Photographer's notes: "A view from the Nevada side bridge deck toward the Arizona wall of the Black Canyon shows the complexity of the construction process, 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 side arch foundation looking across toward Arizona, evening, May 20, 2009." Site Name: Mike O'Callaghan-Pat Tillman Memorial Bridge
Photographer's notes: "Detail of scaffolding steps near the hairpin turn on the Nevada side, May 20, 2009." Site Name: Mike O'Callaghan-Pat Tillman Memorial Bridge
Photographer's notes: "A solitary worker departs the construction site to the Nevada side of the canyon." 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."