Amtrak diesel locomotive 505, an EMD SDP40F SN 72694-6 at Dallas, Texas in June 1978. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, passenger train

Amtrak diesel locomotive 505, an EMD SDP40F SN 72694-6 at Dallas, Texas in June 1978. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, passenger train

Amtrak diesel locomotive 506, an EMD SDP40F SN 72694-7 at Dallas, Texas on June 22, 1978. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, passenger train

Amtrak diesel locomotive 506, an EMD SDP40F SN 72694-7 at Dallas, Texas on June 22, 1978. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, passenger train

Amtrak passenger train passes Reunion Tower in Dallas, Texas on June 22, 1978. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, passenger train

Amtrak passenger train passes Reunion Tower in Dallas, Texas on June 22, 1978. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, passenger train

Amtrak passenger train passes Reunion Tower in Dallas, Texas on June 22, 1978. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, passenger train

Burlington Northern 8162 in Fort Worth, Texas on September 27, 1981. Number 8162 is a SD40-2 built by the Electro-Motive Division of General Motors (EMD), builder's number 786256-73.

Burlington Northern diesel locomotive 5638, formerly Chicago, Burlington and Quincy 558, at Amarillo, Texas, on June 28, 1978. Number 5638 is a U25C built by General Electric, builder's number 35605. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive.

Burlington Northern diesel locomotive 6078 at Fort Worth, Texas on June 7, 1981. Number 6078 is an SD7 built by Electro-Motive Division (GM), builder's number 17260. The locomotive is sub-lettered for the C&S ( for Colorado & Southern).

Burlington Northern 6523 in Fort Worth, Texas on September 27, 1981. Number 6523 is an SD45 built by Electro-Motive Division (EMD), builder's number 37131.

Burlington Northern 6526 in Fort Worth, Texas on October 24, 1981. Number 6526 is an SD45 built by Electro-Motive Division (EMD).

Burlington Northern 7018 leading coal train in Birds, Texas on October 5, 1980. Number 7018 is an SD40-2 built by Electro-Motive Division (EMD), builder's number 776053-28. Photo by Bill Phillips.

Burlington Northern 7143 leading train in Fort Worth, Texas on June 15, 1980. Number 7143 is an SD40-2 built by Electro-Motive Division (EMD), builder's number 786173-18.

Burlington Northern GP38-2 Number 2150, built June 1980; at Fort Worth, Texas on February 1, 1981. Sub-lettering for Fort Worth and Denver. Photo by Al Christianson.

Burlington Northern diesel locomotive 5362 at Fort Worth, Texas on May 31, 1981. Number 5362 is a U30C built by General Electric (GE). From the Al Christianson Collection, the photographer is Al Christianson.

Burlington Northern diesel locomotive 5378 at Fort Worth, Texas on June 7, 1981. Number 5378 is a U30C built by General Electric (GE). From the Al Christianson Collection, the photographer is Al Christianson.

Burlington Northern Type C30-7 Number 5585, built June 1979, next to a dwarf signal at Fort Worth, Texas on February 15, 1981. Maintenance base "Alliance" for Number 5585. Photographer unknown.

Burlington Northern diesel locomotive 5585 at Fort Worth, Texas on February 15, 1981. Number 5585 is a C30-7 built by General Electric (GE). From the Al Christianson Collection, the photographer is unknown.

Burlington Northern GP38-2 Number 2150, built June 1980; SD7 Number 6087, former Fort Worth and Denver Number 857; at Dallas, Texas on May 27, 1981. Sub-lettering for Fort Worth and Denver on Number 2150. Photo by Al Christianson.

Burlington Northern GP38-2 Number 2153, built July 1980; U30C Number 5942, built June 1975; at Fort Worth, Texas on July 19, 1981. Sub-lettering for Fort Worth and Denver on Number 2153 and assigned to "Childress". Photo by Al Christianson.

Burlington Northern GP38-2 Number 2154, built June 1980; SD7 Number 6088, former Fort Worth and Denver Number 858; at Fort Worth, Texas on April 26, 1981. Sub-lettering for Fort Worth and Denver on Number 2154 and assigned to "Childress". Photo by Al Christianson.

Burlington Northern GP38-2 Number 2296, former Frisco Number 441; SD40 Number 6343, former Colorado and Southern Number 883; at Fort Worth, Texas on June 7, 1981. Number 2296 still in Frisco paint with BN sub-lettering. Frisco boxcar SLSF Number xx838 in background. Photo by Al Christianson.

Burlington Northern C30-7 Number 5028, built March 1980; C30-7 Number unknown; SD40-2 Number unknown; U30C Number unknown; with southbound coal loads at Fort Worth, Texas on May 31, 1981. Photo by Al Christianson.

Burlington Northern C30-7 Number 5091 and SD40-2 Number 7825 at Fort Worth, Texas on April 19, 1981. Number 5091 was built by General Electric Company (GE) in April 1980. Builder Number 42883. It was retired in January 2001. It became ALL Number 9252. Number 7825 was built by Electro-Motive Division (EMD) in November 1974 as C&S Number 955. Builder Number 74648-6. It became BNSF Number 7825, then Number 1795.

Chicago, Rock Island & Pacific Railroad diesel locomotive 4346 at Amarillo, Texas on June 21, 1978. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive

Chicago, Rock Island & Pacific Railroad diesel locomotive 4346 at Amarillo, Texas on June 21, 1978. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive

Chicago, Rock Island & Pacific Railroad diesel locomotive 811 switches cars at Amarillo, Texas on June 21, 1978. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive

Fort Worth and Denver Railway diesel locomotive 608 sits under a highway overpass in Amarillo, Texas on June 21, 1978. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive