| Owner: | Potomac Electric Power Company |
| Type: | Gondola |
| AAR Class: | GT: Open top car, having high fixed sides and fixed or hinged ends and solid bottom, suitable for unloading on dumping machines only. |
| AAR Type: | J301 |
| Detail Info: | Gondola, Load Limit: 185,000 and greater, Flat Bottom, Inside Length: 36-48ft |
| Plate: | B |
| Builder: | Thrall Car Manufacturing Co. |
| Max Gross Weight: | 263000 |
| Load Limit: | 200600 |
| Dry Capacity: | 4012 |
| Ext L/W/H: | 53' 1" / 10' 8" / 12' 9" |
| Int L/W/H: | 46' 11" / 8' 9" / 9' 2" |
| User Notes: | Thrall 4000 |
