The Mike O’Callaghan-Pat Tillman Memorial Bridge and the Hoover Dam series depict the construction of the Mike O’Callaghan-Pat Tillman Memorial Bridge from 2009 to 2012. The photographs primarily depict workers building the bridge, including photographs of ironworkers, the arch, the temporary pylons, the arch keystone, and the piers. The photographs also depict aerial views of the bridge, the Hoover (Boulder) Dam, the Colorado River, Black Canyon, and the surrounding area.

Materials depict the construction of Boulder City, Nevada and the Hoover (Boulder) Dam from 1930 to 1935. The photographs primarily depict construction of the master planned community of Boulder City, which was built to house workers during the construction of the dam. The photographs also depict construction of the dam, surveyors working in Black Canyon and on the Colorado River, and buildings in Boulder City. The photographs also depict Williamsville, the small settlement that preceded Boulder City.