Northern Pacific 41.5-foot, open hopper car number 87609 on a siding at Broomfield, Colorado, on September 16, 1989. The car is part of the 87500-87749 number series. Photo by GJ Werkema. Other subject classes: frieght car, open hopper car, Rodgers Ballast 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 41.5-foot, open hopper car number 87536 on a siding at Bellingham, Washington, on August 3, 1982. The car is part of the 87500-87749 number series. Photo by GJ Werkema. Other subject classes: frieght car, open hopper car, Selectable Dump Ballast car

Northern Pacific 41.5-foot, open hopper car number 87467 in a train at Skykomish, Washington, on April 10, 1988. 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

The B-end of Northern Pacific Hart ballast car 87384 showing its gate and brake equipment at Denver, Colorado, on September 20, 1973. The car is part of the 87000-87499 number series. Photo by GJ Werkema. Other subject classes: frieght car, open hopper car, Selectable Dump Ballast car

Northern Pacific flat car 206356 assigned to maintenance-of-way (MOW), is serving as a pile driver boom tender at Great Falls, Montana, on September 12, 1990. Pile Driver Tender Other subject classes: maintenance-of-way, flat car,

Northern Pacific maintenance-of-way flat car 203311 with boon and shovel load at Pasco, Washington, on February 14, 1981. Other subject classes: frieght car, flat car, maintenance-of-way

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