Burlington Northern SD40-2 Number 8177, built in August 1980; SD40-2 Number 7937, built in April 1980; SD40-2 Number 6902, built in March 1973; at Dayton's Bluff, Minnesota with an eastbound ore move on March 21, 1981. Several Great Northern ore jennies near head end. Photo by Al Christianson.

Burlington Northern SD40-2 Number 8074, built in August 1979; SD40-2 Number 8135, built in June 1980; SD40-2 number unknown; SD40-2 number unknown; passing Hoffman Avenue interlocking at Saint Paul, Minnesota with an westbound freight on June 24, 1980. Burlington Northern passenger car behind power. Photo by Al Christianson.

Burlington Northern SD40-2 Number 8055, built in October 1979; SD45 Number 6508, built in June 1971; SD45 Number 6425, former Northern Pacific Number 3625; passing Hoffman Avenue interlocking at Dayton's Bluff, Minnesota with an eastbound freight in the snow on February 8, 1982. Photo by Al Christianson.

Burlington Northern SD40-2 Number 8047, built in July 1980; GP39-2 Number 2737, built in April 1981; GP39-2 Number 2738, built in April 1981; SD40-2 number unknown; meeting eastbound piggyback freight and passing Hoffman Avenue interlocking at Dayton's Bluff, Minnesota with an westbound freight on May 1, 1981. Three cabooses on the eastbound train. Photo by Al Christianson.

Burlington Northern SD40-2 Number 6902, built March 1973; SD40-2 Number 8026, built March 1978; SD40-2 Number 8041, built September 1979; GP10 Number 1406, former Great Northern Number 606; GP10 Number 1409, former Great Northern Number 609; meet at Dayton's Bluff, Minnesota with loaded ore jennies on June 18, 1981. Photo by Al Christianson.

Burlington Northern SD40-2 Number 6799, built November 1977; SD40-2 Number 6704, built December 1974; SD40-2 Number 6711, built February 1976; SD40-2, number unknown; passing Hoffman Avenue interlocking at Dayton's Bluff, Minnesota with bathtub coal gondolas on June 4, 1981. Photo by Al Christianson.

Burlington Northern SD40-2 Number 6799, built November 1977; SD40-2 Number 6704, built December 1974; SD40-2 Number 6711, built February 1976; SD40-2, number unknown; passing Hoffman Avenue interlocking at Dayton's Bluff, Minnesota with blue-ended bathtub coal gondolas on June 4, 1981. Photo by Al Christianson.

Burlington Northern SD40-2 Number 6792, built November 1977; SD40-2 Number 6726, built February 1976; SD40-2 Number 6717, built February 1976; two SD40-2, numbers unknown; at Saint Paul, Minnesota with Burlington Northern coal hoppers on April 6, 1981. Photo by Al Christianson.

Burlington Northern SD40-2 Number 6771, built December 1976; SD40-2 Number 6703, built December 1974; two SD40-2, numbers unknown; at Saint Paul, Minnesota with bathtub coal gondolas on April 7, 1981. Photo by Al Christianson.

Burlington Northern SD40-2 Number 6759, built November 1976; SD40-2 Number 6770, built December 1976; three SD40-2 numbers unknown; at Dayton's Bluff, Minnesota with Burlington Northern coal hoppers on October 12, 1980. Photo by Al Christianson.