A pair of DPUs, an SD70ACe and an ES44C4, push on the tail end of the westbound Denver-Provo just west of Leyden. For several years after the UP/SP merger, when BNSF first got trackage rights on the Moffat, BNSF ran manned helpers from Denver to East Portal, cutting off at East Portal and running back to Denver light. Sadly, those day are now long gone, as DPUs now rule.
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