Northern Pacific open hopper car number 87546 at Denver, Colorado, in 1989. Werkema, George Work cars (Railroads) Northern Pacific Railroad Company 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 15 October 1989 1 digital photograph https://staging.atom.pnrarchive.org/northern-pacific-open-hopper-car-number-87546-at-denver-colorado-in-1989 Werkema276 eng Denver (Colo.) Please see Section VII of the [Pacific Northwest Railroad Archive Collection Management Policy](http://pnrarchive.org/PNRA%20Reproduction%20Policy/Pacific%20Northwest%20Railroad%20Archive%20Collection%20Management%20Policy.pdf) for further information on