Cal-ISO totally changes tune on power plants

Pub date June 3, 2008
SectionPolitics Blog

Oh my. For all you folks that have been following the controversy around building new power plants in San Francisco, it just got even better.

Mayor Gavin Newsom sent a letter to the Board of Supervisors today outlining a “more promising way forward than the current proposal” to build two natural gas-burning “peaking” power plants in the city.

The way forward: retrofit three existing diesel turbines at the Mirant-Potrero Power Plant, while at the same time shutting down Unit 3, the most polluting part of the power plant, as soon as the Transbay Cable comes online.

“On Friday, May 23, Ed Harrington [General Manager of the SFPUC], City Attorney Dennis Herrera and I met with president of Cal-ISO – Yakout Mansour, the chairman of the CPUC – Mike Peevey, the CEO of Mirant – Ed Muller, the CEO of PG&E – Bill Morrow, and our respective staffs. In this meeting we vetted the possibility of retrofitting the diesel turbines [currently owned and operated by Mirant] and asked each stakeholder to give us the necessary commitments to advance this alternative,” Newsom wrote to the Board.

For anyone who’s been closely following the nuances of this argument, this is a significant change in position from the California Independent System Operator [Cal-ISO], and it should be noted that it took — not just the Mayor sitting down at the table — but top dogs from PG&E and Mirant (who both stand to lose money by the city building its own power plants), as well as the CPUC’s Peevey, who’s never expressed a positive opinion about the true need for more power plants in the city.

Now, suddenly, Cal-ISO is departing significantly from all previously expressed demands that we build power plants.

The background: The state, through Cal-ISO, has for the last several years insisted that San Francisco needs 150 megawatts of peak electricity at the ready. We currently get this from Mirant-Potrero, but Unit 3 of that facility has a bad rep as the greatest single source of pollution in the city. People in the Bayview neighborhood, which have carried more of their fair share of pollution, have been waiting a long time for the plant to close. Stakeholders have been meeting for over seven years, working on ways to close the plant, and much of the leadership on the issue has come from Sup. Sophie Maxwell, who represents the Bayview district.

Cal-ISO has insisted that the only way to close Unit 3 is to build new peakers, which would be owned and operated by the city, run cleaner and more efficiently, and still supply that 150 MW of peak power. Even when the 400 MW Transbay Cable was approved, Cal-ISO insisted San Francisco would still need the peakers.

But in a June 2 letter, Cal-ISO suddenly had a different response for the Mayor.