Empire Builder Route Ideas: BNSF on Steven's Pass or Marias Pass. We need the Amtrak Empire Builder with a P42DC Genesis, a BNSF ES44AC/DC/C4 or ET44C4, GP38-2, SD40-2, and/or maybe a BNSF GP60. For a Great Northern or Burlington Northern Empire Builder route, a GN or BN F7, E7, or E8 set needs to be included. The route also needs a GN or BN SD45, SD40-2, F45, U-Boat, GE Dash-7, SW1500, etc for freight.