Burlington Northern 6636 in Minneapolis, Minnesota in 1980. Number 6636 is an F45 built by Electro-Motive Division (EMD), builder's number 37176. Photo by Jim Shepard.

Burlington Northern diesel locomotive 6633 at Minneapolis, Minnesota, on June 19, 1973. Number 6633 is an F45 built by General Motors Electro Motive Division (EMD), builder's number 37173. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, roundhouse.

Burlington Northern 6621 leading a trailer on flat car (TOFC) train in Minneapolis, Minnesota on June 18, 1981. Number 6621 is an F45 built by Electro-Motive Division (EMD), builder's number 36348. 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 6571 in Minneapolis, Minnesota on August 10, 1981. Number 6571 is an SD45 built by Electro-Motive Division (EMD), builder's number 38367. Photo by Al Christianson.

Burlington Northern diesel locomotive 6533 at Minneapolis, Minnesota, on August 24, 1972. Number 6533 is an SD45 built by General Motors Electro Motive Division (EMD), builder's number 37141. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive.

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 6508 at Minneapolis, Minnesota, on August 24, 1972. Number 6508 is an SD45 built by General Motors Electro Motive Division (EMD), builder's number 37116. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive.

Burlington Northern diesel locomotive 6507 at Minneapolis, Minnesota, on June 21, 1973. Number 6507 is an SD45 built by General Motors Electro Motive Division (EMD), builder's number 37115. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive.

Burlington Northern 6502 is leading a trailer on flat car (TOFC) train at Minneapolis, Minnesota on Janruary 30, 1981. Number 6502 is an SD45 built by Electro-Motive Division (EMD), builder's number 37110. Photo by Al Christianson.