August 1, 2016 ADDENDUM NO. 2 I16.002.002

To The Contract DocumentsFor The Construction Of The

MAIN WIND CONE REPLACEMENT PROJECT

at the

HALF MOON BAY AIRPORTSAN MATEO COUNTY, CA

TO ALL HOLDERS OF CONTRACT DOCUMENTS:

The following additions and/or corrections shall become part of the Contract Documents andConstruction Specifications for the subject project.

Notice to all Contractors submitting bids for this work and to all contractdocument holders.

You are hereby notified of the following changes to the Contract Documents, more specifically,to the Bid Proposal Package and the construction plans for this project. This addendum shallsupersede the original contract documents wherein it contradicts the same and shall takeprecedence over anything to the contrary therein. All conditions remain the same.

PROJECT PLANS:

1. Remove the following plan sheets and replace with the ones contained in this Addendum:

G-002, Sheet index, Survey Control and Legend G-003, Main Wind Cone General Notes CG-101, Wind Cone Replacement and Erosion Control Plan CG-501, Wind Cone Details

END OF ADDENDUM

C&S ENGINEERS, INC.

August 1, 2016Jessica L. Bryan, P.E., C.M. dateDepartment Manager

8/1/16

PROPOSED TAXIWAY EDGE LIGHT

EXISTING CONTOUR LINE40

EXISTING FENCE LINE

EXISTING STORM DRAIN PIPE

EXISTING HEADWALL

EXISTING WATER LINE

EXISTING SANITARY SEWER LINE

EXISTING SANITARY SEWER MANHOLE

EX G

EXISTING GAS LINE

EXISTING OVERHEAD TELEPHONE LINE

EX T

OH/T

EXISTING UNDERGROUND ELECTRIC LINE

EXISTING OVERHEAD ELECTRIC LINE

OH/E

EXISTING UNDERGROUND TELEPHONE LINE

EXISTING LIGHT POLE

LP

UP

EXISTING UTILITY POLE

EXISTING CONCRETE DUCT MARKER

EXISTING CONCRETE CABLE MARKER

EXISTING CONCRETE SPLICE MARKER

D

C

S

EXISTING BOLLARD OR POST

EXISTING EDGE OF SHRUBS

EXISTING FLOW LINE

EXISTING BLOCK WALL

EXISTING RUNWAY OR TAXIWAY EDGE LIGHT

EXISTING AIRFIELD GUIDANCE SIGN

MW

EXISTING MONITORING WELL

EXISTING ELECTRICAL MARKER

EXISTING ELECTRICAL MANHOLE

EMH

EXISTING PULLBOX

PB

EXISTING DUCT BANK

EXISTING AIRFIELD LIGHTING CABLE IN TRENCH

EXISTING TRANSFORMER

EXISTING WIND CONE

EXISTING LIGHTED WIND CONE

EXISTING SURVEY CONTROL POINT

EXISTING AVIATION EASEMENT BOUNDARY

EXISTING DOUBLE SWING GATE

EXISTING CANTILEVER GATE

RUNWAY/TAXIWAY CENTERLINE

EXISTING AIRPORT PROPERTY LINE

EXISTING GUY WIRE AND ANCHOR

EXISTING ROAD

EXISTING AIRFIELD LIGHTING CABLE IN TRENCH

EXISTING TAXIWAY EDGE LIGHT

ABANDON IN PLACE

EXISTING POWER POLE

A

FLAGPERSON LOCATION

BARRICADE LOCATION WITH WORK

WORK AREA LIMITS / STAGING AREAS

APPROX. - APPROXIMATE

ASPH. - ASPHALT

BC - BEGIN CURVE

BLDG. - BUILDING

CIP - CAST IRON PIPE

CONC. - CONCRETE

CSP - CORRUGATED STEEL PIPE

DIA. - DIAMETER

ELEV. - ELEVATION

FND. - FOUNDATION

LT - LEFT

LP - LOW POINT

MAX. - MAXIMUM

MIN. - MINIMUM

MISC. - MISCELLANEOUS

NA - NOT APPLICABLE

OFA - OBJECT FREE AREA

PAV'T. - PAVEMENT

PC - POINT OF CURVATURE

PT- POINT OF TANGENCY

PVI - POINT OF VERTICAL INTERSECTION

PVC - POINT OF CURVATURE (VERTICAL CURVE)

PVC - POLYVINYL CHLORIDE PIPE

PVT - POINT OF TANGENCY (VERTICAL CURVE)

R - RADIUS

RCP - REINFORCED CONCRETE PIPE

RSA - RUNWAY SAFETY AREA

ROW - RIGHT OF WAY

RPZ - RUNWAY PROTECTION ZONE

RT - RIGHT

RW - RUNWAY

SHDR. - SHOULDER

SICPP - SMOOTH INTERIOR CORRUGATED

POLYETHYLENE PIPE

STA. - STATION

TOFA - TAXIWAY OBJECT FREE AREA

TSA - TAXIWAY SAFETY AREA

TW - TOP OF WALL

TYP. - TYPICAL

PI - POINT OF INTERSECTION

ABAN. - ABANDONED

CMP - CORRUGATED METAL PIPE

UD - UNDERDRAIN

PCC - PORTLAND CEMENT CONCRETE

PAVEMENT

BM - BENCH MARK

EC - END OF CURVE

FS - FINISH SURFACE

EOP - EDGE OF PAVEMENT

FF - FINISH FLOOR

GB - GRADE BREAK

W

EXISTING SANITARY SEWER CLEANOUT

EX E

EX SS

EX W

HAF 3

E

EXISTING DOMESTIC WATER METER

FG - FINISH GRADE

CMPA - CORRUGATED ARCHED METAL PIPE

FL - FLOW LINE

IE - INVERT ELEVATION

AST - ABOVE GROUND STORAGE TANK

TC - TOP OF CURB

TD - TOP OF DIKE

TF - TOP OF FOOTING

HP - HIGH POINT

ROFA - RUNWAY OBJECT FREE AREA

O.C. - ON CENTER

AREA DESIGNATION

BC-1

TP-1

TEST BORING LOCATION

TEST PIT LOCATION

EXISTING TAXIWAY EDGE LIGHT TO REMAIN

EXISTING AIRFIELD GUIDANCE SIGN

EXISTING RUNWAY OBSTACLE FREE ZONE

EXISTING RUNWAY SAFETY AREA

EXISTING RUNWAY OBJECT FREE AREA

ROFA

ROFZ

RSA

EXISTING POWER POLE

F:\Project\I16 - San Mateo County\I16.001.001- Parallel Taxiway_Half Moon Bay\Design\CADD\Border\county seal monochrome.bmp

8950 Cal Center Drive

Suite 112

Sacramento, California 95826

Phone: 916-364-1470

www.cscos.com

C&S Engineers, Inc.

PROPOSED TRANSFORMER

AMPS - AMPERES

AWG - AMERICAN WIRE GAUGE

BFG - BELOW FINISHED GRADE

PROPOSED AIRFIELD LIGHTING CABLE IN

CONDUIT. "WC/I" DENOTES ONE #8 AWG, 600V,

I/C AIRFIELD LIGHTING CABLE IN EXISTING 2"

PVC CONDUIT (REMOVE EXISTING CABLE AND

PROVIDE THIS CABLE).

PROPOSED LIGHTED WIND CONE. ALL WIND CONE

MATERIALS SHALL BE RESISTANT TO CORROSION

AND RUST

TWY - TAXIWAY

SHEET NO. SHEET REFERENCE NO. TITLE

1 G-001 TITLE SHEET

2 G-002 SHEET INDEX, SURVEY CONTROL AND LEGEND

3 G-003 MAIN WIND CONE GENERAL NOTES

4 G-101 WIND CONE GENERAL PLAN

5 G-102 CONSTRUCTION SAFETY PHASING PLAN

6 G-103 MISCELLANEOUS DETAILS

7 CG-101 WIND CONE REPLACEMENT AND EROSION CONTROL PLAN

8 CG-501 WIND CONE DETAILS

WC/1

WC/1 - (SEE LEGEND ABOVE)

PROPOSED DIRECTION OF

CONSTRUCTION TRAFFIC

HORIZONTAL DATUM:

CALIFORNIA COORDINATE SYSTEM, ZONE 3

NORTH AMERICAN DATUM OF 1983 (NAD83), EPOCH 2005.69

VERTICAL DATUM:

NORTH AMERICAN VERTICAL DATUM OF 1988 (NAVD88)

PROJECT CONTROL:

HAF 3 HAF 8 HAF 9

N: 2016698.56 N: 2016025.82 N: 2017650.02

E: 5982244.66 E: 5981499.90 E: 5979771.41

ELEV: ELEV: ELEV:

PROPOSED STABILIZED CONSTRUCTION

ENTRANCE

CND - CONDUIT

1

1

1

1

30

30

200

60

100

8

8-1-16

Addendum 2

F:\Project\I16 - San Mateo County\I16.001.001- Parallel Taxiway_Half Moon Bay\Design\CADD\Border\county seal monochrome.bmp

8950 Cal Center Drive

Suite 112

Sacramento, California 95826

Phone: 916-364-1470

www.cscos.com

C&S Engineers, Inc.

1

1

8-1-16

Addendum 2

F:\Project\I16 - San Mateo County\I16.001.001- Parallel Taxiway_Half Moon Bay\Design\CADD\Border\county seal monochrome.bmp

8950 Cal Center Drive

Suite 112

Sacramento, California 95826

Phone: 916-364-1470

www.cscos.com

C&S Engineers, Inc.

FURNISH AND INSTALL PROVIDE NEW PRIMARY WIND CONE AND SUPPORT STRUCTURE.

REFER TO SHEET CG-501 FOR DETAILS

REMOVE AND DISPOSE OF EXISTING PRIMARY WIND CONE ASSEMBLY, CABLE,

FOUNDATION, AND OTHER INCIDENTALS AND DISPOSE OFF-SITE

CIRCULATORY SEGMENTED CIRCLE CONCRETE TO REMAIN, PROTECT IN PLACE

EXISTING WIND CONE BRANCH CIRCUIT CONDUIT AND CABLE TO REMAIN.

CONNECT NEW CABLE TO EXISTING WIND CONE STEP-UP TRANSFORMER IN

ELECTRICAL VAULT. REFER TO A1/CG-101 AND C1/CG-501.

CLEAR AND GRUB ALL VEGETATION AND ORGANIC MATERIAL AND DISPOSE OFF-SITE

CLEAR AND GRUB ALL VEGETATION AND ORGANIC MATERIAL A MINIMUM OF 5' WIDTH

ALONG LENGTH OF CONDUIT TO BE REMOVED. DISPOSE OF ALL REMOVED MATERIAL

OFF-SITE.

INSTALL SILT FENCE PER DETAIL B1/G-103

1

1

1

1

1

1

1

8-1-16

Addendum 2

PROPOSED LIGHTED WIND CONE

FURNISH AND INSTALL

TWO #12 AWG AND

ONE #12 AWG

GROUND IN 3/4"

CONDUIT

FURNISH AND INSTALL

1 KVA 600V- 120/240V

TRANSFORMER

FURNISH AND INSTALL

TWO #8 AWG 600V 1/C

AIRFIELD LIGHTING

CABLES IN 2" CONDUIT

FURNISH AND INSTALL

600V, 30A, 2-POLE

DISCONNECT SWITCH

FUSED AT 15 AMPS

EXISTING

PULL BOX IN

SEGMENTED

CIRCLE

EXISTING WIND CONE BRANCH CIRCUIT

CONDUIT AND CABLE TO REMAIN.

EXISTING

VAULT

EXISTING WIND CONE

STEP-UP TRANSFORMER

TO REMAIN

TO EXISTING BRANCH

CIRCUIT PANEL

EXISTING BRANCH

CIRCUIT TO REMAIN

PROVIDE TWO #8 AWG, 600V, 1/C AIRFIELD LIGHTING

CABLES IN 2" SCHEDULE 40 PVC CONDUIT. COORDINATE

BURIAL DEPTH IN FIELD WITH EXISTING PULL BOX.

PROVIDE SINGLE PHASE 1KVA 600V -

120/240V STEP-DOWN TRANSFORMER

IN NEMA-3R 304 STAINLESS STEEL

ENCLOSURE. BASIS OF DESIGN SHALL

BE CROUSE-HINDS SG0G11P01P OR

APPROVED EQUAL. PROVIDE 600V,

2-POLE, 30A DISCONNECT SWITCH

FUSED AT 15A ADJACENT TO

TRANSFORMER. REFER TO C1, THIS

SHEET FOR WIRING DIAGRAM.

BASIS OF DESIGN FOR PROPOSED WIND CONE SHALL BE

HALI-BRITE L-807-S2-IN-120-5 INTERNALLY LIGHTED LED OR

APPROVED EQUAL. PROVIDE ZINC-RICH PRIMER AND

POWDER COATING FOR WIND CONE SUPPORT STRUCTURE

AND FRAMEWORK, FOR CORROSION RESISTANCE. BASIS

OF DESIGN SHALL BE TIGER SHIELD SERIES 69 OR

APPROVED EQUAL. PROVIDE 120V LED OBSTRUCTION

LIGHT, CROUSE-HINDS RTLSF/120 OR APPROVED EQUAL.

PROVIDE TWO #12 AWG TYPE THHN/THWN

CABLE AND ONE #12 AWG GROUND

CONDUCTOR IN 3/4" SCHEDULE 40 PVC

CONDUIT. DIRECT BURY AT 24" BFG TO TOP

OF CONDUIT.

CIRCULATORY CONCRETE TO

REMAIN, PROTECT IN PLACE

EXISTING WIND CONE BRANCH

CIRCUIT CONDUIT AND CABLE TO

REMAIN. REFER TO A1/CG-101 FOR

CONTINUATION

3'-0"

OR

A

S R

EQ

UIR

ED

BY

M

AN

UF

AC

TU

RE

R

2'-0"

1'-0"

M

IN

.

2'-6" x 2'-6"

1'-6"

(T

YP

.)

2' TO 5'

1'-0"

CONNECT NEW #8 AWG

CABLE TO EXISTING

STEP-UP TRANSFORMER

F:\Project\I16 - San Mateo County\I16.001.001- Parallel Taxiway_Half Moon Bay\Design\CADD\Border\county seal monochrome.bmp

8950 Cal Center Drive

Suite 112

Sacramento, California 95826

Phone: 916-364-1470

www.cscos.com

C&S Engineers, Inc.

1

8-1-16

Addendum 2

1

1

TYPICAL EXISTING PULL

BOX IN FIELD.