The Operating Coal Unloading Car No. 3469 would unload coal into the line side bins with the use of a No. 6019 or UCS track section. This opeating car would replace the No. 3459 in 1949, and would continue in production until 1955. It is of all metal construction, with the top dump bin made out of aluminum that is painted BLACK with WHITE heat-stamped lettering, and it has brake wheels on each end.

During the years that it was being produced this car was a frequent set component. The boxes that were used for these cars have an "X" suffix to the number, were smaller in size, and did not contain a No. 160 track side unloading bin. This car could be used in conjunction with the No. 97 Coal Elevator and the No. 397 Operating Coal Loader Accessories. There are two variations:

Variation A: Has staple-end trucks. Produced 1949-51.

Variation B: Has bar-end trucks. Produced 1952-55.