Public domain
Tennessee Valley Authority. Railroad crews at Watts Bar Dam. A combination of long mechanical experience, practical railroad training and common sense is required for the job of running one of the big "hogs," or locomotives. This engineer handles a train which hauls materials for the building of TVA
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit lineTennessee Valley Authority. Railroad crews at Watts Bar Dam. A combination of long mechanical experience, practical railroad training and common sense is required for the job of running one of the big. 1942-01-01. Palmer, Alfred T., United States. Office Of War Information. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.