Photographer's notes: "Ironworkers arrive to work in manbasket, Arizona side of bridge arch construction, Hoover Dam Bypass Project, April 30, 2009." Site Name: Mike O'Callaghan-Pat Tillman Memorial Bridge
Photographer's notes: "Detail of highline crane system used as the main way to deliver materials for construction of the bridge, April 30, 2009." Site Name: Mike O'Callaghan-Pat Tillman Memorial Bridge
Photographer's notes: "A worker climbs up a stairwell of the Nevada side arch construction, May 20, 2009." Site Name: Mike O'Callaghan-Pat Tillman Memorial Bridge
Photographer's notes: "View from the Nevada side bridge deck down to the Nevada side arch segments and the river, May 20, 2009." Site Name: Mike O'Callaghan-Pat Tillman Memorial Bridge
Photographer's notes: "View from the Nevada bridge deck down to the Nevada side arch segments and Colorado River." Site Name: Mike O'Callaghan-Pat Tillman Memorial Bridge
Photographer's notes: "View from the Nevada bridge deck down to a Nevada side arch segment and Colorado River." Site Name: Mike O'Callaghan-Pat Tillman Memorial Bridge
Photographer's notes: "View from the Nevada side bridge deck down to the Nevada side arch segments and the river, evening, May 20, 2009." Site Name: Mike O'Callaghan-Pat Tillman Memorial Bridge
Photographer's notes: "View from the Nevada side arch foundation looking across toward Arizona, evening, May 20, 2009." Site Name: Mike O'Callaghan-Pat Tillman Memorial Bridge
Photographer's notes: "A pair of columns support the girders and bridge deck, Nevada side, evening, May 20, 2009." Site Name: Mike O'Callaghan-Pat Tillman Memorial Bridge
Photographer's notes: "Transmission towers move power lines from the powerhouse of Hoover Dam up out of Black Canyon, Arizona side near the dam, May 21, 2009."