Close up of East Portal Moffat Tunnel, Denver & Salt Lake Railroad Tunnel through Continental Divide, Gilpin County, Colorado; shows tunnel entrance and ventilating plant, railroad tracks, power lines, "No Trespassing" sign above white rocks placed...
Denver and Salt Lake Railway Company--1920-1930.; Railroad tunnels--Colorado--Gilpin County--1920-1930.; Gilpin County (Colo.)--1920-1930.; Moffat Tunnel (Colo.)--1920-1930.; Railroad tracks--Colorado--Gilpin County--1920-1930.
[between 1927 and 1928]
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