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View of Rock Creek Canyon showing the Moffatt railroad grade at upper right. "This two and one half miles of railroad track with tunnels No. 45, 46, 47, 48 and the big bridge across the creek was considered the costliest piece of grade on the railroad. A high bridge across the canyon in the foreground could have eliminated all this costly construction and maintenance and such a bridge was contemplated, but steel for the structure was unobtainable...
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Entrance to the Carlton tunnel in 1932, in the snow. The Busk-Ivanhoe Tunnel was built by the Busk Tunnel Railway Company for the Colorado Midland Railroad in 1891 as a replacement for the Hagerman Tunnel at a lower, more direct route. It connected Aspen and Leadville. The tunnel was abandoned following Colorado Midland's 1897 bankruptcy and was converted to one-way auto traffic in 1922 as the Carlton Tunnel, a toll tunnel carrying then-State Highway...