Photograph of a publicity drawing depicting the Boulder Dam, [s.d.]. At center, a crecent-shaped building stands at the foot of the dam, connected to two sets of railroad tracks that run on either side of the canyon in the foreground. The dam itself is visible in the background. Note in photo sleeve reads "Copied from print furnished by the Union Pacific publicity department".; Writing appended to photo reads "Drawing made under direction of Raymond F. Walter, chief engineer of Interior Department, which, he says, is the present conception of Boulder Dam as planned. Mr. Walter states plans may be changed later but this is what engineers and advisors of Interior Department have in mind at this present time".