USRA Light Pacific
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USRA Light Pacific
USRA Light Pacific
Atlantic Coast Line Locomotive No.1504.jpeg
Atlantic Coast Line No. 1504
Type and origin
Power typeSteam
Build date1919-1920
81, plus copies
 o Whyte4-6-2
 o UIC2?C1? h2
Driver dia.73 in (1,854 mm)
  • Coupled: 13 ft 0 in (3.96 m)
  • Locomotive: 34 ft 9 in (10.59 m)
  • Loco & tender: 68 ft  in (20.92 m)
Axle load55,000 lb (25,000 kilograms)
165,000 lb (75,000 kilograms)
Loco weight270,000 lb (120,000 kilograms)
Tender weight144,000 lb (65,000 kilograms)
Total weight414,000 lb (188,000 kilograms)
 o Firegrate area
66.7 sq ft (6.20 m2)
Boiler pressure200 psi (1.38 MPa)
Heating surface3,333 sq ft (309.6 m2)
 o Tubes2,091 sq ft (194.3 m2)
 o Flues981 sq ft (91.1 m2)
 o Firebox234 sq ft (21.7 m2)
 o Heating area794 sq ft (73.8 m2)
Cylinder size25 in × 28 in (635 mm × 711 mm)
Valve type14-inch (356 mm) piston valves
Performance figures
Tractive effort40,700 lbf (181.0 kN)
Factor of adh.4.1

The USRA Light Pacific was a USRA standard class of steam locomotive designed under the control of the United States Railroad Administration, the nationalized railroad system in the United States during World War I. This was the standard light passenger locomotive of the USRA types, and was 4-6-2 wheel arrangement in the Whyte notation, or 2?C1? in UIC classification.


A total of 81 locomotives were built under USRA control; these were sent to the following railroads:

Table of original USRA allocation[1]
Railroad Quantity Class Road numbers Notes
Atlantic Coast Line Railroad (ACL)
165 P-5-Bs were also built as copies (Nos. 1600-1764) between 1922 and 1926 by BLW.[2]
Baltimore and Ohio Railroad (B&O)
Built by BLW (Nos. 5200-5219) and ALCO (Nos. 5220-5229) in 1919.[3]
Louisville and Nashville Railroad (L&N)
20 copies (Nos. 264-283) built between 1923 and 1924.[4]
Total 81

After the dissolution of USRA, the ACL and L&N ordered additional copies of the USRA Light Pacific design,[2][4] while both the Grand Trunk Western Railroad (GTW) and the Mobile and Ohio Railroad (M&O) also ordered copies in the 1920s.[5][6]

Notable locomotives

Atlantic Coast Line No. 1504

Atlantic Coast Line No. 1504 is the only surviving original USRA Light Pacific.[7]:6-7 Designated as a National Historic Mechanical Engineering Landmark in 1990, it was currently on static display at Prime F. Osborn III Convention Center in Jacksonville, Florida.[7]:8[8]

Grand Trunk Western No. 5629

GTW No. 5629 on a fantrip excursion at Valparaiso, Indiana, in 1967

Grand Trunk Western No. 5629 was also a copy of the USRA Light Pacific, built by ALCO in 1924.[5] In 1959, it was purchased by Richard Jensen for excursion service in the 1960s.[9] However, Jensen ran into financial troubles in the early 1970s and couldn't afford to run anymore excursions with the locomotive.[9] He stored No. 5629 at the Chicago, Rock Island and Pacific Railroad (CRI&P) freight yard in Blue Island, Illinois.[9]

As the CRI&P was filed for liquidation as well as selling the Blue Island freight yard property to the Chicago commuter railroad Metra in 1980.[9][10] The commuter railroad ordered Jensen to move No. 5629 to the nearby Iowa Interstate Railroad in order to redesign the Blue Island property, but refused to allow him inspect the locomotive to have someone else move it.[9] This would led into a heated dispute as Metra threatened Jensen to scrap No. 5629, if he hadn't moved it out of the Blue Island freight yard.[9][11] At that point, the Illinois Railway Museum (IRM) was allow by Metra to move the locomotive out, but couldn't have done so since it was owned by Jensen.[9] After several preservationist groups, including the IRM, attempted to purchase No. 5629 without Jensen's permission, Metra scrapped the locomotive in late July 1987.[9][11]


  1. ^ Drury (2015), p. 50.
  2. ^ a b Drury (2015), p. 71.
  3. ^ Drury (2015), p. 76.
  4. ^ a b Drury (2015), p. 204.
  5. ^ a b Drury (2015), p. 93.
  6. ^ Drury (2015), pp. 224-225.
  7. ^ a b "USRA Steam Locomotives: Atlantic Coast Line 1504 and Baltimore and Ohio 4500" (PDF). ASME. October 23, 1990. Archived from the original (PDF) on April 18, 2019. Retrieved 2019.
  8. ^ "Atlantic Coast Line Locomotive No. 1504, Jacksonville, Fla". National Railway Historical Society. Archived from the original on September 20, 2015. Retrieved 2019.
  9. ^ a b c d e f g h "Richard Jensen and the Story of CB&Q 4960, 4963, 5632 and GTW 5629". Archived from the original on April 13, 2019. Retrieved 2019.
  10. ^ "Rock Island History". Metra. Archived from the original on April 18, 2019. Retrieved 2019.
  11. ^ a b Blaszak et al. (2014), p. 30.


  This article uses material from the Wikipedia page available here. It is released under the Creative Commons Attribution-Share-Alike License 3.0.



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