Burlington Northern Type U33C Number 5728, built February 1971; SD40-2 Number 8028, built March, 1978; and three unidentified SD40-2s in Minneapolis, Minnesota on November 19, 1980. Soo Line covered hopper in background. Photo by Al Christianson.

Burlington Northern Type U33C Number 5728, built February 1971; SD40-2 Number 8028, built March, 1978; in Minneapolis, Minnesota on November 19, 1980. Photo by Al Christianson.

Burlington Northern Type U33C Number 5750, built August 1971; SD40-2 Number 6822, former Number 6362, built November 1973; and an unidentified St. Louis-San Francisco Railway (Frisco) diesel engine at Mississippi Street in St Paul, Minnesota on August 5, 1979. Photo by Tom Carlson.

Burlington Northern Type U33C Number 5754, built September 1971; SD40-2 Number 8006, built May 1977; in Minneapolis, Minnesota on February 26, 1979. Photo by Gene Hetherington.

Burlington Northern Type U33C Number 5764, former S J Groves Number 507; U33C Number 5750, built August 1971; SD40-2 Number 6910, former Number 6374, built April 1973; U33C Number 5712, former Great Northern Number 2542; passing Hoffman Avenue interlocking in Daytons Bluff, Minnesota with Corn Products (CCLX) airslide covered hopper Number 50062 on March 11, 1980. Photo by Al Christianson.

Burlington Northern Type U33C Number 5764, former S J Groves Number 507; U33C Number 5750, built August 1971; SD40-2 Number 6910, former Number 6374, built April 1973; U33C Number 5712, former Great Northern Number 2542; passing Hoffman Avenue interlocking in Daytons Bluff, Minnesota with westbound freight on March 11, 1980. Photo by Al Christianson.

Burlington Northern Type U33C Number 5764, former S J Groves Number 507; U33C Number 5750, built August 1971; passing Hoffman Avenue interlocking in Daytons Bluff, Minnesota on March 11, 1980. Photo by Al Christianson.

Burlington Northern Type U30C Number 5812, built September 1973; C30-7 Number 5598, built June 1979; and a U30C (number unknown); with westbound empty utility bathtub coal gondolas east of Alliance, Nebraska on August 23, 1981. Photo by Al Christianson.

Burlington Northern Type U30C Number 5812, built September 1973; C30-7 Number 5598, built June 1979; and a U30C (number unknown); with westbound empty utility bathtub coal gondolas about six miles west of Mullen, Nebraska on August 23, 1981. Photo by Al Christianson.

Burlington Northern Type U30C Number 5812, built September 1973; C30-7 Number 5598, built June 1979; and a U30C (number unknown); with westbound empty utility bathtub coal gondolas west of Mullen, Nebraska on August 23, 1981. Photo by Al Christianson.