White Pass & Yukon Route 73

White Pass & Yukon Route 73
WP&YR narrow gauge locomotive No. 73 at Skagway, Alaska in August 2006
Type and origen Power type Steam Builder Baldwin Locomotive Works Serial number 73352 Model 12 28¼ E Build date May 1947
Specifications Configuration: ​  • Whyte 2-8-2  • UIC 1′D1′ h2 Gauge 3 ft (914 mm) Driver dia. 44 in (1.118 m) Wheelbase 55 ft 8+1⁄2 in (16.98 m) Height 12 ft 7 in (3.84 m) Adhesive weight 108,000 lb (49.0 t) Loco weight 145,000 lb (65.8 t) Total weight 248,400 lb (112.7 t) Fuel type Oil Fuel capacity 2,500 US gal (9,500 L; 2,100 imp gal) Water cap. 5,000 US gal (19,000 L; 4,200 imp gal) Firebox: ​  • Grate area 36 sq ft (3.3 m2) Boiler 64 in (1.63 m) diameter Boiler pressure 220 lbf/in2 (1.52 MPa) Heating surface: ​  • Firebox 114 sq ft (10.6 m2)  • Tubes 993 sq ft (92.3 m2)  • Flues 555 sq ft (51.6 m2)  • Total surface 1,676 sq ft (155.7 m2) Cylinders Two, oudside Cylinder size 17 in × 22 in (432 mm × 559 mm)
Performance figures Tractive effort 25,200 lbf (112.1 kN) Factor of adh. 4.24
Career Operators White Pass and Yukon Route Numbers WP&YR 73 Retired 1964 (revenue service) Restored 1982 Current owner White Pass and Yukon Route (for tourist excursion service) Disposition Operational, based in Skagway, Alaska

White Pass & Yukon Route 73 is an operating narrow-gauge 2-8-2 "Mikado" type steam locomotive. It was built by the Baldwin Locomotive Works for the White Pass and Yukon Route in May 1947. After retirement on June 30, 1964, the locomotive was moved to Bennett, British Columbia, in 1968 for static display. In 1979, the locomotive was moved again to Whitehorse, Yukon, this time to be restored to operating condition. Restoration was completed in 1982 and the locomotive has been back in service since then. It is currently the larger of two operating steam locomotives on the line.