A-B-A Warbonnets A westbound BNSF freight on Union Pacific’s Moffat Subdivision has a set of A-B-A Super Fleet warbonnets just west of Rollinsville, Colorado, on February 6, 1999. General Electric C40-8W No. 829 leads EMD GP60B No. 338 along with another C40-8W No. 811, only this one has the large BNSF lettering on the flanks.