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Revision as of 23:28, 29 October 2024

Union Pacific class MK-1
2111 in the snow in Idaho in the 1930s
Type and origin
Power typeSteam
BuilderBaldwin Locomotive Works (BLW)
Build date1910-1911
Total produced86
Specifications
Configuration:
​
 • Whyte2-8-2
Gauge4 ft 8+1⁄2 in (1,435 mm) standard gauge
Valve gearWalschaerts
Career
ClassUP: MK-1
Numbers1900-1929, 2000-2014, 2100-2140
PreservedNo. 2005
DispositionOne preserved, remainder scrapped

The Union Pacific class MK-1 was a class of 2-8-2 'Mikado' type steam locomotives that were built by the Baldwin Locomotive Works originally for the Oregon Railroad and Navigation Company (OR&N), Oregon Short Line Railroad (OSL) and Union Pacific Railroad (UP) in 1910 and 1911.

History

In 1910, the Oregon-Washington Railroad and Navigation Company (OWR&N) purchased a 2-8-2 'Mikado' locomotive from the Baldwin Locomotive Works and had this single locomotive numbered 440, this locomotive would be renumbered as 500 in 1911, and renumbered to 2100 in 1915.

In 1911, the OWR&N would order another 40 of these locomotives from Baldwin where they were originally numbered as 501–540, but renumbered as 2101–2140. The Oregon Short Line Railroad (OSL) would order 15 locomotives from Baldwin and numbered them as 1100–1114, but renumbering them to 2000–2014 in 1915. The Union Pacific Railroad (UP) would order 30 locomotives from Baldwin where they numbered them as 500–529, renumbering them to 1900–1929 in 1915

OSL No. 2000 was sold to the Spokane International Railroad (SI) in 1936.

Preservation

Only one member of the class is in preservation, No. 2005, which is on static display at Ross Park based in Pocatello, Idaho.

Fleet numbers

Road number Built date Serial number First run date Retirement date Disposal date Notes
1900 1911 - - - - Scrapped
1901 1911 - - - - Scrapped
1902 1911 - - - - Scrapped
1903 1911 - - - - Scrapped
1904 1911 - - - - Scrapped
1905 1911 - - - - Scrapped
1906 1911 - - - - Scrapped
1907 1911 - - - - Scrapped
1908 1911 - - - - Scrapped
1909 1911 - - - - Scrapped
1910 1911 - - - - Scrapped
1911 1911 - - - - Scrapped
1912 1911 - - - - Scrapped
1913 1911 - - - - Scrapped
1914 1911 - - - - Scrapped
1915 1911 - - - - Scrapped
1916 1911 - - - - Scrapped
1917 1911 - - - - Scrapped
1918 1911 - - - - Scrapped
1919 1911 - - - - Scrapped
1920 1911 - - - - Scrapped
1921 1911 - - - - Scrapped
1922 1911 - - - - Scrapped
1923 1911 - - - - Scrapped
1924 1911 - - - - Scrapped
1925 1911 - - - - Scrapped
1926 1911 - - - - Scrapped
1927 1911 - - - - Scrapped
1928 1911 - - - - Scrapped
1929 1911 - - - - Scrapped
2000 April 1911 - - - - Sold to the Spokane International Railroad. Scrapped
2001 1911 - - - - Scrapped
2002 1911 - - - - Scrapped
2003 1911 - - - 1952 Scrapped
2004 1911 - - - - Scrapped
2005 April 1911 36367 - 1958 - On static display at the Ross Park in Pocatello, Idaho.
2006 1911 - - - - Scrapped
2007 1911 - - - - Scrapped
2008 1911 - - - - Scrapped
2009 1911 - - - - Scrapped
2010 1911 - - - - Scrapped
2011 1911 - - - - Scrapped
2012 1911 - - - - Scrapped
2013 1911 - - - - Scrapped
2014 1911 - - - - Scrapped
2100 1910 - - - 1955 Scrapped
2101 1911 - - - - Scrapped
2102 1911 - - - - Scrapped
2103 1911 - - - 1951 Scrapped
2104 1911 - - - - Scrapped
2105 1911 - - - - Scrapped
2106 1911 - - - - Scrapped
2107 1911 - - - - Scrapped
2108 1911 - - - - Scrapped
2109 1911 - - - - Scrapped
2110 1911 - - - - Scrapped
2111 1911 - - - - Scrapped
2112 1911 - - - - Scrapped
2113 1911 - - - - Scrapped
2114 1911 - - - - Scrapped
2115 1911 - - - - Scrapped
2116 1911 - - - - Scrapped
2117 1911 - - - - Scrapped
2118 1911 - - - - Scrapped
2119 1911 - - - - Scrapped
2120 1911 - - - - Scrapped
2121 1911 - - - - Scrapped
2122 1911 - - - - Scrapped
2123 1911 - - - - Scrapped
2124 1911 - - - - Scrapped
2125 1911 - - - - Scrapped
2126 1911 - - - - Scrapped
2127 1911 - - - - Scrapped
2128 1911 - - - - Scrapped
2129 1911 - - - - Scrapped
2130 1911 - - - - Scrapped
2131 1911 - - - - Scrapped
2132 1911 - - - - Scrapped
2133 1911 - - - - Scrapped
2134 1911 - - - - Scrapped
2135 1911 - - - - Scrapped
2136 1911 - - - - Scrapped
2137 1911 - - - - Scrapped
2138 1911 - - - - Scrapped
2139 1911 - - - - Scrapped
2140 1911 - - - - Scrapped

References

  1. McCullough, Gordon. "UPRR Steam Locomotive Roster by Class and Number" (PDF). Union Pacific Historical Society. Retrieved 2024-09-22.
  2. ^ Jones (2019), p. 76

Further reading

  • "Simple 2-8-2 for the Oregon Railroad Navigation Co". Railroad and Locomotive Engineering. Vol. 23, no. 10. October 1910. pp. 417–418.
  • "Powerful Lignite Burner of the Mikado Type". American Engineer and Railroad Journal. October 1910. pp. 404–406.
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