Overview of the Hetch Hetchy Water System

What is the water source that provides drinking water to 2.5 million Bay Area residents?

Timeline of Hetch Hetchy water and power system (2006-2030)

  2006 – 2030: Today and beyond   – Hetch Hetchy system provides high-quality drinking water to 2.5 million Bay Area residents; 85% of water comes from High Sierra -Hetch Hetchy hydropower delivers about 1.7 [...]

Timeline of Hetch Hetchy water and power system (1935-2005)

1935-2005: Expanding and improving the Hetch Hetchy system   1930′s-1970′s- Additional San Joaquin and Bay Division pipelines completed 2002- Voters approve bond measure to rehabilitate water system 2006-2030: Today and beyond (click to see more) [...]

Timeline of Hetch Hetchy water and power system (1914-1934)

1914-1934: Building the Hetch Hetchy system   1919-1923- Hetch Hetchy Reservoir built 1921-1925- Moccasin Powerhouse, tunnel and penstocks built 1930- San Francisco purchases Spring Valley Water Co. for $40 million 1934- First Hetch Hetchy water [...]

Timeline of Hetch Hetchy water and power system (1906-1913)

1906 – 1913: Securing water rights in the high Sierra   1910- San Francisco voters pass $45 million bond measure to build water system 1912- Preliminary design for Hetch Hetchy system; Michael O’Shaughnessy hired as [...]