2010 

Christina Baca, Associate Engineer 

Pebble Beach Community Services District 

10/15/2010 

Undergrounding Overhead Utilities in Pebble Beach

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Table of Contents  Page    

Introduction  3 

History  3 

2010 Undergrounding Overhead Utilities Feasibility Study  4 

What has changed between 1997 and 2010 Studies  5 

PBCSD Approach to Undergrounding OH Utilities  5 

Budget Status  6 

   

Appendices  

 

A  1996 Conversion of Overhead Utilities to Undergrounding Facilities Report 

B  Memo to Residents – Undergrounding Utility Lines October 1, 1997 

C  2010 Undergrounding Overhead Utilities Feasibility Study     

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Introduction  Pebble Beach Community Services District (PBCSD) Board of Directors (Board) and residents have expressed interest in looking into the feasibility of undergrounding overhead (OH) utilities throughout Pebble Beach, which consist of PG&E, AT&T, and Comcast utilities, due to their concern for reliability and safety.  As a forested community, Pebble Beach experiences many outages during rain and wind storms due to fallen trees.  The outages are exacerbated since Pebble Beach is essentially “at the end of the line” and often experiences outages for a longer duration than surrounding areas.  The Board has not had sufficient, nor current information to determine whether undergrounding overhead utilities in Pebble Beach provides a benefit to the community that out‐weighs the costs of undergrounding.  Furthermore, PBCSD does not have the authority from Local Agency Formation Commission of Monterey County (LAFCO) to fund undergrounding overhead utilities construction projects.  Therefore, during a strategic planning session, PBCSD Board Members have instructed staff to hire a consulting firm with technical expertise related to undergrounding overhead utility projects to conduct a feasibility study.  The intent of the feasibility study is to determine: 

the existing condition of the Pebble Beach electrical distribution system  the number and location of outages within Pebble Beach  if undergrounding overhead utilities will increase system reliability  if there are alternative system improvements to undergrounding  recommendations for initial undergrounding priorities  estimated costs of construction  the construction process 

History  The idea of undergrounding overhead utilities throughout Pebble Beach is not a new one.  In 1995, the Del Monte Forest Property Owners (DMFPO) requested that the Board investigate how the reliability of the electrical system can be improved.  Thereafter, the Board directed staff to perform an in‐house, preliminary feasibility study of converting overhead utilities to underground facilities.  Working with PG&E, staff developed the 1996 Conversion of Overhead Utilities to Undergrounding Facilities Report, which is included under Appendix A.  PBCSD staff determined 

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undergrounding was feasible in regard to constructability.  However, PG&E was against the idea as they did not have extensive experience operating and maintaining underground systems and suggested that operation and maintenance (O&M) costs would actually exceed existing aerial system O&M costs due to decreased access.  Furthermore, staff determined PBCSD did not have the resources to fully finance undergrounding projects and financing such projects would have to be a shared cost between PBCSD and residents.   The findings were presented to the Board, DMFPO, and the Pebble Beach Company (PBCo).  The group determined that more public input was required prior to making a decision.  In 1997, a letter was sent to all Pebble Beach residents that included an overview of the issues and a survey asking whether PBCSD should move forward with undergrounding projects.  A copy of the letter is included under Appendix B.    The survey yielded a negative response to the idea of undergrounding and the Board, DMFPO, and PBCo determined it was not in the community’s best interest to underground overhead utilities.     

2010 Undergrounding Overhead Utilities Feasibility Study  In response to the Boards request to conduct a current feasibility study, PBCSD staff worked with RGA Design, LLC of Dublin, CA – a consulting firm specializing in electrical systems with significant experience designing and constructing undergrounding projects.  One of the selling points of RGA, besides their experience, was their relationship with PG&E.  Many members of RGA’s team have previously worked for PG&E and have inside knowledge of PG&E’s system operations, which is considered key in determining whether undergrounding utilities in Pebble Beach would actually increase reliability.  Using their resources with the overhead utility companies, their experience with undergrounding overhead utilities, and a field investigation, RGA developed a 2010 Undergrounding Overhead Utilities Feasibility Study, which is included under Appendix C.  RGA concluded that Pebble Beach would benefit from undergrounding overhead utilities.  Their system analysis determined that PG&E has made improvements to automate and loop the system in the last 14 years, which maximizes the reliability of operations.  The existing Pebble Beach electrical distribution system is adequately designed as an aerial system ‐ not taking into account location in a heavily forested area.  At this time, the only way to significantly improve reliability within Pebble Beach is to underground the aerial system to protect it from downed trees. 

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What has changed between the 1997 and 2010 Studies  Analysis of the existing electrical system shows that there have been no significant changes in infrastructure, other than automation and additional switches, since 1997.  Pebble Beach is still supplied by the same substations and the same circuits.  Automating the system has allowed PG&E to better isolate outages when they occur, which means fewer services are affected by outages.  However the number of outages and duration are similar to that of 1997 because downed trees continue to be a large issue.  Therefore, the 2010 study also concluded that Pebble Beach would benefit from converting overhead utilities to an underground system and that construction is feasible.  There have been two significant changes since the 1997 study was conducted:  

1. PG&E has significantly changed their attitude towards underground systems.  Since 1997, a nation‐wide trend began to underground overhead utilities every time the opportunity rose.  It has become standard that new development must be supplied by underground systems and many roadway rehabilitation projects include undergrounding.  Therefore, PG&E has gained valuable experience developing undergrounding standards and O&M processes.  In 2010, PG&E welcomes and supports the idea of undergrounding overhead utilities in Pebble Beach. 

2. PBCSD now has the resources to fully fund phased undergrounding projects.  During the last 15 years, PBCSD has funded large water system improvements projects for fire protection.  The special projects funding previously allocated for these water projects has recently become available for other projects due to the completion of the water projects.  In 1997, residents yielded a negative response to undergrounding projects based on a PBCSD‐Resident cost share.  By fully funding projects, PBCSD staff anticipates residents may support such projects. 

PBCSD Approach to Undergrounding OH Utilities     Staff proposes to approach undergrounding projects similar to that of the water system improvements for fire protection projects.    With a determination by the Board to move forward with undergrounding project, staff will submit an application to LAFCO on behalf of PBCSD to acquire latent powers to underground overhead utilities.  This process will be similar to when PBCSD acquired latent powers to provide supplemental law enforcement and will take approximately 4 months.   

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 Once PBCSD has latent powers, a Basis of Design must be developed.  A Basis of Design report will develop design‐related issues, outline options, and make design recommendations.  At this point, PBCSD staff will work very closely with PG&E staff and a consulting engineer to develop the Basis of Design report, which would identify items such as the following:  

Proposed utility alignments  Location of existing underground systems  Size, length and type of conduit  Size, length and type of casings  Number and location of services  Number and location of transformers  Installation methods  Environmental considerations  Cost estimates  

 After a Basis of Design report is developed, PBCSD will follow through with any CEQA and permitting requirements.  Thereafter, PBCSD may begin the first phase of construction. 

Budget Status  PBCSD staff has a budget of $50,000 for a feasibility study.  PBCSD executed an Agreement with RGA Design, LLC in April 2010 for $27,505.  PBCSD has also spent $1,000 for PG&E mapping.    

Appendix A  

1996 Conversion of Overhead Utilities to Underground Facilities Report 

G E N E R A L M A N A G E R ' S R E P O R T March 29, 1996 To: Board of Directors From: Richard Andrews, General Manager Michael Niccum, District Engineer Subject: Conversion of Overhead Utilities to Underground Facilities ______________________________________________________________________________ RECOMMENDATIONS

1. It is recommended this preliminary undergrounding feasibility study be reviewed with the DMFPO and PBCO: to request their comments and suggestions on how the available information can best be presented to the public; and, to assist in further identifying the policy issues related to the establishment of an undergrounding program, including whether residents should be asked to determine if PBCSD should assume public service responsibilities for conversion of overhead utilities to underground facilities.

2. Authorize staff to present the proposed preliminary undergrounding planning areas identified on the attached exhibit to DMFPO and PBCo for review and comment. Pending agreement among PBCSD, DMFPO and PBCo, these or modified preliminary undergrounding planning areas would be presented to residents and property owners to determine if there is interest in proceeding further with implementation of projects within any of these areas.

3. As a matter of policy, if there is sufficient public support for continuing further planning, the

Board should decide if it would in the future consider allocating any of the District's general revenue to undergrounding projects that would provide benefits throughout or within major areas of PBCSD.

ISSUES AND CONCLUSIONS On December 29, 1995 the Board directed PBCSD staff to conduct a preliminary study to determine the feasibility of converting overhead utilities to underground facilities within the District. This action was taken in response to a request of the Del Monte Property Owners. A budget of $15,000 was authorized, with the understanding the District, DMFPO and the Pebble Beach Company would share equally in the costs of the study. As much of the information needed is proprietary in nature, most of the information derived in the feasibility study has been provided by PG&E. PBCSD and the DMFPO are primarily interested and concerned about determining how the reliability of electrical service can be improved. Therefore, the preliminary feasibility study has not considered issues such as aesthetics or impacts on property values. The feasibility study has identified the major components of the overhead electrical utility distribution system in Del Monte Forest/Pebble Beach and developed preliminary cost estimates for undergrounding overhead utilities. In addition, some potential planning areas for undergrounding overhead utilities are suggested.

General Manager's Report March 29, 1996 Page 2 of 6 Cost information developed to date indicates that undergrounding utilities throughout all of the District would be very expensive, perhaps ranging up to $54 million. However, there may be limited areas, particularly where overhead maintenance problems have occurred more frequently in the past, where the reliability of the distribution system would be improved by economically feasible underground conversion projects. If a public entity such as Monterey County, the District and/or PG&E participate in financing priority improvements to main lines and/or other general distribution system improvements it may be possible to develop projects within neighborhoods that might be economically feasible to property owners. The District does not currently have the authority to set up undergrounding improvement zones. Generally, PBCSD may only expend general District revenue for preliminary inquiries that support the District's current public service responsibilities in fire protection and wastewater collection and treatment, or for studies which yield information that will assist the public determine if PBCSD should be authorized to provide public undergrounding services. FURTHER BACKGROUND AND DISCUSSION The following summarizes information collected from PG&E, Pacific Bell, MPTV, Monterey County and from the Hill Estate Pilot Undergrounding Project located near Pescadero Point. EXISTING PG&E DISTRIBUTION SYSTEM Approximately 180,000 feet or 34 miles of overhead power distribution lines are located in Pebble Beach. The Pebble Beach PG&E service area includes five PG&E main electrical circuits from four power substations (see attached Exhibit). The areas served by these substations and main circuits are described generally below.

• Viejo 2201 circuit is a 21 kilovolt (KV) main line that originates at the Viejo substation located near the intersection of Highway 68 and Highway 1 on Carmel hill. The area served by the Viejo 2201 circuit includes the area above the 17 Mile Drive between the Carmel gate and the Robert Louis Stevenson School and about a third of the Monterey Peninsula Country Club area. The Viejo 2201 main line also provides power from the Viejo substation to the Forest substation located on Lopez Road across from the PBCSD Building.

• Forest 422 circuit is a 4 KV main line that begins at the Forest substation and serves the

Cypress Point/Pescadero Point area in southwest Pebble Beach. The Forest 422 circuit runs down Forest Lodge Road to Drake Road.

• Viejo 2202 circuit is a 21 KV main line that originates at the Viejo substation and serves the

third of the Country Club area located nearest Pacific Grove. The Viejo 202 main line runs through Monterey and Pacific Grove and enters Pebble Beach off of David Avenue.

• Pacific Grove 422 circuit is a 4 KV main line that originates at the Pacific Grove substation

General Manager's Report March 29, 1996 Page 3 of 6

located near the intersection of Junipero Avenue and Grant Avenue. This circuit serves about a third of the Country Club Area. The Pacific Grove 422 KV main line runs from David Avenue along Congress Road and Colton Road to Forest Lake.

• Carmel 402 circuit is a 4 KV main line that originates at the Carmel substation located near

the intersection of Junipero Avenue and Second Avenue and serves the area along the 17-Mile Drive between the Carmel gate and the Lodge at Pebble Beach.

PG&E MAINTENANCE INFORMATION PG&E has a total annual construction budget of $700 million of which $440 million is dedicated for the maintenance of the power and gas distribution systems. The local office of PG&E studied their maintenance cost information and estimated that the unit cost of $3.20 per linear foot to maintain underground lines was five times greater than the unit cost of $.65 per linear foot to maintain overhead lines. The maintenance cost estimate for overhead lines does not include the annual cost of tree trimming or the cost for emergency responses. PG&E has a program to trim trees to keep branches a minimum four feet away from overhead lines and the local office estimated that $80,000 is spent annually in Pebble Beach. Since the program is set up to trim the trees around each overhead power line once every three years, the unit cost to trim trees is approximately $1.33 per linear foot. The local office also estimated that $40,000 or $.22 per linear foot was spent last year on emergency responses to restore power. In order to compare the cost of maintenance for overhead and underground distribution systems, if the entire Pebble Beach distribution system was undergrounded, the cost for tree trimming and restoration should be added to the unit cost for maintaining overhead lines. It is assumed PG&E would not have any restoration and tree trimming costs with an underground system. Using PG&E's data, the cost to maintain an underground system would therefore be 30% more expensive at $3.20 per linear foot than for the current overhead system at $2.21 per linear foot. PG&E CAPITAL PROJECTS PG&E has budgeted $225,000 in 1996 to improve the existing power distribution system with the installation of automated controls that are part of a system referred to as a Supervisory Control and Automated Data Acquisition system, or "SCADA". PG&E plans include installation of SCADA reclosers at two locations, SCADA switches at three locations, tap line fuses, additional connectors and strategic tree removal. The SCADA reclosers and switches will allow the power distribution system to be sectionalized remotely from a control center in order to isolate a problem area. As the system becomes more automated, the size of the sectionalized areas required to be without power while repairs are performed will be reduced. PG&E is also working with the Pebble Beach Company forestry department to identify dead or diseased trees that can be removed in areas adjacent to main power distribution lines. These capital improvements should improve the reliability of the power distribution system by

General Manager's Report March 29, 1996 Page 4 of 6 reducing the size of areas affected and the length of time each affected area is without power due to a single event. It should be noted that some neighborhoods in Pebble Beach with underground power distribution systems were without power for several days last winter due to problems with the overhead main lines serving the area. HILL ESTATE UNDERGROUNDING "PILOT" PROJECT A project was recently completed to underground utilities on several roads around the Hill Estate near Pescadero Point. The Hill Estate project retained a contractor to perform the trenching work and each utility (PG&E, Pacific Bell and MPTV) installed the respective underground utility lines. With the understanding that the Hill Estate Project might ultimately be considered as a "pilot project" within a comprehensive undergrounding program for Del Monte Forest/Pebble Beach, the property owner agreed to coordinate with the District and to participate in this feasibility study. The Hill Estate Pilot Project actual construction costs are summarized below: Item Total Cost Unit Cost per Foot PG&E $ 64,000 $ 23.70 Pacific Bell $ 34,000 $ 12.60 MPTV $ 15,000 $ 5.55 Trenching (pavement) $ 65.00 Trenching (off-road) $ 45.00 Residence Connection $ 55.00 The project manager indicated the actual construction costs were close to the estimate prepared by PG&E to perform the work. He also reported a number of hidden expenses were encountered during the project. PG&E generally has overhead easements for the existing overhead lines in Pebble Beach but on-the-ground utility easements are required prior to installing underground utility lines. It is the policy of the Pebble Beach Company to require the party requesting a utility easement to pay for legal and surveying costs associated with preparation of the easement and easement agreement. Also, PBCo has required residents who upgrade their property to pay current road maintenance fees. (In older subdivisions road assessments are lower than in newer subdivisions.) The standard for restoration of roadway surfaces (trench width or entire roadway) can also have a significant cost impact.

General Manager's Report March 29, 1996 Page 5 of 6 PG&E STUDY FOR DRAKE ROAD PROJECT PG&E compiled a ten year outage history for the area in Pebble Beach served by the Forest 422 circuit. This information is summarized below. The quantities for the west and east sides of the Forest 422 circuit are the sum of outages on a number of feeder lines. AREA TOTAL TREE-RELATED OUTAGES OUTAGES Main Line from Viejo to Forest Substation 23 18 Forest Lake Road Main Line to Drake Road 6 2 Drake Road Main Line to Portola Road 23 21 West Side Forest 422 Circuit (Cypress Pt.) 37 35 East Side Forest 422 Circuit (Pescadero Pt.) 30 29 Based on the above, PG&E identified the Drake Road main line as the area that would most benefit from undergrounding overhead power lines due to the high number of tree-related outages. PG&E prepared a detailed cost estimate (plus or minus 10% reliability) to replace a 8,605 feet section of the Forest 422 main line along Drake Road. PG&E's total estimated costs for undergrounding this section of line are $800,000 or approximately $93 per linear foot. The cost estimate did not include the contribution-in-aid-of-construction (CIAC) tax or other utilities. PG&E indicated its own expenses to develop the Drake Road construction cost estimate to this level of detail were in excess of $5,000. (As noted earlier, $15,000 was authorized for the PBCSD preliminary feasibility study. To date, PG&E has not charged the District for any of its work in preparing information used in this report.) EVALUATION OF COST INFORMATION PG&E provided in July 1995 a rough (plus or minus 40%) cost estimate of approximately $175 per linear foot or $31.5 million to underground overhead power lines in Pebble Beach. Pacific Bell indicated the cost to underground telephone lines was approximately 60% of the PG&E cost or $105 per linear foot. MPTV indicated the cost to underground cable lines was approximately 10% of the PG&E cost or $20 per linear foot. The total cost to underground overhead lines would be approximately $300 per linear foot or a total of $54 million for all of Pebble Beach. The above cost estimates do not include CIAC tax, which if required would add an additional cost of about 30%. The Hill Estate Pilot Project found the unit cost to underground power, telephone and cable lines ranged from $85 to $105 per linear foot depending on whether the trench was located under roadway pavement. The unit cost for undergrounding service connections to each residence was approximately $55 per linear foot. PG&E prepared a detailed cost estimate (plus or minus 10%) for undergrounding the main power line on Drake Road at a unit cost of $93 per linear foot. Monterey County officials administer undergrounding projects in the unincorporated area financed

General Manager's Report March 29, 1996 Page 6 of 6 from PG&E contributions to a public projects undergrounding fund required by Public Utility Commission Rule 20. The County's experience has been that the unit cost to underground utilities generally falls between $100 and $200 per linear foot. They also indicated that PG&E estimates for undergrounding utilities are usually pretty close to the actual construction cost. POTENTIAL UNDERGROUNDING PLANNING AREAS Eight areas within Pebble Beach have been identified as possible planning areas for undergrounding utilities and are shown on the attached exhibits. It is suggested these be reviewed by the Board, DMFPO and PBCo to determine if they are acceptable as-is, or with modifications, for presentation to the community to assist in the process of determining public interest. Viejo 2201-A This area is located between Sunset Lane and Los Altos Drive and Highway 68 in upper Pebble Beach. Viejo 2201-B This area is above 17-Mile Drive and Forest Lake Road from the Carmel gate to RLS school and below Viscaino Road and Ronda Road. Viejo 2201-C This is a "U" shaped area in the Country Club area of Pebble Beach. Forest 422-A This area is bound by Drake Road and Sombria Lane, the 17-Mile Drive from Cypress Point to Midway Point and Portola Road. Forest 422-B This area is bound by the 17-Mile Drive from Midway Point to Pescadero Point and Stevenson Drive to Portola Road. Carmel 402 This area is located along the 17-Mile Drive from Carmel gate to the Lodge. Pacific Grove 422 This area is located in the Country Club area below Forest Lake. Viejo 2202 This area is located in the Country Club area between the four corners intersection of 17-Mile Drive and Forest Lodge Road and the Pacific Grove city limits. Attachments: Exhibits depicting proposed undergrounding planning areas MN/RA:lc Agenda Item No. 6

Appendix B  

Memo to Residents – Undergrounding Utility Lines October 1, 1997 

Appendix C  

2010 Undergrounding Overhead Utilities Feasibility Study 

UNDERGROUNDING OVERHEAD UTILITIES FEASIBILITY STUDY

Pebble Beach Community Services District

October 2010

RGA Design, LLC 6400 Village Parkway, Dublin, CA 94568

(925) 556-9860

Undergrounding Overhead Utilities Feasibility Study October 2010

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CONTENTS I. Purpose II. System Overview a. PG&E Electrical Distribution System

b. Comcast Cable TV System

c. AT&T Phone System III. Field Investigation and Analysis IV. Recommendations

a. Congress Road and Colton Road

b. Colton Road at Arroyo Drive to Forest Substation c. Drake Road d. Forest Lake Road e. Ondulado Road V. Overview of Construction Process EXHIBITS A - Pebble Beach Main Electrical Distribution System B - Schematic of Pebble Beach 21 KV and 4 KV Circuits (4 sheets) C - Congress and Colton Road Joint Trench Cost Estimate D - Colton Road at Arroyo to Forest Substation Joint Trench Cost Estimate E - Drake Road Joint Trench Cost Estimate F - PG&E Greenbook Standard 061032

Undergrounding Overhead Utilities Feasibility Study October 2010

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I. Purpose The purpose of this study is to identify and prioritize the sections of Pebble Beach which would most benefit from the conversion of aerial electric, phone and cable lines to underground utilities to increase system reliability. Pebble Beach Community Services District (PBCSD) has asked RGA Design, LLC to divide the work into approximately $1,000,000 portions and prioritize them with regards to severity and frequency of outages, keeping in perspective the constructability of the project. II. System Overview

a. PG&E Electrical Distribution System There are a total of six circuits that serve approximately 3,300 customers in Pebble Beach. Refer to Exhibit A for a map of Pebble Beach Electrical Distribution System.

CIRCUIT

Viejo 2201 21 KV

Viejo 2202 21 KV

Viejo 2201 4 KV

Viejo 2202 4 KV

Carmel 402 4 KV

Pacific Grove 422 4 KV A 60 Kilovolt (KV) transmission line supplies the Viejo Substation, which is located outside of Pebble Beach near the Community Hospital of Monterey Peninsula. The Viejo Substation supplies 3-21 KV distribution lines. The first 21 KV distribution line, Viejo 2201 21 KV, crosses Highway 68 and enters Pebble Beach near Scenic Drive and traverses through the neighborhood along Sunridge Road, thereafter follows Ronda Road to Spruance Road, and then along Lopez Road until it terminates at the Forest Stepdown located on Lopez Road between Forest Lake Reservoir and the Pebble Beach Community Services District office. Viejo 2201 21 KV also splits near Ronda Road and Atajo Way and continues southbound to Midwood Lane, then to Del Ciervo and on to Crespi Lane where it terminates at Crespi Stepdown on Crespi Lane near 17 Mile Drive.

Undergrounding Overhead Utilities Feasibility Study October 2010

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The second 21 KV distribution line, Viejo 2202 21 KV, was constructed in heavily forested area northbound along the east side of Highway 68 within Monterey, crosses Highway 68 near Presidio Boulevard in Pacific Grove, traverses through Del Monte Park to David Avenue, and enters Pebble Beach near David Avenue and Congress Avenue. Once in Pebble Beach, Viejo 2202 21 KV continues southwesterly and terminates at the Forest Stepdown. Viejo 2201 21 KV and Viejo 2202 21 KV create a loop such that the Forest Stepdown can be supplied by the Viejo Substation through either circuit. During normal operations, a switch on Viejo 2201 21 KV downstream of the Forest Stepdown is normally open; therefore, Viejo 2202 21 KV is the main supply and serves the majority of customers in Pebble Beach. The third 21 KV distribution line remains outside of Pebble Beach and supplies the Carmel Substation, which is located in Carmel-by-the-Sea. The Crespi 402 4 KV circuit departs the Carmel Substation and enters Pebble Beach near 17 Mile Drive and Carmel Way, and continues on 17 Mile Drive to the Crespi Stepdown. The Carmel 402 can be supplied by both Carmel Substation and Viejo 2201 21 KV via the Crespi Stepdown. During normal operations, a switch on Carmel 402 downstream of Crespi Stepdown is normally open; therefore, the Carmel 402 serves a very small area of customers in the southeastern area of Pebble Beach. The Viejo 2202 4 KV circuit departs the Forest Stepdown southbound along Forest Lake Road and supplies the southwestern part of Pebble Beach. The Viejo 2201 4 KV circuit departs the Crespi Stepdown westbound along 17 Mile Drive and supplies the Pebble Beach Lodge area. The Pacific Grove 422 4 KV circuit is supplied by the Pacific Grove Substation, which is supplied by the Del Monte Substation located in Seaside. The Pacific Grove 422 serves a small number of customers in the northwestern part of Pebble Beach. Over the last 14 years, PG&E has made significant efforts, totaling $250,000, to install Supervisory Control and Data Acquisition (SCADA) switches, SCADA re-closures, and other automated protection in the system. Despite these efforts, the number of outages and the duration of the outages have not improved; however, the number of services affected by each outage has reduced. PG&E indicated there have been 74 faults (outages) on the 21 KV circuits and 88 faults on the 4 KV circuits – a total of 162 faults in the last five years, with the most faults occurring on Viejo

Undergrounding Overhead Utilities Feasibility Study October 2010

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2202 4 KV circuit. Refer to Exhibit B for a schematic map showing outage locations. These faults are a significant nuisance for residents because Pebble Beach is essentially “at the end of the line” and often experiences outages for a longer duration than the surrounding areas.

b. Comcast Cable TV System

Comcast’s major problems occur when there is an electric outage. Comcast requires a power supply to run their active equipment. When electric power is interrupted, their system transfers power from the PG&E electrical system to a local battery back-up system. Once the batteries discharge, the cable system goes down. Comcast has the ability to run their back-up power supplies for an extended period of time by connecting them to portable gas generators. This is only practical for isolated areas, and not for a system-wide outage. With the advent of internet and phone services provided by Comcast, it is imperative that the cable system be kept operational to ensure emergency response services.

The overhead cable lines are supported by a steel strand, which has a high tensile strength. This gives Comcast some protection from falling tree limbs, but when entire trees fall on the cables, it is more likely to cause an outage.

c. AT&T Phone System

The AT&T phone system also has a dependency on commercial power. The fiber terminal pedestals and climate controlled facilities (environmental vaults) all rely on power from PG&E. They are equipped with 8 hours of back-up battery power. For extended outages, AT&T will bring in portable power generation equipment to maintain their operation.

AT&T has stated that their system is not as vulnerable to widespread area outages because they have multiple entry points, some of which are already underground.

AT&T has also stated that its system is heavily impacted by damage due to falling trees during storms. Branches that would fall across the cables would not normally take the phone system down, as the cable is supported by steel strand (which is rated for 25,000 pounds). However, when entire trees come down, the result is often downed cables or poles, causing outages.

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III. Field Investigation and Analysis RGA acquired schematic maps and five year outage history from PG&E for Pebble Beach. RGA performed a walking field study of the forest to assess the distribution system and terrain conditions. It was noted that there are areas that would benefit from the installation of tree wire conductor as an alternative to undergrounding. These were heavy tree populated areas, specifically in the line of the conductor. Tree wire is more resistant to breaks and short circuiting from tree limbs versus a non-insulated conductor. The conductor is coated with High Density Polyethylene. The following areas were identified to benefit from tree wire: Drake Road, Madre Lane, Cabrillo Drive, portion of 17 Mile Drive, Indian Village Road, Wildcat Canyon Road, Club Road, Sloat Road, Arroyo Drive, Portola Road, Sombria Lane, Pardre Lane, Riata Road, Ondulado Road, Padre Lane, Alva Lane, Cortez Road, Ronda Road and Viscaino Road. Using PG&E maps, information provided by utilities and PBCSD, and field investigations, RGA identified the following sections of overhead distribution lines that would benefit from undergrounding, which would improve reliability of the circuits. IV. Recommendations It is our recommendation that the prioritization of the areas to underground first should be based on the vulnerability of the electric system. By themselves, the cable and phone systems seem robust, and their reliability is mostly susceptible to electrical outages. Therefore, improvements made to improve electric system reliability will also improve the communications system reliability.

a. First Priority - Congress Road and Colton Road

The existing Viejo 2202 21 KV circuit, originating at the Viejo Substation, is extremely vulnerable to falling trees and limbs during storms. This is a vital circuit, as it supplies a much larger area downstream and will affect the greatest number of customers. It is recommended that the Viejo 2202 21 KV circuit is the highest priority for converting to underground utilities. Since it is likely unfeasible to underground outside of PBCSD boundary, it is recommended that undergrounding begin in Pebble Beach at Congress Road, near David Avenue of Pacific Grove, trenching south on Congress Road for 900 Linear Feet (LF), then west on Colton Road, continuing on Colton Road for 1,500 LF. Furthermore, the Pacific Grove 422 4 KV line is located on the same poles as Viejo 2202 21 KV and Pebble Beach will get the added benefit of undergrounding Pacific Grove 422 at the same time

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since, on its own, Pacific Grove 422 is not a high priority project due to the small number of services on its circuit. Also, there are some existing underground facilities in this area, and detailed PG&E maps will need to be obtained to confirm those locations for possible incorporation into the new system. Undergrounding utilities in this area poses a minimum amount of obstacles and is not considered difficult to construct. Four hundred homes are affected by outages in this area. It is estimated that it would cost approximately $770,000 ($320 per LF) to underground this area. The price per foot includes undergrounding services. Refer to Exhibit C for the Joint Trench Construction Cost Estimate.

b. Second Priority - Colton Road at Arroyo Drive to Forest Substation The second priority project extends the conversion of Viejo 2202 21 KV and Pacific Grove 422 4 KV circuits to underground facilities. The project would continue from Colton Road at Arroyo Drive to the Forest Stepdown for approximately 3,000 LF. The existing lines cross PBCSD’s Forest Lake Reservoir property. This project is estimated to cost approximately $600,000 ($200 per LF) to construct. Refer to Exhibit D for the Joint Trench Construction Cost Estimate. c. Third Priority - Drake Road Drake Road experiences the highest number of outages in Pebble Beach and is recommended as the third priority project. The existing Viejo 2202 4 KV line on Drake Road should be converted to underground facilities beginning at Forest Lake Road and continuing on Drake Road to Sombria Lane for approximately 3,200 LF. Undergrounding this portion would increase reliability for 200 homes and significantly decrease the number of outages. This area is not considered difficult to construct and is estimated to cost approximately $630,000 ($200 per LF) to construct. Refer to Exhibit E for the Joint Trench Construction Cost Estimate. d. Fourth Priority - Forest Lake Road The fourth priority project extends undergrounding Viejo 2202 4 KV along Forest Lake Road from Drake Road to Stevenson Drive for approximately 2,100 LF. By continuing to underground the rest of the Viejo 2202 4 KV in this area, it will create continuity within the distribution system. Construction is estimated to cost approximately $735,000 ($350 per LF) due to the high number of homes/services that need to be undergrounded.

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e. Fifth Priority - Ondulado Road The fifth priority project extends undergrounding Viejo 2202 4 KV along Ondulado Road from Forest Lake Road/Stevenson Drive to Padre Lane for approximately 3,200 LF. Construction is estimated to cost approximately $1,120,000 ($350 per LF).

With approximately 34 miles of overhead utilities in Pebble Beach, construction is estimated to cost approximately $61.8 Million to underground the entire community. However, this does not take into consideration areas that have already been converted to underground facilities, as well as areas that would have a lower cost (less than $350 per LF) due to no service connections. These estimates of construction costs do not include ITCC Tax (Income Tax Component of Contributions), which is collected by PG&E. It is our understanding that PBCSD would be exempt from this tax, as long as the following applies:

“Exemption is granted to a governmental agency for Rule 20B projects as long as the work is not for the provision of new service; the money for the work is coming from the governmental agency; and the work is for the public good or safety.”

Due to unforeseeable geological conditions in the field, a geotechnical investigation may need to be performed to determine the location of rock. If rock is found, it will increase the price per LF of trench by approximately $100. Refer to Exhibit F for PG&E’s Greenbook standard for underground electric service conversions. V. Overview of Construction Process The construction process begins with an Overhead to Underground Conversion Rule 20B application filed with PG&E. Generally, PG&E performs the electrical design work, which they require a deposit before they begin design work. The electric design will take PG&E approximately 10 to 12 months to complete for a $1,000,000 project. Scheduling needs to be verified with the utility. A utility consultant, such as RGA, will design a joint trench composite, which will be sent to AT&T and Comcast to request their designs for incorporation into the joint trench composite. The composite design shows the trench route and boxes of all parties and must be approved by PG&E. This drawing is used by the joint trench contractor to build the substructures for the project. This design will be the responsibility of PBCSD. The utility consultant will also submit the “Form B” document to PG&E that informs them of the percentages and values of the trench that each party has in the trench. The utility consultant will prepare a bid

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package, which includes all material lists and job instructions, to be sent to several contractors for bid proposals. Once PG&E’s design is complete, a PG&E contract will be issued for signature and payment by PBCSD. This contract should be reviewed by the utility consultant for accuracy of tariff application. After a joint trench contractor has been awarded the project by PBCSD, a pre-construction meeting will be held with PG&E, AT&T, Comcast representatives/ inspectors and the joint trench contractor. A pre-construction meeting will ensure coordination of all utilities involved in the project. The joint trench contractor will install PG&E substructures. Once PG&E approves the work, PG&E will do the electric distribution work and top the poles. The joint trench contractor will install AT&T phone conduit and substructures. Comcast will supply and install their conduit in the trench and install substructures for their system. Once AT&T and Comcast have removed their utility from the poles, PG&E can remove them. If there are service conversions, an electrical contractor will need to do the conversion of the panel from overhead to underground with inspection by the county. The complete construction process will take approximately 18 months.

PEBBLE BEACH COMMUNITY SERVICES DISTRICT

CARMEL-BY-THE-SEA

PACIFIC GROVE

MONTEREY

PEBBLE BEACHELECTRICAL DISTRIBUTION SYSTEM

Ü17

MIL

E DR

IVE

FOREST LODGE ROAD

FORESTLAKE

POPPY HILLS GOLF COURSE

PBCSDOFFICE

SPYGLASS

PEBBLE

BEACH

GOLF

LINKS

CYPRESS POINT

MPCCSHORE

COURSE

MPCC DUNES COURSE

LINKS AT

POINTJOE

17 MILE DRIVE

SPANISH BAY ROAD

STEVENSON DRIVE

BIRDROCK

BIRD ROCK ROAD

17 M

ILE

DRIV

E

HILLGOLF

COURSE

INDIANVILLAGE

CYPRESSPOINT

FORE

ST L

AKE

ROAD

LOPEZ ROAD

VISCAINO ROAD

RIP VAN WINKLEOPEN SPACE

BIRD ROCK ROAD

STEVENSON D

RIVE

DRAKE ROAD

PORTOLA ROAD

ONDULADO ROAD

STEVENSON DRIVE

SPRUANCE ROAD

EQUESTRIANCENTER

STILLWATERCOVE

PESCADEROPOINT

ARROWHEADPOINT

SUNSETPOINT

17 MILE DRIVE

PADRE LANE

SOMBRIA LANE

PORTOLA ROAD

GOLF LINKS

CYPRESS DRIVE

SPANISH BAY

SFB MORSEBOTANICAL RESERVE

LOPE

Z R

OA

D

17 MILE DRIVEDEL CIERVO ROAD

17 M

ILE

DRIV

E

RONDA ROAD

SUNRIDGE ROAD

HIGHWAY 68

COST

ANIL

LA W

AY

MID

WO

OD

LA

NE

17 MILE DRIVE

CRESPI LANE

TO CARMELSUBSTATION

TO PACIFIC GROVESUBSTATION

TO VIEJO

SUBSTATION

VIEJO 220121 KV CIRCUIT

VIEJO 220221 KV LINE

CARMEL 4024 KV CIRCUIT

PACIFIC GROVE 4224 KV CIRCUIT

SWITCH NORMALLY OPENCLOSE TO BACK-FEED FROM VIEJO 2201

AREA SERVED BYVIEJO 2202 CIRCUIT

AREA SERVED BYVIEJO 2201 CIRCUIT

VIEJO 22024 KV CIRCUIT

FOREST STEPDOWN

CONGRESS ROAD

VIEJO 22014 KV CIRCUIT

CRESPI STEPDOWN

DRAKE ROADPRIORITY

SWITCH NORMALLY OPENCLOSE TO BACK-FEED

FROM VIEJO 2201

cbaca

Text Box

NOTE: 1) Items highlighted with Orange are remotely operable via SCADA 2) Items highlighted with Green are Normally Open 3) Items highlighted with Yellow have operated to isolate a fault within the last 5 years. Red numbers indicate how many faults.