This shot was taken from the hillside just above the highway near the site of Bridge 58A. Bridge 57A would have been just to the right of light colored  earth near the center of the shot. Bridge 57B would have been visible in this shot below the light colored earth. The closest shot to this in "The RGS Story" Volume IV would be the snow shot on page 400. You should be able to line up some of the features such as the bare soil above the upper grade. Photo by Dave Dye on June 4, 2005.