Hetch Hetcy Reservoir is part of Yosemite National park. Major water supply sources for San Francisco were destroyed during the 1906 earthquake. So in 1913, Congress passed the Raker Act which allowed the Hetch Hetchy Water project to be built in a National Park. It took 20 years for the O’Shaghnessy Dam to be built, Phase I was finished in 1923, Phase II, which added 85’ was finished in 1938.
The water flows to San Francisco via gravity. Below you can see the water coming out of an underground pipe.
This squirrel sure was making a lot of noise.
Water was beautiful.