| T. D. Judah | |
|---|---|
| T. D. Judah in its post-rebuild 4-2-2 configuration | |
| Power type | Steam |
| Builder | Cooke Locomotive Works |
| Build date | November 1863 |
| Configuration | 4-2-4T, later rebuilt to 4-2-2 with separate tender |
| Gauge | 4 ft 8 1⁄2 in (1,435 mm) |
| Driver diameter | 54 in (1,372 mm) |
| Weight on drivers | 18,500 lb (8.4 t) |
| Locomotive weight | 39,000 lb (17.7 t) |
| Boiler pressure | 125 lbf/in² (0.86 MPa) |
| Cylinders | Two, outside |
| Cylinder size | 11 × 15 in (279 × 381 mm) |
| Tractive effort | 3,571 lbf (15.88 kN) |
| Career | Central Pacific |
| Number | 4; renum 1882 in 1906 |
| Official name | T. D. Judah |
| First run | April 9, 1864 |
| Scrapped | 1912 |
| Disposition | Scrapped |
T. D. Judah was the name of a 4-2-2 steam locomotive owned by the Central Pacific Railroad. It was named in honor of the railroad's first chief engineer, Theodore Dehone Judah, who surveyed a passable route over the Sierra Nevada Mountains for the Transcontinental Railroad.
Like its sister engine, C.P. Huntington, T. D. Judah was originally built by the Cooke Locomotive Works in 1863 for a railroad that was unable to pay for it. Later, the two were seen in the Cooke shops by Collis Huntington and purchased for use on the Central Pacific Railroad (CP), becoming the road's third and fourth locomotives respectively. Two other, larger engines, Gov. Stanford (number 1, built by Norris Locomotive Works) and Pacific (number 2, built by Mason Machine Works) had been purchased earlier.
Originally built as a 4-2-4T Forney type, this being a locomotive and tender on one frame. In 1872 the engine was rebuilt as a 4-2-2 with separate tender and may have been given other mechanical upgrades like its sister engine. The rebuild reduced the locomotive's overall weight to 30,000 lb., with 15,000 lb. on the drivers.
T. D. Judah was sold to the Wellington Colliery Company on Vancouver Island, British Columbia, Canada, where it found service as Wellington Colliery Railway's Queen Anne. It was subsequently scrapped in 1912.