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 SD40-2 Number 6707, built December 1974; an SD45, number unknown; and SD40-2 Number 6776, built May 1977; at Northtown diesel shop in Minneapolis, Minnesota on June 5, 1980. (former Northern Pacific sand hopper in background. Photo by Al Christianson.

Burlington Northern Class SD40-2 Number 6708, built February 1976; SD40-2 Number 6754, built December 1976; SD40-2 Number 6726, built February 1976; at Newport, Minnesota with eastbound loaded ore jennies, including including Northern Pacific hopper Number 78455 and Great Northern hopper Number 92*83, on May 30, 1980. Photo by Al Christianson.

Burlington Northern Class SD40-2 Number 6708, built February 1976; SD40-2 Number 6754, built December 1976; SD40-2 Number 6726, built February 1976; at Newport, Minnesota with eastbound loaded ore jennies on May 30, 1980. Photo by Al Christianson.

Burlington Northern Class SD40-2 Number 6708, built February 1976; SD40-2 Number 6754, built December 1976; and SD40-2 Number 6726, built February 1976; at Newport, Minnesota with eastbound loaded ore jennies, including Northern Pacific hopper Number 78455, Great Northern hopper Number 92*83, and Great Northern hopper Number 91867, on May 30, 1980. Photo by Al Christianson.

Burlington Northern Class SD40-2 Number 6709, built February 1976; SD40-2 Number 6754, built December 1976; SD40-2 Number 6752, built March 1976; at Chemolite, Minnesota with eastbound loaded ore jennies on February 10, 1982. Photo by Al Christianson.

Burlington Northern Class SD40-2 Number 6709, built February 1976; SD40-2 Number 6754, built December 1976; SD40-2 Number 6752, built March 1976; passing Hoffman Avenue interlocking in Saint Paul, Minnesota with eastbound loaded ore jennies on February 10, 1982. Photo by Al Christianson.

Burlington Northern Class SD40-2 Number 6710, built February 1976; SD40-2 Number 6701, built December 1974; in Cottage Grove, Minnesota with a freight on February 9, 1982. Photo by Al Christianson.

Burlington Northern Class SD40-2 Number 6716, built February 1976; F9B Number 777, (former Northern Pacific Number 6705B); F9A Number 774, (former Northern Pacific Number 6702A); in Saint Cloud, Minnesota with a freight on February 17, 1981. Photo by Al Christianson.

Burlington Northern Type Type SD40-2 Number 7031, Type F45 Number 6608, Type Type SD40-2 Number 8065 and Type Type SD40-2 Number 8070 in front of a water tower with three employees in yellow hard hats walking nearby at Dayton's Bluff, Minnesota on April 14, 1981. Number 7031 was built by EMD February 1978 as Builder Number 776055-3. It became BNSF Number 1776. Number 6608 was built by EMD July, 1969 as Builder Number 35112 and became Great Northern Number 435. It It was retired June, 1984 and became UTAH Number 6608. Number 8065 was built by EMD in November, 1979 as Builder Number 786216-35. It It was retired by the Burlington Northern and became HLCX Number 8065. Number 8070 was built by EMD in December, 1979 as Builder Number 786216-40. It It was retired by the Burlington Northern and became HLCX Number 8070, then DGNO Number 3495. Photo by Al Christianson.