Photographer's notes: "Aerial view, the pedestrian walkway "switchbacks" up to informational/historical displays and the pedestrian walkway on the bridge can be seen from the lower left of the frame moving across the bridge. April 10, 2012." Site Name: Mike O'Callaghan-Pat Tillman Memorial Bridge

Photographer's notes: "Aerial view, April 10, 2012. Note: I was commissioned to photograph over the bridge and dam in April 2012, more than a year after my project was complete." Site Name: Mike O'Callaghan-Pat Tillman Memorial Bridge

Photographer's notes: "Evening view of the Arizona arch segment from the dam. Transmission towers between the dam and bridge support power lines coming from the powerhouse out of the canyon." Site Name: Mike O'Callaghan-Pat Tillman Memorial Bridge

Photographer's notes: "A high line crane system, which ran between the Arizona and Nevada sides of the canyon, was used to transport materials and workers during the bridge's construction." Site Name: Mike O'Callaghan-Pat Tillman Memorial Bridge

Photographer's notes: "Ironworkers in Manbaskets, April 29, 2009 - Ironworkers were transported in manbaskets via a high line crane system to the end of the Arizona arch segment." Site Name: Mike O'Callaghan-Pat Tillman Memorial Bridge

Photographer's notes: "During construction, drivers saw this view as they rounded the Nevada hairpin turn of the old highway. Note: This is one of the few hand held nighttime photographs and the only one taken from a car while in motion. At the time, I did not have permission to stop and photograph from this location." 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