Burlington Northern Class F45 Number 6630, built April 1971; SD40-2 Number 6833, built November 1973; SD40-2 Number 67*5; and an SD45, number unknown; at Northtown yard in Minneapolis, Minnesota on July 26, 1980. Photo by Al Christianson.

Burlington Northern Class F45 Number 6626, built April 1971; SD40 Number 6324, built November 1971; F45 Number 6625, built September 1970; SD45 Number 6571, built October 1971; at Minneapolis, Minnesota on August 10, 1981. Photo by Al Christianson.

Burlington Northern Class F45 Number 6621, built August 1970; SD40-2 Number 6808, built March 1973; an SD45, number unknown; and an SD45, number unknown; passing Hoffman Avenue interlocking at Saint Paul, Minnesota with a westbound freight on February 17 1980. Photo by Al Christianson.

Burlington Northern Class F45 Number 6617, built August 1970; SD40-2 Number 7889, built May 1979; at Minneapolis, Minnesota on November 15, 1980. Photo by Al Christianson.

Burlington Northern Class F45 Number 6617, built August 1970; SD40-2 Number 7889, built May 1979; at Minneapolis, Minnesota on November 15, 1980. Photo by Al Christianson.

Burlington Northern Class SD45 Number 6560, built December 1971; SD45 Number 6403, (former Northern Pacific Number 3603); an SD45, number unknown; and an SD40-2, number unknown; passing Hoffman Avenue interlocking at Dayton's Bluff, Minnesota with an eastbound freight on April 24, 1981. Photo by Al Christianson.

Burlington Northern Class SD45 Number 6547, built November 1971; SD45 Number 6557, built December 1971; SD40-2 Number 8147, built July 1980, and an SD40-2, number unknown; with a piggyback freight at Dilworth, Minnesota on March 14, 1981. Photo by Al Christianson.

Burlington Northern Class SD45 Number 6491, built August 1970; SD40-2 Number 6366, built November 1976; passing Newport interlocking at Newport, Minnesota on April 6, 1981. Photo by Al Christianson.

Burlington Northern Class SD45 Number 6408, (former Northern Pacific Number 3608); SD40-2 Number 6763, built November 1976; an SD40-2, number unknown; and an SD40-2, number unknown; passing Hoffman Avenue interlocking at Dayton's Bluff, Minnesota with an eastbound freight on December 4, 1980. Photo by Al Christianson.

Burlington Northern Class SDP40 Number 6394, (former Great Northern Number 320); SD45 Number 6483, built August 1970; SD40-2 Number 8130, built June 1980; at grade crossing in Breakenridge, Minnesota with a freight on March 11, 1981. Photo by Al Christianson.