A trio of SD70-series units (two SD70MACs and an SD70ACe) bring up the rear of this southbound coal load on the Joint Line (Main One) south of Castle Rock. The SD70MACs are DPU units controlled by the head end, while the SD70ACe is a manned unit that was added at Big Lift (just south of Denver). The extra unit will help push up to Palmer Lake, and then cut off and return to Big Lift.
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