Interior of Wilson Dam at Muscle Shoals, Alabama.

Interior of Wilson Dam at Muscle Shoals, Alabama.

Wilson Dam at Muscle Shoals, Alabama.

Wilson Dam at Muscle Shoals, Alabama.

Construction and equipment on the Hoover Dam.

Roosevelt Dam in Arizona.

Roosevelt Dam is on the Salt River, northeast of Phoenix, Arizona. Construction began in 1903 and was completed in 1911. It was officially named after Theodore Roosevelt in 1959, and became a historic landmark in 1963. 16mm film shot by D.J. Angus…

Roosevelt Dam is on the Salt River, northeast of Phoenix, Arizona. Construction began in 1903 and was completed in 1911. It was officially named after Theodore Roosevelt in 1959, and became a historic landmark in 1963. 16mm film shot by D.J. Angus…

Beaver dam in Colorado.

Shoshone Dam on Colorado River above Glenwood Springs.

Aftermath of 1913 flood at Williams Dam.

White River above Williams Dam in 1913 flood.