Union Pacific Railroad

Index For This Page

Timeline of Motive Power, 1862-1915

This page was last updated on January 16, 2023.

(Return to UP Steam Roster Index Page)

Definitions

The "Added" column includes locomotives that were delivered new to Union Pacific, or its predecessor companies or branch roads. Only the initial road number is used and shown. Changes due to rebuilding or renumbering are not included. Transfers between UP and its predecessor companies and branch roads are included, because these locomotives usually ended up back in UP's roster.

The "Vacated" column includes locomotives that were retired by UP or its subsidiaries. Only the final road number is used and shown. Changes due to rebuilding or renumbering are not included. The term "Vacated" is the term used by Union Pacific in its internal documents, with locomotives being removed from service and scrapped, or sold to a subsidiary, branch road, or sold to an outside company.

Not Complete

Full histories for individual locomotives are not included. For individual locomotive histories, see the UP Steam Roster Index Page.

(Go to the Main UP Steam Roster Index Page)

Rebuilding

Union Pacific almost from its first year of operation, made regular attempts to improve the performance of its locomotives. This usually included a rebuilding that changed the driver diameter, or the cylinder sizes, or both. This was the same for its predecessor companies and its various branch roads. Upon completion of a rebuilding, which may or may not have included a new boiler, and a new frame, the locomotive would either keep its previous road number, or it would be renumbered as part of a program. Active research by numerous persons has only found a very small number of records of these rebuildings. The various rebuildings are not included in this timeline.

(Read more about UP's steam locomotive rebuilding)

Renumbering

Locomotives on Union Pacific and its predecessor companies and branch roads, were regularly renumbered due to a change in assignment, or to make way for a new series of more modern locomotives. The various renumberings are not included in this timeline.

(Read more about UP's steam locomotive renumbering)

Predecessors and Branch Roads

UP In Utah -- Information about the predecessor companies and branch roads in Utah. Includes the Utah roads, and OSL in Utah and Idaho, and LA&SL in Utah, Nevada and California.

UP Not In Utah -- Information about the subsidiaries and predecessor companies, and branch roads not in Utah. Includes roads in Wyoming, Washington, Oregon, Nebraska, and Kansas, including Kansas Pacific.

Timeline

1862

Union Pacific Rail Road was chartered by the U. S. Congress in 1862.

1863

Union Pacific Rail Road was organized in New York City in 1863.

Union Pacific Eastern District (UPED) began construction in September 1863. The road's first locomotive (UPED #1 "Wyandotte") arrived in December 1863. UPED became the Kansas Pacific in 1869.

1864

Union Pacific Rail Road started construction in 1864, but the first track was not laid until 1865. The road's first five locomotives were delivered in mid 1864, but no tracks were laid until July 1965. Two of the original five locomotives were sold as surplus in December 1864, and the remaining three locomotives were sold to the railroad's construction contractor.

Added (xx) 2 4-4-0 UPED 2, 3 (later Kansas Pacific)
  1 4-4-0 (no name, no number)
  1 4-4-0 (no name, no number)
  1 4-4-0 "General Grant"
  1 4-4-0 "General McPherson" (UPRR 2)
  1 4-4-0 "General Sherman" (UPRR 1)
       
Vacated 1 4-4-0 (no name, no number) (Sold as surplus)
  1 4-4-0 (no name, no number) (Sold construction contractor; returned to UP in 1867) (Later UPRR 3)
  1 4-4-0 "General Grant" (Sold as surplus; sold to UPED 3)
  1 4-4-0 "General McPherson" (UPRR 2) (Sold construction contractor; returned to UP in 1867)
  1 4-4-0 "General Sherman" (UPRR 1) (Sold construction contractor; returned to UP in 1867)

1865

Added 2 4-6-0 UPED 4, 5 (later Kansas Pacific)
  1 4-4-0 "Admiral Farragut" (UPRR 5)
  1 4-4-0 "Black Hawk" (UPRR 6) (Purchased second-hand)
  1 4-4-0 "General Sheridan" (UPRR 4)
       
Vacated (0)      

1866

Added 1 0-4-0T "Colorado" (UPRR 11)
  1 2-6-0 "Bellevue" (UPRR 12)
  11 4-4-0 UPED 6-16 (later Kansas Pacific)
  1 4-4-0 "Omaha" (UPRR 7)
  1 4-4-0 "Idaho" (UPRR 8)
  1 4-4-0 "Osceola" (UPRR 9)
  1 4-4-0 "Denver" (UPRR 10)
  3 4-4-0 UPRR 16-18
  1 4-4-0 UPRR 19 (1st) (to UPRR 13, 1867)
  1 4-4-0 UPRR 19 (2nd)
  1 4-4-0 UPRR 20 (1st) (to UPRR 14, 1867)
  1 4-4-0 UPRR 20 (2nd)
  1 4-4-0 UPRR 21 (1st) (to UPRR 5, 1867)
       
Vacated (0)      

1867

UP's first 14 locomotives were delivered in 1865 and 1866 without road numbers; 12 received names. In 1866 UP received an additional eight locomotives, which did have road numbers. In 1867 the 12 named locomotives were given road numbers UP 1 through 12.

(Read more about UP's named locomotives)

Added (xx) 1 4-4-0 "General Sherman" (UPRR 1) (Returned from construction contractor as UPRR 1)
  1 4-4-0 "General McPherson" (UPRR 2) (Returned from construction contractor as UPRR 2)
  1 4-4-0 (no name, no number) (UPRR 3) (Returned from construction contractor as UPRR 3)
  9 4-4-0 UPED 17-25 (later Kansas Pacific)
  26 4-4-0 UPRR 22-47
  1 4-4-0 UPRR 53 (2nd) (purchased from construction contractor)
  4 4-4-0 UPRR 53-56
  2 4-6-0 UPRR 51, 52 (purchased from construction contractor)
       
Vacated (0)      

1868

Colorado Central Railroad began construction in 1867, and began operation in 1868.

The "Pony" engines were small locomotives used as yard switchers in Omaha and Cheyenne.

Added 4 4-4-0 UPED 26-29 (later Kansas Pacific)
  3 0-4-0T UPRR Pony #2, #3, #4
  3 2-8-0 UPRR 113-115
  1 4-4-0 UPRR 21 (2nd)
  3 4-4-0 UPRR 48-50
  56 4-4-0 UPRR 57-112
  15 4-4-0 UPRR 116-130
  25 4-6-0 UPRR 88-112
       
Vacated 1 4-4-0 UPRR 3 (1st) (Sold to Colorado Central)

1869

Union Pacific Eastern District (UPED) was changed to Kansas Pacific (KP) in 1869.

Utah Central Rail Road (UCRR) began construction in 1868 and began operation in 1869 (later to OSL&UN).

Added 12 4-4-0 KP 30-41 (Kansas Pacific)
  1 4-4-0T UPRR Pony #5
  16 4-4-0 UPRR 131-146
  6 4-4-0 UPRR 156-161
       
Vacated 8 4-4-0 UPRR 133-140 (1st) (Sold prior to delivery; numbers remained blank until 1874)
  1 4-4-0 UPRR 15 (Sold to Utah Central)

1870

Added 5 4-4-0 DP 24-28 (Denver Pacific)
  40 4-4-0 KP 42-82
  3 4-4-0 UCRR 2-4 (Utah Central)
  4 4-4-0 UPRR 162-165
       
Vacated 1 4-4-0 UPRR 54 (Sold to construction contractor)
  1 4-6-0 UPRR 56 (1st) (Sold to Colorado Central)

1871

Utah Southern Railroad began operations in 1871 (later to OSL&UN).

Added 1 4-4-0 DP 23
  6 4-4-0 KP 83-88
  1 4-4-0 UCRR 5
       
Vacated 1 4-4-0 UPRR 6 (Sold to Colorado Central)
  1 4-4-0 UPRR 14 (Sold to Utah Southern)

1872

Added (0)      
       
Vacated 1 4-4-0 UPRR 2 (Sold to Colorado Central)

1873

Added (0)      
       
Vacated 2 4-4-0 UPRR 49, 144 (Sold to Utah Southern)

1874

Added 8 4-6-0 UPRR 133-140 (all 2nd)
  2 4-6-0 UPRR 147, 148
       
Vacated 1 4-4-0 UPRR 60 (Sold to Colorado Central)

1875

Added 7 4-4-0 UPRR 149-155
  5 4-4-0 UPRR 166-170
       
Vacated (0)      

1876

Omaha & Republican Valley Railroad began construction in 1876, and began operating in 1877. (To UP in 1898)

Added (0)      
       
Vacated 1 4-4-0 UPRR 13 (Sold to Omaha & Republican Valley)

1878

Added 5 4-4-0 KP 90-94
  10 4-6-0 UPRR 171-180
  1 4-4-0 USRR 4 (Utah Southern)
       
Vacated 2 4-6-0 UPRR 91, 92 (Sold to Colorado Central)
  2 4-4-0 UPRR 160, 161 (Sold to Colorado Central)

1879

Omaha, Niobrara & Black Hills Railroad began construction 1879 and began operating also in 1879. (To UP in 1898)

Marysville & Blue Valley Railroad began construction 1879 and began operating also in 1879. (To UP in 1898)

Oregon Railway & Navigation Company (ORy&N) was organized 1879 as a consolidation of several Oregon railroads and steam ship companies.

Added 1 0-6-0 KP 101
  6 4-4-0 KP 95-100
  10 4-6-0 UPRR 181-190
       
Vacated 4 4-4-0 UPRR 65, 123, 125, 145 (Sold to Utah Southern Railroad Extension)

1880

In January 1880, Union Pacific Rail Road (UPRR) was consolidated with Kansas Pacific Railway and Denver Pacific Railway to form the Union Pacific Railway (UPRy). Kansas Pacific continued as a separate road until the 1885 renumbering.

Added 8 4-6-0 KP 102-109
  5 2-6-0 ORy&N 1-5 (all 1st) (Oregon Railway & Navigation)
  2 4-4-0 ORy&N 1, 2 (both 2nd)
  28 4-6-0 UPRy 191-218
    4-4-0 USRR 5
       
Vacated 1 2-6-0 UPRR 12 (Sold to Utah Southern Railroad Extension)
  1 4-4-0 UPRR 129 (Sold to Marysville & Blue Valley)
  2 4-4-0 UPRR 56 (2nd), 124 (Sold to Omaha, Niobrara & Black Hills)
  5 4-4-0 UPRR 1, 36, 53, 79, 83 (Sold to Omaha & Republican Valley)

1881

Oregon Short Line Railway (OSLRy) began construction in 1881, and began operating that same year using Union Pacific locomotives.

Utah Central Railway (UCRy) was the consolidation in 1881 of Utah Central Rail Road (UCRR), Utah Southern Railroad (USRR) and Utah Southern Railroad Extension (USRRE).

Added 10 4-4-0 ORy&N 14-23
  2 4-4-0 ORy&N 43, 44
  15 2-8-0 UPRy 219-232, 233 (2nd)
  26 4-6-0 UPRy 233 (1st), 234-258
    4-6-0 USRR 6
    4-6-0 USRR 7
       
Vacated 2 4-4-0 ORy&N 16, 17 (Diverted prior to delivery)
  2 4-6-0 UPRy 51, 55 (Sold)

1882

Added 1 4-4-0 KP 110
  1 0-4-0T ORy&N 52
  1 2-6-0 ORy&N 51
  13 4-4-0 ORy&N 24-36
  4 4-4-0 ORy&N 45-48
  6 4-4-0 ORy&N 53-58
  2 4-6-0 UCRy 19, 20
  7 2-8-0 UPRy 125, 144, 145, 260-263
  6 4-6-0 UPRy 49, 51, 54, 55, 65, 123
       
Vacated 3 4-4-0 ORy&N 24, 25, 31 (Diverted prior to delivery)
  3 4-4-0 UPRy 4, 5, 20 (Sold to Oregon Short Line Railway, OSLRy)
  4 4-4-0 UPRy 29, 30, 31, 32 (Sold to Colorado Central, Julesburg Branch)
  6 4-6-0 UPRy 236, 237, 241, 251, 257 (1st), 258 (1st) (Sold to Colorado Central, Julesburg Branch)

1883

Added 12 4-4-0 ORy&N 59-70
  3 4-4-0 ORy&N 79-81
  8 4-6-0 ORy&N 71-78
  6 4-6-0 OSLRy 30-35 (Oregon Short Line Railway)
  1 4-6-0 UCRy 21
  15 2-8-0 UPRy 264-278
       
Vacated (0)      

1884

Added 4 4-6-0 UPRy 246, 251, 257, 258
       
Vacated (0)      

1885

1885 System-Wide Renumbering -- All of Union Pacific's associated and controlled branch roads and feeder lines each had their own individual numbering patterns. Within the 16 companies, it was reported that there were 10 engines with the number 1. By 1885 the Union Pacific empire had reached a size that there were confusing ranges of equipment numbers that made centralized management very difficult. On June 1, 1885, a new numbering pattern for all locomotives and cars went into effect. This included all of the roads in Nebraska, Kansas and Wyoming. In Utah and Idaho this included Oregon Short Line Railway, but not the Utah Central Railway. It also included the roads in Oregon and Washington.

Added 1 0-4-0T UPRR Pony #6
       
Vacated 1 4-4-0T Pony #5

1886

Omaha & Republican Valley Railway was a consolidation of Omaha & Republican Valley Railroad and Omaha, Niobrara & Black Hills Railroad in 1886. (To UP in 1898)

Added 10 2-8-0 UPRy 1301-1310 (Camelback, with Wooten firebox)
  15 4-4-0 UPRy 711-725
       
Vacated 2 0-4-0T Pony #1, Pony #6
  3 4-4-0 UPRy 327, 391, 1398

1887

Added 5 4-4-0 OSLRy 746-750
  20 4-4-0 U&N 726-735, 751-760
  10 0-6-0 UPRy 1151-1160
  1 2-8-0 UPRy 1311
  10 4-4-0 UPRy 736-745
  10 4-4-0 UPRy 761-770 (Camelback, with Wooten firebox)
       
Vacated 2 4-4-0 UPRy 303, 304
  5 4-4-0 UPRy 365, 366, 431, 432, 433 (Sold to Cheyenne & Northern)

1888

Added 4 2-8-0 ORy&N 82, 84-86
  1 2-8-0 ORyE 83 (Oregon Railway Extension)
  10 0-6-0 UPRy 1161-1170
  67 4-4-0 UPRy 660-676, 680-700, 771-799
       
Vacated 1 0-4-0T Pony #4
  6 4-4-0 UPRy 321, 322, 1008, 1385, 1386, 1387

1889

Oregon Short Line & Utah Northern Railway (OSL&UN) was organized in 1889 as a consolidation of OSLRy, Utah Central, Utah & Northern, and several branch roads in Utah and Idaho.

Added 2 2-6-0 ORyE 87, 88 (Oregon Railway Extension)
  7 2-6-0 ORy&N 89-95
  5 4-6-0 ORy&N 45, 46, 48, 49, 50
  1 4-6-0 ORyE 47 (Oregon Railway Extension)
  53 4-4-0 UPRy 610-659, 677-679
       
Vacated 1 0-4-0T Pony #3
  3 4-4-0 UPRy 323, 349, 351

1890

Union Pacific purchased controlling interest of Oregon Railway & Navigation (ORy&N) in 1889 and in 1890 all ORy&N locomotives were renumbered into UP's 1885 system-wide numbering pattern. This numbering pattern remained in effect until 1894 when as part of UP's 1893 restructuring and receivership, ORy&N was released and became an independent company under its own control, including a new numbering pattern for its locomotives.

In July 1894 the ORy&N entered its own receivership, with the intention of the road being independent from Union Pacific, along with releasing it from its lease to Oregon Short Line & Utah Northern.

"Old records in UP Motive Power Dept. state that the UP received 10, 2-6-0's from the Kansas City & Omaha Railroad in January, 1890. These locomotives were numbered 27-36 and had been built by the New York (Rome ) Locomotive Works. No further infermation concerning these ten locomotives or of the KC&O Railroad are available to the authors ." (Motive Power of the Union Pacific, Kratville and Ranks, 1960)

Added 13 4-6-0 OSL&UN 1416-1428
  27 0-6-0 UPRy 1100-1111, 1171-1185
  15 2-8-0 UPRy 1600-1614
  10 4-4-0 UPRy 600-609, 829
  54 4-6-0 UPRy 1400-1404, 1429-1440, 1471-1481, 1500-1508, 1809-1816
       
Vacated 1 0-4-0T Pony #2
  1 4-4-0 UPRy 310
  1 4-4-0 UPRy 300 (Sold to K&BH)

1891

Added 40 4-6-0 OSL&UN 1441-1470
  1 0-6-0 UPRy 1186
  4 4-6-0 UPRy 1482-1485
       
Vacated 4 2-6-0 ORy&N 1369-1372

1891

Added (0)      
       
Vacated (0)      

1893

Added (0)      
       
       
Vacated 1 4-6-0 UPRy 926 (To STJ&GI)

1894

Added (0)      
       
Vacated 2 4-4-0 UPRy 350, 1390 (Vacated between 1889 and 1894)
  1 4-4-0 ORy&N 358 (Vacated between 1890 and 1894)

1895

Added 1 0-6-0 ORy&N 20
  4 4-6-0 ORy&N 148-151
       
Vacated 1 4-4-0 OSL 368 (Vacated after 1894)
  1 4-4-0 UPRy 822 (Vacated after 1894)
  2 4-4-0 UPRy 311, 396 (Vacated between 1894 and 1898)

1896

Oregon Railroad & Navigation Company (ORR&N) was organized to purchase the Oregon Railway & Navigation (ORy&N) and its subsidiary and leased companies.

1896

Added (0)      
       
Vacated 1 2-6-0 ORR&N 17 (Vacated after 1895)
  3 4-4-0 UPRy 512, 561, 574
  8 4-6-0 UPRy 902, 910, 927, 929, 939, 940, 951, 1006

1897

Oregon Short Line Railroad (OSL) was organized to purchase the OSL&UN.

During the 1897-1902 time period, OSL rebuilt numerous of its locomotives in an effort to upgrade and modernize its fleet. The actual records of the road's mechanical department were destroyed in an explosion and fire at the Salt Lake City headquarters on September 10, 1901. The true and exact histories of many of the 500-series and 600-series locomotives may never be accurately known.

Added 5 4-6-0 ORR&N 152-156
  3 2-8-0 OSL 800-802
       
Vacated 1 4-4-0 ORR&N 43 (Sold)
  1 4-4-0 ORR&N 44 (Sold)
  4 4-4-0 UPRy 481, 494, 572, 578
  1 4-6-0 OSL 515 (Sold)

1898

In January 1898, the bankrupt Union Pacific Railway (UPRy) was reorganized as the Union Pacific Railroad (UP).

Added 3 2-8-0 ORR&N 200-202
  8 2-8-0 UP 1312-1319
  2 2-8-0 UP 1320, 1321 (Schenectady compound)
       
Vacated 1 4-4-0 OSL 102 (Vacated after 1897)
  6 4-4-0 UP 315, 336, 390, 488, 494, 506 (Vacated after 1897)
Vacated 11 4-4-0 UPRy 340, 503, 511, 513, 515, 518, 580, 583, 597, 801, 810
  5 4-6-0 UPRy 900, 901, 908, 915, 919
  2 4-6-0 UP 1025, 1383 (Vacated after 1897)

1899

Added 4 2-8-0 OSL 1000-1003
  16 4-6-0 OSL 720-727, 750-757
  7 4-8-0 OSL 900-906
  8 4-8-0 UP 1500-1507
  40 4-6-0 UP 1703-1742
       
Vacated 3 2-6-0 UP 1200-1202
  1 2-8-0 UP 1264
  18 4-4-0 UP 338, 479, 487, 493, 505, 514, 516, 519, 520, 567,
570, 581, 800, 802, 803, 811, 814, 823
  6 4-4-0 UP 497, 501, 502, 527, 685, 689 (Vacated after 1898)
  9 4-6-0 UP 903, 911, 914, 917, 946, 986, 994, 1002, 1011

1900

Eighty (80) of the locomotives delivered in 1900 were Baldwin Vauclain compound locomotives. (Read more about Vauclain compound locomotives)

Added 60 2-8-0 UP 1621-1680 (Vauclain compound)
  20 4-6-0 UP 1820-1839 (Vauclain compound)
       
Vacated 1 2-6-0 ORR&N 11 (Sold to Tacoma Eastern)
  7 2-8-0 UP 1253, 1255, 1259, 1261, 1273, 1282, 1289
  6 2-8-0 UP 1260, 1265, 1267, 1268, 1270, 1283 (All six sold to ORR&N)
  9 4-4-0 UP 335, 504, 562, 633, 663, 699, 806, 813, 821
  1 4-6-0 OSL 516
  1 4-6-0 OSL 519 (Sold to Pacific & Idaho Northern)
  23 4-6-0 UP 904, 918, 933, 944, 949, 952, 954, 955, 956, 990,
992, 993, 997, 1001, 1003, 1007, 1012, 1014, 1015, 1016,
1017, 1034, 1036

1901

Seventy-nine (79) of the locomotives delivered in 1901 were Baldwin Vauclain compound locomotives. (Read more about Vauclain compound locomotives)

Added 2 0-6-0 ORR&N 25, 26
  10 0-6-0 OSL 560, 561, 580-587
  10 0-6-0 UP 1187-1196
  8 2-6-0 OSL 770-777 (Vauclain compound)
  10 2-8-0 ORR&N 300-309 (Vauclain compound)
  15 2-8-0 OSL 950-964 (Vauclain compound)
  1 2-8-0 OSL 1004
  20 2-8-0 UP 1680-1699 (Vauclain compound)
  6 4-6-0 ORR&N 400-405 (Vauclain compound)
  2 4-6-0 SPLA&SL 200, 201
  20 4-6-0 UP 1840-1859 (Vauclain compound)
       
Vacated 1 2-6-0 UP 1203
  7 2-8-0 UP 1258, 1266, 1271, 1276, 1279, 1284, 1285
  4 4-4-0 ORR&N 49, 50, 56, 63
  1 4-4-0 OSL 103
  40 4-4-0 UP 489, 492, 500, 517, 601, 618, 620, 621, 625, 631,
636, 639, 641, 648, 650, 651, 655, 658, 662, 668,
669, 677, 678, 682, 686, 695, 698, 709, 719, 721,
722, 725, 738, 739, 781, 782, 805, 809, 836, 839
  4 4-6-0 OSL 500, 501, 509, 510
  12 4-6-0 UP 923, 930, 935, 945, 947, 953, 989, 991, 995, 996,
998, 1032

1902

Twenty-four (24) of the locomotives delivered in 1902 were Baldwin Vauclain compound locomotives. (Read more about Vauclain compound locomotives)

Added 2 0-6-0 SPLA&SL 11, 12
  14 2-8-0 UP 1508-1521 (Vauclain compound) (Five to ORR&N 340-344 in 1904)
  10 4-6-0 OSL 400-409 (Vaulclain compound) (Renumbered to OSL 800-809 upon delivery)
  4 4-6-0 SPLA&SL 202-205
       
Vacated 2 2-8-0 UP 1251, 1272
  6 4-4-0 ORR&N 30, 36, 39, 41, 48, 51
  1 4-4-0 OSL 314
  32 4-4-0 UP 394, 482, 485, 486, 553, 571, 575, 595, 598, 599,
600, 623, 626, 628, 629, 642, 649, 652, 653, 654,
675, 683, 691, 692, 697, 701, 716, 724, 736, 744,
771, 784, 791, 804
  1 4-6-0 OSL 508
  2 4-6-0 UP 932, 1005

1903

The sale of OSL lines south of Salt Lake City to the San Pedro Los Angeles & Salt Lake in 1903 included the sale of 17 OSL locomotives, including 15 rod locomotives for mainline use and the two Shay locomotives for switching at Tintic.

Fifty (50) of the locomotives delivered in 1903 were Baldwin Vauclain compound locomotives. (Read more about Vauclain compound locomotives)

Twenty-nine (29) of the locomotives delivered in 1903 were the first of the Harriman CS Common Standard locomotives.

Harriman Common Standard -- These "CS" (Common Standard) designations were not used prior to the Harriman Era (first locomotives delivered in 1903), and seldom used after the MK-10 2-8-2s were delivered in 1921. When referred to as the CS class, such as C-2, C-3, etc., it means the class was the second and third variation of the 2-8-0 Consolidation class, using Harriman-era Common Standard specifications. The CS classes were used for the Consolidation 2-8-0s (C-1 and C-2), the Pacific 4-6-2s (P-1 to P-13), the Ten-Wheeler 4-6-0s (T-1 to T-3), the Atlantic 4-4-2s (A-1 to A-4), the Mikado 2-8-2 (MK-1 to MK-10), and the 0-6-0 switchers (S-1 to S-6). The CS class was not applied to the locomotives themselves, but continued to be used into the 1940s on some internal mechanical department documents, but only for these classes already mentioned.

Prior to the Harriman Common Standard era, starting in the mid 1880s, locomotives were classed by wheel arrangement, and driver size in inches. S for Switch (0-6-0), C for Consolidation (2-8-0) and E for Eight-wheel (4-4-0).

After 1920, all locomotives were classed by their wheel arrangement and their driver size. This includes the cab-side class. The diagram books from the early 1920s and through to the last revisions in 1949, only use the wheel arrangement and driver size.

Added 1 0-6-0 ORR&N 27
  5 2-8-0 ORR&N 310-314 (Vauclain Compound)
  15 2-8-0 OSL 965-979 (Vauclain Compound)
  4 4-4-2 SPLA&SL 100-103 (CS Class A-1)
  20 2-8-0 UP 1901-1920 (Vauclain Compound)
  10 4-4-2 UP 1-10 (CS Class A-2)
  10 4-6-0 UP 1860-1869 (Vauclain Compound)
  15 4-6-2 UP 101-115 (CS Class P-1)
       
Vacated 1 2-6-0 ORR&N 16
  6 4-4-0 ORR&N 32, 33, 34, 35, 37, 38
  8 4-4-0 OSL 200, 201, 203, 206, 207, 208, 210, 214 (Vacated before 1904)
  8 4-4-0 OSL 302, 309, 311, 312, 318, 320, 305, 308 (Sold to SPLA&SL)
  10 4-4-0 UP 330, 343, 480, 566, 577, 666, 714, 715, 790, 999
  4 4-6-0 OSL 504, 506, 511, 519 (Vacated before 1904)
  7 4-6-0 OSL 507, 512, 514, 517, 518, 522, 523 (Sold to SPLA&SL)
  2 Shay OSL 59, 60 (Sold to SPLA&SL)

1904

Added 4 4-6-2 ORR&N 190-193
  5 0-6-0 OSL 588-592
  12 2-8-0 OSL 1010-1021
  8 4-4-2 OSL 850-857
  6 0-6-0 SPLA&SL 14-19 (CS Class S-1)
  9 2-8-0 SPLA&SL 500-508 (CS Class C-1)
  25 2-8-0 SPLA&SL 600-624 (CS Class C-2)
  13 4-6-2 SPLA&SL 400-412 (CS Class P-1)
  4 4-6-2 UP 116-119
       
Vacated 2 2-8-0 UP 1250, 1252
  39 4-4-0 UP 602, 612, 613, 615, 616, 632, 634, 637, 638, 643,
646, 647, 661, 671, 688, 690, 694, 702, 720, 723,
737, 740, 742, 774, 775, 776, 779, 783, 792, 793,
794, 797, 817, 831, 832, 833, 838, 840, 841

1905

In late 1905, all SPLA&SL engines numbered above 100 were renumbered by adding 3000 to the road number (100 became 3100, 200 became 3200, etc.). This was done at the request of the AT&SF following the April 26, 1905 joint trackage agreement, to avoid confusion with AT&SF's engines of the same road numbers in the district where joint operations were conducted between San Bernardino and Daggett, California. Locomotives delivered after early 1905 used the new numbering pattern.

Added 4 0-6-0 ORR&N 21-24
  36 2-8-0 ORR&N 350-355
  4 4-6-2 ORR&N 194-197
  3 2-8-0 OSL 1022-1024
  5 2-8-0 SPLA&SL 625-629
  18 4-6-2 SPLA&SL 413-420
  10 0-6-0 UP 1201-1210 (CS Class S-1)
  25 2-8-0 UP 201-225
       
Vacated 1 2-6-0 ORR&N 15
  8 2-8-0 UP 1254, 1256, 1257, 1263, 1280, 1281, 1286, 1287
  3 4-4-0 ORR&N 31, 40, 45
  6 4-4-0 UP 490, 491, 576, 579, 596, 659
  2 4-6-0 OSL 502, 510

1906

Added 3 4-6-2 ORR&N 198-200
  19 2-8-0 OSL 1025-1043
  8 0-6-0 OSL 565-572
  4 4-6-2 OSL 875-878
  8 2-8-0 SRV 356-363 (Snake River Valley)
  25 4-4-2 UP 11-35
  6 4-6-2 UP 120-125
  10 0-6-0 UP 1211-1220 (CS Class S-2)
  27 2-8-0 UP 226-252
       
Vacated 1 2-6-0 ORR&N 18
  6 2-8-0 UP 1262, 1269, 1274, 1275, 1277, 1278
  5 4-4-0 ORR&N 44, 46, 47, 53, 61
  1 4-4-0 OSL 205
  1 4-4-0 UP 667

1907

Added 3 0-6-0 ORR&N 28-30
  20 2-8-0 ORR&N 366-385
  25 2-8-0 OSL 1044-1068
  4 0-6-0 OSL 573-576
  5 0-6-0 SPLA&SL 20-24 (CS Class S-2)
  5 4-6-2 SPLA&SL 3421-3425
  35 2-8-0 SPLA&SL 3630-3664
  1 Shay SPLA&SL 61
  10 0-6-0 UP 1221-1230 (CS Class S-2)
  4 4-6-2 UP 126-129
  58 2-8-0 UP 253-310
       
Vacated 2 4-4-0 OSL 310, 313
  1 4-4-0 UP 644

1908

Added 6 2-8-0 O&W-1-6
  6 4-6-0 ORR&N 205-210
  3 2-8-0 ORR&N 386-388
  4 2-8-0 OSL 1069-1072
  7 0-6-0 OSL 558-564
  4 4-4-2 OSL 858-861
  10 2-8-0 SPLA&SL 3665-3674
  1 0-6-0 UP 1231 (CS Class S-2)
  7 2-8-0 UP 311-317
       
Vacated 7 4-4-0 UP 611, 619, 656, 676, 681, 795, 796
  2 4-6-0 OSL 505, 513

1909

Added 2 2-8-0 NCRR-1, 2
  6 4-6-0 ORR&N 211-216
  2 0-6-0 ORR&N 31, 32
  3 2-8-8-2 ORR&N 450-452
  7 4-6-0 OSL 810-816
  10 0-6-0 UP 1232-1241 (CS Class S-2)
  21 4-6-2 UP 130-150
  3 2-8-8-2 UP 2000-2002
       
Vacated 1 0-4-0T ORR&N 14 (to Albina Shop Goat  #0240)
  1 2-6-0 ORR&N 19
  1 4-4-0 ORR&N 52
  2 4-4-0 OSL 204, 209
  2 4-4-0 UP 624, 660
  4 4-4-0 UP 834, 842, 847, 844 (Sold to SPdeM)
  1 4-6-0 UP 1013

1910

Oregon-Washington Railroad & Navigation Company (OWRR&N) was organized in 1910 to purchase the ORR&N, and its leased companies, and several branch roads in Oregon and Washington.

Added 1 2-8-2 ORR&N 440
       
Vacated 1 4-4-0 ORR&N 67
  5 4-4-0 UP 573, 670, 778, 787, 788

1911

Added 15 2-8-2 OSL1100-1114
  5 4-6-0 OSL 817-821
  10 4-6-2 OSL 879-888
  3 4-4-2 OWRR&N 100-102
  10 4-6-2 OWRR&N 201-209
  6 4-6-0 OWRR&N 256-262
  10 0-6-0 OWRR&N 33-42
  40 2-8-2 OWRR&N 501-540
  12 4-4-2 OWRR&N 88-99
  10 0-6-0 UP 1242-1251 (CS Class S-2)
  10 4-6-2 UP 151-160
  30 2-8-2 UP 500-529
  10 2-8-2 UP 700-709
       
Vacated 1 4-4-0 ORR&N 54
  1 4-6-0 UP 1004
  1 4-6-0 OSL 503

1912

Added 20 2-8-2 OSL 1115-1134
  5 0-6-0 OSL 593-597
  10 4-6-2 OSL 900-909
  15 2-8-2 OWRR&N 541-555
  6 4-6-2 SPLA&SL 3430-3435
  10 4-6-2 UP 161-170
  20 2-8-2 UP 530-549
  10 2-8-2 UP 710-719
       
Vacated 3 0-6-0 UP 1110, 1155, 1166
  1 4-4-0 UP 711
  1 4-6-0 UP 987

1913

Added 15 2-8-2 OSL 1200-1214
  5 4-6-2 OSL 910-914
  6 4-6-2 OWRR&N 210-215
  6 0-6-0 OWRR&N 44-49
  10 2-8-2 OWRR&N 556-565
  3 0-6-0 SPLA&SL 25-27 (CS Class S-3)
  15 0-6-0 UP 1252-1266 (CS Class S-4)
  10 4-6-2 UP 171-180
  25 2-8-2 UP 720-744
       
Vacated 2 0-6-0 UP 1109, 1159
  3 2-8-0 UP 226, 1288, 1606
  1 4-4-0 OSL 213
  3 4-4-0 UP 664, 700, 717
  4 4-4-0 UP 888-891 (Sold to SPLA&SL)

1914

Added (63) 5 0-6-0 OSL 530-534
  5 4-6-2 OSL 915-919
  4 0-6-0 OWRR&N 50-53
  9 2-8-2 SPLA&SL 3700-3708
  1 4-6-2 UP 100
  5 0-6-0 UP 1267-1271
  19 4-6-2 UP 181-199
  15 2-8-2 UP 745-759
       
Vacated (14) 5 0-6-0 UP 1101, 1105, 1151, 1153, 1154
  3 2-8-0 UP 1601, 1604, 1605 (Vacated before 1915)
  1 4-4-0 OSL 202
  1 4-4-0 UP 786
  1 4-6-0 OSL 520
  3 4-6-0 UP 909, 920, 1010

1915

On March 1, 1915, Union Pacific put into effect a "Systemwide Numbering Plan" that would renumber almost every locomotive, freight car, passenger car, and caboose owned by the railroad and its several subsidiaries.

Next -- UP Locomotive Chronology, 1915-1933

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