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historicalmarkerproject/markers/HMLO_producing-clean-renewable-energy_Groveland-CA.html
Every year the Hetch Hetchy Water and Power System produces 1.7 billion kilowatt-hours of clean renewable hydropower - equivalent to the power generated from burning 39 million gallons of oil.
Early Intake Powerhouse was built in 1918, twelve m…
historicalmarkerproject/markers/HMLN_hetch-hetchy-reservoir-and-o-shaughnessy-dam_Groveland-CA.html
The great 1906 San Francisco earthquake destroyed key portions of the City of San Francisco's water system. The three days of unquenchable fires that followed the quake claimed more than four square miles of land, thousands of buildings and an unt…
historicalmarkerproject/markers/HML6_o-shaughnessy-dam_Groveland-CA.html
(Tablet 1)O'Shaughnessy Dam1915-1922 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 …