Timeline:
- 1977: SP/Sea-Land well car begins testing.
- 1981: First SP double-stacks enter service.
- 1983: First Budd/Thrall well cars without bulkheads delivered.
- 1999: First production 53-foot well cars are delivered.
- 2003: TTX begins program for shortening 45- and 48-foot wells.
- 2010: TTX roster almost entirely 40- or 53-foot well platforms.
Notes:
- Thrall merged with Trinity in 2001. Thereafter, Thrall designs were marketed through Trinity Rail Group.
- Gunderson is owned by Greenbrier.
- All TTX well cars carry the reporting marks DTTX.
| TTX Double-Stack Fleet As-Built | ||||||
| Model | Well Configuration |
Qty | TTX Class | Notes | Years Active | HO Scale Model |
| Thrall Car Manufacturing | ||||||
| 100-ton Articulated Cars: | ||||||
| Lo-Pac 2000 | 40' 40' 40' 40' 40' | 296 |
TWG5M |
Capable of carrying 48' containers in the top positions. Design licensed from Budd. | 1988- | InterMountain |
| 40' 45' 48' 45' 40' | 1 | TWG50P | ||||
| 40' 45' 45' 45' 40' | 25 | TWG50F | 1988- | |||
| 40' 48' 48' 48' 40' | 408 | TWG50G TWG50K TWG50L |
||||
| 45' 45' 45' 45' 45' | 23 | TWG50D TWG50J |
1986- | |||
| 48' 48' 48' 48' 48' | 40 | TWG50E | 1989- | |||
| 125-ton Articulated Cars: | ||||||
| 40' 48' 48' 48' 40' | 292 | TWG52 | ||||
| 48' 48' 48' 48' 48' | 1,381 | TWG52A TWG52B TWG52C |
||||
| 53' 53' 53' 53' 53' | 1 | TWG53P | ||||
| 53' 53' 53' | 751 | TWG33P TWG33 |
Atlas 728688 |
|||
| Single-Unit COFC-only Cars: | ||||||
| Well Runner | 48' | 962 | TWF10 TWF10A TWH10 TWH10P |
Class One Model Works (ordered) | ||
| Drawbar-Connected COFC-only Cars: | ||||||
| 48' 48' 48' | 300 | TWG30 | 1991- | |||
| 48' 48' 48' 48' | 138 | TWG40 | 1991- | |||
| Single-Unit All Purpose Cars: | ||||||
| 48' | 150 | TWA10 | ||||
| Drawbar-Connected All-Purpose Cars: | ||||||
| 48' 48' 48' | 116 | TWA30 | ||||
| Gunderson | ||||||
| 100-ton Articulated Cars: | ||||||
| Twin-Stack | 40' 40' 40' 40' 40' | 343 | GWG50 GWG50A GWG50B GWG50C GWG50D GWG50E GWG50F GWG50G GWG50H GWG50J |
End bulkheads to retain upper containers. | InterMountain | |
| 125-ton Articulated Cars: | ||||||
| Maxi-Stack I | 40' 40' 40' 40' 40' | 3,214 | GWG52 GWG52D GWG52E GWG52G GWG52H GWG52I |
Athearn | ||
| 40' 48' 48' 48' 40' | 43 | GWG52A | ||||
| Maxi-Stack III | 48' 48' 48' 48' 48' | 2,496 | GWG52B GWG52C GWG52F |
Athearn | ||
| Maxi-Stack V | 53' 53' 53' 53' 53' | 1 | GWG53P | |||
| Maxi-Stack IV | 53' 53' 53' | 7,680 | GWG33 GWG33A GWG33B GWG33C GWG33D GWG33E GWG33P |
InterMountain Kato 766519 |
||
| Single-Unit COFC-only Cars: | ||||||
| Husky Stack | 48' | 875 | GWF10 | 1991- | Athearn InterMountain |
|
| Husky Stack | 53' | 2,130 | GWF13 | 2003- | Rapido | |
| 56' | 101 | GWF11 | ||||
| Drawbar-Connected COFC-only Cars: | ||||||
| 48' 48' 48' 48' | 60 | GWG40 | ||||
| Single-Unit All Purpose Cars: | ||||||
| Husky Stack AP | 48' | 947 | GWA10 | |||
| Drawbar-Connected All-Purpose Cars: | ||||||
| 48' 48' 48' | 873 | GWA30 | ||||
| 48' 48' 48' 48' | 200 | GWA40 | ||||
| Pullman Standard / Trinity Industries | ||||||
| 100-ton Articulated Cars: | ||||||
| BackPacker | 40' 40' 40' 40' 40' | 71 | RWG50 RWG50A RWG50B RWG50C RWG50P |
1986- | ScaleTrains | |
| 125-ton Articulated Cars: | ||||||
| 40' 40' 40' 40' 40' | 5 | RWG52A | ||||
| 40' 48' 48' 48' 40' | 117 | RWG52 | 1987- | |||
| Backpacker | 48' 48' 48' 48' 48' | 116 | RWG52B RWG52C RWG53 |
1990- | ||
| 53' 53' 53' 53' 53' | 1 | |||||
| 53' 53' 53' | 1,236 | RWG33 RWG33A |
||||
| Single-Unit COFC-only Cars: | ||||||
| Well Runner | 48' | 1 | RWH10P | |||
| Drawbar-Connected COFC-only Cars: | ||||||
| 53' 53' 53' | 160 | RWG30 | ||||
| Single-Unit All Purpose Cars: | ||||||
| 48' | 10 | RWA10 | ||||
| National Steel Car (NSC) | ||||||
| 125-ton Articulated Cars: | ||||||
| 40' 40' 40' 40' 40' | 310 | NWG52 NWG52A |
||||
| 48' 48' 48' | 286 | NWA33 | ||||
| Super Stack | 53' 53' 53' 53' 53' | 1 | ||||
| 53' 53' 53' | 5,428 | NWG33A NWG33B NWG33C NWG33D NWG33E NWG33F NWG33P |
||||
| Single-Unit COFC-only Cars: | ||||||
| 53' | 6,190 | NWF13 NWF13A |
Walthers | |||
| Drawbar-Connected COFC-only Cars: | ||||||
| 48' 48' 48' | 744 | NWG31 | 1998- | |||
| 53' 53' 53' | 1,022 | NWG33 | ||||
| Drawbar-Connected All-Purpose Cars: | ||||||
| 48' 48' 48' | 80 | NWA31 | 1995 | Walthers | ||
| 48' 48' 48' 48' | 120 | NWA40 | ||||
| Freight Car America | ||||||
| 125-ton Articulated Cars: | ||||||
| Dynastack | 40' 40' 40' 40' 40' | 50 | NWG52L | 2008- | ||
| 53' 53' 53' | 100 | NWG30 | Walthers | |||
| Single-Unit COFC-only Cars: | ||||||
| 53' | 1 | |||||
| Unidentified Builder | ||||||
| 40' 40' 40' 40' 40' | 50 | JWG52 | 2013- | |||
| 53' 53' 53' | JWG33 | 2016- | ||||
|
TTX Double-Stack Rebuilds |
||||||
| Articulated Cars or Drawbar-Connected COFC-only Cars: | ||||||
| 40' 40' 40' 40' 40 |
TWG51P |
Walthers 748410 |
||||
| 40' 40' 40' 40' 40 | GW52AM GW52BM GW52CM GW52FM |
Walthers | ||||
| 40' 40' 40' 40' 40' | RW52M RW52BM RW52CM RW53M |
1988- | ||||
| 40' 40' 40' 40' 40' | NWG32M | |||||
| 40' 48' 48' 48' 40' | TWG50K TWG52 |
1987 | ||||
| 48' 48' 48' | 1 | TWG32C | 1992 | |||
| Single-Unit COFC-only Cars: | ||||||
| 40' | TWF10F TWF10M TWF10N |
1991- | Walthers | |||
| 40' | GWF10F GWF10M |
1991- | ||||
| 40' | NWF10F NWF11F |
1994- | ||||
| 53' | GW13SF GWF13S |
1994- | Walthers | |||
| 53' | NWF13 NW13SF NW14SF |
1993- | ||||
| Single-Unit All Purpose Cars: | ||||||
| 48' | GWA10 | 1994- | Atlas Walthers 456164 |
|||
