Rio Grande 463

Cumbres and Toltec Scenic Railroad (Denver and Rio Grande Western) No. 463 is a 3-foot narrow-gauge class "K-27" 2-8-2 "Mikado" type steam railway locomotive built for the Denver and Rio Grande Railroad (D&RG) by the Baldwin Locomotive Works in 1903. It is one of two remaining locomotives of D&RGW class K-27, the other one being No. 464 at the Huckleberry Railroad in Genesee Township, Michigan. The class eventually became known by the nickname "Mudhens". Today, No. 463 is operational on the Cumbres and Toltec Scenic Railroad between Chama, New Mexico and Antonito, Colorado.

D&RGW 463
463 on the Cumbres and Toltec in 2021
Type and origin References:[1][2] Power type Steam Builder Baldwin Locomotive Works Serial number 21788 Build date April 1903 Rebuild date 2009–May 2013
Specifications Configuration: ​  • Whyte 2-8-2  • UIC 1′D1′ v, later 1′D1′ h Gauge 3 ft (914 mm)[3] Leading dia. 28 in (711 mm) Driver dia. 40 in (1,016 mm) Trailing dia. 28 in (711 mm) Wheelbase 24.5 ft (7.47 m) Length 33.7 ft (10.27 m) Adhesive weight 105,425 lb (47,820 kg; 48 t) Loco weight 136,650 lb (61,983 kg; 62 t) Fuel type Coal Superheater yes, later Cylinders Original: Four Vauclain compound, Later: Two, simple Cylinder size Original: 13 in × 22 in (330 mm × 559 mm) and 22 in × 22 in (559 mm × 559 mm) Later: 17 in × 22 in (432 mm × 559 mm) Valve gear Walschaerts Valve type Original: slide valves Later: piston valves
Performance figures Tractive effort 27,000 lbf (120 kN)
Career Operators Denver and Rio Grande Railroad (D&RG) → Denver and Rio Grande Western Railroad (D&RGW) → Cumbres and Toltec Scenic Railroad (C&TSRR) Class D&RG: 125 D&RGW: K-27 Number in class 14 of 15 Numbers D&RG 463 D&RGW 463 C&TSRR 463 RGS 455 Nicknames Mudhen Retired 1950s (revenue service) 2002 (1st excursion service) Restored 1994 (1st restoration) May 2013 (2nd restoration) Disposition Operational, in service on the Cumbres and Toltec Scenic Railroad Engine No. 463 U.S. National Register of Historic Places Colorado State Register of Historic Properties Show map of New Mexico Show map of the United States Location C&TS shops, Chama, New Mexico Coordinates 36°54′10.4″N 106°34′40.7″W Area 0 acres (0 ha) Built 1903 Architect Baldwin Locomotive Works NRHP reference No. 75000502 [4] CSRHP No. 5CN.68 Added to NRHP May 12, 1975

Fifteen locomotives were built, originally class 125, then reclassified K-27 in 1924 when the D&RG became the Denver and Rio Grande Western Railroad (D&RGW). The K-27s were built as Vauclain compounds, with two cylinders on each side, expanding the steam once in the smaller cylinder and then a second time in the larger one. The extra maintenance costs of the two cylinders were greater than the fuel saving, so they were converted to simple expansion in 1907–1909.[2] They were Rio Grande's last purchase of compound locomotives. They pulled freight, passenger and mixed trains on the D&RGW in and over the Colorado Rocky Mountains, traversing the entire length of the railroad. They were built with their main structural frames outside the driving wheels, with the counterweights and rods attached outside the frames.

No. 463 was sold to cowboy actor and singer Gene Autry in May 1955.[5] Autry never used the engine and donated it to the town of Antonito, Colorado. It was restored by and entered into service on the Cumbres and Toltec Scenic Railroad in 1994. It was taken out of service with a broken side rod in late 2002. In 2009, it was moved to the railroad's shop at Chama, New Mexico where a major rebuild was taken until completion in Spring 2013.[6] On May 20, 2013, the restored locomotive made its inaugural run on the C&TSRR.[7]

No. 463 was added to the National Register of Historic Places in 1975 as Engine No. 463.