Hydro Power

Serial Information: Civil Engineering—ASCE, 1984, Vol. 54, Issue 7, Pg. 58-59

Document Type: Feature article


The Kerckhoff 2 Hydroelectric Power Projects adds 140 MW to the capacity of the San Francisco area's Pacific Gas & Electric system. No new dam was needed; only a 4-mile long tunnel and a powerhouse. A custom-designed tunnel boring machine saved about &2214 million because the bored rock walls were so smooth and rock integrity good enough that a concrete lining was not needed. The power house was placed underground in an excavated cylindrical rock chamber with a domed ceiling. This configuration reduced excavation and reduced rockbolting and stuctural reinforced concrete. An Outstanding Civil Engineering Achievement nominee.

Subject Headings: Rocks | Hydro power | Electric power | Electrical systems | Tunnels | Excavation | Reinforced concrete | Dams

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