Electro-Motive Division, along with Union Pacific, did some high-altitude testing of EMD’s SD90MAC-Hs at aptly-named Plainview, Colorado, in February 1998. Here, UP Nos. 8503, 8502 and 8505, along with specially-painted EMD No. 8504, splice the EMD test car at Plain siding on Union Pacific’s Moffat Tunnel Subdivision.
