USRA Heavy Santa Fe

Infobox Locomotive
name = USRA Heavy Santa Fe
powertype = Steam

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height = 15 ft 9 in (4.80 m)
length = 55 ft 4 in (16.87 m) without tender
width = 10 ft 8 in (3.25 m)
wheelbase = 42 ft 2 in (12.85 m)
leadingsize = 33 in (838 mm)
driversize = 63 in (1,600 mm)
trailingsize = 43 in (1,092 mm)
fueltype = Soft coal
gauge = 4 ft 8½ in (1435 mm)
cylindercount = 2
cylindersize = 30×32 in (762×813 mm)
valvegear = Walschaerts
firearea = 82.2 ft² (7.64 m²)
tubearea = 3,258 ft² (302.68 m²)
fluearea = 1,469 ft² (136.47 m²)
fireboxarea = 429 ft² (39.85 m²)
totalsurface = 5,156 ft² (479.01 m²)
superheaterarea = 1,230 ft² (114.27 m²)
tractiveeffort = 74,000 lbf (329 kN)
weightondrivers = 293,000 lb (133,000 kg)
weight = 380,000 lb (172,000 kg)
locotenderweight = 586,000 lb (266,000 kg)
valvegear = Walschaerts
boilerpressure = 190 lbf/in² (1.31 MPa)
factorofadhesion = 3.96
whytetype = 2-10-2

The USRA Heavy Santa Fe 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. These locomotives were of 2-10-2 wheel arrangement in the Whyte notation, or 1'E1' in UIC classification; this arrangement was commonly named "Santa Fe" in the United States. At the time, the Santa Fe was the largest non-articulated type in common use, primarily in slow drag freight duty in ore or coal service.

A total of 175 of these locomotives were constructed under the auspices of the USRA. They went to the following railroads: The Pennsylvania Railroad locomotives were later refitted with the Pennsy's trademark Belpaire fireboxes.