Inside the 27 foot diameter penstock that drops water 1,665 feet between Sierra Nevada lakes. Helms Pumped Storage Project cost $400 million and provides peak power then pumps water back uphill in the slack time. It is the partner facility to Diablo Canyon Nuclear Power Plant.
August 22, 1980
PG&E photo
Inside the 27 foot diameter penstock that drops water 1,665 feet between Sierra Nevada lakes. Helms Pumped Storage Project cost $400 million and provides peak power then pumps water back uphill in the slack time. It is the partner facility to Diablo Canyon Nuclear Power Plant. August 22, 1980 PG&E photo
Inside the 27 foot diameter penstock that drops water 1,665 feet between Sierra Nevada lakes. Helms Pumped Storage Project cost $400 million and provides peak power then pumps water back uphill in the slack time. It is the partner facility to Diablo Canyon Nuclear Power Plant. August 22, 1980 PG&E photo