The Mike O’Callaghan-Pat Tillman Memorial Bridge at the Hoover Dam series depicts 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.