Oregon Short Line (1897 to 1915)

General Notes:

1. OSL 100 is shown in the January 1, 1900 listing of OSL equipment, with 16x24-inch cylinders and a new date of August 1870
2. Based on the UP Boston account books, Pitchard says OSL 100 was built as KP 61 in 1870; to UPRy 402 in 1885; to Idaho Central Railway in 1887; to OSL&UN 402 in 1889; to OSL 100 in 1897; Pitchard cites "a U. P. Boston General Office general journal entry in August of 1887, which notes that U.P. engine No. 402 (and some other rolling stock) was sold in that month to the new Idaho Central Railway."
3. Based on the UP 1894 inventory record, McCulloh does not show an OSL 100, and that UPRy 402 was rebuilt to UPRy 827 in 1887, then to UP 941 in 1915.
4. (The question becomes: which "official" record is more believable, the Boston account book record, or the UP 1894 inventory record. There were at least four locomotives in the UPRy 400 series, all vacated in 1887, that could have been sold to Idaho Central and/or rebuilt to UPRy 827.)

General Notes:

1. OSL 101 was built as Utah Southern RR 5 in 1880; to Utah Central Railway 11 in 1881; to OSL&UN 437 (2nd) in 1889; to OSL 101 in 1897; vacated after 1897
2. OSL 1900 list shows "new" date of August 1879

General Notes:

1. OSL 102 was built as UPRR 49 in 1868; to Utah Southern RR 2 in 1873; to Utah Central Railway 8 in 1881; to OSL&UN 435 in 1889; to OSL 102 in 1897; in snowplow service as of May 19, 1902, per Salt Lake Daily Tribune
2. OSL 1900 list shows "new" date of August 1879

General Notes:

1. OSL 103 was built as Utah Southern RR 4 in 1878; to Utah Central Railway 10 in 1881; to OSL&UN 436 (2nd) in 1889; to OSL 103 in 1897
2. OSL 1900 list shows "new" date of August 1873
3. OSL 103 was scrapped by OSL in November 1901 (from OSL account books, per Pitchard research)

General Notes:

1. The specific number-to-number sequence for the OSL&UN 500 series to the OSL 200 series is not confirmed; the sequence shown above is based on available locomotive specifications and other sources.
2. The "Engine New" dates shown in the 1900 OSL inventory may be the most recent rebuild of a particular locomotive; the dates also likely reflect the date in 1867 that the subject locomotives were purchased by UPRR from its various construction contractors.
3. Individual locomotive specifications:

Notes:

1. OSL 200 was built for UPRR as "Vice Admiral Farragut" in 1865; to UPRR 5 in 1867; to UPRy 5 in 1880; to OSLRy 24 in 1882; to OSLRy 550 in 1885; to OSL&UN 550 in 1889; to OSL 200 in 1897; scrapped by OSL in December 1899 (from OSL account books, per Pitchard research)
2. OSL 201 was built for UPRR as "Major General Sheridan" in 1865; to UPRR 4 in 1867; to UPRy 4 in 1880; to OSLRy 29 in 1882; to OSLRy 551 in 1885; to OSL&UN 551 in 1889; to OSL 201 in 1897; vacated in 1898

General Notes:

1. The specific number-to-number sequence for the OSL&UN 500 series to the OSL 200 series is not confirmed; the sequence shown above is based on available locomotive specifications and other sources.
2. The 1900 inventory for OSL does not show OSL 202
3. Individual locomotive specifications:

Notes:

1. OSL 202 was built for UPRR as "Colorado" in 1866; to UPRR 11 in 1867; to UPRy 11 in 1880; to OSLRy 26 in 1882; to OSLRy 552 in 1885; to OSL&UN 552 in 1889; to OSL 202 in 1897; vacated and scrapped by OSL in October 1898

General Notes:

1. The specific number-to-number sequence for the OSL&UN 500 series to the OSL 200 series is not confirmed; the sequence shown above is based on available locomotive specifications and other sources.
2. The "Engine New" dates shown in the 1900 OSL inventory may be the most recent rebuild of a particular locomotive; the dates also likely reflect the date in 1867 that the subject locomotives were purchased by UPRR from its various construction contractors.
3. Individual locomotive specifications:

Notes:

1. OSL 203 was built as UPRR 34 in 1867; to UPRy 34 in 1880; to OSLRy 19 in 1882; to OSLRy 558 in 1885; to OSL&UN 558 in 1889; to OSL 203 in 1897; vacated in 1906
2. OSL 204 was built as UPRR 35 in 1867; to UPRy 35 in 1880; to OSLRy 20 in 1882; to OSLRy 559 in 1885; to OSL&UN 559 in 1889; to OSL 204 in 1897; vacated in 1909; sold to Inland Crystal Salt Company (Salt Lake City, Utah) in 1909
3. OSL 205 was built as UPRR 33 in 1867; to UPRy 33 in 1880; to OSLRy 25 in 1882; to OSLRy 560 in 1885; to OSL&UN 560 in 1889; to OSL 205 in 1897; vacated in August 1902 (from OSL account books, per Pitchard research)

General Notes:

1. The specific number-to-number sequence for the OSL&UN 500 series to the OSL 200 series is not confirmed; the sequence shown above is based on available locomotive specifications and other sources.
2. The "Engine New" dates shown in the 1900 OSL inventory may be the most recent rebuild of a particular locomotive; the dates also likely reflect the date in 1867 that the subject locomotives were purchased by UPRR from its various construction contractors.
3. Builder information taken from Robert Lehmuth's Grant list.
4. Individual locomotive specifications:

Notes:

1. OSL 206 was built as UPRR 19 (2nd) in 1866; to OSLRy 1 in 1882; to OSLRy 586 in 1885; to OSL&UN 586 in 1889; to OSL 206 in 1897; scrapped by OSL in November 1900 (from OSL account books, per Pitchard research)
2. OSL 207 was built as UPRR 20 (2nd) in 1866; to OSLRy 2 in 1882; to OSLRy 587 in 1885; to OSL&UN 587 in 1889; to OSL 207 in 1897; vacated in 1916; scrapped
3. OSL 208 was built as UPRR 16 in 1866; to OSLRy 3 in 1882; to OSLRy 588 in 1885; to OSL&UN 588 in 1889; to OSL 208 in 1897; vacated in 1900; scrapped by OSL at Salt Lake City in mid June 1900 (see Salt Lake Tribune, June 14, 1900)
4. OSL 209 was built as UPRR 43 in 1867; to OSLRy 4 in 1882; to OSLRy 589 in 1885; to OSL&UN 589 in 1889; to OSL 209 in 1897; vacated between 1900 and 1904
5. OSL 210 was built as UPRR 44 in 1867; to OSLRy 5 in 1882; to OSLRy 590 in 1885; to OSL&UN 590 in 1889; to OSL 210 in 1897; scrapped by OSL in July 1900 (from OSL account books, per Pitchard research)
6. OSL 211 was built as UPRR 45 in 1867; to OSLRy 6 in 1882; to OSLRy 591 in 1885; to OSL&UN 591 in 1889; to OSL 211 in 1897; scrapped by OSL in March 1902 (from OSL account books, per Pitchard research)
7. OSL 212 was built as UPRR 47 in 1867; to OSLRy 9 in 1882; to OSLRy 592 in 1885; to OSL&UN 592 in 1889; to OSL 212 in 1897; vacated in September 1902 (from OSL account books, per Pitchard research)
8. OSL 213 was built as UPRR 18 in 1866; to OSLRy 10 in 1882; to OSLRy 593 in 1885; to OSL&UN 593 in 1889; to OSL 213 in 1897; converted to wedge snow plow at Pocatello, March 1912; vacated in 1913
9. OSL 214 was built as UPRR 58 in 1868; to OSLRy 23 in 1882; to OSLRy 594 in 1885; to OSL&UN 594 in 1889; to OSL 214 in 1897; to OSL 1000 in 1915; vacated in 1916

General Notes:

1. Payette Valley RR was completed in 1906 and leased to OSL in 1914.

Notes:

1. OSL 215 was built for an unknown original owner; sold to Payette Valley Railroad in 1906; PVRR 101 became OSL 215 in 1914; to OSL 1001 in 1915; vacated in 1916

General Notes:

1. Individual locomotive specifications:

Notes:

1. OSL 300 was built as U&N 726 in 1887; to OSL&UN 726 in 1889; to OSL 300 in 1897; rebuilt to OSL 401 in 1899; to OSL 1010 in 1915; vacated in 1921
2. OSL 301 was built as U&N 727 in 1887; to OSL&UN 727 in 1889; to OSL 301 in 1897; sold to Silver Peak Railroad in November 1909 in exchange for OSL 642 (Silver Peak RR operated from a connection with Tonopah & Goldfield RR in Nevada, and was abandoned by December 1918; locomotives scrapped by 1922.) (see Robertson, Volume 1, page 160)
3. OSL 302 was built as U&N 728 in 1887; to OSL&UN 728 in 1889; to OSL 302 in 1897; to SPLA&SL 28 in 1903; to LA&SL 1051 in 1916; vacated in 1925
4. OSL 303 was built as U&N 729 in 1887; to OSL&UN 729 in 1889; to OSL 303 in 1897; to OSL 1002 in 1915; vacated in 1917
5. OSL 304 was built as U&N 730 in 1887; to OSL&UN 730 in 1889; to OSL 304 in 1897; sold to Boise, Nampa & Owyhee Railroad in October 1901 for $5,600.00; to Idaho Northern Railway 201 in 1907 (INRy sold to OSL in December 1912); INRy 201 back to OSL 304 in January 1913; to OSL 1003 in 1915; vacated in 1922 (Read more about BN&O and INRy)
6. OSL 305 was built as U&N 731 in 1887; to OSL&UN 731 in 1889; to OSL 305 in 1897; to SPLA&SL 34 in 1903; to LAS&SL 1054 in 1916; vacated in 1922
7. OSL 306 was built as U&N 732 in 1887; to OSL&UN 732 in 1889; to OSL 306 in 1897; rebuilt to OSL 403 in 1899; to OSL 1012 in 1915; vacated in 1921
8. OSL 307 was built as U&N 733 in 1887; to OSL&UN 733 in 1889; to OSL 307 in 1897; rebuilt to OSL 402 in 1899; to OSL 1011 in 1915; vacated in 1922
9. OSL 308 was built as U&N 734 in 1887; to OSL&UN 734 in 1889; to OSL 308 in 1897; to SPLA&SL 35 in 1903; to LA&SL 1055 in 1916; vacated in 1922
10. OSL 309 was built as U&N 735 in 1887; to OSL&UN 735 in 1889; to OSL 309 in 1897; to SPLA&SL 29 in 1903; vacated in 1922
11. OSL 310 was built as OSLRy 746 in 1887; to OSL&UN 746 in 1889; to OSL 310 in 1897; to SPdeM 150 in 1907
12. OSL 311 was built as OSLRy 747 in 1887; to OSL&UN 747 in 1889; to OSL 311 in 1897; to SPLA&SL 30 in 1903; vacated in 1916
13. OSL 312 was built as OSLRy 748 in 1887; to OSL&UN 748 in 1889; to OSL 312 (2nd) in 1897; to SPLA&SL 31 in 1903; vacated in 1917
14. OSL 313 was built as OSLRy 749 in 1887; to OSL&UN 749 in 1889; to OSL 313 in 1897; to SPdeM 151 in 1907
15. OSL 314 was built as OSLRy 750 in 1887; to OSL&UN 750 in 1889; to OSL 314 in 1897; rebuilt to OSL 404 in 1899; vacated in 1902

General Notes:

1. Individual locomotive specifications:

Notes:

1. OSL 315 was built as U&N 751 in 1887; to OSL&UN 751 in 1889; to OSL 315 in 1897; to OSL 1004 in 1915; vacated in 1923
2. OSL 316 was built as U&N 752 in 1887; to OSL&UN 752 in 1889; to OSL 316 in 1897; to OSL 450 in 1901; to OSL 1014 in 1915; vacated in 1923
3. OSL 317 was built as U&N 753 in 1887; to OSL&UN 753 in 1889; to OSL 317 in 1897; to OSL 1005 in 1915; vacated in 1921
4. OSL 318 was built as U&N 754 in 1887; to OSL&UN 754 in 1889; to OSL 318 in 1897; to SPLA&SL 32 in 1903; to LA&SL 1052 in 1916; vacated in 1925
5. OSL 319 was built as U&N 755 in 1887; to OSL&UN 755 in 1889; to OSL 319 in 1897; to OSL 1006 in 1915; vacated in 1923
6. OSL 320 was built as U&N 756 in 1887; to OSL&UN 756 in 1889; to OSL 320 in 1897; to SPLA&SL 33 in 1903; to LA&SL 1053 in 1916; vacated in 1922
7. OSL 321 was built as U&N 757 in 1887; to OSL&UN 757 in 1889; to OSL 321 in 1897; to SPdeM 152 in 1907
8. OSL 322 was built as U&N 758 in 1887; to OSL&UN 758 in 1889; to OSL 322 in 1897; to SPdeM 153 in 1907
9. OSL 323 was built as U&N 759 in 1887; to OSL&UN 759 in 1889; to OSL 323 in 1897; to OSL 1007 in 1915; vacated in 1921
10. OSL 324 was built as U&N 760 in 1887; to OSL&UN 760 in 1889; to OSL 324 in 1897; rebuilt to OSL 400 in 1901; to OSL 1009 in 1915; vacated in 1922

General Notes:

1. Idaho Northern Railway was sold to OSL on December 31, 1912; merged with OSL on January 6, 1913.

Notes:

1. OSL 325 was built as Idaho Northern Railway 200 in 1909; to OSL 325 in 1913; to OSL 1008 in 1915; vacated in 1923

General Notes:

1. Individual locomotive specifications

Notes:

1. OSL 367 was built as UPRR 144 in 1869; to Utah Southern RR 3 in 1873; to Utah Central Railway 9 in 1881; to OSL&UN 367 in 1889; vacated between 1894 and 1898
2. OSL 368 was built as UPRR 65 in 1868; to Utah Southern Railroad (13) in 1879; to Utah Central Railway 15 in 1881; to OSL&UN 368 in 1889; vacated between 1894 and 1898.

Notes:

1. OSL 400 was built as U&N 760 in 1887; to OSL&UN 760 in 1889; to OSL 324 in 1897; rebuilt to OSL 400 in 1901; to OSL 1009 in 1915; vacated in 1922

General Notes:

1. Individual locomotive specifications:

Notes:

1. OSL 401 was built as U&N 726 in 1887; to OSL&UN 726 in 1889; to OSL 300 in 1897; rebuilt to OSL 401 in 1899; to OSL 1010 in 1915; vacated in 1921
2. OSL 402 was built as U&N 733 in 1887; to OSL&UN 733 in 1889; to OSL 307 in 1897; rebuilt to OSL 402 in 1899; to OSL 1011 in 1915; vacated in 1922
3. OSL 403 was built as U&N 732 in 1887; to OSL&UN 732 in 1889; to OSL 306 in 1897; rebuilt to OSL 403 in 1899; to OSL 1012 in 1915; vacated in 1921
4. OSL 404 was built as OSLRy 750 in 1887; to OSL&UN 746 in 1889; to OSL 310 in 1897; rebuilt to OSL 404 in 1899; vacated in 1902

General Notes:

1. Individual locomotive history:

Notes:

1. OSL 405 was built as UPRR 123 in 1868; to Utah Southern Railroad Extension 123 in 1879; to Utah Central Ry. 16 in 1881; to OSL&UN 369 in 1889; rebuilt to UPRy 843 in December 1892; to OSL 405 in 1899; to OSL 1013 in 1915; vacated in January 1923; possibly leased or sold to Willamina & Grande Ronde Railway

General Notes:

1. Built as OSL 400-405 (2nd) and 406-409; renumbered to OSL 800-802 (2nd) and 803-809 upon delivery in 1902; to OSL 1562-1571 in 1915; vacated in 1926-1928
2. Built as Vauclain compound locomotives; rebuilt to simple in 1906-1909
3. OSL no. 409 was the first locomotive on the Union Pacific Lines to be delivered with a Vanderbilt-patent tender. The other locomotives in this group were delivered with a 7,000 gallon Rectangular tender, Class 7-R; the tender on OSL 409 was a 7,000 gallon Cylindrical tender, class 7-C.

Notes:

1. OSL 434 was built as Utah Central RR 6 in 1872; to Utah Central Railway 6 in 1881; to OSL&UN 434 in 1889; to OSL 434 in 1897; vacated after 1897 (not shown in OSL 1900 list)

Notes:

1. OSL 450 was built as U&N 752 in 1887; to OSL&UN 752 in 1889; to OSL 316 (2nd) in 1897; rebuilt to OSL 450 in 1901; to OSL 1014 in 1915; vacated in 1923

General Notes:

1. The OSL 500-525 series were a group of ex OSL&UN 900- and 1000-class locomotives rebuilt before 1894 with 57 inch drivers; due to their similarity, all were renumbered to the 500 series when OSL took possession of OSL&UN in 1897.
2. The "Engine New" dates shown in the 1900 OSL inventory may be the most recent rebuild of a particular locomotive, with OSL 523, 524 and 525 being the obvious cases
3. Individual locomotive specifications:

Notes:

1. OSL 500 was built as UPRR 140 (2nd) in 1874; to UPRy 140 in 1880; to OSLRy 14 in 1882; to OSLRy 969 in 1885; to OSL&UN 969 in 1889; to OSL 500 in 1897; work began in 1898 to recondition OSL 500 for service as Utah & Pacific RR number 2, work not accepted by U&P (may have become U&P 4; U&P sold to OSL in April 1901); scrapped by OSL in September 1901, possibly after being wrecked. (from OSL account books, per Pitchard research)
2. OSL 501 was built as UPRR 139 (2nd) in 1874; to UPRy 139 in 1880; to OSLRy 15 in 1882; to OSLRy 970 in 1885; to OSL&UN 970 in 1889; to OSL 501 in 1897; scrapped by OSL in September 1901 (from OSL account books, per Pitchard research)
3. OSL 502 was built as UPRy 54 (2nd) in 1882; to Salt Lake & Western Railway 1 in 1882; to SL&W 984 in 1885; to OSL&UN 984 in 1889; to OSL 502 in 1897; vacated in 1905
4. OSL 503 was built as UPRy 235 in 1881; to OSLRy 11 in 1882; to OSLRy 966 in 1885; to OSL&UN 966 in 1889; to OSL 503 in 1897; sold to U. S. Reclamation Service number 2 at Boise, Idaho in 1911
5. OSL 504 was built as UPRR 134 (2nd) in 1874; to UPRy 134 in 1880; to OSLRy 16 in 1883; to OSLRy 971 in 1885; to OSL&UN 971 in 1889; to OSL 504 in 1897; vacated in 1899; sold to Pacific & Idaho Northern Railway 101 in August 1899
6. OSL 505 was built as UPRy 123 in 1882; to OSLRy 13 in 1882; to OSLRy 968 in 1885; to OSL&UN 968 in 1889; to OSL 505 in 1897; to Utah & Pacific number 2 in 1898; U&P sold to OSL in April 1901; to OSL 505 in 1901; wrecked and scrapped in 1908 (possibly renumbered to OSL 1008 in 1901)
7. OSL 506 was built as UPRy 55 (2nd) in 1882; to OSLRy 7 in 1882; to OSLRy 964 in 1885; to OSL&UN 964 in 1889; to OSL 506 in 1897; vacated between 1900 and 1905
8. OSL 507 was built as UPRy 49 in 1882; to OSLRy 12 in 1882; to OSLRy 967 in 1885; to OSL&UN 967 in 1889; to OSL 507 in 1897; to Utah & Pacific number 1 in September 1898; U&P sold to OSL in April 1901; to OSL 507 in 1901; to SPLA&SL 52 in 1903; vacated before 1914 (U&P information from Salt Lake Daily Tribune, September 29, 1898) (possibly renumbered to OSL 1007 in 1901)
9. OSL 508 was built as UPRy 199 in 1880; to OSLRy 28 in 1883; to OSLRy 977 in 1885; to OSL&UN 977 in 1889; to OSL 508 in 1897; vacated in 1900; out of service at Salt Lake City in mid June 1900 (see Salt Lake Tribune, June 14, 1900); scrapped by OSL in March 1902 (from OSL account books, per Pitchard research)
10. OSL 509 was built as UPRy 234 in 1881; to OSLRy 17 in 1883; to OSL&UN 972 in 1889; to OSL 509 in 1897; scrapped by OSL in October 1901 (from OSL account books, per Pitchard research)
11. OSL 510 was built as UPRy 246 (1st) in 1881; to OSLRy 18 in 1883; to OSLRy 973 in 1885; to OSL&UN 973 in 1889; to OSL 510 in 1897; vacated in 1901
12. OSL 511 was built as UPRR 184 in 1879; to UPRy 184 in 1880; to OSLRy 22 in 1883; to OSLRy 975 in 1885; to OSL&UN 975 in 1889; to OSL 511 in 1897; vacated in 1916; scrapped
13. OSL 512 was built as UPRR 133 (2nd) in 1874; to UPRy 133 in 1880; to OSLRy 21 in 1883; to OSLRy 974 in 1885; to OSL&UN 974 in 1889; to OSL 512 in 1897; to Utah & Pacific number 3 in December 1898; U&P sold to OSL in April 1901; to OSL 512 in 1901; to SPLA&SL 53 in 1903; to LA&SL 53 in 1916; scrapped in November 1918 (U&P information from from OSL account books, per Pitchard research) (possibly renumbered to OSL 1009 in 1901)
14. OSL 513 was built as Utah Southern RR 6 in 1881; to Utah Central Railway 12 in 1881; to OSL&UN 1027 in 1889; to OSL 513 in 1897; vacated in 1908
15. OSL 514 was built as Utah Southern RR 7 in 1881; to UCRy 13 in 1881; to OSL&UN 1028 in 1889; rebuilt to OSL 514 in 1897; to SPLA&SL 54 in 1903; vacated in 1914
16. OSL 515 was ordered as UPRy 54 (1st), changed to Utah Central Railway 19 upon delivery in 1882; to OSL&UN 1029 in 1889; to OSL 515 in 1897; sold to Boise, Nampa & Owyhee Railway in August 1899 for $4,000.00; to Idaho Northern Railway in 1907; vacated before 1909 (BN&O sale information from OSL account books, per Pitchard research)
17. OSL 516 was ordered as UPRy 55 (1st), changed to Utah Central Railway 20 upon delivery in 1882; to OSL&UN 1030 in 1889; to OSL 516 in 1897; scrapped by OSL in December 1900 (from OSL account books, per Pitchard research)
18. OSL 517 was built as UPRy 65 in 1882; to Utah Central Railway 22 in 1883; to OSL&UN 1031 in 1889; to OSL 517 in 1897; to SPLA&SL 55 in 1903; vacated before 1914
19. OSL 518 was built as UPRy 51 in 1882; to OSLRy 8 in 1882; to OSLRy 965 in 1885; to OSL&UN 965 in 1889; to OSL 518 in 1897; to SPLA&SL 56 in 1903; sold to Bakersfield & Ventura Railway number 1 (Oxnard, California) on June 9, 1905; scrapped in 1906
20. OSL 519 was built as OSLRy 31 in 1883; to OSLRy 979 in 1885; to OSL&UN 979 in 1889; to OSL 519 in 1897; sold to Pacific & Idaho Northern Railway in October 1900 for $4,000.00. (from OSL account books, per Pitchard research) (Robertson, Volume 2, page 226, says OSL 504 to P&IN 101 on August 3, 1899; does not show any reference to ex OSL 519; P&IN operations began on December 30, 1899, which infers that OSL 504 was used by P&IN for construction in August 1899, with OSL 519 being sold to P&IN at the later 1900 date)
21. OSL 520 was built as OSLRy 32 in 1883; to OSLRy 980 in 1885; to OSL&UN 980 in 1889; to OSL 520 in 1897; sold to U. S. Reclamation Service number 3 at Boise, Idaho in 1914
22. OSL 521 was built as OSLRy 33 in 1883; to OSLRy 981 in 1885; to OSL&UN 981 in 1889; to OSL 521 in 1897; vacated in 1916
23. OSL 522 was built as OSLRy 34 in 1883; to OSLRy 982 in 1885; to OSL&UN 982 in 1889; to OSL 522 in 1897; to SPLA&SL 57 in 1903; to LA&SL 57 in 1916; assigned LA&SL 1590, but not renumbered; vacated 1922.
24. OSL 523 was built as UPRR 107 in 1868; to UPRy 107 in 1880; to UPRy 907 in 1885; transferred to OSL&UN ownership as OSL&UN 907 before 1894; rebuilt in February 1894 with 57 inch drivers; to OSL 523 in 1897; to SPLA&SL 58 in 1903; wrecked in April 1906 and scrapped
25. OSL 524 was built as OSLRy 35 in 1883; to OSLRy 983 in 1885; to OSL&UN 983 in 1889; to OSL 524 in 1897; to UP 1500 in 1915; vacated in 1922
26. OSL 525 was built as OSLRy 30 in 1883; to OSLRy 978 in 1885; to OSL&UN 978 in 1889; to OSL 525 in 1897; to OSL 1501 in 1915; vacated in 1921 (OSL 1900 list shows "new" date of March 1898)

General Notes:

1. Idaho Northern Railway was sold to OSL on December 31, 1912; merged with OSL on January 6, 1913 (Read more about Idaho Northern Ry)

Notes:

1. OSL 526 was built as Idaho Northern Railway 101 in 1907; to OSL 526 in 1913; to OSL 1502 in 1915 (leased to Saratoga & Encampment 1917-1919); vacated in 1925

General Notes:

1. Montana Union Railway 107 and 108 sold to OSL in October 1897 (Read more about the Montana Union Railway)

Notes:

1. OSL 550 was built as Montana Union Railway 107 in 1889; to OSL 550 in 1897; to OSL 4700 in 1915; rebuilt to 0-6-0T 010998 in October 1924, used by LA&SL at Las Vegas, then by OSL at Pocatello; scrapped in March 1947
2. OSL 551 was built as Montana Union Railway 108 in 1889; to OSL 551 in 1897; rebuilt in 1914 to OSL Roadway Equipment 0-6-0T 2044; renumbered in 1922 to OSL shop switcher 02089, assigned to Pocatello, Idaho; scrapped in April 1940.

Notes:

1. OSL 552 was built as OSL 560 (1st) in 1901; to OSL 552 in 1908; to OSL 4701 in 1915; vacated in 1926
2. OSL 553 was built as OSL 561 (1st) in 1901; to OSL 553 in 1908; to OSL 4702 in 1915; vacated in 1926

Notes:

1. Built as OSL 560 (1st) in 1901; to OSL 552 in 1908; to OSL 4701 in 1915; vacated in 1926
2. Built as OSL 561 (1st) in 1901; to OSL 553 in 1908; to OSL 4702 in 1915; vacated in 1926

General Notes:

1. For the four locomotives rebuilt in 1900-1901 and renumbered to the OSL 650 series, the number-to-number sequence is not confirmed.
2. Individual locomotive specifications:

Notes:

1. OSL 600 was built as OSL&UN 1416 in 1890; to OSL 600 in 1897; rebuilt to OSL 651 in 1901; to OSL 1531 in 1915; vacated in 1927
2. OSL 601 was built as OSL&UN 1417 in 1890; to OSL 601 in 1897; rebuilt to OSL 652 in 1900; to OSL 1532 in 1915; vacated in 1928
3. OSL 602 was built as OSL&UN 1418 in 1890; to OSL 602 in 1897; to OSL 1503 in 1915; vacated in 1926
4. OSL 603 was built as OSL&UN 1419 in 1890; to OSL 603 in 1897; to OSL 1504 in 1915; vacated in 1928
5. OSL 604 was built as OSL&UN 1420 in 1890; to OSL 604 in 1897; rebuilt to OSL 653 in 1900; to OSL 1533 in 1915; vacated in 1928
6. OSL 605 was built as OSL&UN 1421 in 1890; to OSL 605 in 1897; to OSL 1505 in 1915; vacated in 1925
7. OSL 606 was built as OSL&UN 1422 in 1890; to OSL 606 in 1897; to OSL 1506 in 1915; vacated in 1928
8. OSL 607 was built as OSL&UN 1423 in 1890; to OSL 607 in 1897; rebuilt to OSL 654 in 1900; to OSL 1534 in 1915; vacated in 1928
9. OSL 608 was built as OSL&UN 1424 in 1890; to OSL 608 in 1897; to OSL 1507 in 1915; vacated in 1926
10. OSL 609 was built as OSL&UN 1425 in 1890; to OSL 609 in 1897; to OSL 680 in 1902; to OSL 1540 in 1915; vacated in 1923
11. OSL 610 was built as OSL&UN 1426 in 1890; to OSL 610 in 1897; to OSL 682 in 1902; to OSL 1542 in 1915; vacated in 1924

General Notes:

1. OSL 611-616 were built as OSL&UN 1459-1464 in 1891 with Belpaire fireboxes

Notes:

1. OSL 611 was built as OSL&UN 1459 in 1891; to OSL 611 in 1897; to OSL 1508 in 1915; vacated in 1928
2. OSL 612 was built as OSL&UN 1460 in 1891; to OSL 612 in 1897; to OSL 1509 in 1915; vacated in 1925
3. OSL 613 was built as OSL&UN 1461 in 1891; to OSL 613 in 1897; to OSL 1510 in 1915; vacated in 1925
4. OSL 614 was built as OSL&UN 1462 in 1891; to OSL 614 in 1897; to OSL 1511 in 1915; vacated in 1926
5. OSL 615 was built as OSL&UN 1463 in 1891; to OSL 615 in 1897; to OSL 1512 in 1915; vacated in 1925
6. OSL 616 was built as OSL&UN 1464 in 1891; to OSL 616 in 1897; to OSL 1513 in 1915; vacated in 1923; sold in June 1923 to Columbia Steel Corporation for service on the Carbon County Railway in Utah

General Notes:

1. For locomotives rebuilt in 1900-1902 and renumbered to the OSL 650 and 680 series, the number-to-number sequence is not confirmed.
2. Individual locomotive specifications:

Notes:

1. OSL 617 was built as OSL&UN 1427 in 1890; to OSL 617 in 1897; rebuilt to OSL 683 in 1903; to OSL 1543 in 1915; vacated in 1923
2. OSL 618 was built as OSL&UN 1428 in 1890; to OSL 618 in 1897; rebuilt to OSL 659 in 1901; to OSL 1539 in 1915; vacated in 1924

General Notes:

1. For locomotives rebuilt in 1900-1902 and renumbered to the OSL 650 and 680 series, the number-to-number sequence is not confirmed.
2. Individual locomotive specifications:

Notes:

1. OSL 619 was built as OSL&UN 1441 in 1890; to OSL 619 in 1897; to OSL 1514 in 1915; vacated in 1923
2. OSL 620 was built as OSL&UN 1442 in 1890; to OSL 620 in 1897; rebuilt to OSL 655 in 1901; to OSL 1535 in 1915; vacated in 1927
3. OSL 621 was built as OSL&UN 1443 in 1890; to OSL 621 in 1897; to OSL 1515 in 1915; vacated in 1926
4. OSL 622 was built as OSL&UN 1444 in 1890; to OSL 622 in 1897; rebuilt to OSL 656 in 1901; to OSL 1536 in 1915; vacated in 1925
5. OSL 623 was built as OSL&UN 1445 in 1890; to OSL 623 in 1897; to OSL 1516 in 1915; vacated in 1922
6. OSL 624 was built as OSL&UN 1446 in 1890; to OSL 624 in 1897; to OSL 1517 in 1915; vacated in 1927
7. OSL 625 was built as OSL&UN 1447 in 1890; to OSL 625 in 1897; to OSL 1518 in 1915; vacated in 1924
8. OSL 626 was built as OSL&UN 1448 in 1891; to OSL 626 in 1897; rebuilt to OSL 658 in 1901; to OSL 1538 in 1915; vacated in 1928
9. OSL 627 was built as OSL&UN 1449 in 1890; to OSL 627 in 1897; to OSL 1519 in 1915; vacated in 1924
10. OSL 628 was built as OSL&UN 1450 in 1891; to OSL 628 in 1897; rebuilt to OSL 670 (Richmond Compound, 57-22&34x26) in 1901; rebuilt to OSL 684 (simple, 57-19x26) in 1907; to OSL 1544 in 1915; vacated in 1928
11. OSL 629 was built as OSL&UN 1451 in 1890; to OSL 629 in 1897; to OSL 1520 in 1915; vacated in 1924
12. OSL 630 was built as OSL&UN 1452 in 1890; to OSL 630 in 1897; to OSL 1521 in 1915; vacated in 1922
13. OSL 631 was built as OSL&UN 1453 in 1890; to OSL 631 in 1897; to OSL 1522 in 1915; vacated in 1926
14. OSL 632 was built as OSL&UN 1454 in 1890; to OSL 632 in 1897; to OSL 1523 in 1915; vacated in 1925
15. OSL 633 was built as OSL&UN 1455 in 1890; to OSL 633 in 1897; to OSL 1524 in 1915; vacated in 1925
16. OSL 634 was built as OSL&UN 1456 in 1891; to OSL 634 in 1897; rebuilt to OSL 681 in 1902; to OSL 1541 in 1915; vacated in 1923
17. OSL 635 was built as OSL&UN 1457 in 1890; to OSL 635 in 1897; to OSL 1525 in 1915; vacated in 1924
18. OSL 636 was built as OSL&UN 1458 in 1890; to OSL 636 in 1897; to OSL 1526 in 1915; vacated in 1924

General Notes:

1. For the two locomotives rebuilt in 1900-1901 and renumbered to the OSL 650 series, the number-to-number sequence is not confirmed.
2. Individual locomotive specifications:

Notes:

1. OSL 637 was built as OSL&UN 1465 in 1890; to OSL 637 in 1897; rebuilt to OSL 671 (Vauclain Compound, 57-14/24x26) in 1901; rebuilt to OSL 685 (simple) in 1907; to OSL 1545 in 1915; vacated in 1926
2. OSL 638 was built as OSL&UN 1466 in 1890; to OSL 638 in 1897; to OSL 1527 in 1915; vacated in 1927
3. OSL 639 was built as OSL&UN 1467 in 1890; to OSL 639 in n1897; rebuilt to OSL 657 in 1901; to OSL 1537 in 1915; vacated in 1928
4. OSL 640 was built as OSL&UN 1468 in 1890; to OSL 640 in 1897; rebuilt to OSL 650 in 1900; to OSL 1530 in 1915; vacated in 1936
5. OSL 641 was built as OSL&UN 1469 in 1890; to OSL 641 in 1897; to OSL 1528 in 1915; vacated in 1925
6. OSL 642 was built as OSL&UN 1470 in 1890; to OSL 642 in 1897; sold to Silver Peak Railroad in June 1906; returned to OSL in in November 1909 in exchange for OSL 301; to OSL 1529 in 1915; vacated in 1924

General Notes:

1. OSL 643-645 are shown in the 1900 inventory of OSL locomotives; no other reference

General Notes:

1. The number-to-number sequence from 600 series to 650 series is not confirmed.
2. Individual locomotive specifications:

Notes:

1. OSL 650 was built as OSL&UN 1468 in 1890; to OSL 640 in 1897; rebuilt to OSL 650 in 1900; to OSL 1530 in 1915; vacated in 1936

General Notes:

1. The number-to-number sequence from 600 series to 650 series is not confirmed.
2. Individual locomotive specifications:

Notes:

1. OSL 651 was built as OSL&UN 1416 in 1890; to OSL 600 in 1897; rebuilt to OSL 651 in 1901; to OSL 1531 in 1915; vacated in 1927 (OSL 651 was rebuilt at Pocatello; new drivers cast by OSL in Salt Lake City during June 1900, see Salt Lake Tribune, June 14, 1900)
2. OSL 652 was built as OSL&UN 1417 in 1890; to OSL 601 in 1897; rebuilt to OSL 652 in 1900; to OSL 1532 in 1915; vacated in 1928
3. OSL 653 was built as OSL&UN 1420 in 1890; to OSL 604 in 1897; rebuilt to OSL 653 in 1900; to OSL 1533 in 1915; vacated in 1928
4. OSL 654 was built as OSL&UN 1423 in 1890; to OSL 607 in 1897; rebuilt to OSL 654 in 1900; to OSL 1534 in 1915; vacated in 1928
5. OSL 655 was built as OSL&UN 1442 in 1890; to OSL 620 in 1897; rebuilt to OSL 655 in 1901; to OSL 1535 in 1915; vacated in 1927
6. OSL 656 was built as OSL&UN 1444 in 1890; to OSL 622 in 1897; rebuilt to OSL 656 in 1901; to OSL 1536 in 1915; vacated in 1925

General Notes:

1. The number-to-number sequence from 600 series to 650 series is not confirmed.
2. Individual locomotive specifications:

Notes:

1. OSL 657 was built as OSL&UN 1467 in 1890; to OSL 639 in 1897; rebuilt to OSL 657 in 1901; to OSL 1537 in 1915; vacated in 1928

General Notes:

1. The number-to-number sequence from 600 series to 650 series is not confirmed.
2. Individual locomotive specifications:

Notes:

1. OSL 658 was built as OSL&UN 1448 in 1891; to OSL 626 in 1897; rebuilt to OSL 658 in 1901; to OSL 1538 in 1915; vacated in 1928
2. OSL 659 was built as OSL&UN 1428 in 1890; to OSL 618 in 1897; rebuilt to OSL 659 in 1901; to OSL 1539 in 1915; vacated in 1924

General Notes:

1. Individual locomotive specifications:

Notes:

1. OSL 670 was built as OSL&UN 1450 in 1891; to OSL 628 in 1897; rebuilt to OSL 670 (Richmond compound, 57-22&34x26) in 1901; rebuilt to OSL 684 (simple) in 1907; to OSL 1544 in 1915; vacated in 1928
2. OSL 671 was built as OSL&UN 1465 in 1891; to OSL 637 in 1897; rebuilt to OSL 671 (Vauclain compound, 57-14&24x26) in 1901; rebuilt to OSL 685 (simple) in 1907; to OSL 1545 in 1915; vacated in 1926

Notes:

1. OSL 680 was built as OSL&UN 1425 in 1890; to OSL 609 in 1897; to OSL 680 in 1902; to OSL 1540 in 1915; vacated in 1923
2. OSL 681 was built as OSL&UN 1456 in 1891; to OSL 634 in 1897; rebuilt to OSL 681 in 1902; to OSL 1541 in 1915; vacated in 1923
3. OSL 682 was built as OSL&UN 1426 in 1890; to OSL 610 in 1897; to OSL 682 in 1902; to OSL 1542 in 1915; vacated in 1924

Notes:

1. OSL 683 was built as OSL&UN 1427 in 1890; to OSL 617 in 1897; rebuilt to OSL 683 in 1902-1903; to OSL 1543 in 1915; vacated in 1926

Notes:

1. OSL 684 was built as OSL&UN 1450 in 1891; to OSL 628 in 1897; rebuilt to OSL 670 (Richmond compound, 57-22&34x26) in 1901; rebuilt to OSL 684 (simple) in 1907; to OSL 1544 in 1915; vacated in 1928

Notes:

1. OSL 685 was built as OSL&UN 1465 in 1891; to OSL 637 in 1897; rebuilt to OSL 671 (Vauclain compound, 57-14&24x26) in 1901; rebuilt to OSL 685 (simple) in 1907; to OSL 1545 in 1915; vacated in 1923