Robert Swanson's photos with the keyword: plaque

Plaque identifying the boundary between Airzona and Nevada half-way across the Pat Tillman Memorial Bridge at Hoover Dam. The fence on the bridge walkway appears only as a shadow. Image processed with GIMP.

Most of Hoover Dam is concrete, and more concrete. However, the designers added some architectural details, all in Art Deco style. Image processed with GIMP.

The entrance is made up of a huge wall of rock cemented together. This used to be the main entrance, but the road bypasses it now. Image taken with the Panasonic GX85 and processed with GIMP.