How will hydropower generation be affected if the valley is restored?
San Francisco would still be able to produce energy using at least two of its three powerhouses. The system’s average annual output would decline by 20-40% depending on whether or not Kirkwood powerhouse can be modified to operate without O’Shaughnessy Dam. Generation would fall by about one third at Moccasin powerhouse, while Holm powerhouse would not be affected. In all but the driest years the system would still produce enough energy to meet San Francisco’s current public sector needs, but less electricity would be available for sale to the Turlock and Modesto Irrigation Districts and others.
