This wonderful image is provided courtesy of Jeannie Woehl and Tacoma Power. It looks like a single gas pump in LaGrande, Washington, probably from the 1940s while they were working on the dam. And, of course, based on the cars we can see.
If anyone has more light to shed on this image, please add a comment or two.
Click on image to enlarge.
Eatonville To Rainier 