2023-02-072023-02-071917https://hdl.handle.net/11124/16347Scale not given.Blueline copy.28 x 26 cmmine mapsengNo Known Copyright: http://rightsstatements.org/vocab/NKC/1.0/.Mines and mineral resources -- Colorado -- Pitkin County -- MapsTraynor Tunnel, Sur. Aug. 18, 1917StillImage