USRA Heavy Pacific

The USRA Heavy 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 heavy passenger locomotive of the USRA types, and was 4-6-2 wheel arrangement in the Whyte notation, or 2′C1′ in UIC classification.

Roster fleet

A total of 20 locomotives were built under USRA control, with the production split between the Baldwin [Locomotive Works] and the American Locomotive Company's Richmond plant; these were sent to the following railroads:

Railroad	Quantity	Class	Road numbers	Built	Notes	Retired
Erie Railroad	20	K-5	2915–2934	1919	Ten K-5-As were also built as copies in 1923 and a K-5-B in 1926 by Baldwin.	1950-1952

Other post-USRA derivatives include the Baltimore and Ohio P-7 and the Southern Railway Ps-4 classes, the former having larger 80 inch drivers, higher tractive effort, and increased boiler pressure, and the latter with smaller 73 inch drivers, larger cabs, feedwater heaters, and later batches given larger tenders.

Railroad	Quantity	Class	Road numbers	Built	Notes	Retired
Baltimore & Ohio	20	P-7	5300-5319	1927	Built by Baldwin.	1958
Erie Railroad	10	K-5A	2935-2944	1923	Built by Baldwin. All upgraded with Boxpok driving wheels	1951-1952
Erie Railroad	1	K-5B	2960	1926	Built by Baldwin. Fitted with Uniflow cylinders, which was removed in August 1940.	1951
Southern Railway	64	Ps-4	1366-1409, 6471-6482, 6675-6691	1923-1928	Thirty-six built between 1923 and 1924 at ALCO's Schenectady Works. Twenty-three built in 1926 at ALCO's Richmond Works. The last five built in 1928 by Baldwin.	1949-1953
West Point Route	2	P-74	190 & 290	1926	Nos. 190 and 290 were both built for the Western Railway of Alabama and the Atlanta and West Point Railroad, respectively.	1954
Total	97

Three copies have been preserved.

No.	Builder	Date built	Post-USRA owner	Location	Image	Disposition
290	Lima Locomotive Works	March 1926	Atlanta and West Point Railroad	Southeastern Railway Museum		In storage, awaiting cosmetic restoration
1401	American Locomotive Works	July 1926	Southern Railway	National Museum of American History		On static display
5300	Baldwin Locomotive Works	February 1927	Baltimore and Ohio Railroad	B&O Railroad Museum		Undergoing cosmetic restoration