Public domain
Timbered tunnel leading into mine. San Juan County, Colorado. Barren mountain sides attest to the amounts of timber which was used in construction of such tunnels as this
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit lineTimbered tunnel leading into mine. San Juan County, Colorado. Barren mountain sides attest to the amounts of timber which was used in construction of such tunnels as this. 1940-01-01. Lee, Russell. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.