BNSF 519 and another BNSF Heritage 2 B40-8W sit on the house track in Longmont, CO. BNSF 519 is one of only a few BNSF Warbonnet units to wear the distorted BNSF Patch on the longhood.
BNSF 519 serves as the lead unit on a ballast train that is shoving back on the new main to deliver ballast to the section of the track that had not received it yet.