Photographer's notes: "Aerial view showing relationships among Hoover Dam, the original road between Arizona and Nevada, and the Hoover Dam Bypass under construction, May 22, 2009." Site Name: Mike O'Callaghan-Pat Tillman Memorial Bridge
Photographer's notes: "Arch construction as seen from cliff over looking the Nevada hairpin turn, June 29, 2009." Site Name: Mike O'Callaghan-Pat Tillman Memorial Bridge
Photographer's notes: "Arch construction as seen from cliff over looking the Nevada hairpin turn, June 29, 2009." Site Name: Mike O'Callaghan-Pat Tillman Memorial Bridge
Photographer's notes: "Arch construction view from Arizona side north of bridge, June 29, 2009." Site Name: Mike O'Callaghan-Pat Tillman Memorial Bridge
Photographer's notes: "Arch construction view from Arizona side south of bridge, June 29, 2009." Site Name: Mike O'Callaghan-Pat Tillman Memorial Bridge
Photographer's notes: "Rebar forms were fabricated on the Arizona side, then 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: "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: "This telephoto view of the Nevada side arch construction reveals the complexity of the process, 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: "Evening view of the arch segments nearing their rendezvous over the Colorado River." Site Name: Mike O'Callaghan-Pat Tillman Memorial Bridge