 19

65).

No

County

(City)

of

Jurisdiction

Coun

ty(C

ity)

Fi le

Numbe r

CDMG AP Fi le

Number

7-1/

2 Minute

Quad

ran

gle(

s)

Date

of

Report( s)

(Mo/

da/y

r)

Investigating

Fi rm

or

Geologist

Identification Number and

Site Description Where no

City

or County Number

to

San

Jacinto Fa

ult

Zone.

Rive

rsid

e County (Figs. 18 an

d 19)

Rive

rs ide

Riversid

e

Rive

rsid

e

Rive

rside

Rive

rsid

e

Rive

rsid

e

Riverside

Rive

rsid

e

Rive

rside

3916

9

17U

213

211

1*7

(*8

1*9

190

207

210

227

Heme

t11/21/75

Gary

S. Rasmussen

and

Asso

ciat

esProject

#1121

Two

trenches,

averaging 11 fe

et de

ep,

northeast of

Casa Lo

ma fault

(CDM

G, 19

80J)

. No

fa

ulti

ng in

Ho

loce

ne alluvium (Q

al of

Rogers,

1965).

San

Jacinto

12/1

0/75

F. Al

len

Fleming

Two

tren

ches

, 10 fe

et deep,

east

of

Sa

n Jacinto fault

(CDM

G, 19

80i)

. in

Ho

loce

ne alluvium (Qal of

Rogers,

1965).

Tentative

Trac

t #6970 (U

U60)

No faulting

San

Jacinto

12/29/75

F. Al

len

Fleming

Thre

e tr

ench

es,

11 feet deep,

east

of

so

uthw

est

branch of San

Jacinto

fault

(CDMG, 1980i)

No faulting in

Ho

loce

ne alluvium (Qal of

Rogers,

1965

).

San

Jacinto

3/30/76

Irvi

ne Soils

Engi

neer

ing

and

Testing

Laboratory

Job

#1019-0

0

One

tr

ench

and

5 pits,

ap

pro

xim

ate

ly

8 fe

et

de

ep

, so

uth

we

st

of

Cas

a Lo

ma

fau

lt

(CD

MG

, 1

98

0!)

. N

o fa

ultin

g

in

Ho

loce

ne

alluviu

m

(Qal

of

Rogers

, 1

96

5).

Hem

et1/1

9/7

6G

ary

S

. R

asm

uss

en

an

d

Associa

tes

Pro

ject

#112

1*

Th

ree

tr

enches,

10

-13

fe

et

deep,

acro

ss

and

no

rth

ea

st

of

Cas

a Lo

ma

fau

lt

(CD

MG

, 1

98

0J).

T

ren

ch

1-A

: fa

ultin

g

in

Holo

cene

alluviu

m

(Qal

of

Rogers

, 1

96

5).

Hem

et3/5

/76

Le

wis

S

. Lohr

One

tr

ench,

10-1

2

fee

t deep,

south

west

of

unna

med

fa

ult

in

Cas

a Lo

ma

fau

lt

zone

(CD

MG

, 1

98

0J).

N

o fa

ultin

g

in

Holo

cene

alluviu

m

(Qal

of

Rogers

, 1

96

5).

San

Ja

cin

to3

/22

/76

C

harles

Price

Job

#346-7

57

One

tr

en

ch

, 9-1

0

fee

t deep,

nort

heast

of

Cas

a Lo

ma

fau

lt

(CD

MG

, 1980i).

No

faultin

g

in

Ho

loce

ne

alluviu

m

(Qal

of

Rogers

, 1

96

5).

Hem

et2

/25

/76

Ga

ry

S.

Rasm

uss

en

and

Associa

tes

Pro

ject

#1

12

8

Two

trenches,

10-1

2

feet

deep,

nort

heast

of

an

d

acro

ss

Cas

a Lo

ma

fau

lt

(CD

MG

, 1980J).

T

rench

2:

faultin

g

in

Ho

loce

ne

a

llu

viu

m

(Qal

of

Rogers

, 1

96

5).

San

Ja

cin

to6/3

/76

Le

wis

S

. Lohr

One

tr

ench,

10

-12

fe

et

deep,

acro

ss

tra

ce

of

unna

med

fa

ult

in

Cas

a L

om

a-B

au

tista

C

ree

k fa

ult

zon

e

(CD

MG

, 1

98

0i).

No

faultin

g

in

Holo

cene alluviu

m

(Qal

of

Rogers

, 1965).

County

(Cit

y)of

Juri

sdic

tion

Coun

ty(City)

Fi le

Number

CDMG AP Fi te

Number

7-1/

2 Mi

nute

Qu

ad ran

g Ie

(s)

Date

of

Repo

rt(s

)(M

o/da

/yr)

Invest igat in

g F

i rm

or

Geol

og i st

Iden

tifi

cati

on Number and

Site De

scri

ptio

n Where

noCity or

County Nu

mber

Sani

Jacinto

Fault

Zone

. Riverside

County (Figs. 18

an

d 19

)

Rive

rs ide

Rive

rs ide

Riverside

Rive

rsid

e

Rive

rsid

e

Rive

rsid

e

Rive

rsid

e

Riverside

Riverside

52 55 56 57 58 60

315

321

332

330

334

354

353

356

Heme

t12

/26/

74Gary S.

Rasmussen

and

Associates

Proj

ect

#107

9

One

trench,

aver

agin

g 10

fe

et de

ep,

nort

heas

t of

unnamed

fault

in San

Jacinto

fault

zone (C

DMG,

19

80J)

. No

faulting in

Holocene al

luvi

um (Qal of Rogers,

1965

).

San

Jaci

nto

7/29

/76

Lewis

S. Lo

hrJob

#13-

76-7

One

trench,

10-12

feet de

ep,

sout

hwes

t of Casa Lo

ma fault

(CDM

G, 1980i)

faulting in Holocene al

luvi

um (Q

al of

Rogers,

1965

).

San

Jaci

nto

8/23/76

Lewis

S. Lo

hrJo

b #114-76-8

One

tren

ch,

10-11

feet

deep,

sout

hwes

t of

Ca

sa Lo

ma fault

(CDMG, 1980i)

faul

ting

in

Ho

loce

ne alluvium (Q

al of

Ro

gers

, 19

65).

No No

Hemet

9/9/

76Stickel

and

Asso

ciat

esProject

#182

9-00

1

One

trench,

aver

age

dept

h 10

fe

et,

acro

ss un

name

d fa

ult

in San

Jacinto

fault

zone

(C

DMG,

19

74J)

. No

faulting

in Ho

loce

ne alluvium (Q

al of Rogers,

1965).

San

Jaci

nto

10/13/76

Lewi

s S.

Lo

hrJo

b #1

5-76

-10

One

tren

ch,

maximum

dept

h 11

fe

et,

acro

ss un

name

d (Bautista

Cree

k) fault

in San

Jaci

nto

faul

t zone (CDMG, 1980i).

No faulting

in "Pleistocene Ba

utis

ta Fo

rmat

ion

(?)"

(Qc

of Rogers,

1965

).

San

Jacinto

10/2

1/76

En

vico

m Co

rpor

atio

nJo

b #CV

1864-W

Four

tr

ench

es,

10 feet de

ep,

acro

ss Sa

n Jacinto

and

Clar

emon

t fa

ults

(CDMG, 19

801)

. No

faulting in Ho

loce

ne alluvium (Q

al of Rogers,

1965

).

Hemet

8/5/

76Gary S. Rasmussen

and

Asso

ciat

esProject

#1151

One

tren

ch,

10-11

feet deep,

sout

hwes

t of Ca

sa Lo

ma fault

(CDM

G, 1980J).

No

faul

ting

in Ho

loce

ne alluvium (Qal of

Rogers,

1965

).

San

Jacinto

10/4/76

Envi

com

Corp

orat

ion

Tentative

Trac

t 80

72

Thre

e tr

ench

es,

averaging

10 feet de

ep,

nort

heas

t of

San Ja

cint

o fa

ult

and

east

of

the

Hot

Springs

faul

t (C

DMG,

19

80i)

. No faulting

in Ho

loce

ne alluvium or

fan

depo

sits

(Q

al of Ro

gers

, 19

65).

Hemet

9/1/

76Pioneer

Cons

ulta

nts

Job

#242

9-00

1

Thre

e tr

ench

es,

10-1

2 fe

et deep,

nort

heas

t of unnamed

fault

in Casa Lo

ma fault

zone

(C

DMG,

1980J).

No faulting

in Ho

loce

ne al

luvi

um (Q

al of Ro

gers

, 1965).

County

(City)

of

Jurisdiction

County

(Cit

y)Fi

le

Numb

er

CDMG AP Fi le

Numb

er

7-1

/2

Min

ute

Q

uad

ran

gle

(s)

Date

of

Repo

rt(s

)(M

o/da

/yr)

Invest iga

ting

F

i rm

or

Geol

og i st

Iden

tifi

cati

on Number an

dSi

te De

scri

ptio

n Where

noCi

ty or

County

Numb

er

San

Jacinto

Fault

Zone

. Riverside

Coun

ty (F

igs.

18

and

19)

Riverside

Riversid

e

Riverside

Riverside

R i ve rs

i de

Rive

rsid

e

Riverside

Riversid

e

Riverside

Riverside

61 62 63 6U 65 66 67 68 76

355

36U

382

U07

412

U2U

U22

580

475

San

Jaci

nto

11/1/76

Lewis

S. Lohr

Job

#17-

76-1

0

One

tren

ch,

8-1U

fe

et deep,

sout

hwes

t of

San

Jacinto

fault

(CDMG, 19

80i)

. No

faulting in

Ho

loce

ne alluvium (Q

al of

Rogers,

1965

).

Hemet

11/2U/76

Lewi

s S.

Lo

hrJo

b #1

8-76

-11

One

tren

ch,

10-11

feet deep,

nort

heas

t of unnamed

fault

in Ca

sa Loma-Bautista

Creek

faul

t zo

ne (C

DMG,

19

80J)

. No faulting in

Ho

loce

ne alluvium (Qal of

Rogers,

1965).

San

Jacinto

12/20/76

Lewis

S. Lohr

Job

#19-

76-1

2

One

tren

ch,

10-1

2 fe

et de

ep,

sout

hwes

t of

un

name

d fault

in Ca

sa Loma-Bautista

Creek

faul

t zo

ne (CDMG, 19

80S)

. No fa

ulti

ng

in Ho

loce

ne alluvium (Qal of

Rogers,

1965).

Hemet

1/25

/77

Lewis

S. Lo

hrJo

b #20-77-1

One

tren

ch,

10-11

feet deep,

nort

heas

t of Casa Lo

ma fa

ult

(CDMG, 1980J)

in Ho

loce

ne al

luvi

um (Q

al of

Ro

gers

, 19

65).

San

Jaci

nto

1/2U/77

Gary

S.

Rasmussen

and

Associates

Project

#117

2

One

tren

ch,

10-1

3 feet deep,

nort

heas

t of

Ca

sa Loma fa

ult

(CDMG, 1980i)

in Ho

loce

ne al

luvi

um (Q

al of Rogers,

1965).

No fa

ulti

ng

No fa

ulti

ng

Hemet

2/19

/77

Lewis

S. Lo

hrJo

b #22-77-2

One

tren

ch,

10 fe

et deep,

northeast

of un

name

d fault

in Ca

sa Loma fault

zone

(C

DMG,

1980J).

No fa

ulti

ng in

Ho

loce

ne alluvium (Q

al of Ro

gers

, 1965).

Hemet

2/15

/77

Lewis

S. Lohr

Job

#21-77-2

One

tren

ch,

10 feet deep,

acro

ss un

name

d fa

ult

in Casa Loma fault

zone

(C

DMG,

1980J).

No faulting

in Ho

loce

ne al

luvi

um (Q

al of Ro

gers

, 1965).

Heme

t1/11/77

Gary

S. Rasmussen

and

Associates

Project

#1169

One

tren

ch an

d a

pit, 11

-12

feet deep,

northeast

of San

Jacinto

fault

(CDMG, 19

7UJ)

. No

fa

ulti

ng in la

te Ho

loce

ne alluvium (Qal of Rogers,

1965).

San

Jaci

nto

3/21/77

Gary S. Rasmussen

and

Associates

Proj

ect

#115

8

One

tren

ch,

11-1

2 feet deep,

sout

hwes

t of

Casa Lo

ma fault

(CDM

G, 19

80S)

. No

faul

ting

in

Ho

loce

ne alluvium (Qal of

Ro

gers

, 19

65).

San

Jacinto

5/7/

77Lewis

S. Lo

hrJo

b #25-77-5

One

tren

ch,

maximum

dept

h 11

feet,

across unnamed

fault

in Ca

sa Loma-Bautista

Creek

faul

t zo

ne (C

DMG,

1980i).

No faulting

in Ho

locene

alluvium (Q

al of Ro

gers

, 19

65).

County

(Cit

y)of

Juri

sd iction

Coun

ty(C

ity)

Fi le

Number

CDMG AP Fi l

eNumber

7-1/2

Minu

te

Quad

ran

gle(

s)

Date

of

Repo

rt( s)

(Mo/

da/y

r)

Inve

stig

at ing

Fi rm

or

Geol

og i st

Iden

tifi

cati

on Number an

dSite Description

Where

noCi

ty or

County Number

San

Jaci

nto

FauIt

Zone

, Ri

vers

ide

County (Figs. 18

an

d 19j

Rive

rsid

e

Rive

rsid

e

Riversid

e

Rive

rsid

e

Rive

rsid

e

Rive

rside

Riverside

Rive

rsid

e

Rive

rside

77 80 81 83 85 86 87 89 90

708

485

480

483

518

534

549

1252

San

Jaci

nto

11/1

7/75

Gary

S.

Ra

smus

sen

and

Associates

Proj

ect

#111

9

Two

trenches,

minimum

dept

h 11

fe

et,

acro

ss Casa Lo

ma and

related

en echelon

faul

ts

(CDM

G, 19

80i)

. Trenches 1,2:

normal and

righ

t-la

tera

I fa

ulti

ng

in Holocene alluvium

(Qal

of

Rogers,

1965

).

San

Jaci

nto

5/17/77

Lewis

S. Lo

hrJo

b #27-77-5

Three

tren

ches

, ma

ximu

m de

pth

13 feet,

acro

ss Casa Loma fa

ult

(CDM

G, 19

80i)

. Trench

1:

series of

fa

ults

in

Ho

loce

ne alluvium w

ith

disp

lace

ment

s varying

betw

een

.5 and

7 feet.

Tren

ch A:

nume

rous

st

eppe

d normal faults

in

Ho

loce

ne alluvium.

Trench B:

numerous,

smal

l, stepped

normal fa

ults

and

one

prom

inen

t fa

ult

with gouge

in

Holo

cene

al

luvi

um (Q

al of Rogers,

1965

).

Hemet

4/5/

76Gary S.

Rasmussen

and

Asso

ciat

esProject

#113

2

Five

tr

ench

es,

10-1

2 fe

et deep,

acro

ss and

nort

heas

t of

Casa Loma fault

(CDMG, 1980J)

Tren

ches

2,

A,B,

C:

faulting in

Ho

loce

ne alluvium (Qal of Rogers,

1965

).

Hemet

6/5/

77Lew is

S.

Loh r

Job

#29-

77-6

One

tren

ch,

10 feet de

ep,

sout

hwes

t of

Casa Loma fault

(CDMG, 1980J).

in Ho

loce

ne al

luvi

um (Qal of

Rogers,

1965

).No fa

ulti

ng

Hemet

7/15/77

Lewis

S. Lo

hrJo

b #3

2-77

-7

Two

tren

ches

, 10

feet de

ep,

across un

name

d fault

(Cas

a Loma fa

ult

?) (CDMG, 1980J).

Normal faulting

in bo

th trenches in Ho

loce

ne alluvium (Qal of Ro

gers

, 19

65).

San

Jacinto

7/5/77

Gary S. Ra

smus

sen

and

Asso

ciat

esProject

#121

0

Trench,

aver

agin

g 11

feet deep,

sout

hwes

t of

Claremont

fault

(CDM

G, 1980i).

No

faul

ting

in Ho

loce

ne al

luvi

um (Qal of

Rogers,

1965).

San

Jaci

nto

8/15

/77

Lewis

S. Lo

hrJob

#33-

77-8

One

tren

ch,

maximum

dept

h 12

fe

et,

acro

ss hi

dden

fault

nort

heas

t of Pa

rk Hi

ll fault

(CDMG, 1974!).

No fa

ulti

ng

in Ho

loce

ne alluvium (Qal of

Rogers,

1965).

Heme

t8/

29/7

7 Le

wis

S. Lo

hrJo

b #35-77-8

One

trench,

10 feet deep,

nort

heas

t of

un

name

d fa

ult

in Sa

n Jacinto

fault

zone

(C

DMG,

1974J).

No fa

ulti

ng

in Pleistocene

fanglo

merates

(Qc

of Rogers,

1965).

San

Jaci

nto,

He

met

5/10/77

Gary

S.

Ra

smus

sen

and

Associates

Project

#1192

Thre

e tr

ench

es,

maxi

mum

depth

20 fe

et,

sout

hwes

t of Ca

sa Lo

ma fault

(CDMG, 1980i,j).

No faulting

in Holocene alluvium (Q

al of Rogers,

1965

).

Coun

ty

(City)

of

Juri

sdic

tion

Coun

ty(City)

File

Numbe r

CDMG AP Fi le

Numb

er

7-1/2

Minu

te

Quad ran

gle(

s)

Date

of

Report(s)

(Mo/

da/y

r)

Investigating

F i r

m or

Ge

olog

i st

Iden

tifi

cati

on Number and

Site De

scri

ptio

n Wh

ere

noCity o

r County Number

San

Jacinto

Fault

Zone

, Riverside

County (Figs. 18

and. 1

9.)

Riverside

Rive

rsid

e

Rive

rsid

e

Rive

rsid

e

R i ve rs

i de

R i ve rs

i de

Ri ver

s id

e

Riverside

Riverside

91 92 93

574

583

573

95 99 100

101

108

58*4

596

616

630

632

659

San

Jacinto

5/10

/77

Gary

S. Ra

smus

sen

and

Asso

ciat

esPr

ojec

t #1

192

Thre

e tr

ench

es,

maxi

mum

dept

h 17

fe

et,

northeast

of inferred trace

of Casa Loma fa

ult

(CDM

G, 19

80i)

. No fa

ulti

ng

in Ho

loce

ne al

luvi

um (Q

al of

Ro

gers

, 19

65).

Hemet

10/6

/77

Stickel

and

Asso

ciat

esTentative

Trac

t #9

567

One

trench,

aver

age

depth

10 fe

et,

northeast

of un

name

d fault

in San

Jaci

nto

fault

zone

(C

DMG,

19

7**j

).

No faulting

in Ho

loce

ne alluvium (Qal of Rogers,

1965

).

San

Jacinto

9/27

/77

Lewis

S. Lo

hrJob

#37-77-9

Two

tren

ches

, maximum

dept

h 12 fe

et,

acro

ss Sa

n Jacinto fault

(CDMG, 1980J).

Tren

ch 1:

maximum

displacement of

2.

U fe

et by

re

verse

and

right-lateraI

(?)

dis­

placement.

Tren

ch 2:

several

faul

ts ex

pose

d which exhibited

norm

al or

re

vers

e displacements fr

om 1-6

inch

es.

Faulting in

Ho

loce

ne alluvium (Q

al of Rogers,

1965).

Heme

t10/U/77

Lewis

S. Lo

hrJob

#38-77-10

Seve

n tr

ench

es,

10 feet deep,

acro

ss Casa Loma fa

ult

(CDMG, 1980J).

Tren

ches

1-7:

faul

ting

in Ho

loce

ne alluvium (Q

al of Ro

gers

, 1965

) wi

th "t

hree

displacement events"

with of

fset

s up to

1 fo

ot.

San

Jacinto

6/12

/77

Lewis

S. Lo

hrJob

#30-77-6

One

tren

ch,

maximum

dept

h 13

fe

et,

sout

hwes

t of

Casa Loma fault

(CDM

G, 1980i).

No

faul

ting

in Ho

loce

ne alluvium (Q

al of

Rogers,

1965

).

Heme

t11/1/77

Lewis

S. Lo

hrJob

#4*1-77-11

Two

tren

ches

, 6-

15 feet de

ep,

southwest

of Casa Lo

ma fa

ult

(CDM

G, 19

80J)

fa

ulti

ng

in Ho

loce

ne alluvium (Qal of Rogers,

1965

).No

San

Jac into

11/2

1/77

Gary S. Rasmussen

and

Asso

ciat

esP

roje

ct

#12*

*8

One

tr

en

ch

, 10-1

5

fee

t deep,

nort

heast

of

Cas

a Lo

ma

fau

lt

(CD

MG

, 1980i).

faultin

g

in

Holo

cene alluviu

m

(Qal

of

Rogers

, 1

96

5).

No

San

Jacin

to1

2/9

/77

Lew

is

S.

Lo

hr

Job

#U2-77-12

Four

tr

ench

es,

maximum

dept

h 1**

feet

, ac

ross

trac

e of

un

name

d fault

in Ca

sa Lo

ma-

Baut

ista

Cr

eek

fault

zone

(C

DMG,

19

80!)

. All

four

trenches exposed

evidence of

norm

al faulting in

Ho

loce

ne alluvium (Qal of

Ro

gers,

1965

).

San

Jacinto

12/1

6/77

Lewis

S. Lo

hrJob

#U3-77-12

Two

trenches,

maximum

dept

h 12 fe

et,

acro

ss Ca

sa Lo

ma and

Bautista Creek fa

ults

(CDMG, 1980!).

Tren

ches

1,

2:

faul

ting

in

Ho

loce

ne alluvium (Q

al of

Rogers,

1965).

Coun

ty

(Cit

y)of

Jurisdlet io

n

County

(Cit

y)File

Number

CDMG AP File

Numb

er

7-1/

2 Minute

Quad ran

gle(

s)

Date

of

Report(s)

(Mo/

da/y

r)

Investigat ing

F i r

m or

Ge

olog

i st

Iden

tifi

cati

on Number an

dSite De

scri

ptio

n Where

noCity or C

ounty

Number

San

Jacinto

Fault

Zone

. Riverside

Coun

ty (F

igs.

18

an

d 19

)

Rive

rsid

e 10

9 658

San

Jaci

nto

1/6/78

Lewis

S. Lo

hr

Rive

rsid

e

Riversid

e

Rive

rsid

e

Rive

rsid

e

Riversid

e

Job

#45-

78-1

110

111

112

114

115

670

633

669

676

68(4

One

tren

ch,

12 feet deep,

acro

ss tr

ace

of hi

dden

fa

ult

in Park Hi

ll fa

ult

zone

(C

DMG,

19

7i4i

).

No faulting in Ho

loce

ne alluvium (Q

al of Ro

gers

, 1965).

Heme

t12/28/77

Lewis

S. Lo

hrJo

b #4

4-77

-12

Two

tren

ches

, 10

-14

feet deep,

acro

ss Casa Lo

ma fault

(CDMG, 19

80J)

. Tr

ench

es

1 and

2:

normal fa

ulti

ng in

Ho

loce

ne al

luvi

um (Qal of Rogers,

1965

).

Heme

t1/

9/78

Lewis

S. Lo

hrJo

b #4

6-78

-1

One

trench,

appr

oxim

atel

y 10

feet de

ep,

northeast

of un

name

d fault

in San

Jacinto

fault

zone (C

DMG,

1980J).

No fa

ulti

ng

in Ho

loce

ne al

luvi

um (Qal of Rogers,

1965).

San

Jacinto

1/30/78

Lewi

s S. Lo

hrJo

b #48-78-1

One

trench,

10 feet deep,

northeast

of hi

dden

fault

in Park Hi

ll fault

zone

(CDMG, 1974J).

No faulting in Ho

loce

ne alluvium (Qal of Rogers,

1965).

San

Jaci

nto

2/15

/78

Gary

S.

Rasmussen

and

Asso

ciat

esPr

ojec

t #1292

One

tren

ch,

11-12

feet de

ep,

nort

heas

t of

Casa Loma fault

(CDM

G, 19

80S)

, in Ho

loce

ne alluvium (Qal of Rogers,

1965

).No faulting

San

Jaci

nto

2/22/78

Lewis

S. Lo

hrJob

#50-78-2

Rive

rsid

e 11

7 683

Riverside

119

745

Riverside

120

725

Thre

e tr

ench

es,

maximum

dept

h 12

feet,

acro

ss trace

of hi

dden

fa

ult

in Pa

rk Hi

ll

fault

zone

(C

DMG,

19

74J)

. No

faulting in

Holocene alluvium (Qal of

Rogers,

1965).

Heme

t11/23/77

Gary S.

Ra

smus

sen

and

Asso

ciat

esPr

ojec

t #1270

One

tren

ch 11-13

feet deep so

uthw

est

of Ca

sa Lo

ma fault

(CDMG

1980

J).

Frac

ture

s pr

esen

t but

no faulting in

Ho

loce

ne al

luvi

um (Q

al of Rogers 1965).

San

Jacinto

3/29

/78

Gary S.

Rasmussen

and

Associates

Proj

ect

#128

6

Two

tren

ches

, av

erag

ing

10 feet deep,

northeast

of Casa Loma fa

ult

(CDMG, 19

801)

. faul

ting

in Ho

loce

ne al

luvi

um (Qal of Rogers,

1965).

No

Heme

t2/9/78

Lewis

S. Lo

hrJob

#49-78-2

One

tren

ch,

10-11

feet deep,

nort

heas

t of Ca

sa Loma fault

(CDM

G, 1980J).

No faulting

in Holocene alluvium (Qal of

Ro

gers

, 19

65).

County

(City)

of

Jurisdiction

County

(City)

File

Number

CDMG AP Fi l

eNumber

7-1/

2 Mi

nute

Qu

ad ran

gle(

s)

Date

of

Report(s)

(Mo/

da/y

r)

Invest igat in

g F

i rm

or

Geol

og i st

Iden

tifi

cati

on Number and

Site De

scri

ptio

n Wh

ere

noCity or County Nu

mber

ON oo

San

Jacinto

Fault

Zone.

Rive

rsid

e County (F

igs.

18

and

19)

Rive

rsid

e

Riversid

e

Riverside

Rive

rs ide

Riverside

R i ve rs i de

121

123

125

739

75U

126

127

753

756

130

778

San

Jaci

nto

3/13/78

Lewis

S. Lo

hrJo

b #5

1-78

-3

Five tr

ench

es,

aver

agin

g 10

feet de

ep,

acro

ss tr

ace

of un

name

d fault

in Ca

sa Loma-

Baut

ista

Cr

eek

faul

t zone (C

DMG,

1980i).

No fa

ulti

ng

in Hp

loce

ne alluvium (Qal of

Roge

rs,

1965

).

*

Hemet

1/21/78

Lewis

S. Lo

hrJo

b #47-78-1

Four

tr

ench

es,

maximum

16 fe

et de

ep,

across Casa Loma fault

(CDMG,

1980

j').

1-

U:

Normal fa

ulti

ng

in Ho

loce

ne al

luvi

um (Qal of Ro

gers

, 19

65).

Trenches

San

Jacinto

U/7/

78Ga

ry S.

Rasmussen

and

Associates

Project

#130

7

Four tr

ench

es,

aver

agin

g 10

feet deep,

across,

east and

west of Park Hi

ll fault

(CDM

G, 197MI).

Tren

ch 2:

no

rthe

ast

trending of

fset

ob

serv

ed in Ho

loce

ne alluvium

(Qal of Ro

gers

, 19

65)

but

was

attr

ibut

ed to

"s

econ

dary

ef

fect

s of st

rong

ground

motion"

such as "h

ydro

cons

olid

atio

n of

su

bsur

face

soils" or

"liquefaction."

San

Jaci

nto

5/16/78

Lewis

S. Lohr

Job

#60-

78-5

One

tren

ch,

10 feet deep,

nort

heas

t of

Ca

sa Lo

ma fault

(CDMG, 1980J).

in Ho

loce

ne al

luvi

um (Qal of

Ro

gers

, 19

65).

No faulti ng

San

Jacinto

U/22

/78

Lewis

S. Lohr

Job

#57-78-U

Five

tr

ench

es,

maximum

depth

1U fe

et,

across tr

ace

of un

name

d fault

and

Casa Loma

or re

late

d fa

ult

in San

Jaci

nto

fault

zone

(C

DMG,

1980i).

Displacement observed in

tren

ches

1 and

U ac

ross

Casa Loma or

related

fault

in Ho

loce

ne st

ream

deposits

(Qal of Rogers,

1965

).

Tren

ch 5:

clay fi

lled

fr

actu

res

and

2 inch ve

rtic

al di

s­

plac

emen

t at

trib

uted

to

settlement on un

name

d fault

in Ho

loce

ne alluvium (Qal of

Rogers,

1965

).

Lake

view

6/3/

78Lewis

S. Lohr

Job

#61-

78-6

Two

tren

ches

, ap

prox

imat

ely

10 feet deep,

acro

ss and

west of

Casa Loma fault

(CDM

G, 197UI).

Trench 1:

fa

ulti

ng

in Ho

loce

ne alluvium (Qal of

Rogers,

1965

).

Riversid

e

Riverside

131

132

779

789

Hemet

6/30

/78

Lewis

S. Lo

hrJo

b #63-78-6

One

trench,

appr

oxim

atel

y 10

feet de

ep,

nort

heas

t of Casa Loma fault

(CDMG, 1980J)

No fa

ulti

ng

in Ho

loce

ne alluvium (Qal of

Ro

gers

, 19

65).

San

Jacinto

U/28

/78

Lewis

S. Lo

hrJo

b #58-78-U

One

trench,

maximum

depth

14 fe

et,

acro

ss Ca

sa Lo

ma fa

ult

(CDMG, 1980i).

Normal

faul

ting

in Ho

loce

ne al

luvi

um (Qal of Ro

gers

, 19

65).

County

(City)

of

Juri

sdic

tion

Coun

ty(City)

Fi le

Numbe r

CDMG AP Fi le

Number

7-1/2

Minu

te

Quad

rangle(s)

Date of

Report(s)

(Mo/da/yr)

Investigat ing

F i r

m or

Ge

olog

i st

Identification Nu

mber

and

Site Description

Wher

e no

City or

Cou

nty

Number

ON

San

Jaci

nto

Fault

Zone.

Riverside

County (F

igs.

18

and

19)

Rive

rsid

e

R i ve rs i de

Rive

rsid

e

Rive

rsid

e

Rive

rsid

e

Rive

rsid

e

Rive

rsid

e

Riverside

133

13U

135

138

1U5

788

786

787

810

993

1U6

9U8

11*7

151

860

880

Heme

t6/

16/7

8Ga

ry S.

Rasmussen

and

Associates

Proj

ect

#135

9

Two

tren

ches

, 10

-11

feet

de

ep,

acro

ss and

sout

hwes

t of San

Jaci

nto

fault

(CDMG, 1980J)

No faulting in Ho

loce

ne alluvium (Q

al of

Ro

gers

, 1965).

San

Jaci

nto

3/28/78

Lewis

S. Lo

hrJob

#53-78-3

One

tren

ch,

maximum

dept

h 13

feet,

acro

ss unnamed

fault

in San

Jaci

nto

fault

zone

(C

DMG,

1980i).

No faulting

in Ho

loce

ne a Il

uviu

m (QaI of

Rogers,

1965

).

San

Jacinto

5/3/

78Lewis

S. Lo

hrJo

b #5

9-78

-5

One

tren

ch,

10 feet deep,

nort

heas

t of Park Hi

ll fault

and

hidd

en fault

(CDMG, 19

7UJ)

. No

fa

ulti

ng

in Ho

loce

ne alluvium (Qal of Ro

gers

, 19

65).

San

Jaci

nto

7/8/

78Lewis

S. Lo

hrJo

b #6

U-78

-7

Two

tren

ches

, maximum

depth

1U fe

et,

west

of San

Jacinto

fault

(CDM

G, 19

80i)

. No

faulting in

Ho

loce

ne alluvium (Qal of

Rogers,

1965

).

San

Jaci

nto

02/77

10/7

8Irvine So

iIs

Eng in

eeri

ngJo

b #1039-00 and

1575-00

Five

tr

ench

es,

maximum

dept

h 12

feet,

acro

ss Ca

sa Lo

ma fault

(CDM

G, 19

80i)

. Trenches

3,U, and

5:

offsets

attributable to

faulting in

be

dded

clayey silt layer

in Holocene

allu

vium

(Q

al of

Ro

gers

, 19

65).

Heme

t5/

U/78

Gary S. Ra

smus

sen

and

Asso

ciat

esProject

#130

8

Six

tren

ches

, 10

-12

feet

deep,

acro

ss Casa Loma fault

(CDMG, 1980J).

Trenches

1,2,3,i*,5,:

faulting wi

th vertical of

fset

s up to

1 fo

ot in

Ho

loce

ne alluvium (Q

al

of Ro

gers

, 19

65).

Heme

t8/

31/7

8 Lewis

S. Lo

hrJo

b #67-78-8

Three

tren

ches

, 10

feet deep,

sout

hwes

t of Casa Loma fault

(CDM

G, 19

80J)

. in Ho

loce

ne alluvium (Qal of Ro

gers

, 1965).

No fa

ulti

ng

San

Jacinto

U/23

/77

Lewis

S. Lo

hr

and

Associates

Job

#2U-77-U

Six

tren

ches

, av

erag

ing

10 feet de

ep,

acro

ss and

sout

hwes

t of Casa Lo

ma fa

ult

(CDM

G, 1980i).

Vert

ical

displacements

up to 2U inches in northerly

diagonal tr

ench

and

in two

shor

t tr

ench

es

in Ho

loce

ne alluvium (Qal of Ro

gers

, 19

65).

County

(City)

of

Jurisdiction

Coun

ty(C

ity)

File

Number

CDMG AP Fi le

Numb

er

7-1/

2 Minute

Quad

rangle(s)

Date

of

Report(s)

(Mo/

da/y

r)

Inve

stig

at ing

Fi rm or

Geologist

Iden

tifi

cati

on Number and

Site

De

scri

ptio

n Where

noCi

ty or

County Number

San

Jaci

nto

Faul

t Zo

ne.

Rive

rsid

e County (F

igs.

18 and

19)

Rive

rs ide

158

Riversid

e

Rive

rsid

e

Rive

rsid

e

Rive

rsid

e

160

163

16M

166

926

927

9U5

956

Riversid

e

Rive

rsid

e

Rive

rs ide

171

173

182

1205

969

996

San

Jaci

nto

1/16

/79

Gary

S.

Ra

smus

sen

and

Asso

ciat

esProject

#1M2

8

Seve

n trenches,

10-1

2 feet de

ep,

acro

ss Bautista Creek

fault

and

rela

ted

faul

ts(C

DMG,

1980i).

Three

faul

t zo

nes

identified fr

om offset ob

serv

ed

in tr

ench

es1,

U,5,

6 an

d 7.

Faul

t zone 1:

faul

ting

in

late Pleistocene

Baut

ista

Fo

rmat

ion

(Qc

of Ro

gers

, 19

65).

Fa

ult

zone

2:

late Pl

eist

ocen

e Ba

utis

ta be

ds fa

ulte

d against

Holo

cene

(?

) al

luvi

um (Q

c and

QaI

of Rogers,

1965

).

Faul

t zo

ne 3:

fa

ulti

ng

inBautista Fo

rmat

ion,

no fa

ulti

ng

in ov

erly

ing

Holo

cene

alluvium (Qc

and

QaI

of Rogers,

1965

).

San

Jacinto

10/16/7U

Lewis

S. Lo

hr

No tr

ench

ing

in Park Hi

ll fa

ult

zone

(C

DMG,

19

74i)

. faulting fo

und.

Heme

t2/

2/79

Lewis

S. Lohr

Parcel Map

13825

No physiographic

evidence for

Job

#71-79-2

One

tren

ch,

10 feet de

ep,

sout

hwes

t of

unnamed

fault

in Casa Loma-Bautista

Cree

k fault

zone

(C

DMG,

19

80J)

. No

fa

ulti

ng

in Holocene alluvium (Qal of Rogers,

1965).

El Ca

sco

2/10

/79

Lewis

S. Lo

hrJo

b #7

2-79

-2

No tr

ench

ing

in San

Jacinto

fault

zone (C

DMG,

19

7Mm)

. Lo

cati

on of

fault

base

d on

shear

and

fracture zo

ne in Pliocene non-marine rocks

(PC

of Rogers,

1965).

Hemet

3/5/

79Gary S. Ra

smus

sen

and

Asso

ciat

esProject

Thre

e tr

ench

es,

10-1

2 fe

et de

ep,

acro

ss Ca

sa Lo

ma fault

(CDM

G, 19

80J)

. Fr

actu

ring

and

offset be

ddin

g wi

th minimum

vertical di

spla

ceme

nts

of 5

feet in

Ho

loce

ne al

luvi

um

(Qal of Rogers,

1965

).

San

Jaci

nto

1/31/79

Gary

S.

Ra

smus

sen

an

d As

soci

ates

Project

One

tren

ch,

10-1

2 feet deep,

sout

hwes

t of Ca

sa Loma fault

(CDMG, 19

80i)

. in Ho

loce

ne al

luvi

um (Q

al of

Ro

gers

, 19

65).

San

Jacinto

1/3/

79Gary S.

Ra

smus

sen

and

Associates

Project

/JMM

2U

Two

tren

ches

, 10

-12

feet

de

ep,

southwest

of Claremont

fault

(CDM

G, 197Mi)

ing

in Ho

loce

ne al

luvi

um (Qal of

Rogers,

1965

).

No fa

ulti

ng

No fault-

San

Jacinto

5/30/79

Lewis

S. Lo

hrJo

b #7

7-79

-5

One

tren

ch,

aver

agin

g 10

feet de

ep,

acro

ss Casa Loma fault

(CDM

G, 19

80i)

. Fa

ulti

ng,

with

displacements

of up

to 6

inch

es,

in Ho

loce

ne alluvium (Qal of Rogers,

1965

).

Coun

ty

(City)

of

Juri

sd iction

County

(Cit

y)Fi

le

Number

CDMG AP File

Number

7-1/2

Minu

te

Quad

ran

g Ie

( s)

Date

of

Report(s)

(Mo/

da/y

r)

Investigating

Fi rm or

Geologist

Identification Nu

mber

and

Site Description

Where

noCity or

Cou

nty

Numb

er

San

Jaci

nto

Faul

t Zo

ne.

Rive

rsid

e Co

unty

(Figs. 18

an

d 19)

Rive

rsid

e

Riverside

18U

191

1035

Riversid

e

Riversid

e

Rive

rsid

e

192

193

201

1066

1275

1135

Riverside

Riverside

Rive

rsid

e

20U

207

210

1130

1151

1198

San

Jacinto

6/5/

79Le

w is S.

Loh r

Job

#78-

79-6

Five trenches,

maximum

dept

h 1U

feet,

acro

ss Ba

utis

ta Creek

and

unnamed

fault

(CDMG, 1980J).

Faul

ting

in

al

l fi

ve tr

ench

es with displacements

of up to 6.

8 fe

etin Pleistocene

Bautista Fo

rmat

ion

and

Holo

cene

al

luvi

um (Qc

and

QaI

of Rogers,

1965).

El Ca

sco

10/1

/79

Pioneer

Cons

ulta

nts

Job

#3213-007

Thirteen tr

ench

es,

5-13

fe

et de

ep,

acro

ss three

unna

med

faul

ts no

rthe

ast

and

parallel

to San

Jacinto

faul

t (C

DMG,

19

7Um)

. Tr

ench

es 1,5,5a,11:

offsetting in Holocene

allu

vium

(Qal of

Ro

gers

, 1965)

along

fault

2.

Tren

ches

2,

7,10

: offsetting in

Pliocene San

Timoteo

Form

atio

n (P

C of

Rogers,

1965)

and

questionable evidence fo

r offset in

Holocene deposits along

fault

3.

Tren

ches

3,U:

offsetting

in San

Timo

teo

Form

atio

n, no faulting

in Holocene al

luvi

um along

fault

U.

'

San

Jacinto

3/9/

79Le

wis

S. Lohr

Job

#75-79-3

Two

tren

ches

, av

erag

ing

10 feet deep,

nort

heas

t of Casa Lo

ma fault

(CDMG, 19

80i)

. faulting in Pleistocene

"sediments"

(?)

or Ho

loce

ne al

luvi

um (Q

c (?)

and

Qal

of

Roge

rs,

1965

).

No

San

Jacinto

5/10/77

Gary S.

Ra

smus

sen

and

Associates

Project

#1196

Two

tren

ches

, ma

ximu

m de

pth

20 feet,

sout

hwes

t of th

e Casa Lo

ma fault

(CDMG, 19

801)

. No

faulting

in Ho

loce

ne al

luvi

um (Q

al of

Ro

gers

, 19

65).

San

Jaci

nto

5/9/

79GeoSoiIs,

Inc.

W.O.

596-602-00

Twenty-three tr

ench

es an

d pits,

8-15

fe

et deep,

acro

ss San

Jaci

nto

fault

(CDMG, 19

80i)

. Tr

ench

es 3,U,5,8, and

15:

displacement of

al

luvi

al layers ra

ngin

g fr

om 3-

18 inches

in Ho

loce

ne al

luvi

um (Qal of

Rogers,

1965).

Trench 13:

U-6

inches of

displacement

in Ho

loce

ne alluvium.

Hemet

3/1U/80

Lewis

S. Lo

hrJo

b #8

0-80

-3

One

trench,

10-11

feet

deep,

acro

ss Ca

sa Loma fault

(CDM

G, 19

80J)

. Tw

o se

para

te

zone

s of

faulting with 1.

5 feet and

2.8

feet

vertical displacement in Holocene

allu

vium

(Q

al of

Ro

gers

, 19

65).

El Casco

U/25/80

Lewis

S. Lohr

Job

#82-80-U

One

trench,

10 feet de

ep,

acro

ss tr

ace

of Claremont

(?)

fault

(CDMG, 19

7Um)

. No

faulting

in Ho

loce

ne al

luvi

um (Qal of

Ro

gers

, 19

65).

Heme

tU/

21/8

0Gary S.

Rasmussen

and

Associates

Project

#1608

Five tr

ench

es,

10-12

feet deep,

acro

ss and

sout

hwes

t of Lake Street fault

(CDMG, 1980J)

Tren

ches

1A,

1B,

2, 3B

: faulting with vertical of

fset

s of up to

18 inches in

Ho

loce

ne

allu

vium

(Q

al of

Ro

gers

, 19

65).

to

County

County

CDMG

(City)

(City)

AP

7-1/

2 Da

te of

of

File

File

Minu

te

Repo

rt(s

) Ju

risd

icti

on

Number

Number

Quad

rang

le( s )

( Mo/da /yr)

Investigating

Iden

tifi

cati

on Number an

d /

Firm or

Si

te De

scri

ptio

n Wh

ere

no

Geologist

City or C

ount

y Number

San

Jaci

nto

Fault

Zone.

Riversid

e County (F

iqs.

18

and

19)

Riverside

217

1212

San

Jaci

nto

One

tren

ch,

faulting

in

Riversid

e 220

1237

San

Jaci

nto

La kev i ew

6/2/80

Lewi

s S.

maximum

depth

13 feet,

Holo

cene

al

luvi

um (Q

al

U/10/80

Pion

eer

Lohr

Job

#83-80-6

northeast

of Casa Loma fault

(CDM

G, 1980i)

No

of Ro

gers

, 19

65).

Cons

ulta

nts

Job

#339

7-00

1

Rive

rs ide

Rive

rsid

e

Rive

rs ide

Riverside

Riverside

Rive

rsid

e

223

227

228

232

23U

2UO

1227

1308

1251

127U

1300

1315

Three

tren

ches

, 10

-13

feet deep,

acro

ss an

d so

uthwes

t of un

name

d fa

ults

in

San

Jaci

nto

fault

zone

(C

DMG,

19

80i,

19

7UI)

. Tr

ench

1:

faulting

in Ho

loce

ne alluvium

(Qal of Ro

gers

, 1965).

Hemet

8/8/80

Lewi

s S.

Lo

hrJo

b #84-80-9

One

tren

ch,

10 fe

et deep,

sout

hwes

t of

Casa Loma fa

ult

(CDMG, 19

80J)

. Ho

loce

ne al

luvi

um (Qal of

Rogers,

1965).

No fa

ulti

ng in

San

Jaci

nto

U/23

/81

Irvine Soils

Engi

neer

ing,

Inc.

Job

#2023-00

Twel

ve tr

ench

es,

3-11

feet deep,

acro

ss San

Jaci

nto

fault

(CDM

G, 1980i).

in Ho

loce

ne al

luvi

um (Q

al of Rogers,

1965

).No fa

ulti

ng

La kev i ew

9/26/80

Lewi

s S.

Lohr

Job

#85-

80-9

Two

tren

ches

, av

erag

ing

10 feet de

ep,

acro

ss unna

med

faul

ts in

San

Jacinto

faul

t zo

ne

(CDM

G,

197*

il).

Tr

ench

es

1 and

2:

faulting,

with vertical displacements

up to 5

feet

in

Ho

loce

ne alluvium (Q

al of Ro

gers

, 19

65).

Sun

nym

ead

10/2

2/8

0

Lew

is

S.

Lohr

Job

#86-

80-1

0

One

trench,

approximately

10 feet de

ep,

acro

ss San

Jacinto

faul

t (C

DMG,

197**k).

No

faulting in Ho

loce

ne al

luvi

um (Qal of Ro

gers

, 19

65).

El Ca

sco

12/16/80

Lewis

S. Lohr

Job

#8

7-8

0-1

2

Eig

hte

en

trenches,

max

imum

depth

11

fe

et,

acro

ss

San

Jacin

to

an

d

rela

ted

fa

ults

(CD

MG

, 197U

m).

T

renches

1-6

,7-1

7:

fau

ltin

g

in

Holo

cene alluviu

m

(Qal

of

Ro

ge

rs,

1965).

Hem

et12/U

/80

Le

igh

ton

a

nd

A

ssocia

tes

Project

#680899-01

No trenching

in "P

ark

Hill

" fa

ult

zone

(S

an Ja

cint

o fault

of Rogers,

1965).

No

physiographic

or magnetic ev

iden

ce fo

r faulting in Pl

eist

ocen

e Bautista Fo

rmat

ion

(Qt

of Ro

gers

, 1965).

County

Coun

ty

CDMG

(City)

(Cjt

y)

AP

7-1/2

Date of

Investigating

Iden

tifi

cati

on Nu

mber

and

of

File

File

Minu

te

Repo

rt(s

) Firm or

Site Description

Wher

e no

Jurisdiction

Numb

er

Number

Quad rang Ie(s)

(Mo/da/yr)

Geologist

City or

Co

unty

Number

San

Jacinto

Fault

Zone

. Riverside

Coun

ty (F

igs.

18 and

19)

Riverside

251

1368

Hemet

6/18/81

Lewis

S. Lo

hr

Job

#88-81-6

One

trench,

10 fe

et de

ep,

southwest

of C

asa

Loma

fault

(CDMG, 1980J).

No fa

ulti

ng

in Ho

loce

ne alluvium (Qal of

Ro

gers

, 19

65).

Rive

rsid

e 26

6 1469

Hemet

5/20

/82

Lewis

S. Lo

hr

Job

#95-32-05

One

tren

ch,

10 fe

et de

ep,

southwest

of Ca

sa Lo

ma fault

(CDM

G, 1980J).

No fa

ulti

ng

in Ho

loce

ne al

luvi

um (Q

al of Ro

gers

, 19

65).

u>

\

Fig.

20 -

Loc

atio

ns o

f en

gine

erin

g geology

reports

alon

g faults in

San Fernando a

rea

and

Raymond

Hill

fault

by L

os A

ngeles C

ounty

and

City (*

) numbers.

See

Fig.

1 for

location a

nd F

ig.

2 for

explanation

of

symbols.

Ui

.Fig

. 21

-

Lo

catio

ns

of

en

gin

ee

rin

g

geol

ogy

rep

ort

s al

ong

faults

in

San

Fern

ando

ar

ea

by

Los

Ang

eles

C

ount

y an

d C

ity (*

) nu

mbe

rs.

See

Fig

. 20

fo

r lo

cation

and

Fig

. 2

for

exp

lan

atio

n of

sym

­ b

ols

.

Coun

ty

(Cit

y)of

Jurisdiction

County

(Cit

y)Fi le

Number

CDMG AP Fi le

Number

7-1/

2 Mi

nute

Qu

ad rang Ie(s)

Date

of

Report(s)

(Mo/

da/y

r)

Inve

stig

atin

g Fi rm or

Ge

oIog

i st

Identification Number a

ndSite Description

Wher

e no

City o

r County N

umber

San

Fern

ando

Are

a Fa

ults

. Lo

s Angeles

County (F

igs.

20

and

21)

(Los A

ngel

es)

(4)

384

(Los An

gele

s)

(5)

393

(Los

Ang

eles

) (6)

858

(Los

Ang

eles

) (7)

1250

(Los

An

gele

s)

(8)

955

(Los

An

gele

s)

(9)

307

Los An

gele

s (8

0)

1376

San

Fern

ando

6/19/76

John D.

MerriI

Project

#63408

Two

trenches,

8 fe

et de

ep,

acro

ss Sylmar fault

(CDM

G, 1979V).

Trench 1:

faulting

attributable to

February 9

, 1971 ea

rthq

uake

in

old

er a

lluv

ium

(Qos of

Barrows,

et a I.

. 19

74).

San

Fern

ando

10/2

1/76

The

Eart

h Group,

Inc.

W.O. 0P-6021

One

trench,

unspecified

depth, ac

ross

trace

of Sylm

ar f

ault

(C

DMG,

19

79v)

. Lo

ose

sand zo

ne an

d truncation of a

lluv

ial

stratification ci

ted

as e

vidence

for

faulting

in ol

der

alluvial deposits (Q

os of Ba

rrow

s, et

a I..

1974

).

San

Fern

ando

4/7/78

Ralp

h Er

nest

Sm

ith

and

Asso

ciat

es12924

Chippewa St.,

Sy I m

a r

One

tren

ch,

5 feet de

ep,

south

of Sy

lmar

fa

ult

(CDM

G, 1979v).

Faulting,

conf

irme

d by seismic

prof

ile

anal

ysis

, in

"f

ill

material"

(Qaf a

nd Qs

c (?)

of Ba

rrow

s, et

a I.

. 19

74).

San

Fern

ando

1/28

/80

GeoS

oils

, Inc.

Thre

e trenches,

5 fe

et de

ep,

acro

ss Sy

lmar

fault

(CDM

G, 19

79v)

. in

Holocene alluvium (Qsc o

f Barrows, et a I..

1974

).

San

Fern

ando

1/

16/7

9 Fo

unda

tion

En

gine

erin

gCo.,

Inc.

W.O.

01

067-

VN

Tren

ch 1:

faul

ting

Tentative

Tract

No.

36183

Ten

tren

ches

, average

dept

h 5

feet

, across tr

ace

of Sy

lmar

fa

ult

(CDM

G, 19

79v)

. Tr

ench

8:

faul

ting

in

To

wns ley, Pl

co Formation

bedr

ock.

Trenches 4,

10:

sand­

stone

bedr

ock

of Townsley,

Pico

Formation

thru

st over Holocene alluvium (Ttp an

d Qsc

of Barrows, et

a I..

1974

).

San

Fernando

3/1/

71

F. Be

ach

Lelghton

and

Associates,

Inc.

Project

#126

7

Five

borings, 22 to 30

feet de

ep,

and

2 pits 8

feet de

ep,

acro

ss Veterans fa

ult

(CDM

G, 1979v).

Bori

ng 5

and

pit

2:

faul

ting

in

claystone-siItstone

and

terr

ace

gravel be

ds (Tqs a

nd Qo

f of

Barrows, et a I..

1974

).

San

Fern

ando

9/1/81

Geop

lan,

Inc.

Project

J15580,

Tent

ativ

e Pa

rcel

Ma

p 80

75,

12489

N.

Blue

Sa

ge Ro

ad,

Kage

l Canyon

District

Two

trenches,

maxi

mum

dept

h 17

fe

et,

nort

h of

Ka

gel

faul

t (C

DMG,

19

79v)

. No

fa

ulti

ng in Pl

ioce

ne Pi

co Formation, ol

der

alluvium

or

residual so

il (Ttp,

Qoa

and

Qal

of Barrows, et

a I..

1974

).

County

County

CDMG

(City)

(City)

AP

7-1/

2 Da

te of

In

vest

igat

ing

Iden

tifi

cati

on Number and

of

File

File

Minu

te

Repo

rt(s

) Fi

rm or

Si

te Description Where no

Jurisdiction

Number

Number

Quad

rang Ie(s)

(Mo/da/yr)

Geol

ogis

t City or County Number

San

Fernando

Area Fa

ults

. Lo

s An

gele

s County (Figs. 20

an

d 21)

Los

Ange

les

(81)

1322

San

Fernando

3/23/80

Brian

A. Ro

bins

on

J.O.

No.

0336

, 12271

Fore

stan

d Associates,

Inc.

Tr

ail,

Ka

gel

Canyon

Two

tren

ches

, maximum de

pth

8 feet an

d lo

g of

steep

road

cut, north

of Kagel

fault

(CDMG, 19

79v)

. Tr

ench

es 1,2:

no fa

ulti

ng

in Mi

ocene

Mode

Io

Form

atio

n shale

and

conglomerate or

Ho

loce

ne alluvium (T

m an

d QaI

of Ba

rrows, et a I.

. 19

7U).

Road

cut:

No faulting in

Pl

ioce

ne Pico Fo

rmat

ion

sandst

one

or Ho

loce

ne alluvium (Ttp and

Qal

of Barrows, et

a I..

197U).

Los

Ange

les

(82)

11

7U

San

Fern

ando

1/

17/8

0 Ge

opla

n,

Inc.

Pr

ojec

t #8U637,

1200

3 N.

Kage

l Canyon Road,

Lakeview

Terrace

Dist

rict

Five

tr

ench

es,

8-15

fe

et deep,

west of

Lakeview fault

(CDM

G, 19

79v)

. Trench U:

slig

ht fr

actu

ring

, but

no fa

ulti

ng

in Mi

ocen

e Mo

delo Formation.

No fracturing

or faulting in ov

erly

ing

stre

am terrace

depo

sits

or re

sidu

al so

il (T

m, Qt and

Qal

(?)

of Barrows, et a I..

197U).

Los

Ange

les

(86)

- Sa

n Fernando

2/3/

81

Cali

forn

ia Ge

o-

Job

#GS8

0-11

23.

Tentative

Systems,

Inc.

Tr

act

No.

U0605.

Sylm

ar.

Thre

e tr

ench

es,

maximum de

pth

10 feet,

acro

ss trace

of Veterans fa

ult

(CDMG, 1979v).

Tren

ch 3:

faul

ting

an

d fracturing

in lo

wer

Pleistoc

ene

Pacoima

Form

atio

n (?)

and

terr

ace

depo

sits

(TQs an

d Qo

f of

Barrows, et

a I..

197U).

Raym

ond

Hilt Fa

ult.

Lo

s An

gele

s County (F

ig.

20)

Los

Ange

les

(83)

1U

28

Mt.

Wilson

2/18/82

California Ge

o-

Job

# GS82-210.

Proposed

Systems,

Inc.

PM 1U

975,

Ar

cadi

a.

One

tren

ch,

13 fe

et deep,

nort

hwes

t of

Ra

ymon

d Hill fault

(CDM

G, 1977w).

No

faul

ting

in pre-Holocene alluvium (Qc

of Jennings and

Strand,

1969

).

Los

Ange

les

(8U)

1226

Mt.

Wilson

9/17

/80

Bob

Dickey

Job

# 0-176.

Tentative PM

12

913,

Geot

echn

icaI

, In

c.

10UO San

Gabr

iel

Blvd.

Two

trenches,

maximum

depth

7 fe

et,

nort

hwes

t of

Ra

ymon

d Hi

ll fault

(CDM

G, 1977w).

No fa

ulti

ng in alluvium (Qc

of Jennings an

d Strand,

1969

).

Los

Ange

les

(85)

-

Mt.

Wilson

10/9/73

Leig

hton

-Yen

an

d Project

#73220-1.

Tentative

Associates,

Inc.

Tr

act

320U1, San

Marino.

Thre

e trenches,

maximum depth

10 feet,

acro

ss Raym

ond

Hill

fault

(CDM

G, 1977w).

Tren

ches

1,

3:

Frac

turi

ng,

shearing an

d fa

ulti

ng

in older alluvium (Qc

of

Jennings an

d Strand,

1969).

00

Fig

. 22

-

Loca

tions

o

f e

ng

ine

erin

g

geol

ogy

report

s al

ong

Ingl

ewoo

d-N

ewpo

rt f

ault

zone

in

In

g1ew

ood

and

Sea

l Be

ach

area

s by

Lo

s A

ngel

es

Cou

nty,

C

ity (*

),

Hun

tingd

on B

each

(*

*)

and

Sea

l Be

ach

(S)

num

bers

. Se

e F

ig.

1 fo

r lo

catio

n

and

Fig

. 2

for

exp

lanatio

n of

sym

bols

.

vo

.;:; I

ff :

: ---.

-f"

..5- .

>

'i;\^>'.t^

KfW

* i'

-<'/

^V^*

vt

It !

-< r

* «.

;-..- : .» v

Fig. 23 -

Locations of e

ngineering geology

repo

rts

along

faults in In

glew

ood

area b

y In

gle-

wood C

ity

numb

er.

See

Fig. 22

for

location a

nd Fig. 2

for

expl

anat

ion

of s

ymbols

00 o

LF

ig.

24 -

Loca

tions

of

en

gin

ee

rin

g

geol

ogy

rep

ort

s al

ong

Ingl

ewoo

d-N

ewpo

rt fa

ult

zone

by

C

ity of

Long

B

each

an

d S

ignal

Hill

(*)

num

bers

. Se

e F

ig.

22 fo

r lo

cation

and

Fig

. 2

for

exp

lan

atio

n o

f sy

mbo

ls.

00»

'*."

.«

v .--

,

Fig.

25

- L

ocat

ions

of e

ngin

eeri

ng g

eolo

gy re

port

s al

ong

Inglewood-Newport

fault

zone b

y City o

f Hu

ntin

g-

ton

Beac

h nu

mber

. Se

e Fi

g. 22

for

location

and

Fig. 2

for explanation

of s

ymbols.

County

(City)

of

Jurisdlet io

n

Coun

ty

(Cit

y)Fi

le

Number

CDMG AP Fi le

Number

7-1/2

Minu

te

Quadrangle(s)

Date of

Report(s)

(Mo/da/yr)

Investigating

F i r

m or

Geologist

Iden

tifi

cati

on Number and

Site De

scri

ptio

n Wh

ere

noCity or

County Number

Ing Iewood-Newport Fa

ult

Zone.

Los

Angeles

and

Oran

ge Co

unti

es (Figs. 22

-25)

(Los Angeles)

(1)

8UU

(Los

An

gele

s)

(2)

1262

(Los

An

gele

s)

(3)

1206

oo

ro

Los

Ange

les

(76)

Los

Ange

les

(77)

Los

Angeles

(78)

Los

Angeles

(79)

252

U01

Hoil

ywoo

d5/

2/78

John D. Me

rriI

IProject

#843

93

Two

tren

ches

, ma

ximu

m depth

6-1/2

feet,

in In

glew

ood-

Newp

ort

fault

zone

(CDMG,

1976

hh).

Tr

ench

1:

fa

ulti

ng in "e

arly

Pleistocene

Ing Iewood Formation",

but

no faulting in

ov

erly

ing

"Hol

ocen

e soil profile" (P

u of Je

nnin

gs and

Strand,

1969

).

Ho I Iywood

1/5/81

WiI Iiam R. Munson

4000 Don

AI eg re Pl

ace,

BaIdw

i n Hills

One

trench,

6.2

feet deep,

acro

ss trace

of In

glew

ood-

Newp

ort

fault

(CDMG> 1976hh)

Normal faulting with .5 to

2.

0 fe

et displacement in Te

rtia

ry-e

arly

Qu

ater

nary

"A Fo

rmat

ion"

bedrock, but

no faulting in

Ho

loce

ne sl

opew

ash

depo

sits

(Pu

of

Jenn

ings

an

d St

rand

, 19

69).

Hoil

ywoo

d5/

7/80

Thom

as Cl

emen

ts

Associates

Job

#3-80-112

Two

trenches,

5 feet deep,

across trace

of In

glew

ood-

Newp

ort

fault

(CDMG, 1976hh).

Tren

ches

1,2:

"cra

ckin

g or

fa

ulti

ng"

repo

rted

, but

no lithological de

scri

ptio

n or

fo

rmat

ion

name given.

(Qm

(?)

of Jennings an

d St

rand

, 19

69).

Hoil

ywoo

dU/

23/7

9HR

C Ge

otec

hnic

al

Consultants,

Inc.

Tentative

Trac

t #33172.

St.

near

Valley Ridge.

Sto

cker

Two

tre

nch

es

an

d

26

test

pits,

max

imum

depth

15

fe

et,

acro

ss

Ing

lew

oo

d-N

ew

po

rt fa

ult

(CD

MG

, 1

97

6h

h).

T

rench

T-1

3

an

d te

st

pits

T-8

, T

-9:

"sh

ea

red

and

inte

nsely

fr

actu

red

fa

ult

zone conta

inin

g

man

y so

il-f

ille

d cra

cks,

ca

lca

reo

us fille

d

fractu

res,

and fa

ult

bre

ccia

" in

P

leis

toce

ne

S

an

Pedro

F

orm

ation

be

dro

ck

(Qm

o

f Je

nn

ing

s

an

d

Str

an

d,

19

69

).

IngIe

wood

5/1

5/7

0G

lenn

A.

Bro

wn

and

Asso

cia

tes

Pro

ject

#6

91

38

-A.

2863U

, C

ars

on

.

One

tr

ench,

12 fe

et

deep,

acro

ss

Avalo

n-C

om

pto

n fa

ult

(CD

MG

, 1976M

).

Ho

loce

ne

a

llu

viu

m

(Qal

of

Je

nn

ing

s,

19

62

).

Tract

No,

No fa

ulti

ng in

Long Be

ach

3/23

/76

Pacific

Soils

Engi

neer

ing,

In

c.W.O. #2

0063

7.

Caro

l Ca

ble

Bldg.,

2665 Del

Amo

Blvd.

Thre

e tr

ench

es,

maximum

dept

h 11

feet,

sout

hwes

t of

Ch

erry

Hi

ll fault

(CDMG, 1976gg).

No faulting in

Ho

loce

ne al

luvi

um (Q

al of Jennings,

1962).

Long

Be

ach

2/10

/77

LeRoy

Cran

da I

I and

Associates

Job

#E-7702U.

Vici

nity

of

Domi

ngue

z St

. and

Long Beach

Free

way.

No tr

ench

ing

acro

ss Ch

erry

Hi

ll fault

(CDM

G, 1976gg).

Subs

urfa

ce se

ctio

n ac

ross

pro­

jected trace

of fault

constructed

from

lo

gs of

ex

plor

atio

n bo

ring

s dr

ille

d by

firm in

19

67.

Sand

y layers

in bo

ring

s appear to

be

co

ntin

uous

ac

ross

pr

ojec

ted

trace

of fault

indicating that Holocene de

posi

ts to a de

pth

of at least

UO feet ha

ve not

been di

s­

rupted.

(Qal

of

Jennings,

1962).

County

(City)

of

Juri

sdic

tion

County

(Cit

y)Fi

leNumber

CDMG AP Fi l

eNumber

7-1/2

Minu

te

Quad

rang

le(

s)

Date

of

Report(s)

(Mo/da/yr)

Invest igat in

g F

i rm

or

Geol

ogi st

Iden

tifi

cati

on Number and

Site De

scri

ptio

n Wh

ere

noCity o

r County Number

oo

Ing Ie

wood

-New

port

Fault

Zone

. Lo

s Angeles

and

Oran

ge Counties (F

igs.

22-25)

IngIewood

IngIewood

IngIewood

IngIewood

IngI

ewoo

d

IngI

ewoo

d

(1)

1285

(2)

1224

(3)

1117

1122

(5)

1202

(6)

1203

IngI

ewoo

d12/22/80

C. Michael Sc

ull

inProject #80168.

Southerly 65 ft.

of lot

246,

tentative Tract No.

401633, 924 Enterprise Avenue.

One

tren

ch,

maximum depth 9

feet,

west of segment of In

g Iewood-Newport fault (C

DMG,

19

76!i

).

No faulting

in colluvium or upper Pleistocene coastal plain deposits of

Lakewood Formation (Q

al and

Qt of

Jennings, 1962).

IngI

ewoo

d9/

4/79

Geo.

Systems,

Inc.

Job

#G59-307.

Proposed Co

ndo­

minium Co

mple

x, 744-748

N. Eu

ca­

lyptus Avenue.

One

tren

ch,

4 1/2

to 11

feet deep,

west of

Ing Iewo

od-N

ewpo

rt fault

(CDMG, 1976H).

No faulting in al

luvi

um or

underlying be

droc

k (Q

al and

Qt of Je

nnin

gs,

1962

).

IngI

ewoo

d1/10/80

Harl

ey Tu

cker

, Inc.

Project

#384

-79.

Lot

690,

Tract

1453

, 323

East

Pl

ymou

th

St.

One

tren

ch,

maximum

dept

h 6

1/2

feet,

east

of

segmen

t of

In

g Ie

wood

-New

port

fault

(CDM

G, 19

761i

).

No fa

ulti

ng

in up

per

Pleistocene

Lake

wood

Fo

rmat

ion

(Qt

of Je

nnin

gs,

1962

).

IngI

ewoo

d3/

7/80

Lockwood-Singh

and

Asso

ciat

esPr

ojec

t Ref. #1759-92.

Proposed

Eleven-unit

Cond

omin

ium,

lo

t 63

, Tr

act

4242

, 53

0-54

0 Hazel

St.

Two

trenches,

6 fe

et deep,

east of

segment

of In

g I ewo

od-N

ewpo

rt fault

(CDMG, 1976M).

Tren

ches

1,

2:

No fa

ulti

ng

in te

rrac

e deposits (Q

t of Jennings,

1962).

IngI

ewoo

d4/

21/8

0Lockwood-Singh

and

Asso

ciat

esProject

Ref. #1727-92.

Prop

osed

Ei

ght-

unit

Co

ndom

iniu

m lo

t 61

5,

Trac

t 14

53,

Book

20

, 41

5 Exton

Ave.

Thre

e tr

ench

es,

maximum

dept

h 7

1/2

feet,

betw

een

segm

ents

of

In

g Ie

wood

-New

port

fa

ult

(CDM

G, 19768i).

Tren

ches

1-3:

No fa

ulti

ng

in terrace

depo

sits

(Q

t of Je

nnin

gs,

1962

).

IngI

ewoo

d8/18/80

Lockwood-Singh

and

Asso

ciat

esProject

Ref. #2092-02.

Proposed

20-unit

Condominium, 52

9 Ma

rket

St

.

Five

tr

ench

es,

maximum

depth

8 feet,

east

of

se

gmen

t of

In

g Ie

wood

-New

port

fault

(CDMG,

1976

81).

Tr

ench

es 2-

5:

No fa

ulti

ng

in Pleistocene

terr

ace

deposits (Q

t of Jennings,

1962

).

County

(City)

of

Juri

sd ict ion

Coun

ty

(City)

Fi le

Number

CDMG

AP

Fi

le

Numb

er

Inql

ewo

od- Newport

Fault

Zone

.

7-1/

2 Mi

nute

Qu

ad ran

g le

|

Los

Ange

les

Is) and

Date

of

Re

port

( s)

(Mo/da/yr)

Investigating

F i r

m or

Ge

olog

i st

Iden

tifi

cati

on Nu

mber

and

Site

De

scri

ptio

n Wh

ere

no

City or Co

unty

Number

Oran

ge Co

unti

es (F

igs.

22

-25)

IngI

ewoo

d

IngIewood

(8)

(9)

1193

Thom

as Cl

emen

ts

Asso

ciat

es and

Base

line

Co

nsul

tant

s,

Inc.

Project

#8-80-123.

Port

ion

of

lot

3, Tr

act

511, property at

the

sout

heas

t corner of Iv

y Av

e.

and

Beach

Avenue.

Thre

e tr

ench

es,

5 fe

et deep,

across segment

of In

g Ie

wood

-New

port

fault

(CDM

G, 19761i).

Tren

ches

1-3:

No faulting in

fill material.

IngI

ewoo

d10/28/80

Base

line

Consultants,

Inc.

Project

#670-100.

Appl

ebee

pr

o­

ject,

240

Ivy

Avenue.

Two

tren

ches

, ma

ximu

m de

pth

11 feet,

across segment

of In

g Ie

wood

-New

port

fa

ult

(CDMG,

1976

1i).

Tr

ench

es 1,2:

No faulting in Pleistocene

sand deposits (Q

t of Jennings,

1962

)

IngI

ewoo

d6/30/80

Harl

ey Tu

cker

, In

c.Project

#519

-80.

Lot

3, bl

ock

207,

Tract

No.

697,

223

Ing Iewood Av

e.

00JS

IngIewood

IngIewood

IngIewood

IngIewood

(10)

(11)

1190

1129

(12)

1201

(13)

Two

tren

ches

, 5

feet de

ep,

sout

heas

t of

Ce

ntin

ela

fault

(CDM

G, 19

76ii

).

Trenches 1,2:

No faulting in

up

per

Pleistocene

Lakewood Formation

(Qt

of Je

nnin

gs,

1962).

IngIewood

U/15/80

Geosoils,

Inc.

W,0.

1179-VN.

Prop

osed

22

-uni

t Condominium, 340

West Regent St

.

Two

tren

ches

, maximum

depth

U feet,

sout

heas

t of

se

gmen

t of

In

g Ie

wood

-New

port

fa

ult

(CDM

G, 19761i).

Tren

ches

1,2:

No faulting

in "o

lder

al

luvi

um"

(Qt

of Jennings,

1962)

IngI

ewoo

d2/

21/7

9LeRoy

Cran

da I

I and

Associates

Job

#AE-

78UO

O.

Prop

osed

Clinic

Bldg.

and

Parking

Stru

ctur

e,

La Br

ea Avenue and

Quee

n St

.

One

trench,

10 fe

et deep,

east

of

segment

of Ing Ie

wcod

-New

port

fault

(CDM

G, 197611).

No fa

ulti

ng

in up

per

Pleistocene

Lakewood Fo

rmat

ion

(Qt

of Jennings,

1962

).

IngI

ewoo

d3/

2/77

LeRo

y Cr

anda

I I

and

Associates

Job

#AE-

7610

3.

Proposed Medical

Office Bldg., Prairie

Avenue and

HowI and Drive.

Six

borings, 45 to 60

feet de

ep,

south

of In

glew

ood

Park Cemetery fa

ult

(CDMG, 19761

i),

"Soi

ls en

coun

tere

d sh

ow un

ifor

m st

rati

fica

tion

wit

h no ap

pare

nt discontinuities

or

offsets"

in up

per

Pleistocene

Lakewood Fo

rmat

ion

and

lower

Pleistocene

San

Pedro

Forma­

tion

(Q

t an

d Qm

of

Jennings,

1962).

IngI

ewoo

d11

/17/

79

Baseline Co

nsul

tant

s,

Inc.

Proj

ect

#439-119.

Kels

o St

. Pr

oper

ty,

122

Kelso

St.

One

tren

ch,

maximum

dept

h 7

1/2

feet

, west of segment

of In

g Ie

wood

-New

port

fault

(CDM

G, 19

76!i

).

No faulting in Quaternary terrace

depo

sits

(Qt

of Jennings,

1962).

Coun

ty

(Cit

y)of

Jurisdiction

County

(City)

Fi le

Number

CDMG

AP Fi le

Number

7-1/

2 Mi

nute

Qu

ad ran

gle(

s)

Date

of

Report( s)

(Mo/da/yr)

Inve

stig

atin

g Fi rm or

Geol

og i st

Identification Number and

Site Description Where no

City or

County Number

oo

Ing Ie

wood

-New

port

Fault

Zone.

Los

Ange

les

and

Oran

ge Co

unti

es (Figs. 22

-251

IngIewoo

d12

23

IngIewood

(15)

IngI

ewoo

d(1

6)11

45

Long Be

ach

(1276

Long

Be

ach

Long

Beac

h

(2)

(3)

277

IngI

ewoo

d7/

21/8

0 Hu Associates

Project

#HA-1070-U.

Proposed

condominium co

mple

x, 7U1

Nutwood

St.

One

tren

ch,

7 fe

et deep,

sout

hwes

t of

se

gmen

t of In

gIew

ood-

Newp

ort

fault

(CDM

G, 1976M)

No fa

ulti

ng in

Pl

eist

ocen

e terrace

deposits (Qt

of Jennings,

1962).

IngI

ewoo

d1/27/80

C. Michael

Scull

inPr

ojec

t #8

0108

. Century Bl

vd.

3UOO

to 35

00

One

tren

ch,

maximum depth

8 fe

et,

northeast of

segm

ent

of In

g Ie

wood

-New

port

fault

(CDMG, 1976H).

No fa

ulti

ng in

upper Pl

eist

ocene

coastal

plai

n deposits of Lakewood

Form

atio

n (Qt

of Je

nnin

gs,

1962).

IngI

ewoo

d2/

11/8

0 Tr

iad

Foundation

Engi

neer

ing,

In

c.Job

#80-

30.

Proposed Commer­

cial

Bldg., 32

U9 West Century

Blvd.

One

tren

ch,

6 to 7

feet deep,

southwest

of se

gment

of In

g Iewood-Newport fault

(CDM

G,

1976

1i).

No faulting in

"soil

depo

sits

" (Qt

of Je

nnin

gs,

1962

).

Long Beach

7/20

/76

C. Michael

SculI

inPr

ojec

t #G

7616

0.

Lots

24 and

25,

Vist

a Del

Mar Tr

act,

335U

and

336*4

Pine Av

enue

, Long

Beach.

One

trench,

maximum depth

11 feet,

nort

heas

t of

Cherry Hi

ll fa

ult

(CDMG, 1976gg).

No fa

ulti

ng

in upper Pleistocene

terr

ace

deposits of Lakewood Formation

(Qt

of Je

nnin

gs,

1962).

Long Beach

7/21

/76

Evans, Goffman

and

McCormick

Job

#76-85.

Lot

3U and

portion

of lot

33,

Trac

t 2901,

Long

Beach.

Two

tren

ches

, maximum de

pth

9 feet,

northeast

of Cherry Hi

ll fault

(CDM

G, 1976gg).

No

faul

ting

in Pleistocene

terrace

deposits (Qt

of Jennings,

1962).

Long Be

ach

3/13/78

Bob

Dickey

Proposed re

side

ntia

l subdivision,

Geot

echn

ical

In

c.

lots

1

to 16 of

block B

and

lots

U,6

to 9,

and

18 of block

C,

Trac

t No.

2901

(M

.B.

36-63),

on

Elm

Avenue and

Pasa

dena

Avenue

between Ward low and

33rd Sts.,

Long

Be

ach.

One

trench,

maximum depth

8 fe

et,

northeast of

Cherry Hi

ll fault

(CDM

G, 1976gg).

No

faulting

in up

per

Pleistocene

sand

s (Qt

of Je

nnings,

1962

).

County

(Cit

y)of

Jurisdiction

County

(City)

Fi le

Numb

er

CDMG AP File

Numb

er

7-1/

2 Minute

Quad

ran

gle(

s)

Date

of

Repo

rt( s)

(Mo/

da/y

r)

Investigating

Fi rm or

Geologist

Iden

tifi

cati

on Number and

Site

De

scri

ptio

n Where

noCity or County Number

oo

Ingl

ewoo

d-Newport

Faul

t Zo

ne.

Los

Ange

les

and

Oran

ge Co

unti

es (F

igs.

22

-23)

Long Beach

Long Be

ach

Long Beach

Long Beach

Long Be

ach

Long Beach

(U)

723

(5)

(6)

(7)

707

(8)

(9)

Long

Beach

U/1U/78

Acti

on Engineering

Cons

ulta

nts

W.O.

13

8901

. Tract

35131, NW

corner of Atlantic Avenue and

31st St., Long Beach.

One

tren

ch,

maxi

mum

depth

6 fe

et,

nort

heas

t of

Cherry Hill fault

(CDMG, 1976gg).

No

faulting

in Pleistocene

terrace

depo

sits

(Qm

and

Qt of Je

nnin

gs,

1962).

Long Beach

2/21

/77

Evans, Go

ffma

n and

McCo

rmic

kJo

b #76-OU.

Significance of

Alquist-Priolo Special

Stud

ies

Zone

within

Signal Hill.

Two

tren

ches

, ma

ximu

m depth

11 fe

et,

acro

ss Cherry Hill fault

(CDMG, 1976gg).

Tren

ches

1,2:

No faulting in ol

der

allu

vium

or

"H

oloc

ene

allu

vium

and

coll

uviu

m" (Qm

and

Qt of Jennings,

1962

).

Long Be

ach

5/6/

77De

nni s

R. Al

len

South

1/U, lots U

and

5, Crescent

Heig

hts

Tract, Signal Hill.

Thre

e tr

ench

es,

8 feet deep,

acro

ss Cherry Hi

ll fault

(CDM

G, 1976gg). Tr

ench

es 1-

3:

No fa

ulti

ng

in upper

Pleistocene

terrace

depo

sits

of Lakewood Fo

rmat

ion

(Qt

of

Jennings,

1962

).

Long Beach

8/2U/77

John D.

Me

rriI

IPr

ojec

t #7

U021

. U+

Acre Pa

rcel

, NW

corner,

Term

ino

Avenue and

Pacific

Coas

t Hi

ghwa

y, Long

Beach.

One

trench,

maxi

mum

depth

21 feet,

acro

ss Reservoir

Hill fault

(CDMG, 1976gg).

Fault­

ing

in Pleistocene

San

Pedr

o Fo

rmat

ion,

but

no faulting

in ov

erly

ing

Holocene de

posi

ts

(Qt

and

QaI

(?)

of Jennings,

1962

).

Long Be

ach

10/29/75

LeRoy

Cran

da I

I and

Asso

ciat

esJo

b #E-75197.

Proposed Ci

nema

Complex

betw

een

Paci

fic

Coast

High

way,

Te

rmin

o Avenue,

Mendez

St., and

Outer

Circ

le,

Long Be

ach,

Two

trenches,

maximum

depth

10 feet,

acro

ss the

Rese

rvoi

r Hi

ll fault

(CDMG, 1976gg).

Tren

ches

1,

2:

No faulting

in up

per

Pleistocene

terr

ace

depo

sits

(Q

t of

Je

nnin

gs,

1962

).

Long Beach

3/10/77

C. Michael

Scul

l in

Project

#771

26.

Parcel 2,

PM

8002,

Hath

away

Avenue and

Outer

Circ

le Drive, Long Beach.

One

tren

ch,

maximum

dept

h 6

feet,

nort

heas

t of Reservoir

Hill

-Sea

l Be

ach

faul

t (CDMG,

1976

gg).

No fa

ulti

ng

in up

per

Pleistocene

terrac

e deposits of

La

kewo

od Fo

rmat

ion

(Qt

of Jennings,

1962).

Coun

ty

(City)

of

Jurisdiction

County

(City)

File

Number

CDMG AP Fi l

eNumber

7-1/

2 Mi

nute

Qu

adra

ngle

(s)

Date

of

Re

port

( s)

(Mo/

da/y

r)

Investigating

Fi rm

or

Geologist

Iden

tifi

cati

on Number an

dSite De

scri

ptio

n Where

noCity or

County Number

03

Ing Ie

wood

-New

port

Fault

Zone

. Lo

s Angeles

and

Oran

ge Co

unti

es (F

igs.

22-23)

Long Beach

(10)

U19

Long Beach

(11)

589

Long

Beach

(12)

252

Long Be

ach

(13)

195

Long

Beach

(1U)

326

Long Beach

(15)

389

Long Be

ach

3/10/77

C. Mi

chae

l SculI

inPr

ojec

t #77127.

Parcel U, PM

8002,

between

Lake

wood

Blvd.

and

Outer

Traf

fic

Circ

le Drive,

Long Beach.

Two

tren

ches

, maximum

dept

h 7

feet,

nort

heas

t of the

Reservoir

Hill-Seal

Beac

h fa

ult

(CDM

G, 19

76gg

).

Trenches 1,

2:

No faulting in

up

per

Pleistocene

terr

ace

deposits of

Lakewood Fo

rmat

ion

(Qt

of Jennings,

1962

).

Long

Be

ach

6/2/

77Ev

ans,

Goffman

and

McCormick

Job

#77-

71.

Southwest

corner.

Paci

fic

Coas

t Highway

and

Obispo

St., Long Beach.

Two

trenches,

maximum

dept

h 15

fe

et,

sout

hwes

t of

Cherry Hi

ll fa

ult

(CDMG, 1976gg).

No faulting in

"pre-Holocene

older

allu

vium

" (Qt

of Je

nnin

gs,

1962

).Trenches 1,2:

Long Be

ach

Two

tren

ches

, Tr

ench

es 1,

2:

Long Beach

3/23

/76

C. Mi

chae

l SculI

inPr

ojec

t #G76123.

Lot

9, Cerritos

Heig

hts

Tract, 1725 Loma Avenue

and

1720 Ne

wpor

t Avenue,

Long

Beach.

maxi

mum

dept

h 6

feet

, south

of Northeast

Flan

k fault

(CDMG, 1976gg).

No faulting in

terrace

deposits (Qt

of Jennings,

1962).

3/30

/76

C. Michael

SculI

inProject

#G76

112A

. Lots 7

and

9,

Alien

and

Rheas

Signal Hi

ll

Tract, 36

30-3

6U2

Wilton St.,

Long Beach.

One

tren

ch,

maximum

depth

7 fe

et,

sout

h of

Northe

ast

Flank

fault

(CDMG, 19

76gg

).

No

faulting in terrace

deposits (Q

t of

Jennings,

1962).

Long Beach

7/28

/76

C. Michael

SculI

inProject

#G76

162.

Lots 29 and

30,

Bonn

ie Br

ae Tract, 3506 and

3512

Wilton St., Long Beach.

One

tren

ch,

maxi

mum

depth

7 1/

2 fe

et,

south

of Cherry Hill fault

(CDMG, 19

76gg

).

No

faul

ting

in up

per

Pleistocene

terr

ace

depo

sits

of La

kewo

od Fo

rmat

ion

(Qt

of Jennings,

1962).

Long Beach

11/8

/76

C. Mi

chae

l SculI

inProject

#G76202.

Lot

5, 36

26

Paci

fic

Coas

t Hi

ghwa

y, westerly

1/2

of lo

t 6, 37

20 Pacific

Coas

t Highway, Overlook Park Track,

Long

Beach.

One

tren

ch,

maximum

depth

9 feet,

sout

hwes

t of

Reservoir

Hill

-Sea

l Beach

fault

(CDMG,

1976gg).

No faulting in

upper

Pleistocene

terr

ace

depo

sits

of La

kewo

od Fo

rmat

ion

(Qt

of Jennings,

1962

).

County

(City)

of

Juri

sdic

tion

County

(City)

Fi le

Number

CDMG AP Fi le

Numb

er

7-1/

2 Mi

nute

Qu

adra

ngle

( s)

Date

of

Report(s)

(Mo/da/yr)

Investigat ing

Fi rm or

Ge

olog

i st

Iden

tifi

cati

on Nu

mber

and

Site Description

Wher

e no

City or

County Nu

mber

oo

oo

Ingl

ewoo

d-Ne

wpor

t Fault

Zone

t Lo

s An

gele

s an

d Or

ange

Cou

ntie

s (F

igs.

22-25)

Long Beac

h (16)

378

Long Beac

h (17)

Long Beac

h (18)

Long Beac

h (1

9)327

Long Be

ach

(20)

552

Long

Beac

h (21)

Long

Be

ach

(22)

50U

6114

Long

Beach

3/23

/76

C. Michael

Scul

l in

Project

#G76

126.

No

rth

1/U

of Farm lot

38,

Alamitos Tr

act,

17UO

Gr

and

Aven

ue,

Long Be

ach.

One

trench,

maximum

depth

7 fe

et,

south

of trace

of Northeast

Flan

k fault

(CDM

G,

1976

gg).

No fa

ulti

ng

in upper

Pleistocene

terrace

deposits of La

kewo

od Fo

rmat

ion

(Qt

of J

ennings, 19

62).

Long

Beach

7/16/81

Kenneth

G. Osborne

and

Associates

Job

#3327-1.

Comm

unit

y Pr

ofes

­ si

onal

Bl

dg.,

Pacific

Coas

t Hwy.

and

Termino

Avenue,

Long Be

ach.

One

trench,

maxi

mum

dept

h 10

fe

et,

southwest

of Reservoir

Hill fault

(CDM

G, 1976gg).

No fa

ulti

ng in

pr

e-Ho

loce

ne "s

lope

was

h" (Q

t of

Jennings,

1962).

Long

Beach

2/26

/76

C. Michael

Scul

I in

Project

#676

115.

Lo

t 9,

Tr

act

6399

, 13

U9 Be

nnet

t, Lo

ng Be

ach.

One

trench,

6 feet de

ep,

southwest

of Se

al Be

ach

faul

t (C

DMG,

19

76gg

).

No fa

ulti

ng

in terrace

deposits (Q

t of

Jen

ning

s, 19

62).

Long

Beach

9/15/76

C. Michael

Scul

I in

Project

#G76

177.

Lot

25,

Trac

t 63

59,

1356

Ximeno A

venue, Long

Beac

h.

One

trench,

6 fe

et de

ep,

sout

hwes

t of

Reservoir

Hill-Seal

Beac

h fa

ult

(CDM

G, 1976gg).

No faulting

in up

per

Pleistocene

terrace

deposits of

La

kewo

od Formation

(Qt

of Jennings,

1962

).

Long Be

ach

8/11

/77

C. Michael

Scul

I in

Project

#771

82.

«i51

5 E.

Anaheim

St., Lo

ng Beach.

One

trench,

maximum

dept

h 7

feet

, so

uthw

est

of th

e Reservoir

Hill

-Sea

l Be

ach

fault

(CDM

G, 19

76gg

).

No fa

ulti

ng in

up

per

Pleistocene

terr

ace

depo

sits

of

Lakewood Forma­

tion (Q

t of

Jen

ning

s, 1962).,

Long Beach

6/21

/77

A. A.

Carrey

Lot

No.

3, Tract

No.

U32«4, Long

Beach.

One

trench,

8 to 10

fe

et de

ep,

southwest

of Se

al Be

ach

faul

t (C

DMG,

19

76gg

).

No

faul

ting

in

Pleistocene

San

Pedro

Formation

(Qt

of J

ennings, 1962).

Long

Be

ach

1/11/78

C. Michael

Scul

I in

Project

#78102.

Portion

of Farm

lot

62,

Alamitos Tr

act,

U729 E.

Anaheim

St., Lo

ng Be

ach

One

trench,

maximum

depth

7 fe

et,

southwest

of Seal Beach

fault

(CDM

G, 19

76gg

).

No

faul

ting

in up

per

Pleistocene

terrace

deposits of La

kewo

od Fo

rmat

ion

(Qt

of J

enni

ngs,

19

62).

County

(City)

ofJu

risd

icti

on

County

(City)

File

Number

CDMG

AP Fi le

Number

7-1/

2Mi

nute

Quad

ra ngl

e( s)

Date

of

Repo

rt ( s)

(Mo/

da/y

r)

Inve

st igat ing

F i r

m or

Geol

og i st

Identification Number a

ndSite Description

Wher

e no

City o

r County Number

Inqlewoo

d-Newport

Fault

Zone

. Los

Angeles

and

Orange Counties (Figs. 22

-25)

Sign

al Hill

(1)

Signal Hill

(2)

Sign

al Hill

(3)

oo

vo

Sign

al Hi

I I

Sign

al Hill

(5)

Sign

al Hill

(6)

Long Beach

1/28/79

C. Mi

chae

l Scull

inProject

#791

06.

Lots

1-

U8,

block

1, lo

ts 7-2U,

31-U

8,

block

2, Windermere tr

act,

southeasterly of Atlantic Ave,

and

Spring St.

Eight

tren

ches

, maximum de

pth

13 feet,

acro

ss Cherry Hi

ll fa

ult

(CDM

G, 1976gg).

Trenches 1,2,6:

join

ting

, shearing an

d calcite

fill

ed fr

actu

res,

but

no

faul

ting

, in Palos

Verdes sand or

the

uppe

r Pl

eist

ocen

e terrace

deposits

of Lakewood Fo

rmat

ion

(Qt

of Je

nnin

gs,

1962).

Long

Beach

11/1

2/80

Le

Roy

Cran

dalI

an

d Associates

Job #AE-80322

Two

trenches,

maximum depth

9 fe

et,

southwest

of Cherry Hi

ll fault

(CDM

G, 1976gg)

Trenches 1-

2:

No fa

ulti

ng in upper

Pleistocene

terr

ace

deposits of Lakewood

Form

atio

n (Qt

of Je

nnin

gs,

1962).

Long Be

ach

U/1/

79C.

Michael

SculI

inProject

#791

22.

Lots 1-

8,

American Colony Tr

act,

2800

Atla

ntic

Avenue.

One

trench,

6 feet de

ep,

sout

hwes

t of

Cherry Hi

ll fault

(CDM

G, 1976gg).

No

faul

ting

in up

per

Pleistocene

terrace

deposits of

Lakewood Formation

(Qt

of

Jenn

ings

, 1962).

Long Be

ach

8/17

/79

C. Mi

chae

l SculI

inPr

ojec

t #7

9158

.26

99 California Avenue,

One

trench,

6 1/2

feet deep,

sout

hwes

t of

Cherry Hi

ll fa

ult

(CDMG, 1976gg).

No

faulting in up

per

Pleistocene

terr

ace

deposits of Lakewood Formation

(Qt

of

Jenn

ings

, 1962).

Long Be

ach

5/11

/79

C. Michael

SculI

inPr

ojec

t #7

9131

. Southerly lot

38,

lot

UO,

northerly 1/2

lot

U2,

Burn

ett

Vill

a Tract,

1100 Willow Avenue.

One

trench,

7 fe

et deep,

sout

hwes

t of

Cherry Hill fault

(CDMG, 19

76gg

).

No

faul

ting

in

up

per

Plei

stoc

ene

Lake

wood

Fo

rmat

ion

(Qt

of Jennings,

1962).

Long Be

ach

1/9/81

Kenneth

G. Os

born

e an

d Associates

Job

#2663-11.

Indu

stri

al Bl

dg

Site,

westerly si

de of

Gundry

Avenue between

WiI low

and

27th

Sts,

One

tren

ch,

maximum depth

13 fe

et,

nort

heas

t of

Cherry Hi

ll fault

(CDMG, 1976gg).

No fa

ulti

ng in br

own

sandy

silt

s or

or

ange

br

own

sand

s (Qt

of Jennings,

1962

).

Coun

ty

(City)

of

Juri

sdic

tion

Coun

ty(City)

Fi le

Number

CDMG AP Fi le

Numb

er

7-1/2

Minu

te

Quad ran

gle(

s)

Date

of

Repo

rt(s

)(Mo/da/yr)

Investigating

Fi rm

or

Geologist

Iden

tifi

cati

on Number a

ndSite Description

Wher

e no

City o

r County N

umber

vo

o

Ing Iewood-Newport Fault

Zone

. Los

Ange

les

and

Oran

ge Counties (F

igs.

22-25)

Signal Hi

ll

(7)

Signal Hi

I I

(8)

Signal Hill

(9)

Sign

al Hill

(10)

Signal Hi

ll

(11)

Long

Be

ach"

6/25

/79

C. Michael

Scul

I in

Project

#79141.

1400 W

illow

St.

sout

heas

terl

y corner

Willow St

. and

Gundry A

venu

e

One

tren

ch,

maxi

mum

dept

h 7

feet

, no

rthe

ast

of Cherry Hill fault

(CDMG, 1976gg).

No fa

ulti

ng in

up

per

Pleistocene

terrace

depo

sits

of

Lakewood Fo

rmat

ion

(Qt

of J

enni

ngs,

19

62).

Long Be

ach

6/1/

78Ba

seli

ne Co

nsul

tant

s,

Inc.

Project

#99-058.

Sout

hwes

t corner o

f Willow St

. and

Waln

ut Avenue.

Thre

e trenches,

maximum

dept

h 10 fe

et,

northeast

of Cherry H

ill

faul

t (C

DMG,

1976gg).

Tren

ches

1-3:

No fa

ulti

ng

in up

per

Plei

stoc

ene

terrace

deposits (Q

t of

Jennings,

1962

).

Long Beach

7/14/78

Base

line

Consultants

Project

#137-078.

Gill

pr

oper

ty,

Cherry A

venu

e and

25th St.

One

tren

ch,

8 to 17

fe

et d

eep,

northeast

of Cherry H

ill

fault

(CDM

G, 1976gg).

No faulting in up

per

Plei

stoc

ene

terrace

depo

sits

(Q

t of

Jennings, 19

62).

Long

Be

ach

6/16

/78

H. V. La

wmas

ter

and

Co.,

Inc.

File No

. 58

4G.

Proposed

apar

tmen

t complex, south­

easterly o

f in

ters

ecti

on of

Burnett

St.

and

Gavi

ota

Ave.

Two

trenches,

maximum

dept

h 20 1/2

feet

, ac

ross Cherry Hi

ll fault

(CDM

G, 1976gg).

No faulting in

up

per

Plei

stoc

ene

terrace

deposits and

Palos

Verd

e sa

nd of

La

kewo

od Fo

rmat

ion

(Qt

of J

enni

ngs,

19

62).

Long

Be

ach

1/31/80

Base

line

Co

nsul

tant

s,

Inc.

Project

#468

-010

. Wong

Prop

erty

, 25

42 Brayton

Aven

ue.

Signal Hill

(12)

One

tren

ch,

8 fe

et de

ep,

southwest

of Ch

erry

Hill fault

(CDM

G, 1976gg).

No

faulting in

up

per

Plei

stoc

ene

terrace

deposits (Q

t of J

ennings, 1962).

Long

Beach

1/25/78

C. Michael

Scul

I in

Proj

ect

#78105.

Portion

of

lot

102, American Colony T

ract,

2286

Ga

viot

a Av

enue

.

One

tren

ch,

6 1/

2 feet de

ep,

southwest

of Cherry H

ill

fault

(CDM

G, 1976gg).

No fa

ulti

ng in

up

per

Pleistocene

terrace

depo

sits

of La

kewo

od Fo

rmat

ion

(Qt

of Jennings,

1962

).

County

(City)

of

Jurisdiction

County

(City)

Fi le

Number

CDMG AP File

Numb

er

7-1/

2 Mi

nute

Qu

ad rangle(s)

Date

of

Report(s)

(Mo/

da/y

r)

Invest igating

Fi rm

or

Geologist

Iden

tifi

cati

on Number and

Site Description

Wher

e no

City or County Number

Ing Ie

wood

-New

port

Fault

Zone

. Lo

s Angeles

and

Oran

ge Co

unti

es (Figs. 22

-25)

Signal Hi

ll

(13)

Signal Hi

II

(1U)

Signal Hi

ll

Signal Hi I

I (1

6)

Signal Hi I

I (1

7)

Signal Hi

I I

(18)

Long Beach

3/26/79

C. Mi

chae

l Scull

inProject

#791

20.

Port

ion

of

lot

102, American Co

lony

Tract,

2160 -

2258

Ga

viot

a Avenue

(Tract 36087).

Two

trenches,

maximum

depth

8 feet,

sout

hwes

t of

Cherry Hi

ll fault

(CDMG, 1976gg).

Trenches 1-

2:

No faulting

in te

rrac

e de

posi

ts of

upper

Plei

stoc

ene

Lake

wood

Fo

rmat

ion

(Qt

of Jennings,

1962).

Long Beach

8/1/

79

C. Mi

chae

l Sc

ull

inPr

ojec

t #7

9155

. Lo

ts

5 and

6, Tract

3593,

2298

Rose Avenue.

'B'

One

trench,

maximum

dept

h 9

feet

, southwest

of Cherry Hi

ll fault

(CDMG, 1976gg).

No faulting in up

per

Plei

stoc

ene

terrace

depo

sits

of Lakewood Fo

rmat

ion

(Qt

of Jennings,

1962

).

Long Be

ach

5/21

/78

Base

line

Co

nsul

tant

s,

I nc.

Proj

ect

#95-

058.

B

and

B Property,

Cherry Avenue and

Hill

St

reet

.

One

tren

ch,

unspecified

depth, southwest

of Cherry Hi

ll fault

(CDMG, 1976gg).

No fa

ulti

ng

in upper

Pleistocene

terr

ace

depo

sits

(Q

t of Jennings,

1962).

Long Beach

10/18/79

C. Mi

chae

l Scull

inPr

ojec

t #7

9171

. Tentative

Tract

36810, 20

01 21st St

.

Two

tren

ches

, ma

ximu

m depth

7 feet,

southwest

of Cherry Hi

ll fault

(CDMG,

No faulting in

up

per

Plei

stoc

ene

terrace

depo

sits

of

Lakewood Fo

rmat

ion

(Qt

of Jennings,

1962

).

1976gg)

Long Beach

9/7/

79C.

Mi

chae

l Sc

ulI

inProject

#79163.

Tentative

Trac

t 37297, 2121 Hi

I I

St.

One

tren

ch,

maximum

depth

12 feet,

southwest

of Cherry Hi

ll fault

(CDMG, 19

76gg

) No faulting

in upper

Pleistocene

terr

ace

deposits of Lakewood Fo

rmat

ion

(Qt

of Jennings,

1962

).

Long Be

ach

7/27

/77

H. V. La

wmas

ter

and

Co.,

Inc.

File No

. 77

-515

G.

15+

Acre

site lo

cate

d southerly

of

Will

ow St

. and

easterly of

Junipero Avenue.

Eigh

t tr

ench

es,

3 to

5

feet deep,

acro

ss Pi

ckle

r and

Nort

heas

t Flank

faul

ts

(CDM

G, 19

76gg

).

Trenches 1-

8:

No fa

ulti

ng in

up

per

Plei

stoc

ene

Lake

wood

Fo

rmat

ion

or th

e underlying lo

wer

Pleistocene

San

Pedro

Form

atio

n (Q

t and

Qm of Jennings,

1962

).

County

(City)

of

Juri

sdic

t io

n

County

(City)

Fi le

Number

CDMG AP Fi le

Numb

er

7-1/

2 Minute

Quad

ran

g I e( s)

Date

of

Repo

rt(s

)(Mo/da/yr)

Investigating

F i r

m or

Geologist

Iden

tifi

cati

on Number and

Site

De

scri

ptio

n Where

noCi

ty or County Number

Ing Ie

wood

-New

port

Fa

ult

Zone.

Los

Angeles

and

Oran

ge Co

unti

es (F

igs.

22

-25)

Signal Hi

II

(19)

Signal Hi

ll

(20)

Signal Hill

(21)

Signal Hill

(2

2)

Signal Hi

ll

(23)

Signal Hi I

I (2

4)

Signal Hi

ll

(25)

Long

Be

ach

7/27/79

Base

line

Co

nsul

tant

sProject

#3U8-079.

Prop

osed

De

velo

pmen

t, 23

30 Junipero

Aven

ue.

One

trench,

8 feet de

ep,

nort

heas

t of

Cherry Hi

ll fa

ult

(CDM

G, 1976gg).

No

faul

ting

in Pleistocene

sand

ston

es (Qm

or Qt

of Jennings,

f962

).

Long Beach

7/6/

79Ha

r ley Tu

cker

, In

c.Pr

ojec

t #287-79.

Lot

1U,

Trac

t 27021, Molino Avenue.

Four tr

ench

es,

maxi

mum

depth

15 feet,

nort

heas

t of Cherry Hi

ll fa

ult

(CDM

G, 1976gg).

Tren

ches

1-

U:

No faulting in lo

wer

Pleistocene

San

Pedro

Form

atio

n (Qm

of Jennings,

1962

).

Long

Be

ach

9/U/

81Ba

seli

ne Co

nsul

tant

s,

Inc.

Project

#855-081.

Papa

daki

s property,

2735

Hi I

I St.

One

trench,

6 1/

2 feet de

ep,

sout

hwes

t of

No

rthe

ast

Flank

fault

(CDMG, 19

76gg

).

No faulting in

up

per

Pleistocene

terrace

deposits (Qm or Qt of Je

nnin

gs,

1962).

Long

Be

ach

6/20

/80

Base

line

Co

nsul

tant

s,

Inc.

Proj

ect

#562-060.

Hugh

Seed Property,

Ohio Avenue,

south

of Hi

ll Street.

One

tren

ch,

6 feet de

ep,

nort

heas

t of

Cherry Hi

ll fault

(CDM

G, 1976gg).

No

faul

ting

in terrace

sand

s of

Lakewood Formation

(Qm

or Qt of

Jennings,

1962).

Long Be

ach

7/7/

80C. Michael

SculI

in20

70 Stanley

Aven

ue

One

trench,

6 1/

2 feet de

ep,

sout

hwes

t of Cherry Hill fault

(CDMG, 1976gg).

No fa

ulti

ng in

upper

Plei

stoc

ene

terrace

deposits of

Lakewood Fo

rmat

ion

(Qt

of Jennings,

1962

).

Long Beach

3/7/

79Converse Wa

rd

Davis

Dixo

nProject

#79-2107-01.

Lots 63

and

6U of lo

t 5,

(off)

Terr

ace

D r

i ve.

Thre

e tr

ench

es,

5 to 10

feet deep,

sout

hwes

t of

Cherry Hill fault

(CDMG, 1976gg).

Tren

ches

1-3:

No fa

ulti

ng

in terrace

depo

sits

(Qt

or Qm of Jennings,

1962).

Long Beach

9/7/

79C. Mi

chae

l SculI

inProject

#79162.

Avenue.

1995

Molino

One

trench,

maxi

mum

dept

h 12

fe

et,

southwest

of Cherry Hill fault

(CDMG, 1976gg).

No faulting

in upper

Pleistocene

terrace

deposits of

Lakewood Fo

rmat

ion

(Qt

of J

ennings, 19

62).

County

(City)

of

Juri

sdic

tion

County

(City)

File

Number

CDMG AP Fi le

Number

7-1/

2 Mi

nute

Qu

adra

ngle

(s)

Date

of

Report(s)

(Mo/da/yr)

Investigating

Fi rm or

Geologist

Iden

tifi

cati

on Number and

Site

De

scri

ptio

n Where

noCity or

County Number

vo to

Ing Ie

wood

-New

port

Fault

Zone

. Lo

s An

gele

s and

Oran

ge Co

unti

es (Figs. 22

-25)

Signal Hi

ll

(26)

Signal Hi I

I (2

7)

Signal Hi

I I

(28)

Signal Hill

(29)

Signal Hi

ll

(30)

Signal Hi

ll

(31)

Signal Hi

I I

(32)

Long Be

ach"

7/25/78

Baseline Co

nsul

tant

sPr

ojec

t #140-078.

Band

B

property,

20th

St

.

One

tren

ch,

maxi

mum

depth

14 1/2

feet

, so

uthw

est

of Cherry Hi

ll fault

(CDM

G, 1976gg).

No faulting in

up

per

Pleistocene

terrace

depo

sits

(Qt

of

Jennings,

1962

).

Long Beach

U/25/79

Robe

rt St

one

and

Asso

ciat

esJo

b #1392-00.

Prop

osed

Signal

Hills

Cond

omin

iums

, Po

rtio

n of

Trac

t No

. 35227, 19

03 Temple St

.

One

trench,

unspecified

depth, so

uthw

est

of Cherry Hi

ll fault

(CDM

G, 1976gg).

No faulting in sedimentary

deposits of

up

per

Pleistocene

Lakewood Fo

rmat

ion

(Qt

of Jennings,

1962

).

Long Beach

8/12

/80

William

R. Munson

Portion

of lo

ts U

and

5,

Catalina St

reet

Tract,

2099

Temple St

.

One

tren

ch,

6 to

7

1/2

feet

deep,

northeast

of Cherry Hi

ll fault

(CDMG, 1976gg).

Stee

ply

dipp

ing

frac

ture

s, but

no faulting

in upper

Pleistocene

terrace

depo

sits

(Q

t of

Jennings,

1962

).

Long Be

ach

4/1/

78Jo

hn D. MerriI I

Project

#814

444.

Lots 1,2

and

3, Price

Pete

rson

Tract,

Temp

le Avenue - 20

th St

.

One

trench,

6 to 15

feet deep,

nort

heas

t of

Cherry Hill fault

(CDM

G, 1976gg).

No faulting in

up

per

Pleistocene

Lakewood Formation

(Qt

of J

ennings, 19

62).

Long Be

ach

12/28/79

C. Mi

chae

l Scull

inPr

ojec

t #79179.

Lot

9,

SignaI Hi

ll Tract,

2051

Orizaba

Aven

ue.

Two

tren

ches

, ma

ximu

m de

pth

8 1/

2 fe

et,

northeast

of Cherry Hill fault

(CDM

G, 1976gg)

No faulting

in upper

Pleistocene

terr

ace

deposits of

Lrkewood Fo

rmat

ion

(Qt

of Jennings,

1962

).

Long Beach

12/20/78

Base

line

Consultants

Project

#228

-128

. Hi

ll and

Hall

property,

N.E.C. 20

th St

. and

Oriz

aba

Avenue.

One

tren

ch,

10 fe

et deep,

nort

heas

t of

Cherry Hi

ll fault

(CDM

G, 1976gg).

No faulting in upper

Pleistocene

terrace

deposits (Q

t of

Jen

ning

s, 1962).

Long

Beach

10/15/80

Base

line

Co

nsul

tant

s,

Inc.

Proj

ect

#656

-090

. T.W.C.

Project, 19

80 Obispo Av

e.

One

trench,

maxi

mum

dept

h 14 fe

et,

sout

hwes

t of

Northeast

Flank

fault

(CDMG, 19

76gg

).

No faulting in

Quaternary te

rrac

e de

posi

ts (Qt

of Jennings,

1962

).

Coun

ty

(City)

of

Juri

sdic

tion

County

(Cit

y)Fi le

Number

CDMG AP Fi le

Number

7-1/2

Minu

te

Quad ran

gle(

s)

Date

of

Report(s)

(Mo/

da/y

r)

Investigating

F i rm

or

Geol

og i st

Iden

tifi

cati

on Number and

Site

Description

Where

noCity or

County Number

Inql

ewoo

d-Ne

wport

Faul

t Zone.

Los

Ange

les

and

Oran

ge Co

unti

es (F

igs.

22

-23)

Signal Hill

(3

3)

Signal Hi I

I (3

4)

Signal Hi I

I (3

3)

Signal Hill

(3

6)

Signal Hi I

I (3

7)

191

Hunt

ingt

on

(1)

UOO

Beac

h

Hunt

ingt

on

(2)

379

Beac

h

Long Beach

3/7/79

C. Mi

chae

l SculI

inProject

#79110.

Lots 10-1U,

El I

is Tract, 3399 19th St

.

One

trench,

maximum

depth

9 feet,

acro

ss No

rthe

ast

Flank

fault

(CDM

G, 1976gg).

No fa

ulti

ng

in upper

Pleistocene

terrace

depo

sits

of Lakewood Formation

(Qt

of Jennings,

1962

).

Long Beach

5/U/

79Ba

seli

ne Co

nsul

tant

s,

Inc.

Proj

ect

#300

-OU9

. Hammond

and

Seed Property,

19th St., ea

st

of Te

mple

Avenue.

One

tren

ch,

8 to 10 fe

et de

ep,

sout

hwes

t of

Cherry Hi

ll fault

(CDM

G, 1976gg).

No faulting

in up

per

Pleistocene

sand

s (Qt

of Jennings,

1962

).

Long Be

ach

11/2

9/78

C.

Michael

SculI

inPr

ojec

t #78182.

Lot

11,

Hunt Vi

lla

Tract, 3300 19th St

.

Two

tren

ches

, maximum

dept

h 7

feet

, so

uthw

est

of No

rthe

ast

Flank

fault

(CDMG, 19

76gg

) No

faulting in

te

rrac

e de

posi

ts of

up

per

Pleistocene

Lake

wood

Fo

rmat

ion

(Qt

of Jennings,

1962

).

Long

Beach

9/1U

/78

C. Michael

SculI

inPr

ojec

t #78158.

Lots

8-

13

and

west

erly

30

feet of lo

ts

1U-16, Th

erbe

rts

Tract,

1830 Re

dond

o Avenue.

Two

tren

ches

, maximum

7 feet deep,

sout

hwes

t of

No

rthe

ast

Flank

faul

t(C

DMG,

19

76gg

).

No faulting in

terrace

depo

sits

of

up

per

Pleistocene

Lake

wood

Form

atio

n (Qt

of Jennings,

1962

).

Long

Beach

12/1

2/77

C. Mi

chae

l SculI

inPr

ojec

t #7722U.

Port

ion

of

lot

2UB,

Hunt Villa

Tract,

19th St

. and

Obispo Av

enue

.

One

trench,

6 to 7

feet deep,

nort

heas

t of

Cherry Hi

ll fault

(CDM

G, 1976gg).

No faulting

in upper

Pleistocene

terrace

depo

sits

of

La

kewo

od Formation

(Qt

of Jennings,

1962

).

Sea

I Be

ach

1/2U

/77

John D.

MerriI I

Proj

ect

#63U75.

Unit

1,

Tract

9168,

Hunt

ingt

on Ha

r­

bour.

One

tren

ch,

19 feet deep,

acro

ss So

uth

Bran

ch of

In

glew

ood-

Newp

ort

fault

(CDMG,

1976qq).

No faulting

in Ho

loce

ne de

posi

ts (Qal of Jennings,

1962

).

Seismic

pro­

fi

ling

sh

owed

the

fault

to di

srup

t se

dime

nts

60 fe

et beneath

the

site

.

Seal Be

ach

12/1

0/76

Earth

Rese

arch

Associates,

Inc.

Job

#32U

-76.

Parcel U,

Bl

ock

182,

16692

Dolo

res

Street.

One

tren

ch,

maxi

mum

depth

13 feet,

nort

heas

t of

No

rth

Bran

ch of In

glew

ood-

Newp

ort

faul

t (C

DMG,

19

76qq

).

No fa

ulti

ng

in Pleistocene

terrace

depo

sits

(Q

m of Je

nnin

gs,

1962

).

County

(Cit

y)of

Ju

risd

icti

on

County

(Cit

y)File

Number

CDMG AP File

Number

7-1/2

Minu

te

Quad

ran

g I e( s)

Date

of

Report(s)

(Mo/

da/y

r)

Investigating

Fi rm

or

Geol

og i st

Identification Nu

mber

and

Site De

scri

ptio

n Where

noCity o

r County Nu

mber

vo m

Ing Iewood-Newport Fault

Zone.

Los

Ange

les

and

Oran

ge Co

unti

es (F

igs.

22

-25)

Hunt

ingt

on

(3)

209

Beach

Hunt

ingt

on

(U)

31U

Beac

h

Hunt

ingt

on

Beac

h

Hunt

ingt

on

Beac

h

Huntington

Beac

h

Hunt

ingt

on

Beac

h

(5)

(6)

208

Huntington

(7)

Beac

h

(8)

399

(9)

39U

Se

al

Bea

ch

U/7

/76

H.V

. L

av/

ma

ste

rand

Comp

any,

Inc.

File No

. 76-379G-A.

Proposed

Apartment

Comp

lex,

16672

Al-

gonquin

Street.

One

trench,

maxi

mum

dept

h 9

1/2

feet,

sout

hwes

t of No

rth

Bran

ch of In

g Ie

wood

-New

port

fault

(CDM

G, 1976qq).

No faulting

in si

lty

sands, silty

clays

or buff marl (Qm

of

Jennings,

1962

).

Seal Be

ach

7/28

/76

H.V.

Lawmaster

and

Comp

any,

Inc.

File No

. 76-U1UG.

Site

of

prop

osed

Apartment

Buil

ding

s,

168U

1 an

d 16851

Lynn St

reet

.

One

tren

ch,

11 fe

et deep,

nort

heas

t of

No

rth

Bran

ch of In

glew

ood-

Newp

ort

fault

(CDMG,

1976

qq).

No faulting in

late Pl

eist

ocen

e Lakewood Fo

rmat

ion

(Qm

of Je

nnin

gs,

1962

).

Seal Be

ach

7/29

/76

H.V. Lawmaster

and

Company,

Inc.

File No

. 76

-U16

G.

Proposed

Apartment

Buil

ding

, 1683U

Blanton

Stre

et.

One

tren

ch,

15 fe

et deep,

nort

heas

t of North

Bran

ch of In

glew

ood-

Newp

ort

fault

(CDMG,

1976qq).

No faulting

in late Pleistocene

Lakewood Formtion (Qm

of Jennings,

1962

).

Seal

Be

ach

U/7/

76

H.V.

Lawmaster

and

Comp

any,

Inc.

File No

. 76-378G-A.

Proposed

Apartment

Comp

lex,

16822

Sims

Street.

One

tren

ch,

maxi

mum

dept

h 12

1/

2 fe

et,

nort

heas

t of North

Branch of In

glew

ood-

New­

po

rt fault

(CDM

G, 19

76qq

).

No faujting in silty

clays, si

lty

sands

or greenish

brow

n ma

rly

siltstones (Qm

of Jennings,

1962

).

Sea

I B

each

8/1

0/7

9

Baselin

e C

onsultants

Pro

ject

#357-0

79.

Curt

is

De

velo

pm

en

t P

roje

ct,

W

arn

er

Ave

nu

e.

One

tr

en

ch

, m

axim

um

depth

15

fe

et,

no

rth

ea

st

of

Bo

lsa

-Fa

irvie

w fa

ult

(CD

MG

, 1976qq).

N

o fa

ultin

g

in

Ple

isto

cene

Lake

woo

d F

orm

atio

n

(Qm

o

f Jennin

gs,

1962).

Sea

I Beach

10/1

5/76

Te

rrat

ech,

Inc.

Proj

ect

#1883.

Unit

1,

Tract

8636

, Hu

ntin

gton

Har­

bour.

One

tren

ch,

19 feet deep,

nort

heas

t of South

Bran

ch of In

glew

ood-

Newp

ort

fault

(CDM

G, 1976qq).

No fa

ulti

ng in "H

oloc

ene

depo

sits

" (Qm

of Jennings,

1962

).

Seal Be

ach

10/2

8/76

Earth

Rese

arch

Associates,

Inc.

Job

#27U

-76.

Pr

opos

ed Apart­

ment

Co

mple

x, Bo

lsa

Chic

a Rd

. South

of Warner Street.

Three

tren

ches

, 10

to

12

feet deep,

nort

heas

t of

No

rth

Bran

ch of In

glew

ood-

Newp

ort

faul

t (C

DMG,

19

76qq

).

Tren

ches

1-3:

No faulting in Pleistocene

terr

ace

depo

sits

(Qm

of Jennings,

1962

).

County

(City)

ofJurisdiction

County

(City)

Fi le

Number

CDMG AP Fi le

Numb

er

7-1/

2Mi

nute

Quad

ran

g le

( s)

Date

of

Report( s)

(Mo/da/yr)

Invest iga

t ing

F i r

m or

Geol

og i st

Iden

tifi

cati

on Number and

Site De

scri

ptio

n Wh

ere

noCi

ty or

County Number

IngJew

ood-N

ew

port

F

au

lt

Zo

ne

.

Hunt ington

Beac

h(1

0)2U

7

Hunt

lngt

on

Beac

h(ID

250

vo

Hunt

ingt

on

Beach

Se

al

Be

ach

(12)

(D

Lo

s A

ngele

s

an

d

Ora

ng

e

Counties

(Fig

s.

22-2

5)

Sea

I B

ea

chU/

2/76

Su

pple

- me

nt

6/25

/76

Irv

i ne

So i

I s

Engi

neer

ing

and

Testing

Labo

rato

ry

Job

#102M-9U.

Tracts 8630,

8893 and

889U

, Graham St

reet

and

Slater Av

enue

.

One

tren

ch,

unspecified

dept

h, no

rthe

ast

of No

rth

Bran

ch of Ing Ie

wood

-New

port

fault

(CDM

G, 19

76qq

).

No fa

ulti

ng in "H

oloc

ene

allu

vium

" (Q

t of Jennings,

1962).

Sea

I Beach

6/22/76

H.V. Lawmaster

and

Comp

any,

In

c.Fi

le No

. 76-UOUG.

Trac

t No,

7635:

Lot

Nos. 32

,33,

3U,3

5 and

37,

near

Ta

lber

t Av

enue

and

Edwa

rds

Street.

Three

tren

ches

, 15 feet de

ep,

acro

ss No

rth

Branch of

In

g Ie

wood

-New

port

fault

(CDMG,

1976qq).

Trenches 1-3:

No fa

ulti

ng

in "l

ower

Pleistocene

San

Pedro

Form

atio

n" or

Ho

loce

ne al

luvi

um (Qt

and

QaI

of Rogers,

1965

).

Sea

I Be

ach

9/20

/7U

Dames

and

Moor

eJo

b #6192-001-02.

Seac

liff

Vi

llag

e, Huntington Beach

Company.

One

tren

ch,

10 feet deep,

acro

ss pr

ojec

ted

trac

e of

Ing Ie

wood

-New

port

fault

(CDM

G,

1976

qq).

No

faulting in

up

per

Pleistocene

Lakewood Fo

rmat

ion

(Qt

of Rogers,

1965

)

Seal Be

ach

U/30

/80

MedaI

11, Ar

agon

,re

vise

d Wo

rswi

ck &

Assoc.

12/1U/81

Proj

ect

#S1753C

Tren

ches

ac

ross

20 ft

. wi

de zo

ne of discontinuous

strata along

Seal Be

ach

fault.

Silt

greater

than 125,000

years

old

disp

lace

d at

le

ast

a fe

w feet;

35,000-50,000

year

ol

d paleosol di

spla

ced

a few

inch

es.

Modern so

lum

probably younger th

an

15,0

00 to 20

,000

ye

ars

old

cont

ains

a

few

small

cracks.

CF:

C

hino

Fau

lt:

MH

SF

: M

urr

ieta

Ho

t Sp

rings

Fau

lt

Fig. 26

- L

ocat

ions

of

engineering

geol

ogy

reports

alon

g st

rand

s of

Elsinore

fault

zone b

y Riverside

County

number.

See

Fig.

1 for

location a

nd F

ig.

2 fo

r ex

plan

atio

n of s

ymbols.

Coun

ty(City)

ofJurisdiction

County

(Cit

y)Fi

le

Number

CDMG AP Fi l

eNumber

7-1/2

Minu

teQuadrangle! s)

Date of

Repo

rt ( s)

(Mo/

da/y

r)

Inve

st iga

t ing

F i r

m or

Geol

ogis

t

Identification Nu

mber

and

Site

Description

Wher

e no

City or

County Nu

mber

Elsi

nore

Fault

Zone

. Riverside

County (Fig.

26)

Riverside

H

Rive

rs ide

22

vo 00

Riverside

44

Rive

rs ide

45

Temecula,

Pechan

ga7/10/73

F. Beach

Leig

hton

an

d Associates

Job

#73222

Trenches,

8-13 fe

et de

ep,

acro

ss strands

of Wo

lf Valley fauft

zone (K

enne

dy,

1977;

CDMG

, 19

80f,

a) an

d Willard

fault

zone

(Envicom,

1976

).

Near v

ertical

join

ts w

ith

no of

fset

in al

luvi

um (Qal,

Kenn

edy,

19

77)

acro

ss strand of

Wolf

Vall

ey fault

in

sout

hern

most

tr

ench

es.

Fault

cuts

ol

d terrace

depo

sits

(Pauba Fo

rmat

ion,

Qps,

Kenn

edy,

19

77)

and

does

no

t displace al

luvi

um al

ong

possible northern ex

tens

ion

of

Wolf Valley fault

or strand of

Wi

llar

d fault

(Envicom,

1976

).

Murrieta

11/29/74

Murp

hy,

M.A.

rev.

and

Associates

7/12

/75

Revi

sed

spec

ific

pl

an 10

3-C/

W

Tren

ches

, av

erag

e depth

5-7

feet,

acro

ss Mu

rrie

ta Hot

Spri

ngs

fault

(Ken

nedy

, "Fractures"

in "T

emec

ula

Arkose"

(Qus an

d Qps, Ke

nned

y, 19

77);

no

fa

ulti

ng

in

floodplain sediments

(Qal,

Kennedy, 19

77).

Murrieta

2/13

/76

Earth

Research

Associates,

Inc,

Tren

ches

, depth

7-14

fe

et,

acro

ss Mu

rrie

ta Hot

Springs

fault

(Ken

nedy

, 19

77).

Gouge

zones,

in un

name

d pre-Pauba

Formation

(Qus,

Kenn

edy,

19

77);

no

fa

ulti

ng

in al

luvi

um (Qal,

Kennedy, 19

77).

Coro

na So

uth,

Lake Ma

thew

s2/

13/7

6 Pioneer

Cons

ulta

nts

Job

#2316-001

Riverside

69

R iv

ers ide

70

Tren

ches

to a

dept

h of 12 fe

et ac

ross

strands

of G

len

Ivy

Nort

h fault

(Weber,

1977

; CD

MG,

1980

c,g.

) Fault

gouge

and

slickensides re

ported

in older

fan

depo

sits

(Q

of,

Webe

r, 1977).

"Rift

valley"

(30

ft.

deep

, 100

ft.

wide); water

line

in

vicinity o

f Hu

nt Ro

ad re

quir

es an

nual

re

pair

; ma

y be ca

used

by continuous creep; pa

rall

el cr

acks

in

as

phal

t of La

wson

Ro

ad.

Coro

na South

3/22/77

Pioneer

Cons

ulta

nts

Job

#246

6-00

1

Tren

ches

up to 10

fe

et deep ac

ross

Ch

ino

fault

(Weber,

1977

; CD

MG,

1980

c).

Consul­

tant reported that Chino

fault

cuts

alluvium (Q

sc or

Qof,

Weber, 19

77)

in three

trenches.

The

structures observed were di

smis

sed

as se

dime

ntar

y features by

Tony

Brown

(Riverside County ge

olog

ist)

up

on examination

of tr

ench

es

in neighboring

site

s GR-72

and

105.

Teme

cula

3/21/75

Pioneer

Consultants

Job

#120

8-09

5

Trenches,

dept

h 12-14

feet

, ac

ross

strand of

Wi

llar

d fault

(Ken

nedy

, 19

77).

No

fa

ulti

ng

in al

luvi

um (Qal,

Kenn

edy,

19

77).

vo

vo

County

(City)

of

Juri

sd iction

County

(City)

Fi le

Number

CDMG

AP

Fi le

Number

7-1/

2 Minute

Quad

ran

g le

( s)

Date

of

Repo

rt ( s)

(Mo/da/yr)

Invest igat in

g F

i rm

or

Geol

og i st

Iden

tifi

cati

on Number and

Site

De

scri

ptio

n Where

no

City or

County Number

Elsinore Fault

Zone.

Riverside County (F

ig.

26)

Riverside

72

Riverside

79

Rive

rside

Riverside

Rive

rside

Riverside

Rive

rsid

e

Riverside

102

105

107

118

122

Coro

na South

3/15/77

C. Michael

Scull

inProject

#77129

Tren

ches

up to 10 feet de

ep west of

Chino

fault

(Web

er,

1977

; CDMG,

1980c);

no

faulting

in ol

d alluvium (Qsc an

d Qof, We

ber,

19

77).

WiIdomar

5/20

/77

LeRo

y E. Ra

ndPa

rcel

Map

No.

9070

Tren

ch average

dept

h 7

feet,

northeast of

Willard fault

(Kennedy,

1977

).

ing

in alluvial fan

debr

is (Q

al,

Kennedy, 1977).

No fault-

Wi Ido

mar

6/29

/77

Lewis

S. Lo

hrJob

#31-77-6

Three

tren

ches

, average

dept

h 9

feet,

acro

ss th

ree

strands

of Wi Idomar

fault

zone

(Kennedy,

1977

; CDMG,

1980

h).

No fa

ulti

ng in

Paub

a Formation

(Quc and

Qps,

Kennedy,

1977)

northernmost trench.

"Nor

th Br

anch

of

WiIdomar fault

displaces Pa

uba

Forma­

tion

within three

feet of

su

rfac

e in

mi

ddle

trench.

South

Branch of

WiIdomar fault

displaces Pauba

Form

atio

n within on

e fo

ot of

surf

ace

in southernmost trench.

Prop­

erty is lo

cate

d directly southeast

of cl

osed

topographic

depression within WiIdomar

fault

zone.

EIs

i no re

11/114/77

J.F.

Stickel

fie As

soc.

Job

#

18

77

-00

1

Tre

nc

h,

avera

ge

dep

th

12

fee

t,

in W

illa

rd

fau

lt

zon

e (W

eb

er,

1

97

7).

in

allu

viu

m

(Qiv

an

d Q

if,

Web

er,

19

77

).N

o fa

ult

ing

Co

ron

a N

ort

h12/1

7/7

7

C.

Mic

hael

Scu

ll i

nP

roje

ct

#77217

Tre

nc

he

s

up

to

9 fe

et

acro

ss

Ch

ino

fa

ult

(W

eb

er,

1977);

no

fa

ult

ing

in

c

ol-

lu

vim

an

d

old

a

llu

viu

m

(Qsc

an

d

Qo

f,

Web

er,

19

77

).

Alb

erh

iI I

, E

Is i

no r

e1

2/1

/77

J.F

. S

tickel

fie

As

so

c.

Job

#1918-001

Tren

ches

, average

depth 13 fe

et,

across st

rand

of Glen Ivy

North fault

(Weber,

1977

; CDMG,

1980

e,b)

. No fa

ulti

ng in

alluvium (Q

iv,

Webe

r, 1977).

AlberhiI I

U/11

/78

Lewi

s S. Lo

hrJob

#52-

78-3

Tren

ch,

aver

age

dept

h 10 fe

et,

acro

ss st

rand

of

Wi

llar

d fault

(Weber,

1977

);

no fa

ulti

ng

in floodplain an

d valley fill (Q

iv,

Webe

r, 19

77).

Albe

rhiI

I5/

25/7

8 Lewis

S. Lo

hrJob #54-78-3

Tren

ches

, av

erag

e depth 9

feet,

acro

ss po

ssib

le strand of

Glen Ivy

North

faul

t (W

eber

, 19

77;

CDMG

, 19

80e)

; no fa

ulti

ng

in Pauba

Form

atio

n and

floodplain and

valley fill (Qp

and

Qov, We

ber,

1977).

County

(C i ty

)of

Jurisdict io

n

County

(Cit

y)Fi

le

Number

CDMG

AP

File

Number

7-1/

2 Minute

Quadrangle( s)

Date

of

Report( s)

(Mo/

da/y

r)

Investigat ing

F

i rm

or

Geologist

Iden

tifi

cati

on Nu

mber

and

Site De

scri

ptio

n Where

noCity or

Co

unty

Nu

mber

O

o

El si no re

Faul

t Zone.

Riverside

County (Fig... 26)

Rive

rsid

e 1U1

Rive

rsid

e 1U

3

R i ve rs i de

R i ve rs i de

179

Rive

rsid

e 18

6

Rive

rsid

e 190-S

Rive

rsid

e 19U

Rive

rsid

e 19

7

1148

1150

Murrieta

U/22/80

F. Be

ach

Leig

hton

and

Asso

ciat

esJo

b #67837-03

Trenches,

dept

hs 7-

11 feet,

acro

ss tr

ace

of Wi

ldom

ar fa

ult

(Kennedy,

1977

; CD

MG,

1980

d).

Poss

ible

fault

in al

luvi

um (Q

al,

Kennedy, 19

77).

Evidence presented

for

slig

htly

different

loca

tion

than that shown

by Ke

nned

y.

AI be rh

iI

I8/22/78

Lewis

S. Lo

hrJo

b #6

6-78

-8

Trench,

average

dept

h 9

feet,

acro

ss st

rand

of

Wi

.lla

rd fa

ult

(Web

er,

1977).

No fa

ulti

ng in alluvium (Q

iv,

Weber, 19

77).

Murr

ieta

9/6/78

Lewis

S. Lo

hrJo

b #6

8-78

-9

Trench,

average

depth

10 fe

et,

acro

ss possible st

rand

of

Wi

llar

d fault

(Env

icom

, 19

76).

No

fa

ulti

ng

in alluvium (Q

al,

Kennedy, 19

77).

AI be rh

iI

IU/

25/7

9 C.

Michael

Scull

inJo

b #7

9125

Trenches up

to

12

feet deep ac

ross

tr

ace

of un

name

d fa

ult

(Web

er,

1977)

para

llel

to

and

about

one-half mi

le no

rth

of Gl

en Iv

y North

faul

t.

Fault

goug

e re

port

ed in older

allu

vium

(Qov,

Webe

r, 19

77);

al

luvi

al fan

(Qfi

) an

d st

ream

channel

deposits (Qsct)

not

faulted.

WiId

omar

7/8/

79Le

wis

S. Lohr

Job

#79-

79-7

Trench,

aver

age

depth

9 fe

et,

acro

ss br

anch

of

Wi

ldom

ar fault

(Kennedy,

1977;

CDMG,

1980

h).

No faulting in

Pauba

Form

atio

n (Q

ps,

Kennedy, 17

7).

Murr

ieta

3/7/

78F. Be

ach

Leig

hton

and

Asso

ciat

esJo

b #6780U3-01

Trenches,

5-8

feet deep,

acro

ss Wildomar fault

(Ken

nedy

, 19

77;

CDMG,

1980d).

Alluvium fa

ulte

d ag

ains

t Pauba

Form

atio

n (Q

al and

Qps, Kennedy, 1977).

Teme

cula

2/7/

80Ke

nnet

h G. Os-

borne

& Assoc.

Job

#2888-1,5,11

Trenches,

dept

h 5-

13 feet,

acro

ss Wi

ldom

ar fault

(Kennedy,

1977

; CD

MG,

1980

f).

Faul

t se

para

tes

Pauba

Form

atio

n and

alluvium (Qps and

Qal,

Kennedy, 1977).

Pavement

along

Ynez

Ro

ad (w

est

of site)

dist

urbe

d along

alignment

of Wil

doma

r fault.

Murr

ieta

12/1U/79

Jame

s P.

Mc

Gold

- ri

ck,

Con.

Eng.

Parc

el Map

NO.136U8

Seven

trenches,

maxi

mum

dept

h 15

fe

et,

nort

heas

t and

acro

ss Wildomar fault

(Ken

nedy

, 19

77;

CDMG,

1980d).

Tren

ch 1:

we I I-developed, ir

on-s

tain

ed reverse

fault

plane

offs

etti

ng Te

mecu

la (?

) and

poss

ibly

Pauba

(?)

Form

atio

ns (Q

t and

Qp,

Kennedy, 19

77).

No

fa

ulti

ng

in ov

erly

ing

alluvium (Qal,

Kennedy, 19

77).

County

(City)

ofJu

risd

let ion

County

(Cit

y)File

Numb

er

CDMG AP Fi le

Number

7-1/2

Minu

teQuad

rang le( s)

Date

of

Report( s)

(Mo/

da/y

r)

Inve

st iga

t in

gF

i rm

orGe

olog

i st

Identification Number and

Site Description Where no

City

or County Number

Elsi

nore

Fault

Zone

. Ri

vers

ide

County (F

ig..

26)

Rive

rsid

e 19

9

Rivers ide

Rive

rsid

e

Riverside

Riverside

Rive

rsid

e

Riverside

202

216

218

219

225

Riverside

229

1192

1232

1247

1269

1216

221-

S 12

32

12UU

1270

Pechanga

6/13/80

Pioneer

Consultants

Job

#1208-159

Nine

teen

trenches ac

ross

Wildomar fa

ult

zone

(Kenne

dy,

1977;

CDMG,

1980

a).

Tren

ches

1,

7,8,

11,1

2,13

,14:

faulted

alluvium (Q

al,

Kennedy, 19

77).

Tr

ench

U:

faulting

in Pauba

Form

atio

n but

no of

fset

in Re

cent

colluvial

tops

oil

(Qp

and

Qal,

Kennedy, 1977).

Tren

ch 15

: fa

ulti

ng in

Pauba

Formation

and

overlying alluvium

(Qp

and

Qal, Kennedy, 1977).

Tren

ch 6:

Pa

uba

(?)

Formation

extensively fa

ulte

d but

disp

laye

d lack of

shear

zones

and

gouge

form

ation

(Qp, Kennedy, 19

77).

Murr

ieta

1/19/79

Pioneer

Consultants

Job

#1208-1

56,1

57,

158,1

59

Two

tren

ch

es,

12-1

5

fee

t d

ee

p,

ac

ros

s

str

an

ds

of

Wil

lard

fa

ult

(E

nv

ico

m,

19

76

).

No

fau

ltin

g

in

allu

viu

m

(Qal,

Ken

ned

y,

19

77

).

Mu

rrie

ta7

/79

Fu

gro

, In

c.

Pro

jec

t #79-2

33-0

1

Fo

ur

tre

nc

he

s

av

era

gin

g

10

fee

t d

eep

acro

ss

Wil

do

ma

r fa

ult

(K

en

ned

y,

1977;

CD

MG

, 1980d

).

Tre

nc

h

3:

fau

lt

"ab

rup

tly

te

rmin

ati

ng

an

d

off

sett

ing

a

sa

nd

/sil

t,

iro

n-

sta

ine

d

co

nta

ct

in

all

uv

ium

" (Q

al,

Ken

ned

y,

19

77

).

Mu

rrie

ta7/7

9F

ug

ro,

Inc.

Pro

jec

t #

79

-23

3-0

0

Tre

nc

he

s

10-1

2

feet

dee

p

no

rth

east

of

Wild

om

ar

fau

lt

(Ke

nn

ed

y,

19

77

; C

DM

G,

19

80

d);

no

fa

ult

ing

in

a

llu

via

l o

verb

an

k

and

fl

oo

dp

lain

d

ep

os

its

(Q

al,

Ken

ned

y,

19

77

).

Mu

rrie

ta8/1

/80

F.

Bea

ch

Leig

hto

n

and

A

ss

oc

iate

sP

roje

ct

#680073-0

1

Tre

nc

h,

avera

ge

de

pth

6

fee

t,

no

rth

ea

st

of

Wil

do

ma

r fa

ult

(K

en

ne

dy

, 1977);

no

fa

ult

ing

in

P

auba

s

an

ds

ton

e

(Qp

s,

Ken

ned

y,

19

77

).

Pec

han

ga

10

/1/7

9

Pio

ne

er

Co

nsu

ltan

tsJo

b

#3234-0

01

Tre

nch

5

-10

fe

et

dee

p

acro

ss

co

nc

ea

led

tr

ac

e

of

Wild

om

ar

fau

lt

(Ke

nn

ed

y,

1977;

CD

MG

, 1980a).

D

ow

n-d

rag

gin

g

and

o

ffsett

ing

o

f a

thro

ug

hg

oin

g

cla

y

layer

inallu

viu

m

inte

rpre

ted

as

re

su

ltin

g

fro

m

a h

igh

-an

gle

re

vers

e

fau

lt

(Qa

l,

Ken

ned

y,

19

77

)

AI be rh

iI

I7/

21/8

0 C.

Mi

chae

l Sc

ull

inProject

#80139

Twel

ve tr

ench

es,

5-15

fe

et de

ep,

acro

ss Gl

en Ivy

Nort

h fault

(Weber,

1977

; CDMG,

1980

e).

Reverse

faul

ting

in trenches 1-3

thru

sts

older granodiorite over younger

dark fan

deposits (K

gr an

d Qo

f of

We

ber,

19

77).

Fa

ult

marked by 3-6

inch

wide zo

ne

of cr

ushe

d gouge

"offset

by sh

ears

".

In tr

ench

2,

un

faul

ted

white fan

deposits

(Qof

, We

ber,

1977)

overlies the

fault.

Murr

ieta

10/7/80

G.A. Ni

coll

an

d Associates,

Inc.

Proj

ect

#R 2310

One

tren

ch,

aver

age

dept

h 10 fe

et,

sout

hwes

t of

Wildomar fault

(CDM

G, 1980d).

No faulting

in Holocene al

luvi

um (Q

al of

Kennedy, 1977).

County

County

(City)

(City)

of

File

Jurisdiction

Number

Elsi

nore

Fa

ult

Zone.

CDMG

AP

7-1/

2 Fi

le

Minu

te

Number

Quad

ran

g le

( s)

Riverside

County (F

iq.

Date

of

Report( s)

(Mo/da/yr)

26)

Investigating

F I r

m or

Geol

og i st

Iden

tifi

cati

on Number and

Site De

scri

ptio

n Wh

ere

no

City

or

County Number

Ric

ha

rd

D.

Merk

er

Tentative

PM 16615

"Sha

llow

tr

ench

" so

uthw

est

of Gl

en Iv

y No

rth

faul

t (Weber,

1977

; CDMG,

1980e)

No

faul

t in

extremely

defo

rmed

and

goug

ed me

tamo

rpho

sed

shale

bedr

ock

(Jb,

Weber, 1977)

O

ro

Rive

rsid

e 2U9

Rive

rsid

e 258

1UU5

Rive

rsid

e 260

1329

Riverside

263

1U60

Riverside

267

1U83

Riverside

270

151U

Wi Idomar

7/21

/81

G.A.

NicolI and

Asso

c.,

Inc.

Proj

ect

#R2U67

Four

tr

ench

es,

6 to

12

1/2

feet deep,

acro

ss tr

ace

of Wi

Idom

ar fault

(Ken

nedy

, 19

77;

CDMG,

1980h).

Faul

t displacement and

carbonate-filled fr

actu

res

in two

of the

trenches in sa

ndst

one

(Qus,

Kenn

edy,

1977)

unit.

Alluvial cover

did

not

appear

to contain

any

faul

t br

eaks

Lake Ma the

ws1/

13/8

2Ge

o-Ek

ta La

bora

­ to

ries

Tract

No.

72UO

Tren

ch,

to a

maxi

mum

depth

of 11 fe

et,

acro

ss tr

ace

of Glen Iv

y fault

(Web

er,

1977

; CDMG,

1980

g).

Faul

t location determined by

the

pres

ence

of a

thre

e-fo

ot zo

ne

stai

ned

dark re

d in

brownish-gray

allu

vial

de

posi

ts (Qv, Weber, 19

77).

Slickensides

and

incl

ined

cobbles

repo

rted

in fa

ult

zone.

Wi Idomar

11/27/81

Lewis

S. Lo

hrJo

b #9

3-81

-11

Tren

ch,

maximum

dept

h 71

/2 fe

et,

sout

hwes

t of WiIdomar fault

zone

(K

enne

dy,

1977

; CDMG,

1980h).

No faulting

in al

luvi

um (Qal,

Kennedy, 19

77).

Murrieta,

Teme

cula

3/17

/82

Leig

hton

and

Associates,

Inc.

Proj

ect

#682

0059

-01

Five

tr

ench

es,

6-7

feet de

ep,

acro

ss and

nort

heas

t of WiIdomar fault

(CDMG, 1980d,f).

Tren

ches

T-1

and

T-U:

fa

ulti

ng

in Pleistocene

Paub

a Fo

rmat

ion

(Qps

of Kennedy, 1977)

Murrieta

8/8/

81Lewis

S. Lo

hrJo

b #8

9-81

-07

Two

tren

ches

, ma

ximu

m de

pth

10 fe

et,

sout

hwes

t of

WiIdomar fault

(CDMG, 19

80d)

. No fa

ulti

ng

in Ho

loce

ne al

luvi

um (Qal of Kennedy, 19

77).

EI s i no

re

10/3

1/82

California Ge

oTek

, Inc.

Project

#65UW20-01

Four

tr

ench

es,

maximum

depth

10 fe

et,

acro

ss su

bsid

iary

of Wi

Idom

ar fault

(CDM

G,

1980

b).

Trenches 1,M:

faulting

in Ho

loce

ne al

luvi

um (Ql

of Weber, 1977).

REFERENCES

State of California Special Studies Zones 7-1/2 minute quadrangles;

CDMG (19741) CDMG (1974J) CDMG (1974k) CDMG (19741) CDMG (1974m) CDMG (1974n) CDMG (1974p) CDMG (1974q) CDMG (1974r) CDMG (1974s) CDMG (1974t) CDMG (1974u) CDMG (1974x) CDMG (1974cc) CDMG (1974dd) CDMG (1974ee) CDMG (1974ff) CDMG (1974jj) CDMG (1974kk) CDMG (197411) CDMG (1974mm) CDMG (1974nn) CDMG (1974oo) CDMG (1974pp) CDMG (1976gg) CDMG (1976hh) CDMG (1976ii) CDMG (1976qq) CDMG (1976vv) CDMG (1976ww) CDMG (1977w) CDMG (1977rr) CDMG (1977tt) CDMG (1979v) CDMG (1979y) CDMG (1979z) CDMG (1979aa) CDMG (1979bb) CDMG (1979ss) CDMG (1980a) CDMG (1980b) CDMG (1980c) CDMG (1980d) CDMG (1980e) CDMG (1980f) CDMG (1980g) CDMG (1980H) CDMG (19801) CDMG (1980J)

San JacintoHemetSunnymeadLakeviewEl CascoSeven Palms ValleyIdyllwildSE 1/4 Morongo ValleySW 1/4 Morongo ValleyValyermoLebecLa Liebre RanchLake HughesJuniper HillsMescal CreekMount San AntonioLittlerockCuddy ValleyFrazier MountainSawmill MountainDevoreSan Bernardino NorthHarrison MountainSW 1/4 San Gorgonio MountainLong BeachHollywoodInglewoodSeal BeachSW 1/4 Breckenridge MountainRio Bravo RanchMount WilsonRedlandsSan Bernardino SouthSan FernandoDel SurSleepy ValleyRitter RidgePalmdaleYucaipaPechangaElsinoreCorona SouthMurrietaAlberhillTemeculaLake MathewsWildomarSan JacintoHemet

103

CDMG (1980n) Seven Palms Valley CDMG (1980o) Desert Hot Springs

Barrows, A.G., 1979a, Geologic map of the San Andreas fault zone and adjoining terrane, Juniper Hills and vicinity, Los Angeles County, California: Calif. Div. Mines and Geol., Open-File Report 80-2 LA.

Barrows, A.G., 1979b, Geology and fault activity of the Valyermo seg­ ment of the San Andreas fault zone, Los Angeles County, California: Calif. Div. Mines and Geol., Open-File Report 79-1 LA, part 1, 49 p.

Barrows, A.G., Kahle, J.E., and Beeby, D.J., 1976, Geology and fault activity pf the Palmdale segment of the San Andreas fault zone, Los Angeles County, California: Calif. Div. Mines and Geol., Open-File Report 76-6 LA, 30 p.

Barrows, A.G., Kahle, J.E., Saul, R.B., and Weber, F.H., Jr., 1974, Geologic map of the San Fernando earthquake area: in Oakeshott, G.B., ed., 1975, San Fernando, California, earthquake of 9 February 1971: Calif. Div. Mines and Geol., Bulletin 196, 463 p.

Beeby, D.J., 1979, Geology and fault activity of the Lake Hughes segment of the San Andreas fault zone, Los Angeles County, California: Calif. Div. Mines and Geol., Open-File Report 79-2 LA, part 2, 35 p.

Envicom, 1976, Riverside County Seismic Safety Element.

Jennings, C.W., 1962, Geologic map of California, Long Beach sheet: Calif. Div. Mines and Geol.

Jennings, C.W., and Strand, R.G., 1969, Geologic map of California, Los Angeles sheet: Calif. Div. Mines and Geol.

Hart, E.W., 1980, Fault-rupture hazard zones in California: Calif. Div. Mines and Geol., Spec. Publ. 42, 25 p.

Kahle, J.E., Smith, D.P., and Beeby, D.J., 1975, Annotated fault map of the Leona Valley segment, San Andreas fault zone, Los Angeles County, California: in Calif. Div. Mines and Geol., Geology of the Leona Valley segment of the San Andreas fault zone, Los Angeles County, California, Open-File Report 77-2 LA.

Kennedy, M.P., 1977, Recency and character of faulting along the Elsinore fault zone in southern Riverside County, California: Calif. Div. Mines and Geol., Spec. Report 131, 12 p.

Lo, W.Y.C., and J.G. Moreno, 1980, State of California index to geologic reports for sites within Special Studies Zones: Calif. Div. Mines and Geol., Open-File Report OFR 77-6SF, revised August 1980.

Rogers, T.H., 1965, Geologic map of California, Santa Ana sheet: Calif. Div. Mines and Geol.

104

Rogers, T.H., 1967, Geologic map of California, San Bernardino sheet: Calif. Div. Mines and Geol.

Sharp. R.V., 1972, Map showing recently active breaks along the San Jacin- to fault zone between San Bernardino and Borrego Valley, California: U.S. Geological Survey, Map 1-675.

Smith, A. R., 1964, Geologic map of California, Bakersfield sheet: Calif, Div. Mines and Geol.

Weber, F.H., Jr., 1977, Seismic hazards related to geologic factors, Elsinore and Chino fault zones, northwestern Riverside County, California: Calif. Div. Mines and Geol., Open-File Report 77-4 LA, 96 p.

Ziony, J.I., Wentworth, C.M., and Buchanan, J.M., 1973, Recency of fault­ ing: A widely applicable criterion for assessing the activity of faults: in Fifth World Conference on Earthquake Engineering, Rome 1973.

105