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[ New Search ] Face of the Hetch Hetchy Dam [O'Shaughnessy Dam] Location : Hetch Hetchy, CA Agency : PWA Owner : NARA (SPB) Medium : B&W Photo Control Number : P-85 Enlarged Image Description : Saw-tooth stairs form a pattern on the face of the Hetch Hetchy Dam which supplies San Francisco with water. Listed Under: [Utilities][Waterworks][San Francisco Waterworks] [Utilities][Dams][Hetch Hetchy Dam, CA]