Southern Pacific 2472

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Southern Pacific 2472
SP No. 2472 at the Niles Canyon Railway
Type and origin Power type Steam Builder Baldwin Locomotive Works Serial number 54477 Build date March 1921 Rebuild date November 29, 1940
Specifications Configuration: ​  • Whyte 4-6-2  • UIC 2'C1' Gauge 4 ft 8+1⁄2 in (1,435 mm) standard gauge Driver dia. 73 in (1,854 mm) Wheelbase 75.80 ft (23.10 m) ​  • Engine 35.50 ft (10.82 m)  • Drivers 13 ft (4.0 m) Axle load 60,700 lb (27,500 kg) Adhesive weight 180,000 lb (82,000 kg) Loco weight 297,800 lb (135,100 kg)[1] Tender weight 160,800 lb (72,900 kg) Total weight 457,800 lb (207,700 kg) Fuel type Oil Fuel capacity 4,000 US gal (15,000 L; 3,300 imp gal) Water cap. 12,000 US gal (45,000 L; 10,000 imp gal) Firebox: ​  • Grate area 70.40 sq ft (6.540 m2) Boiler pressure 210 psi (1.4 MPa) Heating surface: ​  • Firebox 283 sq ft (26.3 m2) Cylinder size 25 in × 30 in (635 mm × 762 mm) Valve gear Walschaerts
Performance figures Tractive effort 46,800 lbf (208.18 kN) Factor of adh. 4.15
Career Operators Southern Pacific Class P-8 Number in class 15 Numbers SP 2472 Delivered April 15, 1921 Last run January 1957 Retired February 7, 1957 Preserved April 10, 1959 Restored April 30, 1991 Current owner Golden Gate Railroad Museum Disposition Undergoing 1,472-day inspection and overhaul

Southern Pacific 2472 is a P-8 Class 4-6-2 heavy "Pacific" type steam locomotive built by the Baldwin Locomotive Works for the Southern Pacific Railroad (SP) in 1921. No. 2472 is one of three surviving Southern Pacific P-8 class 4-6-2 Pacific locomotives, the other two being Nos. 2467 and 2479. The 4-6-2 designation means it has four leading wheels, six driving wheels, and two trailing wheels. The locomotive was used by the Southern Pacific Railroad to haul passenger trains until being retired in 1957. The locomotive was then donated to San Mateo County and placed on static display at the San Mateo County Fairgrounds. After being restored to operational condition in the early 1990s, the locomotive would pull excursion trains on the Niles Canyon Railway until being retired in 2015. The No. 2472 was then moved to the Northwest Pacific Railroad, where it is as of 2023, undergoing its Federal Railroad Administration (FRA) mandated 1,472 day inspection and overhaul.