Photographer's notes: "Aerial view looking down the canyon with the Nevada hairpin turn of the old highway in the foreground." Site Name: Mike O'Callaghan-Pat Tillman Memorial Bridge
Photographer's notes: "Ironworkers fabricate rebar forms on the Arizona side, then the forms were transported via highline crane into position for the next segment of arch construction, June 29, 2009." Site Name: Mike O'Callaghan-Pat Tillman Memorial Bridge
Photographer's notes: "Evening view downstream from the Arizona side of the Black Canyon with the old crane platform (from Hoover Dam construction) below, June 29, 2009." Site Name: Mike O'Callaghan-Pat Tillman Memorial Bridge
Photographer's notes: "Aerial view of Lake Mead, Hoover Dam, and the bridge under construction with reflection of the bridge in river below, June 30, 2009." Site Name: Mike O'Callaghan-Pat Tillman Memorial Bridge
Photographer's notes: "Aerial view of Lake Mead, Hoover Dam, and the bridge under construction with reflection of the bridge in river below, June 30, 2009." Site Name: Mike O'Callaghan-Pat Tillman Memorial Bridge
Photographer's notes: "Aerial view looking downstream of the bridge arch construction, the Nevada side hairpin turn of the old road, and the Colorado River, June 30, 2009." Site Name: Mike O'Callaghan-Pat Tillman Memorial Bridge
Photographer's notes: "Aerial view of a motor boat on Lake Mead near the mineral deposit banding that revealed the lower level of the Lake Mead reservoir, June 30, 2009." Site Name: Mike O'Callaghan-Pat Tillman Memorial Bridge
Photographer's notes: "Aerial view of bridge and the hairpin turn of the old Nevada road, June 30, 2009." Site Name: Mike O'Callaghan-Pat Tillman Memorial Bridge