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Union Pacific Steam Locomotives, 1915-1962

Part 7, UP 1800 to OWRR&N 2171

This page was last updated on August 7, 2014.

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UP 4-8-0 -- 8 locomotives (Belpaire fireboxes)

1915 UP
Number
First
Number
Builder Builder
Number
Date
Built
Date
Vacated
Notes
UP 1800 UP 1500 Brooks 3211 May 1899 Oct 1925 1
UP 1801 UP 1501 Brooks 3212 May 1899 Oct 1925 2
UP 1802 UP 1502 Brooks 3213 May 1899 Oct 1925 3
UP 1803 UP 1503 Brooks 3214 May 1899 Oct 1925 4
UP 1804 UP 1504 Brooks 3215 May 1899 Oct 1925 5
UP 1805 UP 1505 Brooks 3216 May 1899 Nov 1926 6
UP 1806 UP 1506 Brooks 3217 May 1899 Nov 1926 7
UP 1807 UP 1507 Brooks 3218 May 1899 Nov 1926 8

Description:

Cabside Class: TW-57
Drive Wheel Diameter: 57 inches
Cylinders: 21x30 inches
Maximum Tractive Effort: 39,457 pounds
Weight on Drivers: 165,000 pounds
Weight in Working Order (Engine Only): 200,000 pounds
Weight in Working Order (Engine and Tender): 306,000 pounds
Fuel: Coal

General Notes:

a. UP 1800-1807 were built with Belpaire fireboxes

Notes:

1. UP 1800 was built as UP 1500 in 1899; to UP 1800 in 1915; vacated in 1925
2. UP 1801 was built as UP 1501 in 1899; to UP 1801 in 1915; vacated in 1925
3. UP 1802 was built as UP 1502 in 1899; to UP 1802 in 1915; vacated in 1925
4. UP 1803 was built as UP 1503 in 1899; to UP 1803 in 1915; vacated in 1925
5. UP 1804 was built as UP 1504 in 1899; to UP 1804 in 1915; vacated in 1925
6. UP 1805 was built as UP 1505 in 1899; to UP 1805 in 1915; vacated in 1926
7. UP 1806 was built as UP 1506 in 1899; to UP 1806 in 1915; vacated in 1926
8. UP 1807 was built as UP 1507 in 1899; to UP 1807 in 1915; vacated in 1926
   

UP 4-6-0 -- 1 locomotive

1915 UP
Number
First
Number
Second
Number
Third
Number
Fourth
Number
Fifth
Number
Builder Builder
Number
Date
Built
1915 UP
Number
Notes
UP 1817 UPRR 95 UPRy 95 UPRy 921 UPRy 1701 UP 1701 Taunton 433 Jun 1868 UP 1317 1

Description:

Drive Wheel Diameter: 69 inches (rebuilt from 54 inches in December 1892)
Cylinders: 20x24 inches (rebuilt from 18x24 inches in December 1892)
Maximum Tractive Effort: 19,513 pounds
Weight on Drivers: 113,200 pounds
Weight in Working Order (Engine Only): 137,100 pounds
Weight in Working Order (Engine and Tender): 244,333 pounds
Fuel: Coal

Notes:

1. UP 1817 was built as UPRR 95 in 1868; to UPRy 95 in 1880; to UPRy 921 in 1885; rebuilt to UPRy 1701 in 1892; to UP 1701 in 1898; to UP 1817 in 1915; to UP 1317 in 1915; vacated in 1926
   

UP 4-6-0 -- 1 locomotive

1915 UP
Number
First
Number
Second
Number
Third
Number
Fourth
Number
Builder Builder
Number
Date
Built
1915 UP
Number
Notes
UP 1818 KP 104 UPRy 1020 UPRy 1702 UP 1702 Danforth 1173 1880 UP 1318 1

Description:

Drive Wheel Diameter: 69 inches (rebuilt from 57 inches in June 1893)
Cylinders: 20x24 inches (rebuilt from 18x24 in June 1893)
Maximum Tractive Effort: 19,513 pounds
Weight on Drivers: 113,200 pounds
Weight in Working Order (Engine Only): 137,100 pounds
Weight in Working Order (Engine and Tender): 244,333 pounds
Fuel: Coal

Notes:

1. UP 1818 was built as KP 104 in 1880; to UPRy 1020 in 1885; rebuilt to UPRy 1702 in 1893; to UP 1702 in 1898; to UP 1818 in 1915; to UP 1318 in 1915; vacated in 1926
   

UP 4-6-0 -- 1 locomotive

1915 UP
Number
First
Number
Second
Number
Third
Number
Fourth
Number
Fifth
Number
Builder Builder
Number
Date
Built
1915 UP
Number
Notes
UP 1819 UPRR 96 UPRy 96 UPRy 922 UPRy 1700 UP 1700 Taunton 434 Jun 1868 UP 1319 1

Description:

Drive Wheel Diameter: 62 inches (rebuilt from 54 inches in June 1892)
Cylinders: 20x24 inches (rebuilt from 18x24 inches in June 1892)
Maximum Tractive Effort: 21,716 pounds
Weight on Drivers: 113,200 pounds
Weight in Working Order (Engine Only): 137,100 pounds
Weight in Working Order (Engine and Tender): 244,333 pounds
Fuel: Coal

Notes:

1. UP 1819 was built as UPRR 96 in 1868; to UPRy 96 in 1880; to UPRy 922 in 1885; rebuilt to UPRy 1700 in 1892; to UP 1700 in 1898; to UP 1819 in 1915; to UP 1319 in 1915; vacated in 1928
   

OSL 4-8-0 -- 7 locomotives

1915 OSL
Number
First
Number
Second
Number
Builder Builder
Number
Date
Built
Date
Vacated
Notes
OSL 1850 OSL 900 (1st) OSL 930 Cooke 2469 Oct 1899 Oct 1928 1
OSL 1851 OSL 901 (1st) OSL 931 Cooke 2470 Oct 1899 Dec 1926 2
OSL 1852 OSL 902 (1st) OSL 932 Cooke 2471 Oct 1899 Oct 1928 3
OSL 1853 OSL 903 (1st) OSL 933 Cooke 2472 Oct 1899 Nov 1928 4
OSL 1854 OSL 904 (1st) OSL 934 Cooke 2475 Oct 1899 Mar 1926 5
OSL 1855 OSL 905 (1st) OSL 935 Cooke 2495 Nov 1899 Nov 1928 6
OSL 1856 OSL 906 (1st) OSL 936 Cooke 2496 Nov 1899 Mar 1928 7

Description:

Cabside Class: TW-55
Drive Wheel Diameter: 55 inches
Cylinders: 21x30 inches
Maximum Tractive Effort: 40,893 pounds
Weight on Drivers: 160,000 pounds
Weight in Working Order (Engine Only): 194,000 poiunds
Weight in Working Order (Engine and Tender): (varied due to different tender styles)
Fuel: Coal

Notes:

1. OSL 1850 was built as OSL 900 (1st) in 1899; to OSL 930 in 1912; to OSL 1850 in 1915; vacated in 1928
2. OSL 1851 was built as OSL 901 (1st) in 1899; to OSL 931 in 1912; to OSL 1851 in 1915; vacated in 1926
3. OSL 1852 was built as OSL 902 (1st) in 1899; to OSL 932 in 1912; to OSL 1852 in 1915; vacated in 1928
4. OSL 1853 was built as OSL 903 (1st) in 1899; to OSL 933 in 1912; to OSL 1853 in 1915; vacated in 1928
5. OSL 1854 was built as OSL 904 (1st) in 1899; to OSL 934 in 1912; to OSL 1854 in 1915; vacated in 1926
6. OSL 1855 was built as OSL 905 (1st) in 1899; to OSL 935 in 1912; to OSL 1855 in 1915; vacated in 1928
7. OSL 1856 was built as OSL 906 (1st) in 1899; to OSL 936 in 1912; to OSL 1856 in 1915; vacated in 1928
   

UP 2-8-2 -- 30 locomotives

1915 UP
Number
First
Number
Builder Builder
Number
Date
Built
Fuel Date
Vacated
Notes
UP 1900 UP 500 Baldwin 36227 Mar 1911 Oil Sep 1947  
UP 1901 UP 501 Baldwin 36228 Mar 1911 Coal Apr 1948  
UP 1902 UP 502 Baldwin 36229 Mar 1911 Coal Oct 1954  
UP 1903 UP 503 Baldwin 36230 Mar 1911 Coal Mar 1948  
UP 1904 UP 504 Baldwin 36231 Mar 1911 Coal Oct 1947  
UP 1905 UP 505 Baldwin 36232 Mar 1911 Coal Mar 1955  
UP 1906 UP 506 Baldwin 36233 Mar 1911 Coal Mar 1948  
UP 1907 UP 507 Baldwin 36234 Mar 1911 Coal May 1947  
UP 1908 UP 508 Baldwin 36235 Mar 1911 Coal Apr 1948  
UP 1909 UP 509 Baldwin 36236 Mar 1911 Coal Nov 1947  
UP 1910 UP 510 Baldwin 36352 Apr 1911 Coal May 1947  
UP 1911 UP 511 Baldwin 36353 Apr 1911 Coal Feb 1948  
UP 1912 UP 512 Baldwin 36354 Apr 1911 Oil Apr 1956  
UP 1913 UP 513 Baldwin 36355 Apr 1911 Coal May 1947  
UP 1914 UP 514 Baldwin 36356 Apr 1911 Coal Feb 1954  
UP 1915 UP 515 Baldwin 36357 Apr 1911 Coal Dec 1947  
UP 1916 UP 516 Baldwin 36358 Apr 1911 Coal Dec 1953  
UP 1917 UP 517 Baldwin 36359 Apr 1911 Coal Mar 1947 1
UP 1918 UP 518 Baldwin 36360 Apr 1911 Coal Mar 1948  
UP 1919 UP 519 Baldwin 36361 Apr 1911 Coal Dec 1957  
UP 1920 UP 520 Baldwin 36448 Apr 1911 Coal Mar 1948  
UP 1921 UP 521 Baldwin 36449 Apr 1911 Coal Sep 1947  
UP 1922 UP 522 Baldwin 36450 Apr 1911 Coal Jan 1954  
UP 1923 UP 523 Baldwin 36451 Apr 1911 Oil Jun 1954  
UP 1924 UP 524 Baldwin 36516 May 1911 Oil Dec 1957  
UP 1925 UP 525 Baldwin 36517 May 1911 Oil Oct 1953 2
UP 1926 UP 526 Baldwin 36518 May 1911 Coal May 1947  
UP 1927 UP 527 Baldwin 36519 May 1911 Coal Mar 1949  
UP 1928 UP 528 Baldwin 36520 May 1911 Coal Mar 1949  
UP 1929 UP 529 Baldwin 36521 May 1911 Coal May 1947  

Description:

CS Class: MK-1
Cabside Class: MK-57 (MacA-57 after WWII)
Drive Wheel Diameter: 57 inches
Cylinders: 23-3/4x30 inches
Maximum Tractive Effort: 47,945 pounds
Weight on Drivers: 206,200 pounds
Weight in Working Order (Engine Only): 263,000 pounds
Weight in Working Order (Engine and Tender): 430,700 pounds
Fuel: (see above)

General Notes:

a. Classes MK-1 and MK-2 were classed as Light Mikado; classes MK-3 through MK10 were classed as Heavy Mikado
b. All MK (Mikado) classes were changed to MacA (MacArthur) classes during World War II.
c. UP 1913, 1915, 1917, 1919 and 1928 were equipped with Duplex stokers, increasing their operating weight from 206,200 pounds to 210,000 pounds

Notes:

1. UP 1917 was built as UP 517 in 1911; to UP 1917 in 1915; vacated in 1947; sold to Spokane International 1917
2. UP 1925 was built as UP 525 in 1911; to UP 1925 in 1915; vacated in 1947, scrapped due to damage caused by roundhouse fire at Huntington, Oregon
   

UP 2-8-2 -- 20 locomotives

1915 UP
Number
First
Number
Builder Builder
Number
Date
Built
Fuel Date
Vacated
Notes
UP 1930 UP 530 Baldwin 38362 Sep 1912 Coal Mar 1956  
UP 1931 UP 531 Baldwin 38363 Sep 1912 Oil Dec 1947  
UP 1932 UP 532 Baldwin 38385 Sep 1912 Coal May 1956  
UP 1933 UP 533 Baldwin 38386 Sep 1912 Coal Mar 1956  
UP 1934 UP 534 Baldwin 38421 Oct 1912 Coal Mar 1955  
UP 1935 UP 535 Baldwin 38422 Oct 1912 Coal Nov 1953  
UP 1936 UP 536 Baldwin 38423 Oct 1912 Coal Mar 1947 1
UP 1937 UP 537 Baldwin 38424 Oct 1912 Coal Mar 1956  
UP 1938 UP 538 Baldwin 38425 Oct 1912 Oil May 1958  
UP 1939 UP 539 Baldwin 38490 Oct 1912 Coal Mar 1947  
UP 1940 UP 540 Baldwin 38491 Oct 1912 Coal Feb 1949  
UP 1941 UP 541 Baldwin 38492 Oct 1912 Coal Aug 1953  
UP 1942 UP 542 Baldwin 38493 Oct 1912 Coal May 1955  
UP 1943 UP 543 Baldwin 38494 Oct 1912 Coal Sep 1954  
UP 1944 UP 544 Baldwin 38495 Oct 1912 Coal Aug 1953  
UP 1945 UP 545 Baldwin 38496 Oct 1912 Coal Oct 1956  
UP 1946 UP 546 Baldwin 38497 Oct 1912 Coal Feb 1954  
UP 1947 UP 547 Baldwin 38498 Oct 1912 Coal Jan 1954  
UP 1948 UP 548 Baldwin 38499 Oct 1912 Oil Jul 1956  
UP 1949 UP 549 Baldwin 38500 Oct 1912 Coal Feb 1954  

Description:

CS Class: MK-2
Cabside Class: MK-57 (MacA-57 after WWII)
Drive Wheel Diameter: 57 inches
Cylinders: 23-3/4x30 inches
Valve Gear: Walschaert
Maximum Tractive Effort: 47,945 pounds
Weight on Drivers: 206,200 pounds
Weight in Working Order (Engine Only): 263,000 pounds
Weight in Working Order (Engine and Tender): 430,700 pounds
Fuel: (see above)

General Notes:

a. Classes MK-1 and MK-2 were classed as Light Mikado; classes MK-3 through MK10 were classed as Heavy Mikado
b. All MK (Mikado) classes were changed to MacA (MacArthur) classes during World War II.
c. UP 1930, 1932-1937 and 1939-1946 were equipped with Duplex stokers, increasing their operating weight from 206,200 pounds to 210,000 pounds

Notes:

1. UP 1936 was built as UP 536 in 1911; to UP 1936 in 1915; vacated in 1947; sold to Spokane International 1936
   

OSL 2-8-2 -- 15 locomotives

1915 OSL
Number
First
Number
Builder Builder
Number
Date
Built
Fuel Date
Vacated
Notes
OSL 2000 OSL 1100 Baldwin 36362 Apr 1911 Coal Jun 1947 1
OSL 2001 OSL 1101 Baldwin 36363 Apr 1911 Oil Feb 1955  
OSL 2002 OSL 1102 Baldwin 36364 Apr 1911 Coal Nov 1954  
OSL 2003 OSL 1103 Baldwin 36365 Apr 1911 Coal Mar 1952  
OSL 2004 OSL 1104 Baldwin 36366 Apr 1911 Coal May 1947  
OSL 2005 OSL 1105 Baldwin 36367 Apr 1911 Coal Oct 1958 2
OSL 2006 OSL 1106 Baldwin 36368 Apr 1911 Coal Apr 1958  
OSL 2007 OSL 1107 Baldwin 36369 Apr 1911 Coal Mar 1948  
OSL 2008 OSL 1108 Baldwin 36370 Apr 1911 Oil Apr 1948  
OSL 2009 OSL 1109 Baldwin 36371 Apr 1911 Coal Mar 1948  
OSL 2010 OSL 1110 Baldwin 36277 Mar 1911 Coal Jun 1954  
OSL 2011 OSL 1111 Baldwin 36278 Mar 1911 Coal May 1947  
OSL 2012 OSL 1112 Baldwin 36279 Mar 1911 Coal May 1947  
OSL 2013 OSL 1113 Baldwin 36280 Mar 1911 Oil May 1955  
OSL 2014 OSL 1114 Baldwin 36281 Mar 1911 Coal Feb 1954  

Description:

CS Class: MK-1
Cabside Class: MK-57 (MacA-57 after World War II)
Drive Wheel Diameter: 57 inches
Cylinders: 23-3/4x30 inches
Maximum Tractive Effort: 47,945 pounds
Weight on Drivers: 208,450 pounds
Weight in Working Order (Engine Only): 267,850 pounds
Weight in Working Order (Engine and Tender): 433,450 pounds
Fuel: Coal

General Notes:

a. Classes MK-1 and MK-2 were classed as Light Mikado; classes MK-3 through MK10 were classed as Heavy Mikado
b. All MK (Mikado) classes were changed to MacA (MacArthur) classes during World War II.
c. OSL 2000, 2003, 2005, 2006, 2007, 2012 and 2014 were equipped with Duplex stokers, increasing their operating weight from 208,450 pounds to 210,000 pounds

Notes:

1. OSL 2000 was built as OSL 1100 in 1911; to OSL 2000 in 1915; vacated in 1947; sold to Spokane International 2000
2. OSL 2005 was built as OSL 1105 in 1911; to OSL 2005 in 1915; vacated in 1958; donated to City of Pocatello, Idaho, displayed in Ross Park
   

OSL 2-8-2 -- 20 locomotives

1915 OSL
Number
First
Number
Builder Builder
Number
Date
Built
Fuel Date
Vacated
OSL 2015 OSL 1115 Baldwin 38543 Oct 1912 Coal Aug 1952
OSL 2016 OSL 1116 Baldwin 38544 Oct 1912 Coal Nov 1954
OSL 2017 OSL 1117 Baldwin 38545 Oct 1912 Coal Feb 1949
OSL 2018 OSL 1118 Baldwin 38546 Oct 1912 Coal May 1947
OSL 2019 OSL 1119 Baldwin 38547 Oct 1912 Coal Nov 1954
OSL 2020 OSL 1120 Baldwin 38548 Oct 1912 Oil Mar 1949
OSL 2021 OSL 1121 Baldwin 38549 Oct 1912 Coal Apr 1954
OSL 2022 OSL 1122 Baldwin 38550 Oct 1912 Coal Jul 1947
OSL 2023 OSL 1123 Baldwin 38551 Oct 1912 Coal Nov 1954
OSL 2024 OSL 1124 Baldwin 38552 Oct 1912 Coal May 1947
OSL 2025 OSL 1125 Baldwin 38553 Oct 1912 Coal Jul 1954
OSL 2026 OSL 1126 Baldwin 38554 Oct 1912 Coal Nov 1954
OSL 2027 OSL 1127 Baldwin 38555 Oct 1912 Coal Mar 1949
OSL 2028 OSL 1128 Baldwin 38556 Oct 1912 Coal May 1947
OSL 2029 OSL 1129 Baldwin 38557 Oct 1912 Coal Dec 1947
OSL 2030 OSL 1130 Baldwin 38558 Oct 1912 Coal Jan 1956
OSL 2031 OSL 1131 Baldwin 38559 Oct 1912 Coal May 1947
OSL 2032 OSL 1132 Baldwin 38560 Oct 1912 Coal Sep 1947
OSL 2033 OSL 1133 Baldwin 38561 Oct 1912 Coal Apr 1954
OSL 2034 OSL 1134 Baldwin 38562 Oct 1912 Coal Aug 1953

Description:

CS Class: MK-2
Cabside Class: MK-57 (MacA-57 after World War II)
Drive Wheel Diameter: 57 inches
Cylinders: 23-3/4x30 inches
Maximum Tractive Effort: 47,945 pounds
Weight on Drivers: 208,450 pounds
Weight in Working Order (Engine Only): 267,850 pounds
Weight in Working Order (Engine and Tender): 433,450 pounds
Fuel: Coal

General Notes:

a. Classes MK-1 and MK-2 were classed as Light Mikado; classes MK-3 through MK10 were classed as Heavy Mikado
b. All MK (Mikado) classes were changed to MacA (MacArthur) classes during World War II.
c. OSL 2016, 2018, 2019, 2021, 2025, 2030, 2031, 2032, 2033 and 2034 were equipped with Duplex stokers, increasing their operating weight from 208,450 pounds to 210,000 pounds
   

OWRR&N Light 2-8-2 -- 1 locomotive

1915 OWRR&N
Number
First
Number
Second
Number
Builder Builder
Number
Date
Built
Fuel Date
Vacated
Notes
OWRR&N 2100 ORR&N 440 OWRR&N 500 Baldwin 34978 Jul 1910 Oil Jun 1955 1

Description:

CS Class: MK-1
Cabside Class: MK-57
Drive Wheel Diameter: 57 inches
Cylinders: 23-3/4x30 inches
Maximum Tractive Effort: 50,468 pounds
Weight on Drivers: 208,450 pounds (209,950 pounds as coal burner with Duplex stoker)
Weight in Working Order (Engine Only): 267,850 pounds (270,350 pounds as coal burner with Duplex stoker)
Weight in Working Order (Engine and Tender): 434,050 pounds (447,580 pounds as coal burner with Duplex stoker)
Fuel: Oil

General Notes:

a. Classes MK-1 and MK-2 were classed as Light Mikado; classes MK-3 through MK10 were classed as Heavy Mikado
b. All MK (Mikado) classes were changed to MacA (MacArthur) classes during World War II.

Notes:

1. OWRR&N 2100 was built as ORR&N 440 in 1910; to OWRR&N 500 in 1911; to OWRR&N 2100 in 1915; vacated in 1955
   

OWRR&N 2-8-2 -- 20 locomotives

1915 OWRR&N
Number
First
Number
Builder Builder
Number
Date
Built
Fuel   Date
Vacated
OWRR&N 2101 OWRR&N 501 Baldwin 36324 Apr 1911 Oil   Dec 1947
OWRR&N 2102 OWRR&N 502 Baldwin 36325 Apr 1911 Coal   Dec 1946
OWRR&N 2103 OWRR&N 503 Baldwin 36326 Apr 1911 Oil   Jul 1951
OWRR&N 2104 OWRR&N 504 Baldwin 36327 Apr 1911 Oil   Nov 1955
OWRR&N 2105 OWRR&N 505 Baldwin 36328 Apr 1911 Oil   Jun 1955
OWRR&N 2106 OWRR&N 506 Baldwin 36329 Apr 1911 Oil   Feb 1954
OWRR&N 2107 OWRR&N 507 Baldwin 36338 Apr 1911 Coal   Mar 1947
OWRR&N 2108 OWRR&N 508 Baldwin 36339 Apr 1911 Oil   Dec 1955
OWRR&N 2109 OWRR&N 509 Baldwin 36340 Apr 1911 Oil   Feb 1956
OWRR&N 2110 OWRR&N 510 Baldwin 36341 Apr 1911 Coal   May 1947
OWRR&N 2111 OWRR&N 511 Baldwin 36342 Apr 1911 Oil   Mar 1954
OWRR&N 2112 OWRR&N 512 Baldwin 36343 Apr 1911 Oil   Mar 1957
OWRR&N 2113 OWRR&N 513 Baldwin 36344 Apr 1911 Oil   Feb 1948
OWRR&N 2114 OWRR&N 514 Baldwin 36345 Apr 1911 Oil   Feb 1954
OWRR&N 2115 OWRR&N 515 Baldwin 36346 Apr 1911 Coal   Feb 1956
OWRR&N 2116 OWRR&N 516 Baldwin 36347 Apr 1911 Oil   Sep 1955
OWRR&N 2117 OWRR&N 517 Baldwin 36348 Apr 1911 Coal   Jan 1955
OWRR&N 2118 OWRR&N 518 Baldwin 36349 Apr 1911 Oil   Aug 1949
OWRR&N 2119 OWRR&N 519 Baldwin 36350 Apr 1911 Oil   Nov 1953
OWRR&N 2120 OWRR&N 520 Baldwin 36351 Apr 1911 Oil   Nov 1957

Description:

CS Class: MK-1
Cabside Class: MK-57
Drive Wheel Diameter: 57 inches
Cylinders: 23-3/4x30 inches
Maximum Tractive Effort: 50,468 pounds
Weight on Drivers: 208,450 pounds (209,950 pounds as coal burner with Duplex stoker)
Weight in Working Order (Engine Only): 267,850 pounds (270,350 pounds as coal burner with Duplex stoker)
Weight in Working Order (Engine and Tender): 434,050 pounds (447,580 pounds as coal burner with Duplex stoker)
Fuel: (see above)

General Notes:

a. OWRR&N 2101-2120 were ordered as Oregon Railroad & Navigation Company 501-520, but delivered in April 1911 as OWRR&N 501-520 after the OWRR&N consolidation in December 1910.
c. Classes MK-1 and MK-2 were classed as Light Mikado; classes MK-3 through MK10 were classed as Heavy Mikado
d. All MK (Mikado) classes were changed to MacA (MacArthur) classes during World War II.
e. OWRR&N 2103 was equipped with a booster trailing truck, adding about 10,500 pounds to its maximum tractive effort
   

OWRR&N 2-8-2 -- 20 locomotives

1915 OWRR&N
Number
First
Number
Builder Builder
Number
Date
Built
Fuel Date
Vacated
Notes
OWRR&N 2121 OWRR&N 521 Baldwin 36237 Mar 1911 Oil Mar 1957  
OWRR&N 2122 OWRR&N 522 Baldwin 36238 Mar 1911 Oil Dec 1953  
OWRR&N 2123 OWRR&N 523 Baldwin 36239 Mar 1911 Oil Nov 1947  
OWRR&N 2124 OWRR&N 524 Baldwin 36240 Mar 1911 Coal Jun 1953  
OWRR&N 2125 OWRR&N 525 Baldwin 36241 Mar 1911 Coal Mar 1955  
OWRR&N 2126 OWRR&N 526 Baldwin 36242 Mar 1911 Coal Feb 1954  
OWRR&N 2127 OWRR&N 527 Baldwin 36243 Mar 1911 Coal Mar 1947  
OWRR&N 2128 OWRR&N 528 Baldwin 36244 Mar 1911 Coal Oct 1947  
OWRR&N 2129 OWRR&N 529 Baldwin 36245 Mar 1911 Oil May 1947  
OWRR&N 2130 OWRR&N 530 Baldwin 36246 Mar 1911 Coal May 1947  
OWRR&N 2131 OWRR&N 531 Baldwin 36322 Apr 1911 Coal May 1947  
OWRR&N 2132 OWRR&N 532 Baldwin 36323 Apr 1911 Oil Dec 1947  
OWRR&N 2133 OWRR&N 533 Baldwin 36330 Apr 1911 Oil Jul 1956  
OWRR&N 2134 OWRR&N 534 Baldwin 36331 Apr 1911 Oil Mar 1954  
OWRR&N 2135 OWRR&N 535 Baldwin 36332 Apr 1911 Oil Feb 1948  
OWRR&N 2136 OWRR&N 536 Baldwin 36333 Apr 1911 Oil May 1947 1
OWRR&N 2137 OWRR&N 537 Baldwin 36334 Apr 1911 Coal Nov 1953  
OWRR&N 2138 OWRR&N 538 Baldwin 36335 Apr 1911 Oil Mar 1954  
OWRR&N 2139 OWRR&N 539 Baldwin 36336 Apr 1911 Coal May 1947  
OWRR&N 2140 OWRR&N 540 Baldwin 36337 Apr 1911 Oil Oct 1954  

Description:

CS Class: MK-1
Cabside Class: MK-57
Drive Wheel Diameter: 57 inches
Cylinders: 23-3/4x30 inches
Maximum Tractive Effort: 50,468 pounds
Weight on Drivers: 208,450 pounds (209,950 pounds as coal burner with Duplex stoker)
Weight in Working Order (Engine Only): 267,850 pounds (270,350 pounds as coal burner with Duplex stoker)
Weight in Working Order (Engine and Tender): 434,050 pounds (447,580 pounds as coal burner with Duplex stoker)
Fuel: (see above)

General Notes:

a. Ordered as O&W 300-319; delivered in March and April 1911 as OWRR&N 521-540
b. OWRR&N 2138 was equipped with tender booster in 1926; removed in 1936-1939; 10,960 pounds additional tractive effort
c. Classes MK-1 and MK-2 were classed as Light Mikado; classes MK-3 through MK10 were classed as Heavy Mikado
d. All MK (Mikado) classes were changed to MacA (MacArthur) classes during World War II.
e. OWRR&N 2138 was equipped with a booster trailing truck, adding about 10,500 pounds to its maximum tractive effort

Notes:

1. OWRR&N 2136 was vacated at Baker, Oregon in May 1947 and sold to Mount Hood Railroad no. 36 at Hood River, Oregon.
   

OWRR&N 2-8-2 -- 15 locomotives

1915 OWRR&N
Number
First
Number
Builder Builder
Number
Date
Built
Fuel Date
Vacated
OWRR&N 2141 OWRR&N 541 Baldwin 38293 Sep 1912 Coal Nov 1953
OWRR&N 2142 OWRR&N 542 Baldwin 38294 Sep 1912 Coal Nov 1947
OWRR&N 2143 OWRR&N 543 Baldwin 38328 Sep 1912 Coal May 1947
OWRR&N 2144 OWRR&N 544 Baldwin 38329 Sep 1912 Coal May 1947
OWRR&N 2145 OWRR&N 545 Baldwin 38330 Sep 1912 Oil Dec 1957
OWRR&N 2146 OWRR&N 546 Baldwin 38331 Sep 1912 Coal May 1947
OWRR&N 2147 OWRR&N 547 Baldwin 38332 Sep 1912 Oil Oct 1954
OWRR&N 2148 OWRR&N 548 Baldwin 38333 Sep 1912 Oil Feb 1956
OWRR&N 2149 OWRR&N 549 Baldwin 38334 Sep 1912 Oil Nov 1947
OWRR&N 2150 OWRR&N 550 Baldwin 38356 Sep 1912 Oil Jun 1954
OWRR&N 2151 OWRR&N 551 Baldwin 38357 Sep 1912 Oil Oct 1957
OWRR&N 2152 OWRR&N 552 Baldwin 38358 Sep 1912 Oil Mar 1949
OWRR&N 2153 OWRR&N 553 Baldwin 38359 Sep 1912 Oil Dec 1947
OWRR&N 2154 OWRR&N 554 Baldwin 38360 Sep 1912 Oil Apr 1948
OWRR&N 2155 OWRR&N 555 Baldwin 38361 Sep 1912 Oil Dec 1947

Description:

CS Class: MK-2
Cabside Class: MK-57
Drive Wheel Diameter: 57 inches
Cylinders: 23-3/4x30 inches
Maximum Tractive Effort: 50,468 pounds
Weight on Drivers: 208,450 pounds (209,950 pounds as coal burner with Duplex stoker)
Weight in Working Order (Engine Only): 267,850 pounds (270,350 pounds as coal burner with Duplex stoker)
Weight in Working Order (Engine and Tender): 434,050 pounds (447,580 pounds as coal burner with Duplex stoker)
Fuel: (see above)

General Notes:

a. OWRR&N 2147, 2149, 2151, 2152, 2154 were equipped with tender boosters in 1926; removed in 1936-1939; 10,960 pounds additional tractive effort
b. Classes MK-1 and MK-2 were classed as Light Mikado; classes MK-3 through MK10 were classed as Heavy Mikado
c. All MK (Mikado) classes were changed to MacA (MacArthur) classes during World War II.
d. OWRR&N 2149, 2151, 2152, 2154 were equipped with a booster trailing truck, adding about 10,500 pounds to their maximum tractive effort
   

OWRR&N 2-8-2 -- 10 locomotives

1915 OWRR&N
Number
First
Number
Builder Builder
Number
Date
Built
Fuel Date
Vacated
OWRR&N 2156 OWRR&N 556 Baldwin 39905 May 1913 Oil Mar 1948
OWRR&N 2157 OWRR&N 557 Baldwin 39906 May 1913 Oil Jan 1958
OWRR&N 2158 OWRR&N 558 Baldwin 39907 May 1913 Coal Mar 1948
OWRR&N 2159 OWRR&N 559 Baldwin 39908 May 1913 Oil Jun 1955
OWRR&N 2160 OWRR&N 560 Baldwin 39909 May 1913 Coal Feb 1953
OWRR&N 2161 OWRR&N 561 Baldwin 39910 May 1913 Oil Jan 1957
OWRR&N 2162 OWRR&N 562 Baldwin 39911 May 1913 Coal Oct 1947
OWRR&N 2163 OWRR&N 563 Baldwin 39912 May 1913 Oil May 1947
OWRR&N 2164 OWRR&N 564 Baldwin 39913 May 1913 Oil Jul 1956
OWRR&N 2165 OWRR&N 565 Baldwin 39914 May 1913 Oil Apr 1954

Description:

CS Class: MK-2
Cabside Class: MK-57
Drive Wheel Diameter: 57 inches
Cylinders: 23-3/4x30 inches
Maximum Tractive Effort: 50,468 pounds
Weight on Drivers: 208,450 pounds (209,950 pounds as coal burner with Duplex stoker)
Weight in Working Order (Engine Only): 267,850 pounds (270,350 pounds as coal burner with Duplex stoker)
Weight in Working Order (Engine and Tender): 434,050 pounds (447,580 pounds as coal burner with Duplex stoker)
Fuel: (see above)

General Notes:

a. Classes MK-1 and MK-2 were classed as Light Mikado; classes MK-3 through MK10 were classed as Heavy Mikado
b. All MK (Mikado) classes were changed to MacA (MacArthur) classes during World War II.
c. OWR&N 2165 was equipped with train signals and steam heating for passenger service, adding about 1,000 pounds to its weight-on-drivers, about 5,000 pounds to its total engine weight, and about 9,000 pounds to its total engine and tender weight
   

OWRR&N 2-8-2 -- 6 locomotives

1915 OWRR&N
Number
Builder Builder
Number
Date
Built
Date
Vacated
Notes
OWRR&N 2166 Baldwin 49473 Aug 1918 Mar 1947 1
OWRR&N 2167 Baldwin 49474 Aug 1918 Feb 1956  
OWRR&N 2168 Baldwin 49663 Aug 1918 Jan 1957  
OWRR&N 2169 Baldwin 49664 Aug 1918 Dec 1947  
OWRR&N 2170 Baldwin 49734 Aug 1918 Jul 1954  
OWRR&N 2171 Baldwin 50207 Oct 1918 Jul 1956  

Description:

CS Class: MK-8
Cabside Class: MK-63
Drive Wheel Diameter: 63 inches
Cylinders: 26x28 inches
Maximum Tractive Effort: 51,075 pounds
Weight on Drivers: 209,300 pounds
Weight in Working Order (Engine Only): 273,000 pounds
Weight in Working Order (Engine and Tender): 475,200 pounds
Fuel: Oil

General Notes:

  OWRR&N 2166-2168 were equipped with train signals and steam heating for passenger service
a. OWRR&N 2169, 2170, 2171 were equipped with tender boosters in 1926; removed in 1936-1939; 10,960 pounds additional tractive effort
b. Classes MK-1 and MK-2 were classed as Light Mikado; classes MK-3 through MK10 were classed as Heavy Mikado
c. All MK (Mikado) classes were changed to MacA (MacArthur) classes during World War II.
d. OWR&N 2166-2168 were equipped with train signals and steam heating for passenger service, adding about 1,000 pounds to their weight-on-drivers, about 5,000 pounds to their total engine weight, and about 9,000 pounds to their total engine and tender weight
e. OWRR&N 2169-2171 were equipped with a booster trailing truck, adding about 10,500 pounds to their maximum tractive effort

Notes:

1. OWRR&N 2166 was wrecked on January 2, 1947 at Auburn, Washington

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