(Tablet 1)
O'Shaughnessy Dam
1915-1922
City and County of San Francisco.
James Rolph Jr. Mayor
· Foundation Elev. 3388 · Bottom Valves Elev. 3508 · Initial Crest Elev. 3726 · Length of Crest 600· Storage Cap'y Gals. 66,000,000,000 · Drainage Area Acres 294,000 · Reservoir Area Acres 1590· Concrete Volume Cu. Yds. 390,000
M.M. O'Shaugnessy, Engineer
Utah Construction Co. Contr's.
(Tablet 2)
Structure Completed 1938 · Height Increased 68 Feet· Federal Emergency Administration of Public Works · Project No. 1429
Angelo J. Rossi, Mayor
Public Utilities Commission
· Lewis F. Byington, President · George Filmer, Vice President · John H. McCallum, Commissioner · John P. Murphy, Commissioner · John P. McLaughlin, Commissioner · EDW. G. Cahill, Mgr. of Utilities · M.M. O'Shaughnessy, Engineer, Design · L.T. McAfee, Engineer, Construction · Transbay Construction Co., Contractor
· Height Above Stream Bed, Ft. 312 · Height Above Foundation, Ft. 426 · Crest Elev. Ft. 3,812 · Crest Length, Ft. 900 · Storage Cap'y, Gals. 117,300,000,000· Watershed Area. Sq. Mi. 459 · Reservoir Area, Acres 1,972 · Concrete Volume. Cu. Yds. 675,000
(Tablet 3)
Canyon Power Tunnel
1962-1964
George Christopher, Mayor
Public Utilities Commission
· Stuart n. Greenberg, President · Thos. P. White, Vice Pres. · Thos. F. Stack · George F. Hansen · Bert Simon
Robert C. Kirkwood, Manager of Utilities
Oral L. Moore, General Manager Hetch Hetchy Water Supply
Length: O'Shaughnessy Dam to early intake - 10.1 miles
Dimensions: 14'-0" by 14'-6" Horseshoe
Capacity: 850 Cubic Feet Per Second
(Tablet 4)
75th Anniversary of the Completion of the O'Shaughnessy Dam
July 11, 1998
Hetch Hetchy Water and Power
and in recognition of the contributions of
Hetch Hetchy Water & Power Personnel
Tuolumne County, The U.S. Forest Service
The National Park Service
City and County of San Francisco
Willie L. Brown, Jr., Mayor
San Francisco Public Utilities Commission
· Victor G. Makras, President · Ann Moller Caen, Vice President, E. Denis Normandy, Commissioner · Robert K. Werbe, Commissioner · Frank L. Cook, commissioner
Anson B. Moran, General Manager SFPUC
Lawrence T. Klein, General Manager, HW&P
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