Hetch Hetchy Valley is a glacial valley in Yosemite currently completely flooded by O'Shaughnessy Dam, forming the Hetch Hetchy Reservoir. The Tuolumne River fills the reservoir. Wapama Falls is visible across the water.
Hetch Hetchy Valley is a glacial valley in Yosemite currently completely flooded by O'Shaughnessy Dam, forming the Hetch Hetchy Reservoir. The Tuolumne River fills the reservoir. Wapama Falls is visible across the water.