Northern Pacific 41.5-foot, open hopper car number 87077 in a yard at Amarillo, Texas, on October 12, 1976. The car is part of the 87000-87499 number series. Photo by GJ Werkema. Other subject classes: frieght car, open hopper car, Rodgers Ballast car

Northern Pacific tank car 102040 at the refueling facility at Denver, Colorado, on October 22, 1989. The car is in company fuel service. Photo by GJ Werkema. Other subject classes: freight car, tank car

Northern Pacific stock car 82713 in a cattle loading facility at Denver, Colorado, on August 1971. The car is part of the 82500-82749 number series. Photo by GJ Werkema. Subject Classes: freight car, stock car

Northern Pacific stock car 82663 in a cattle loading facility at Denver, Colorado, on August 1971. The car is part of the 82500-82749 number series. Photo by GJ Werkema. Subject Classes: freight car, stock car

Northern Pacific steel caboose 10141 in a train at Denver, Colorado, on May 17, 1970. The car is part of the 10100-10149 number series. Photo by GJ Werkema. Other subject classes: freight car, steel caboose

Northern Pacific 41.5-foot, open hopper car number 87742 on a siding at Denver, Colorado, on April 23, 1989. The car is part of the 87500-87749 number series. Photo by GJ Werkema. Other subject classes: frieght car, open hopper car

Northern Pacific 41.5-foot, open hopper car number 87546 on a siding at Denver, Colorado, on October 15, 1989. The car is part of the 87500-87749 number series. Photo by GJ Werkema. Other subject classes: frieght car, open hopper car, 77T Ballast Hopper

Northern Pacific 41.5-foot, open hopper car number 87541 in a train at Skykomish, Washington, on April 10, 1988. The car is part of the 87500-87749 number series. Photo by GJ Werkema. Other subject classes: frieght car, open hopper car, 77T Ballast car

Northern Pacific housing flat car 201304 in a train at Denver, Colorado, on January 26, 1982. The 50-foot flat car has a housing attached permenantly attached for use by maintenance-of-way crews. Other subject classes: flat car, maintenance-of-way

Northern Pacific 41.5-foot, open hopper car number 87937 on a turntable fan track at Denver, Colorado, on March 23, 1981. The car is part of the 87750-87999 number series. Photo by GJ Werkema. Other subject classes: freight car, open hopper car