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Final SFSSG Report

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Summary:

San Francisco Peninsula, Phase 2, Long - Term Electric Transmission Planning Technical Study, Final Report, November 14, 2005

Extract:

At approximately 08:15:24 on the morning of December 8, 1998, the Pacific Gas and Electric Company (PG&E) experienced a severe disturbance initiated at San Mateo Substation that resulted in a blackout of most of the City of San Francisco and nearby communities on the San Francisco Peninsula. A recommendation from the California Independent System Operator (CAISO) December 8th Disturbance Report was to develop a long-term plan (five and ten-year) to reliably serve the future electric needs of the San Francisco Area. As a result, the San Francisco Stakeholder Study Group (SFSSG) was formed. This stakeholder group includes a variety of entities such as: the City and County of San Francisco (CCSF), the Pacific Gas & Electric Company (PG&E), the California Public Utility Commission (CPUC), the California Energy Commission (CEC), various generation developers, representatives of local San Francisco community groups and others. This group recommended the Jefferson-Martin 230 kV Line Project as the preferred alternative for increasing power imported to San Francisco and improving the state of reliable load serving capability. This project was approved by the CAISO and California Public Utilities Commission (CPUC) and is scheduled for operation in early 2006. With the requirement to replace old generator units within San Francisco with new and lower emission power resources within and outside of San Francisco, there became a need to identify additional transmission system reinforcements and/or established load management or distributed/renewable generation programs to fulfill the requirement of establishing a long-term (10 year) reliable load-serving plan beyond 2006. The CAISO developed an Action Plan (Revised Action Plan for San Francisco (Attachment 1)) that will allow for the release from Reliability Must-Run Contracts all generator units at the Hunters Point and Potrero Power Plants by early 2006 and 2007 respectively. That Action Plan provides for reliable load serving capability within San Francisco and the Peninsula in the near term; however technical studies show that a major project is needed to reliably serve this area’s load beginning 2012.

Document Locations:

• San Francisco Stakeholder Study Group