Photo By: Kevin Morgan

UP always runs the Big Boy with a diesel unit as backup, as well as to help with dynamic braking on downhill grades. This year, it was UP 1616, the Abraham Lincoln unit. Email Questions or Comments to the Webmaster. User Comments (0) No comments posted yet. Click Here to add the first one!

3 views 0 comments Thursday, July 17, 2025 at 10:10:44 AM image date Location Information City or County and State Cheyenne, WY Subdivision Laramie (UP) Milepost or Control Point CP W511 Train Information Railroad Union Pacific Model SD70M Primary Unit Number UP 1616 Paint Scheme Steam Symbol PCYDV-17 Train Type Steam Train Primary Unit Past Number(s) ex- UP 4015 Photo Information Camera Make/Model Canon / Canon EOS R6m2 ISO 250 Flash Did Not Fire Focal Length 28 mm Shutter 1/400 seconds Aperture f/7.1

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