Nice archive shot from 1947 of what appears to be electric trolley being used on the Skagit River Hydroelectric Project. The photo was posted by Seattle City Light on Flickr; one of the best parts of the Internet lately has been Creative Commons, which allows shots like this to be viewed by a new generation of rail fans. Some more experienced readers here may know where to find info about this car, but my search came up empty!
I love these old photos; black & white has so much emotion, oddly enough, even in the absence of color. For a current color picture of a more famous unit, check out "Old Number 6" in Newhalem:
http://www.railpixonline.com/SCL_6.htmTo find out more about the project visit here:
http://en.wikipedia.org/wiki/Ross_DamPhoto courtesy of Seattle Municipal Archives