Plaques commemorating the original construction of the O'Shaughnessy Dam from 1915-1922 (left), increasing height in 1938 (center), and Canyon Power Tunnel from 1962-1964 (right).
Water spilling into the overflow channel at the O'Shaughnessy Dam & Hetch Hetchy Reservoir, Yosemite National Park - California
Wapama Fall, as seen from across the Hetch Hetchy Reservoir, Yosemite National Park - California
