Northern Pacific 43.5-foot, open, 3-bay, hopper car number 72136 in a yard at Albuquerque, New Mexico, on May 3, 1981. The car is part of the 72100-72199 number series. Photo by GJ Werkema. Other subject classes: freight car, open hopper car

Northern Pacific 49.5-foot, 3-bay, covered hopper car number 76298 in a yard at Albuquerque, New Mexico, on May 30, 1980. The car is part of the 76200-76299 number series. Photo by GJ Werkema. Other subject classes: freight car, covered hopper car

Northern Pacific 52-foot, 3-bay, covered hopper car number 76338 on a siding at Albuquerque, New Mexico, on January 9, 1979. The car is part of the 76300-76399 number series. Photo by GJ Werkema. Other subject classes: freight car, covered hopper car

Northern Pacific 52-foot, 3-bay, covered hopper car number 76395 on a siding at Amarillo, Texas, on August 6, 1980. The car is part of the 76300-76399 number series. Photo by GJ Werkema. Other subject classes: freight car, covered hopper car

Northern Pacific 57.25-foot, 3-bay, covered hopper car number 76482 in a yard at Albuquerque, New Mexico, on May 21, 1980. The car is part of the 76400-76499 number series. Photo by GJ Werkema. Other subject classes: freight car, covered hopper car

Northern Pacific 49.5-foot, 3-bay, covered hopper car number 76737 in a yard at Albuquerque, New Mexico, on August 26, 1979. The car is part of the 76700-76999 number series. Photo by GJ Werkema. Other subject classes: freight car, covered hopper car

Northern Pacific 49.5-foot, 3-bay, covered hopper car number 76864 in a yard at Albuquerque, New Mexico, on October 29, 1978. The car is part of the 76700-76999 number series. Photo by GJ Werkema. Other subject classes: freight car, covered hopper car

Northern Pacific 59-foot, steel wood chip car number 582531 in a yard at Albuquerque, New Mexico, on June 21, 1995. The car is part of the 582500-582649 number series. Photo by GJ Werkema. Other subject classes: freight car, steel wood-chip car

Northern Pacific 59-foot, steel wood chip car number 582649 in a yard at Albuquerque, New Mexico, on October 1, 1995. The car is part of the 582500-582649 number series. Photo by GJ Werkema. Other subject classes: freight car, steel wood-chip car

Northern Pacific 59-foot, steel wood chip car number 582649 in a yard at Albuquerque, New Mexico, on October 1, 1995. The car is part of the 582500-582649 number series. Photo by GJ Werkema. Other subject classes: freight car, steel wood-chip car