Live Railroad Radio Scanner Audio from BNSF's Gateway Subdivision, Plumas County, CA. The Gateway Sub. stream's main focus is monitoring the BNSF Road channel (AAR channel 66/66; 161.100 Mhz) in the lower portion of the Highline. The stream radio is located near Crescent Mills. BNSF DS radios from Keddie to Halls Flat can be heard.