Timeline of Hetch Hetchy water and power system (1850-1906)

1850 – 1906: A growing city needs a reliable water supply


1899- US Geological Survey

recommends Tuolumne river as water source

Hetch Hetchy Valley before Damning


1906- San Francisco earthquake and fire

1906 earthquake (SFPUC)


1906-1913: Securing water rights in the high Sierra

(click to see more)


(Source: SFPUC)

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