Two systems of coal mine transportation in 1915 at the Cle Elum mines were trains operated by electric engines and the old fashion yet very reliable work mules.
"Two Systems of Transportation" (1915). Roslyn African American History Photographs. 21.
Spatial Coverage (for ex: Ellensburg, WA)
Washington (State) - Kittitas County - Roslyn
Ellensburg Public Library
Cle Elum, Washington, Kittitas County (Wash.) - History, Coal mining, Mules