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PG&E gets permit to build San Francisco switching station [free access]

July 1, 2020

Pacific Gas and Electric Company (PG&E) has received authorisation from the state utility regulators to build the Egert switching station near the Hunters Point neighborhood in San Francisco, California.


In particular, the California Public Utilities Commission (PUC) granted PG&E a certificate of public convenience and necessity (CPCN), authorising construction of the project and allowing expenditures of up to USD294.65 million, including USD59 million for contingencies.


The 230 kV switching station will be housed in a building on Egbert Avenue, west of Hunters Point. A new 3.1-mile (5-km), 230 kV underground transmission line will be installed from the Egbert switching station, south to Brisbane, California. The new power line will replace the existing 230 kV transmission lines now terminating at the nearby aging Martin substation on Geneva Avenue, providing a new 230 kV path around the substation to the new Egbert switching station.


The switching station will ensure reliable and uninterrupted power supply to the San Francisco city, which is presently served by only two sources—the 230 kV Martin substation and 115 kV systems from the south and Trans Bay Cable LLC's line from the east. However, if the transmission systems at the Martin substation become inoperable, the Trans Bay Cable line can only supply about 46 per cent of San Francisco's typical weekday electrical needs. The Egbert switching station is therefore needed to facilitate the transmission of 350 MW of power, which is presently delivered by the Martin substation.