| Owner: | Union Pacific Railroad Company |
| Type: | Open Hopper |
| AAR Class: | HK: Open top self-clearing car, having fixed sides and ends and bottom consisting of two or more divided hoppers dumping outside and/or inside of rails. (Includes former "HD") |
| AAR Type: | H130 |
| Detail Info: | Unequipped Hopper, Load Limit: less than 155,000, Non-rotary couplers |
| UP Class: | WK-50-5 |
| User Notes: | 1660 Cu Ft |
