Burlington Northern Diesel Locomotive, Type SW7 Number 117 at Kansas City, Missouri on June 20, 1980. Number 117 was built by Electro-Motive Division (EMD) in May, 1950 as Chicago, Burlington and Quincy Number 9251, Builder Number 8495. It was retired in July, 1986. Photo by Al Christianson.

Burlington Northern 7861 at Saint Paul, Minnesota on March 12, 1981. Number 7861 is an SD40-2 built by Electro-Motive Division (EMD), builder's number 786001-6. Photo by Al Christianson.

Burlington Northern 7856 in Northtown Yard at Minneapolis, Minnesota on February 24, 1981. Number 7856 is an SD40-2 built by Electro-Motive Division (EMD), builder's number 786001-1. Photo by Al Christianson.

Burlington Northern 6788 at Dayton's Bluff in Saint Paul, Minnesota on June 18, 1981. Number 6788 is an SD40-2 built by Electro-Motive Division (EMD), builder's number 766072-3. Photo by Al Christianson.

Burlington Northern 6782 at Northtown Yard in Minneapolis, Minnesota on February 24, 1981. Number 6782 is an SD40-2 built by Electro-Motive Division (EMD), builder's number 766071-2. Photo by Al Christianson.

Burlington Northern 6613 at the Northtown yard in Minneapolis, Minnesota on February 24, 1981. Number 6613 is an F45 built by Electro-Motive Division (EMD), builder's number 35117. Photo by Al Christianson.

Burlington Northern 6511 is leading a train at Northtown yard in Minneapolis, Minnesota on June 15, 1980. Number 6511 is an SD45 built by Electro-Motive Division (EMD), builder's number 37119. Photo by Al Christianson.

Burlington Northern diesel locomotive Number 6323, EMD SD40, works an eastbound freight at the east end of the Wishram, Washington yard, undated. Photo by Robert Johnston.

Burlington Northern diesel locomotive 6118 at Northtown Yard Minneapolis, Minnesota on February 24, 1981. Number 6118 is an SD9 built by Electro-Motive Division (GM), builder's number 24093. Photo by Al Christianson.

Burlington Northern diesel locomotive 5839 in a power lash-up at Omaha, Nebraska on August 4, 1979. Number 5839 is a U30C built by General Electric (GE), builder's number 40605. Photo by Al Christianson.