A single DPU brings up the tail end of an eastbound MRONYX (Manifest, Roper, UT to North Yard, CO, Extra) at Shoshone in Glenwood Canyon. At 3,960 feet, the siding of Shoshone is rarely used. The east end of Shoshone is separated by the west end of Allen by only a few hundred feet (and a tunnel). Rio Grande considered connecting Allen and Shoshone to create a stretch of two main tracks, but the expense of removing the tunnel proved to be too much to make it worth it.
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