Shoshone Dam near the entrance to Yellowstone Park, Wyoming.

Canyon below Shoshone Dam, Wyoming.

Shoshone Dam on Colorado River above Glenwood Springs.

Little Dell dam in Parley's Canyon is a source for Salt Lake City water supply.

Dix Dam, completed in 1927, was constructed across the Dix River three miles upstream from its confluence with the Kentucky River. It was the world's largest stone-filled dam.

Powerhouse for Dix Dam, completed in 1927, was constructed across the Dix River three miles upstream from its confluence with the Kentucky River. It was the world's largest stone-filled dam.

Croton Dam in Muskegon, Newaygo County, Michigan.

Powerhouse for Dix Dam, completed in 1927, was constructed across the Dix River three miles upstream from its confluence with the Kentucky River. It was the world's largest stone-filled dam.

Dix Dam, completed in 1927, was constructed across the Dix River three miles upstream from its confluence with the Kentucky River. It was the world's largest stone-filled dam.

Powerhouse for Dix Dam, completed in 1927, was constructed across the Dix River three miles upstream from its confluence with the Kentucky River. It was the world's largest stone-filled dam.

Dix Dam, completed in 1927, was constructed across the Dix River three miles upstream from its confluence with the Kentucky River. It was the world's largest stone-filled dam.

Dam north of Noblesville, Indiana.