Bloomer cut On likely the first run to the west coast, brand-new Union Pacific SD70ACe No. 8714 leads a train through Bloomer cut between Newcastle and Auburn, California, on March 8, 2012. This narrow cut is part of on the original Central Pacific right-of-way over Donner Pass. Too bad the spotless ACe has what’s left of a deer or cow on the right side of the pilot.