PHOENIX, AZ.- From the moment photographer Jamey Stillings first encountered the bridge at Hoover Dam he knew it was a subject he couldn’t ignore. Over the next two years, he visited the bridge 16 times documenting the progress and completion of the enormous structure that would eventually span the Colorado River . The resulting photo essay is the focus of a new exhibition opening at Phoenix Art Museum on August 13, 2011. The Bridge at Hoover Dam: Photographs by Jamey Stillings features more than 40 large format color photographs chronicling the creation of North America ’s longest single-span concrete arch bridge. Officially named the Mike O’Callaghan-Pat Tillman Memorial Bridge, the bridge is located roughly 1500 feet downstream of Hoover dam and is the central portion of the Hoover Dam Bypass project. Construction began in 2004 and was completed in 2010. The 1,905 foot long bridge spans the Black Canyon