Burlington Northern SD40-2 Number 6917, built November 1973; SD40-2 Number 6918, built November 1973; two SD40-2, numbers unknown; near Fergus Falls, Minnesota with open hoppers on December 25, 1981. Photo by Al Christianson.

Burlington Northern SD40-2 Number 6917, built November 1973; SD40-2 Number 6918, built November 1973; two SD40-2, numbers unknown; near Fergus Falls, Minnesota with empty open hoppers on December 25, 1981. Photo by Al Christianson.

Burlington Northern SD40-2 Number 6928, built November 1973; GP20 Number 2015, former Great Northern Number 2015; SD9 , number unknown; near Barnesville, Minnesota with mixed freight on February 20, 1982. Photo by Al Christianson.

Burlington Northern SD40-2 Number 6928 with LOCOTROL antennas, built November 1973; GP20 Number 2015, former Great Northern Number 2015; near Barnesville, Minnesota on February 20, 1982. Photo by Al Christianson.

Burlington Northern SD40-2 Number 6928, built November 1973; GP20 Number 2015, former Great Northern Number 2015; SD9 , number unknown; near Barnesville, Minnesota with mixed freight on February 20, 1982. Photo by Al Christianson.

Burlington Northern SD40-2 Number 6928, built November 1973; GP20 Number 2015, former Great Northern Number 2015; SD9 , number unknown; at Moorhead, Minnesota with mixed freight on February 20, 1982. Second car behind power is former Northern Pacific 40 foot combination door boxcar. Photo by Al Christianson.

Burlington Northern SD40-2 Number 6928, built November 1973; GP20 Number 2015, former Great Northern Number 2015; SD9 , number unknown; near Rothsay, Minnesota with mixed freight on February 20, 1982. Photo by Al Christianson.

Burlington Northern SD40-2 Number 6928, built November 1973; GP20 Number 2015, former Great Northern Number 2015; SD9 , number unknown; at Milepost 17 south of Moorhead, Minnesota on Fergus Falls line with mixed freight on February 20, 1982. Second car behind power is former Northern Pacific 40 foot combination door boxcar. Photo by Al Christianson.

Burlington Northern flasher and bell crossing signal at Prosser, Washington, on June 26, 1986. This former Northern Pacific signal is in the 3rd subdivision of the Idaho division. Photo by GJ Werkema. Other subject classes: sign, crossing signal

Burlington Northern flasher and bell crossing signal at Prosser, Washington, on June 26, 1986. This former Northern Pacific signal is in the 3rd subdivision of the Idaho division. Photo by GJ Werkema. Other subject classes: sign, crossing signal