Oregon Short Line (1897 to 1915)

(Return to OSL Steam Locomotive Roster Index)

Part 1, Numbers 100 to 685

OSL 4-4-0 — 1 locomotive

1897 OSL Number	First Number	Second Number	Third Number	Third Number	Builder	Builder Number	Date Built	Date Vacated
OSL 100	KP 61	UPRy 402	ICRy 1	OSL&UN 402	Baldwin	2192	Jul 1870

Description:

Drive Wheel Diameter: 61 inches (later 69 inches)

Cylinders: 16x24 inches (later 18x26 inches)

General Notes:

a.	OSL 100 is shown in the January 1, 1900 listing of OSL equipment, with 16x24-inch cylinders and a new date of August 1870
b.	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."
c.	McCulloh does not show an OSL 100, and that UPRy 402 was rebuilt to UPRy 827 in 1887, then to UP 941 in 1915 (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)

OSL 4-4-0 — 1 locomotive

1897 OSL Number	First Number	Second Number	Third Number	Builder	Builder Number	Date Built	Date Vacated	Notes
OSL 101	USRR 5	UCRy 11	OSL&UN 437 (2nd)	Schenectady	1215	Feb 1880	Aft 1897	1

Description:

Drive Wheel Diameter: 60 inches (later 63 inches)

Cylinders: 16x24 inches

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

OSL 4-4-0 — 1 locomotive

1897 OSL Number	First Number	Second Number	Third Number	Fourth Number	Builder	Builder Number	Date Built	Date Vacated	Notes
OSL 102	UPRR 49	USRR 2	UCRy 8	OSL&UN 435	Grant	548	1868	Aft 1902	1

Description:

Drive Wheel Diameter: 61 inches (later 63 inches)

Cylinders: 17x24 inches (later 16x24 inches)

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

OSL 4-4-0 — 1 locomotive

1897 OSL Number	First Number	Second Number	Third Number	Builder	Builder Number	Date Built	Date Vacated	Notes
OSL 103	USRR 4	UCRy 10	OSL&UN 436 (2nd)	Schenectady	1093	Aug 1878	Aug 1901	1

Description:

Drive Wheel Diameter: 60 inches (later 63 inches)

Cylinders: 16x24 inches

General Notes:

a.	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
b.	OSL 1900 list shows "new" date of August 1873

Notes:

1.	OSL 103 was scapped by OSL in November 1901 (from OSL account books, per Pitchard research)

OSL 4-4-0 — 2 locomotives

1897 OSL Number	First Number	Second Number	Third Number	Fourth Number	Fifth Number	Builder	Builder Number	Date Built	Jan 1900 OSL "Engine New" Date	Date Vacated	Notes
OSL 200	UPRR 5	UPRy 5	OSLRy 24	OSLRy 550	OSL&UN 550	Norris	[1188]	1865	Sep 1878	Dec 1899	1
OSL 201	UPRR 4	UPRy 4	OSLRy 29	OSLRy 551	OSL&UN 551	Norris	[1187]	1865		Oct 1898	2

General Notes:

a.	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.
b.	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.
c.	Individual locomotive specifications:

1897 OSL Number	As Built Specs.	Later Specs.	Date Rebuilt
OSL 200	60-16x24	64-17x24	Feb 1883
OSL 201	60-16x24	64-17x24	Jul 1881

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

OSL 4-4-0 — 1 locomotive

1897 OSL Number	First Number	Second Number	Third Number	Fourth Number	Fifth Number	Builder	Builder Number	Date Built	Date Vacated	Notes
OSL 202	UPRR 11	UPRy 11	OSLRy 26	OSLRy 552	OSL&UN 552	Danforth	448	May 1866	Oct 1898	1

General Notes:

a.	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.
b.	The 1900 inventory for OSL does not show OSL 202
c.	Individual locomotive specifications:

	1897 OSL Number	As Built Specs.	Later Specs.	Date Rebuilt
	OSL 202	63-16x24	64-17x24	Jun 1880

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

OSL 4-4-0 — 3 locomotives

1897 OSL Number	First Number	Second Number	Third Number	Fourth Number	Fifth Number	Builder	Builder Number	Date Built	Jan 1900 OSL "Engine New" Date	Date Vacated	Notes
OSL 203	UPRR 34	UPRy 34	OSLRy 19	OSLRy 558	OSL&UN 558	Hinkley & Williams	823	Jun 1867	Apr 1867	1906	1
OSL 204	UPRR 35	UPRy 35	OSLRy 20	OSLRy 559	OSL&UN 559	Hinkley & Williams	824	Jun 1867	Apr 1867	Nov 1909	2
OSL 205	UPRR 33	UPRy 33	OSLRy 25	OSLRy 560	OSL&UN 560	Hinkley & Williams	822	Jun 1867	Jul 1867	Aug 1902	3

General Notes:

a.	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.
b.	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.
c.	Individual locomotive specifications:

1897 OSL Number	As Built Specs.	Later Specs.	Date Rebuilt
OSL 203	60-16x24	62-17x24	Feb 1882
OSL 204	60-16x24	64-17x24	Feb 1885
OSL 205	60-16x24	62-17x24	Dec 1882

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)

OSL 4-4-0 — 9 locomotives

1897 OSL Number	First Number	Second Number	Third Number	Fourth Number	Builder	Builder Number	Date Built	Jan 1900 OSL "Engine New" Date	Date Vacated	1915 OSL Number	Notes
OSL 206	UPRR 19 (2nd)	OSLRy 1	OSLRy 586	OSL&UN 586	Grant	477	Aug 1866	Jul 1867	Nov 1900		1
OSL 207	UPRR 20 (2nd)	OSLRy 2	OSLRy 587	OSL&UN 587	Grant	478	Aug 1866	Aug 1867	1916		2
OSL 208	UPRR 16	OSLRy 3	OSLRy 588	OSL&UN 588	Grant	474	Jul 1866	Apr 1867	1900		3
OSL 209	UPRR 43	OSLRy 4	OSLRy 589	OSL&UN 589	Grant	530	1867	Jul 1867	Bef 1904		4
OSL 210	UPRR 44	OSLRy 5	OSLRy 590	OSL&UN 590	Grant	531	1867	Dec 1882	Jul 1900		5
OSL 211	UPRR 45	OSLRy 6	OSLRy 591	OSL&UN 591	Grant	532	1867	Jun 1868	Mar 1902		6
OSL 212	UPRR 47	OSLRy 9	OSLRy 592	OSL&UN 592	Grant	534	1867	April 1881	Sep 1902		7
OSL 213	UPRR 18	OSLRy 10	OSLRy 593	OSL&UN 593	Grant	476	Aug 1866	Apr 1867	1913		8
OSL 214	UPRR 58	OSLRy 23	OSLRy 594	OSL&UN 594	Grant	551	Mar 1868	Jul 1867		OSL 1000	9

General Notes:

a.	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.
b.	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.
c.	Builder information taken from Robert Lemuth's Grant list.
d.	Individual locomotive specifications:

1897 OSL Number	As Built Specs.	Later Specs.	Date Rebuilt
OSL 206	61-16x24	62-17x24	Jul 1882
OSL 207	61-16x24	64-17x24	Nov 1885
OSL 208	61-16x24	62-17x24	May 1881
OSL 209	61-17x24	62-17x24	Nov 1879
OSL 210	61-17x24	62-17x24	Jun 1880
OSL 211	61-17x24	62-17x24	Sep 1879
OSL 212	61-17x24	62-17x24	Nov 1890
OSL 213	61-16x24	62-17x24	Nov 1880
OSL 214	61-17x24	62-17x24	Jul 1885

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

OSL 4-4-0 — 1 locomotive

1897 OSL Number	First Number	Date To OSL	Builder	Builder Number	Date Built	1915 OSL Number	Notes
OSL 215	PVRR 101	1914	Grant		1867	OSL 1001	1

Description:

Drive Wheel Diameter: 61 inches (later 63 inches)

Cylinders: 16x24 inches (later 17x24 inches)

General Notes:

a.	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

OSL 4-4-0 — 15 locomotives

1897 OSL Number	First Number	Second Number	Builder	Builder Number	Date Built	Date Vacated	Later Number	1915 OSL Number	Notes
OSL 300	U&NRy 726	OSL&UN 726	Baldwin	8372	Feb 1887	1899	OSL 401	OSL 1010	1
OSL 301	U&NRy 727	OSL&UN 727	Baldwin	8375	Feb 1887	Nov 1909			2
OSL 302	U&NRy 728	OSL&UN 728	Baldwin	8381	Feb 1887	1903	SPLA&SL 28		3
OSL 303	U&NRy 729	OSL&UN 729	Baldwin	8382	Feb 1887			OSL 1002	4
OSL 304	U&NRy 730	OSL&UN 730	Baldwin	8383	Feb 1887	(Oct 1901)	BN&O	OSL 1003	5
OSL 305	U&NRy 731	OSL&UN 731	Baldwin	8385	Feb 1887	1903	SPLA&SL 34		6
OSL 306	U&NRy 732	OSL&UN 732	Baldwin	8386	Feb 1887	1899	OSL 403	OSL 1012	7
OSL 307	U&NRy 733	OSL&UN 733	Baldwin	8387	Feb 1887	1899	OSL 402	OSL 1011	8
OSL 308	U&NRy 734	OSL&UN 734	Baldwin	8388	Feb 1887	1903	SPLA&SL 35		9
OSL 309	U&NRy 735	OSL&UN 735	Baldwin	8389	Feb 1887	1903	SPLA&SL 29		10
OSL 310	OSLRy 746	OSL&UN 746	Baldwin	8411	Mar 1887	Sep 1907	SPdeM 150		11
OSL 311	OSLRy 747	OSL&UN 747	Baldwin	8410	Mar 1887	1903	SPLA&SL 30		12
OSL 312	OSLRy 748	OSL&UN 748	Baldwin	8409	Mar 1887	1903	SPLA&SL 31		13
OSL 313	OSLRy 749	OSL&UN 749	Baldwin	8423	Mar 1887	Sep 1907	SPdeM 151		14
OSL 314	OSLRy 750	OSL&UN 750	Baldwin	8424	Mar 1887	1899	OSL 404		15

General Notes:

a.	Individual locomotive specifications:

1897 OSL Number	As Built Specs.	Later Specs.	Date Rebuilt
OSL 300	62-18x26	69-18x26	1897-1899
OSL 301	62-18x26
OSL 302	62-18x26	69-18x26	1897
OSL 303	62-18x26
OSL 304	62-18x26	69-18x26	1897
OSL 305	62-18x26	69-18x26	1897
OSL 306	62-18x26	69-18x26	Jul 1899
OSL 307	62-18x26	69-18x26	Aug 1899
OSL 308	62-18x26	69-18x26	1897
OSL 309	62-18x26	69-18x26	1897
OSL 310	62-18x26
OSL 311	62-18x26	69-18x26	1897
OSL 312	62-18x26	69-18x26	Jul 1897
OSL 313	62-18x26	69-18x26	1897
OSL 314	62-18x26	69-18x26	1897-1899

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 (click here for more BN&O and INRy information)
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

OSL 4-4-0 — 10 locomotives

1897 OSL Number	First Number	Second Number	Builder	Builder Number	Date Built	Date Vacated	Later Number	1915 OSL Number	Notes
OSL 315	U&NRy 751	OSL&UN 751	Grant	1703	May 1887			OSL 1004	1
OSL 316	U&NRy 752	OSL&UN 752	Grant	1704	May 1887	Nov 1901	OSL 450	OSL 1014	2
OSL 317	U&NRy 753	OSL&UN 753	Grant	1705	May 1887			OSL 1005	3
OSL 318	U&NRy 754	OSL&UN 754	Grant	1706	May 1887	1903			4
OSL 319	U&NRy 755	OSL&UN 755	Grant	1707	May 1887			OSL 1006	5
OSL 320	U&NRy 756	OSL&UN 756	Grant	1708	May 1887	1903			6
OSL 321	U&NRy 757	OSL&UN 757	Grant	1709	May 1887	Aug 1907			7
OSL 322	U&NRy 758	OSL&UN 758	Grant	1710	May 1887	Aug 1907			8
OSL 323	U&NRy 759	OSL&UN 759	Grant	1711	May 1887			OSL 1007	9
OSL 324	U&NRy 760	OSL&UN 760	Grant	1712	May 1887	Mar 1901	OSL 400	OSL 1009	10

General Notes:

a.	Individual locomotive specifications:

1897 OSL Number	As Built Specs.	Later Specs.	Date Rebuilt
OSL 315	62-18x26	69-18x26
OSL 316	62-18x26	69-18x26	Nov 1901
OSL 317	62-18x26
OSL 318	62-18x26
OSL 319	62-18x26
OSL 320	62-18x26	69-18x26	1897
OSL 321	62-18x26	69-18x26	1897
OSL 322	62-18x26
OSL 323	62-18x26
OSL 324	62-18x26	69-18x26	Mar 1901

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

OSL 4-4-0 — 1 locomotive

1913 OSL Number	First Number	Date To OSL	Builder	Builder Number	Date Built	1915 OSL Number	Notes
OSL 325	INRy 200	Jan 1913	Baldwin	33302	Mar 1909	OSL 1008	1

Description:

Drive Wheel Diameter: 62 inches

Cylinders: 18x24 inches

General Notes:

a	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

OSL 4-4-0 — 2 locomotives

1897 OSL Number	First Number	Second Number	Third Number	Fourth Number	Builder	Builder Number	Date Built	Date Vacated	Notes
OSL 367	UPRR 144	USRR 3	UCRy 9	OSL&UN 367	Schenectady	547	Mar 1869	1894-1898	1
OSL 368	UPRR 65	(USRR 13)	UCRy 15	OSL&UN 368	Schenectady	503	Aug 1868	1894-1898	2

General Notes:

a.	Individual locomotive specifications

1897 OSL Number	As Built Specs.	Later Specs.	Date Rebuilt
OSL 367	54-16x24	59-16x24
OSL 368	60-16x24	59-16x24

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.

OSL 4-4-0 — 1 locomotive

1897 OSL Number	First Number	Second Number	Third Number	Date To 400 Series	Builder	Builder Number	Date Built	1915 OSL Number	Notes
OSL 400	U&NRy 760	OSL&UN 760	OSL 324	Mar 1901	Grant	1712	Mar 1887	OSL 1009	1

Description:

Drive Wheel Diameter: 69 inches (rebuilt from 62 inches in March 1901)

Cylinders: 18x24 inches

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

OSL 4-4-0 — 4 locomotives

1899 OSL Number	First Number	Second Number	Third Number	Date To 400 Series	Builder	Builder Number	Date Built	Date Vacated	1915 OSL Number	Notes
OSL 401	U&NRy 726	OSL&UN 726	OSL 300	1899	Baldwin	8372	Feb 1887		OSL 1010	1
OSL 402	U&NRy 733	OSL&UN 733	OSL 307	Aug 1899	Baldwin	8387	Feb 1887		OSL 1011	2
OSL 403	U&NRy 732	OSL&UN 732	OSL 306	Jul 1899	Baldwin	8386	Feb 1887		OSL 1012	3
OSL 404	OSLRy 750	OSL&UN 750	OSL 314	1899	Baldwin	8424	Mar 1887	1902		4

General Notes:

a.	Individual locomotive specifications:

1897 OSL Number	As Built Specs.	Later Specs.	Date Rebuilt
OSL 401	62-18x26	69-18x26	1899
OSL 402	62-18x26	69-18x26	Aug 1899
OSL 403	62-18x26	69-18x26	Jul 1899
OSL 404	62-18x26	69-18x26	1899

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

OSL 4-4-0 — 1 locomotive

OSL Number	Previous Number	Date To 400 Series	Builder	Builder Number	Date Built	1915 OSL Number	Notes
OSL 405	UPRy 843	1899	Schenectady	525	Dec 1868	OSL 1013	1

Description:

Drive Wheel Diameter: 54 inches (rebuilt to 69 inches in December 1892)

Cylinders: 16x24 inches (rebuilt to 18x26 inches in December 1892)

General Notes:

a.	Individual locomotive history:

	OSL Number	First Number	Second Number	Third Number	Fourth Number	Fifth Number
	OSL 405	UPRR 123	USRRE 123	UCRy 16	OSL&UN 369	UPRy 843

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

OSL 4-6-0 — 10 locomotives (Vauclain Compound; renumbered upon delivery)

OSL Number	Builder	Builder Number	Date Built	1902 OSL Number	Date Renumbered
OSL 400 (2nd)	Baldwin	20195	Mar 1902	OSL 800 (2nd)	1902
OSL 401 (2nd)	Baldwin	20196	Mar 1902	OSL 801 (2nd)	1902
OSL 402 (2nd)	Baldwin	20197	Mar 1902	OSL 802 (2nd)	1902
OSL 403 (2nd)	Baldwin	20198	Mar 1902	OSL 803	1902
OSL 404 (2nd)	Baldwin	20199	Mar 1902	OSL 804	1902
OSL 405 (2nd)	Baldwin	20200	Mar 1902	OSL 805	1902
OSL 406 (2nd)	Baldwin	20201	Mar 1902	OSL 806	1902
OSL 407 (2nd)	Baldwin	20246	Apr 1902	OSL 807	1902
OSL 408 (2nd)	Baldwin	20247	Apr 1902	OSL 808	1902
OSL 409 (2nd)	Baldwin	20248	Apr 1902	OSL 809	1902

Description: (as Vauclain compound)

Drive Wheel Diameter: 72 inches

Cylinders: 15-1/2&26x28 inches

General Notes:

a.	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
b.	Built as Vauclain compound locomotives; rebuilt to simple in 1906-1909

OSL 4-4-0 — 1 locomotive

1897 OSL Number	First Number	Second Number	Third Number	Builder	Builder Number	Date Built	Date Vacated	Notes
OSL 434	UCRR 6	UCRy 6	OSL&UN 434	Hinkley & Williams	1120	Oct 1872	Bef 1900	1

Description:

Drive Wheel Diameter: 60 inches (later 63 inches)

Cylinders: 16x24 inches

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)

OSL 4-4-0 — 1 locomotive

OSL Number	First Number	Second Number	Third Number	Date To OSL 450	Builder	Builder Number	Date Built	1915 OSL Number	Notes
OSL 450	U&NRy 752	OSL&UN 752	OSL 316 (2nd)	Nov 1901	Grant	1698	May 1887	OSL 1014	1

Description:

Drive Wheel Diameter: 69 inches (rebuilt from 62 inches in November 1901)

Cylinders: 18-5/8x26 inches (rebuilt from 18x26 inches in November 1901)

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

OSL 4-6-0 — 26 locomotives

1897 OSL Number	First Number	Second Number	Third Number	Fourth Number	Builder	Builder Number	Date Built	Jan 1900 OSL "Engine New" Date	Date Vacated	1915 OSL Number	Notes
OSL 500	UPRR 140 (2nd)	OSLRy 14	OSLRy 969	OSL&UN 969	Taunton	648	Nov 1874	Nov 1874	Sep 1901		1
OSL 501	UPRR 139 (2nd)	OSLRy 15	OSLRy 970	OSL&UN 970	Taunton	647	Nov 1874	Nov 1874	Sep 1901		2
OSL 502	UPRy 54 (2nd)	SL&WRy 1	SL&WRy 984	OSL&UN 984	Taunton	863	Aug 1882	Aug 1882	1905		3
OSL 503	UPRy 235	OSLRy 11	OSLRy 966	OSL&UN 966	Taunton	776	Mar 1881	Apr 1881	1911		4
OSL 504	UPRR 134 (2nd)	OSLRy 16	OSLRy 971	OSL&UN 971	Taunton	640	Jul 1874	Aug 1874	After 1900		5
OSL 505	UPRy 123	OSLRy 13	OSLRy 968	OSL&UN 968	Taunton	866	Aug 1882	Sep 1882	1908		6
OSL 506	UPRy 55 (2nd)	OSLRy 7	OSLRy 964	OSL&UN 964	Taunton	864	Aug 1882	Aug 1882	After 1900		7
OSL 507	UPRy 49	OSLRy 12	OSLRy 967	OSL&UN 967	Taunton	861	Aug 1882		1903		8
OSL 508	UPRy 199	OSLRy 28	OSLRy 977	OSL&UN 977	Taunton	732	Apr 1880	Jul 1879	Jun 1900		12
OSL 511	UPRR 184	OSLRy 22	OSLRy 975	OSL&UN 975	Taunton	703	Jun 1879	Apr 1880	1916		9
OSL 509	UPRy 234	OSLRy 17	OSLRy 972	OSL&UN 972	Taunton	775	Mar 1881	Mar 1881	Oct 1901		10
OSL 510	UPRy 246 (1st)	OSLRy 18	OSLRy 973	OSL&UN 973	Taunton	792	Jun 1881	Jul 1881	1901		11
OSL 512	UPRR 133 (2nd)	OSLRy 21	OSLRy 974	OSL&UN 974	Taunton	639	Jul 1874		1903		13
OSL 513	USRR 6	UCRy 12	OSL&UN 1027		Taunton	779	Apr 1881	Aug 1880	1908		14
OSL 514	USRR 7	UCRy 13	OSL&UN 1028		Taunton	782	Apr 1881	Aug 1880	1903		15
OSL 515	UPRy 54 (1st)	UCRy 19	OSL&UN 1029		Taunton	840	Mar 1882		Aug 1899		16
OSL 516	UPRy 55 (1st)	UCRy 20	OSL&UN 1030		Taunton	841	Mar 1882	Aug 1880	Dec 1900		17
OSL 517	UPRy 65	UCRy 22	OSL&UN 1031		Taunton	865	Aug 1882	Aug 1880	1903		18
OSL 518	UPRy 51	OSLRy 8	OSLRy 965	OSL&UN 965	Taunton	862	Aug 1882	Aug 1882	1903		19
OSL 519	OSLRy 31	OSLRy 979	OSL&UN 979		Taunton	898	Nov 1883	Dec 1883	Oct 1900		20
OSL 520	OSLRy 32	OSLRy 980	OSL&UN 980		Taunton	899	Dec 1883	Dec 1883	Jun 1914		21
OSL 521	OSLRy 33	OSLRy 981	OSL&UN 981		Taunton	900	Dec 1883	Dec 1883	May 1916		22
OSL 522	OSLRy 34	OSLRy 982	OSL&UN 982		Taunton	901	Dec 1883	Dec 1883	1903		23
OSL 523	UPRR 107	UPRy 107	UPRy 907	OSL&UN 907	Rhode Island	66	Sep 1868	Feb 1894 UP	1903		24
OSL 524	OSLRy 35	OSLRy 983	OSL&UN 983		Taunton	902	Dec 1883	Feb 1898 OSL		OSL 1500	25
OSL 525	OSLRy 30	OSLRy 978	OSL&UN 978		Taunton	897	Nov 1883	Mar 1898		OSL 1501	26

General Notes:

a.	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.
b.	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
c.	Individual locomotive specifications:

1897 OSL Number	As Built Specs.	Later Specs.	Date Rebuilt
OSL 500	54-18x24	57-18x24
OSL 501	54-18x24	57-18x24
OSL 502	54-18x24	57-18x24
OSL 503	56-18x24	57-18x24
OSL 504	54-18x24	57-18x24
OSL 505	56-18x24	57-18x24
OSL 506	56-18x24	57-18x24
OSL 507	56-18x24	57-18x24
OSL 508	56-18x24	57-18x24
OSL 509	56-18x24	57-18x24
OSL 510	56-18x24	57-18x24
OSL 511	56-18x24	57-18x24
OSL 512	54-18x24	57-18x24
OSL 513	54-18x24	57-18x24
OSL 514	54-18x24	57-18x24
OSL 515	54-18x24	57-18x24
OSL 516	54-18x24	57-18x24
OSL 517	54-18x24	57-18x24
OSL 518	56-18x24	57-18x24
OSL 519	56-18x24	57-18x24
OSL 520	56-18x24	57-18x24
OSL 521	63-18x24	57-18x24
OSL 522	63-18x24	57-18x24
OSL 523	54-18x24	57-18x24	Feb 1894 UP
OSL 524	63-18x24	57-18x24	Feb 1898 OSL
OSL 525	56-18x24	57-18x24	Mar 1898

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)
12.	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
9.	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)

OSL 4-6-0 — 1 locomotive

1913 OSL Number	First Number	Date TO OSL	Builder	Builder Number	Date Built	1915 OSL Number	Notes
OSL 526	INRy 101	Jan 1913	Baldwin	30556	Apr 1907	OSL 1502	1

Description:

Drive Wheel Diameter: 54 inches

Cylinders: 18x24 inches

General Notes:

a.	Idaho Northern Railway was sold to OSL on December 31, 1912; merged with OSL on January 6, 1913 (click here for more INRy information)

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

OSL 0-6-0 — 5 locomotives

OSL Number	Builder	Builder Number	Date Built	1915 OSL Number
OSL 530	Lima	1415	Aug 1914	OSL 4740
OSL 531	Lima	1416	Aug 1914	OSL 4741
OSL 532	Lima	1417	Aug 1914	OSL 4742
OSL 533	Lima	1418	Sep 1914	OSL 4743
OSL 534	Lima	1419	Sep 1914	OSL 4744

Description:

CS Class: S-4

Drive Wheel Diameter: 51 inches

Cylinders: 19x26 inches

OSL 0-6-0 — 2 locomotives (ex Monatna Union)

1897 OSL Number	First Number	Date To OSL	Builder	Builder Number	Date Built	1915 OSL Number	Notes
OSL 550	MURy 107	Oct 1897	New York	504	Sep 1889	OSL 4700	1
OSL 551	MURy 108	Oct 1897	New York	505	Sep 1889	OSL 2044	2

Description:

Drive Wheel Diameter: 51 inches

Cylinders: 18x26 inches

General Notes:

a.	Montana Union Railway 107 and 108 sold to OSL in October 1897 (click here for more information 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.

OSL 0-6-0 — 2 locomotives

OSL Number	First Number	Builder	Builder Number	Date Built	1915 OSL Number	Notes
OSL 552	OSL 560 (1st)	Baldwin	18764	Mar 1901	OSL 4701	1
OSL 553	OSL 561 (1st)	Baldwin	19087	Jun 1901	OSL 4702	2

Description:

Drive Wheel Diameter: 51 inches

Cylinders: 19x26 inches

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

OSL 0-6-0 — 2 locomotives

OSL Number	Builder	Builder Number	Date Built	1915 OSL Number
OSL 558	Brooks	45070	Mar 1908	OSL 4703
OSL 559	Brooks	45071	Mar 1908	OSL 4704

Description:

CS Class: S-2

Drive Wheel Diameter: 51 inches

Cylinders: 19x26 inches

OSL 0-6-0 — 2 locomotives

OSL Number	Builder	Builder Number	Date Built	1908 OSL Number	Notes
OSL 560 (1st)	Baldwin	18764	Mar 1901	OSL 552	1
OSL 561 (1st)	Baldwin	19087	Jun 1901	OSL 553	2

Description:

Drive Wheel Diameter: 51 inches

Cylinders: 19x26 inches

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

OSL 0-6-0 — 5 locomotives

OSL Number	Builder	Builder Number	Date Built	1915 OSL Number
OSL 560 (2nd)	Brooks	45072	Mar 1908	OSL 4705
OSL 561 (2nd)	Brooks	45073	Mar 1908	OSL 4706
OSL 562	Brooks	45074	Mar 1908	OSL 4707
OSL 563	Brooks	45075	Mar 1908	OSL 4708
OSL 564	Brooks	45076	Mar 1908	OSL 4709

Description:

CS Class: S-2

Drive Wheel Diameter: 51 inches

Cylinders: 19x26 inches

OSL 0-6-0 — 4 locomotives

OSL Number	Builder	Builder Number	Date Built	1915 OSL Number
OSL 565	Baldwin	27672	Mar 1906	OSL 4710
OSL 566	Baldwin	27673	Mar 1906	OSL 4711
OSL 567	Baldwin	27697	Mar 1906	OSL 4712
OSL 568	Baldwin	27751	Mar 1906	OSL 4713

Description:

CS Class: S-2

Drive Wheel Diameter: 51 inches

Cylinders: 19x26 inches

OSL 0-6-0 — 4 locomotives

OSL Number	Builder	Builder Number	Date Built	1915 OSL Number
OSL 569	Baldwin	29038	Sep 1906	OSL 4714
OSL 570	Baldwin	29039	Sep 1906	OSL 4715
OSL 571	Baldwin	29040	Sep 1906	OSL 4716
OSL 572	Baldwin	29050	Sep 1906	OSL 4717

Description:

CS Class: S-2

Drive Wheel Diameter: 51 inches

Cylinders: 19x26 inches

OSL 0-6-0 — 4 locomotives

OSL Number	Builder	Builder Number	Date Built	1915 OSL Number
OSL 573	Baldwin	30551	Apr 1907	OSL 4718
OSL 574	Baldwin	30573	Apr 1907	OSL 4719
OSL 575	Baldwin	30581	Apr 1907	OSL 4720
OSL 576	Baldwin	30608	Apr 1907	OSL 4721

Description:

CS Class: S-2

Drive Wheel Diameter: 51 inches

Cylinders: 19x26 inches

OSL 0-6-0 — 3 locomotives

OSL Number	Builder	Builder Number	Date Built	1915 OSL Number
OSL 580	Baldwin	18715	Mar 1901	OSL 4722
OSL 581	Baldwin	18716	Mar 1901	OSL 4723
OSL 582	Baldwin	18717	Mar 1901	OSL 4724

Description:

CS Class: S-2

Drive Wheel Diameter: 51 inches

Cylinders: 19x26 inches

OSL 0-6-0 — 5 locomotives

OSL Number	Builder	Builder Number	Date Built	1915 OSL Number
OSL 583	Cooke	2640	Jan 1901	OSL 4725
OSL 584	Cooke	2641	Jan 1901	OSL 4726
OSL 585	Cooke	2642	Jan 1901	OSL 4727
OSL 586	Cooke	2643	Jan 1901	OSL 4728
OSL 587	Cooke	2644	Jan 1901	OSL 4729

Description:

Drive Wheel Diameter: 51 inches

Cylinders: 21x26 inches

OSL 0-6-0 — 5 locomotives

OSL Number	Builder	Builder Number	Date Built	1915 OSL Number
OSL 588	Baldwin	23706	Feb 1904	OSL 4730
OSL 589	Baldwin	23707	Feb 1904	OSL 4731
OSL 590	Baldwin	23726	Feb 1904	OSL 4732
OSL 591	Baldwin	23727	Feb 1904	OSL 4733
OSL 592	Baldwin	23843	Mar 1904	OSL 4734

Description:

CS Class: S-1

Drive Wheel Diameter: 57 inches

OSL 0-6-0 — 5 locomotives

OSL Number	Builder	Builder Number	Date Built	1915 OSL Number
OSL 593	Baldwin	38056	Jul 1912	OSL 4735
OSL 594	Baldwin	38057	Jul 1912	OSL 4736
OSL 595	Baldwin	38058	Jul 1912	OSL 4737
OSL 596	Baldwin	38090	Aug 1912	OSL 4738
OSL 597	Baldwin	38091	Aug 1912	OSL 4739

Description:

CS Class: S-3

Drive Wheel Diameter: 51 inches

Cylinders: 19x26 inches

OSL 4-6-0 — 11 locomotives

1897 OSL Number	First Number	Builder	Builder Number	Date Built	Date Rebuilt	Later Number	1915 OSL Number	Notes
OSL 600	OSL&UN 1416	Rhode Island	2475	Nov 1890	1901	OSL 651		1
OSL 601	OSL&UN 1417	Rhode Island	2476	Nov 1890	1900	OSL 652		2
OSL 602	OSL&UN 1418	Rhode Island	2477	Dec 1890			OSL 1503	3
OSL 603	OSL&UN 1419	Rhode Island	2478	Dec 1890			OSL 1504	4
OSL 604	OSL&UN 1420	Rhode Island	2479	Dec 1890	1900	OSL 653		5
OSL 605	OSL&UN 1421	Rhode Island	2480	Dec 1890			OSL 1505	6
OSL 606	OSL&UN 1422	Rhode Island	2481	Dec 1890			OSL 1506	7
OSL 607	OSL&UN 1423	Rhode Island	2482	Dec 1890	1900	OSL 654		8
OSL 608	OSL&UN 1424	Rhode Island	2483	Dec 1890			OSL 1507	9
OSL 609	OSL&UN 1425	Rhode Island	2484	Dec 1890	1902	OSL 680		10
OSL 610	OSL&UN 1426	Rhode Island	2485	Dec 1890	1902	OSL 682		11

General Notes:

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

1897 OSL Number	As Built Specs.	Later Specs.	Date Rebuilt
OSL 600	62-19x24	69-20x26	1901
OSL 601	62-19x24	69-20x26	1900
OSL 602	62-19x24
OSL 603	62-19x24
OSL 604	62-19x24	69-20x26	1900
OSL 605	62-19x24
OSL 606	62-19x24
OSL 607	62-19x24	69-20x26	1900
OSL 608	62-19x24
OSL 609	62-19x24	57-19x26	1902
OSL 610	62-19x24	57-19x26	1902

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

OSL 4-6-0 — 6 locomotives (Belpaire fireboxes)

1897 OSL Number	First Number	Builder	Builder Number	Date Built	1915 OSL Number	Notes
OSL 611	OSL&UN 1459	Rhode Island	2506	Feb 1891	OSL 1508	1
OSL 612	OSL&UN 1460	Rhode Island	2507	Feb 1891	OSL 1509	2
OSL 613	OSL&UN 1461	Rhode Island	2508	Feb 1891	OSL 1510	3
OSL 614	OSL&UN 1462	Rhode Island	2509	Feb 1891	OSL 1511	4
OSL 615	OSL&UN 1463	Rhode Island	2510	Feb 1891	OSL 1512	5
OSL 616	OSL&UN 1464	Rhode Island	2511	Feb 1891	OSL 1513	6

Description:

Drive Wheel Diameter: 62 inches

Cylinders: 19x24 inches

General Notes:

a.	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

OSL 4-6-0 — 2 locomotives

1897 OSL Number	First Number	Builder	Builder Number	Date Built	Date Rebuilt	Later Number	Notes
OSL 617	OSL&UN 1427	Rhode Island	2486	Dec 1890	1903	OSL 683	1
OSL 618	OSL&UN 1428	Rhode Island	2487	Dec 1890	1901	OSL 659	2

General Notes:

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

1897 OSL Number	As Built Specs.	Later Specs.	Date Rebuilt
OSL 617	62-19x24	57-19x26	1903
OSL 618	62-19x24	69-20x26	1901

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

OSL 4-6-0 — 18 locomotives

1897 OSL Number	First Number	Builder	Builder Number	Date Built	Later Number	Date Vacated	1915 OSL Number	Notes
OSL 619	OSL&UN 1441	Rhode Island	2488	Jan 1891			OSL 1514	1
OSL 620	OSL&UN 1442	Rhode Island	2489	Dec 1890	OSL 655	1901		2
OSL 621	OSL&UN 1443	Rhode Island	2490	Jan 1891			OSL 1515	3
OSL 622	OSL&UN 1444	Rhode Island	2491	Dec 1890	OSL 656	1901		4
OSL 623	OSL&UN 1445	Rhode Island	2492	Jan 1891			OSL 1516	5
OSL 624	OSL&UN 1446	Rhode Island	2493	Jan 1891			OSL 1517	6
OSL 625	OSL&UN 1447	Rhode Island	2494	Jan 1891			OSL 1518	7
OSL 626	OSL&UN 1448	Rhode Island	2495	Jan 1891	OSL 658	1901		8
OSL 627	OSL&UN 1449	Rhode Island	2496	Jan 1891			OSL 1519	9
OSL 628	OSL&UN 1450	Rhode Island	2497	Jan 1891	OSL 670	1901		10
OSL 629	OSL&UN 1451	Rhode Island	2498	Jan 1891			OSL 1520	11
OSL 630	OSL&UN 1452	Rhode Island	2499	Jan 1891			OSL 1521	12
OSL 631	OSL&UN 1453	Rhode Island	2500	Feb 1891			OSL 1522	13
OSL 632	OSL&UN 1454	Rhode Island	2501	Feb 1891			OSL 1523	14
OSL 633	OSL&UN 1455	Rhode Island	2502	Feb 1891			OSL 1524	15
OSL 634	OSL&UN 1456	Rhode Island	2503	Feb 1891	OSL 681	1902		16
OSL 635	OSL&UN 1457	Rhode Island	2504	Feb 1891			OSL 1525	17
OSL 636	OSL&UN 1458	Rhode Island	2505	Feb 1891			OSL 1526	18

General Notes:

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

1897 OSL Number	As Built Specs.	Later Specs.	Date Rebuilt	Later Specs.	Date Rebuilt
OSL 619	62-19x24	51-19x24	1897
OSL 620	62-19x24	69-20x26	1901
OSL 621	62-19x24	51-19x24	1897
OSL 622	62-19x24	69-20x26	1901
OSL 623	62-19x24	51-19x24	1894
OSL 624	62-19x24	51-19x24	1894
OSL 625	62-19x24	51-19x24
OSL 626	62-19x24	69-20x26	1901
OSL 627	62-19x24	51-19x24
OSL 628	62-19x24	57-22&34x26 (compound)	1901	57-19x26	1907
OSL 629	62-19x24	51-19x24
OSL 630	62-19x24	51-19x24
OSL 631	62-19x24	51-19x24
OSL 632	62-19x24	51-19x24
OSL 633	62-19x24	51-19x24
OSL 634	62-19x24	57-19x26	1902
OSL 635	62-19x24	51-19x24
OSL 636	62-19x24	51-19x24

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

OSL 4-6-0 — 6 locomotives

1897 OSL Number	First Number	Builder	Builder Number	Date Built	Later Number	Date Rebuilt	1915 OSL Number	Notes
OSL 637	OSL&UN 1465	Cooke	2071	Oct 1890	OSL 671	1901		1
OSL 638	OSL&UN 1466	Cooke	2072	Oct 1890			OSL 1527	2
OSL 639	OSL&UN 1467	Cooke	2073	Oct 1890	OSL 657	1901		3
OSL 640	OSL&UN 1468	Cooke	2074	Oct 1890	OSL 650	1900		4
OSL 641	OSL&UN 1469	Cooke	2075	Oct 1890			OSL 1528	5
OSL 642	OSL&UN 1470	Cooke	2076	Oct 1890			OSL 1529	6

General Notes:

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

1897 OSL Number	As Built Specs.	Later Specs.	Date Rebuilt	Later Specs.	Date Rebuilt
OSL 637	62-19x24	57-14&24x26 (compound)	1901	57-19x26	1907
OSL 638	62-19x24	51-19x24	1897
OSL 639	62-19x24	69-20x26	Jun 1901
OSL 640	62-19x24	69-20x26	Jun 1900
OSL 641	62-19x24	51-19x24
OSL 642	62-19x24	51-19x24

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

OSL 4-6-0 — 3 locomotives

1897 OSL Number	Builder	Builder Number	Date Built	1900 Date "Engine New"	1915 OSL Number	Notes
OSL 643				Mar 1891
OSL 644				Mar 1891
OSL 645				Dec 1890

General Notes:

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

OSL 4-6-0 — 1 locomotive (rebuilt from 600 Series)

1900 OSL Number	First Number	Second Number	Date To 650 Series	Builder	Builder Number	Date Built	1915 OSL Number	Notes
OSL 650	OSL&UN 1468	OSL 640	Jun 1900	Cooke	2074	Oct 1890	OSL 1530	1

General Notes:

a.	The number-to-number sequence from 600 series to 650 series is not confimed.
b.	Individual locomotive specifications:

	OSL Number	As Built Specs.	Later Specs.	Date Rebuilt
	OSL 650	62-19x24	69-20x26	Jun 1900

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

OSL 4-6-0 — 6 locomotives (rebuilt from 600 Series)

1900 OSL Number	First Number	Second Number	Date To 650 Series	Builder	Builder Number	Date Built	1915 OSL Number	Notes
OSL 651	OSL&UN 1416	OSL 600	1901	Rhode Island	2475	Nov 1890	OSL 1531	2
OSL 652	OSL&UN 1417	OSL 601	1900	Rhode Island	2476	Nov 1890	OSL 1532	3
OSL 653	OSL&UN 1420	OSL 604	1900	Rhode Island	2479	Dec 1890	OSL 1533	4
OSL 654	OSL&UN 1423	OSL 607	1900	Rhode Island	2482	Dec 1890	OSL 1534	5
OSL 655	OSL&UN 1442	OSL 620	1901	Rhode Island	2489	Dec 1890	OSL 1535	6
OSL 656	OSL&UN 1444	OSL 622	1901	Rhode Island	2491	Dec 1890	OSL 1536	7

General Notes:

a.	The number-to-number sequence from 600 series to 650 series is not confimed.
b.	Individual locomotive specifications:

OSL Number	As Built Specs.	Later Specs.	Date Rebuilt
OSL 651	62-19x24	69-18-1/2x26	1901
OSL 652	62-19x24	69-18-1/2x26	1900
OSL 653	62-19x24	69-18-1/2x26	1900
OSL 654	62-19x24	69-18-1/2x26	1900
OSL 655	62-19x24	69-18-1/2x26	1901
OSL 656	62-19x24	69-18-1/2x26	1901

Notes:

2.	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)
3.	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
4.	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
5.	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
6.	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
7.	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

OSL 4-6-0 — 1 locomotive (rebuilt from 600 Series)

1901 OSL Number	First Number	Second Number	Date To 650 Series	Builder	Builder Number	Date Built	1915 OSL Number	Notes
OSL 657	OSL&UN 1467	OSL 639	Jun 1901	Cooke	2073	Oct 1890	OSL 1537	1

General Notes:

a.	The number-to-number sequence from 600 series to 650 series is not confimed.
b.	Individual locomotive specifications:

	OSL Number	As Built Specs.	Later Specs.	Date Rebuilt
	OSL 657	62-19x24	69-18-1/2x26	Jun 1901

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

OSL 4-6-0 — 2 locomotives (rebuilt from 600 Series)

1901 OSL Number	First Number	Second Number	Date To 650 Series	Builder	Builder Number	Date Built	1915 OSL Number	Notes
OSL 658	OSL&UN 1448	OSL 626	1901	Rhode Island	2495	Jan 1891	OSL 1538	9
OSL 659	OSL&UN 1428	OSL 618	1901	Rhode Island	2487	Dec 1890	OSL 1539	10

General Notes:

a.	The number-to-number sequence from 600 series to 650 series is not confimed.
b.	Individual locomotive specifications:

OSL Number	As Built Specs.	Later Specs.	Date Rebuilt
OSL 658	62-19x24	69-18-1/2x26	1901
OSL 659	62-19x24	69-18-1/2x26	1901

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

OSL 4-6-0 — 2 locomotives (compound cylinders)

1901 OSL Number	First Number	Second Number	Date Rebuilt To Compound	Builder	Builder Number	Date Built	Later Number	Date Rebuilt To Simple	Notes
OSL 670	OSL&UN 1450	OSL 628	1901	Rhode Island	2497	Jan 1891	OSL 684	1907	1
OSL 671	OSL&UN 1465	OSL 637	1901	Cooke	2071	Oct 1890	OSL 685	1907	2

General Notes:

a.	Individual locomotive specifications:

OSL Number	As Built Specs.	Compound Cylinders	Date To Compound	Simpled Cylinders	Date To Simple
OSL 670	62-19x24	57-22&34x26	1901	57-19-1/2x26	1907
OSL 671	62-19x24	57-14&24x26	1901	57-19-1/2x26	1907

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

OSL 4-6-0 — 3 locomotives (rebuilt from 600 Series)

1902 OSL Number	First Number	Second Number	Date To 680 Series	Builder	Builder Number	Date Built	1915 OSL Number	Notes
OSL 680	OSL&UN 1425	OSL 609	1902	Rhode Island	2484	Dec 1890	OSL 1540	1
OSL 681	OSL&UN 1456	OSL 634	1902	Rhode Island	2503	Feb 1891	OSL 1541	2
OSL 682	OSL&UN 1426	OSL 610	1902	Rhode Island	2485	Dec 1890	OSL 1542	3
OSL 683	OSL&UN 1427	OSL 617	1903	Rhode Island	2486	Dec 1890	OSL 1543	4

Description:

Drive Wheel Diameter: 57 inches (rebuilt from 62 inches in 1902)

Cylinders: 19-1/2x26 inches (rebuilt from 19x24 inches in 1902)

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

OSL 4-6-0 — 1 locomotives (rebuilt from 600 Series)

1902 OSL Number	First Number	Second Number	Date To 680 Series	Builder	Builder Number	Date Built	1915 OSL Number	Notes
OSL 683	OSL&UN 1427	OSL 617	1903	Rhode Island	2486	Dec 1890	OSL 1543	1

Description:

Drive Wheel Diameter: 57 inches (rebuilt from 62 inches in 1903)

Cylinders: 18-1/2x26 inches (rebuilt from 19x24 inches in 1903)

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

OSL 4-6-0 — 1 locomotives (simple, rebuilt from compound)

1907 OSL Number	First Number	Second Number	Third Number	Date To 680 Series	Builder	Builder Number	Date Built	1915 OSL Number	Notes
OSL 684	OSL&UN 1450	OSL 628	OSL 670	1907	Rhode Island	2497	Jan 1891	OSL 1544	1

Description:

Drive Wheel Diameter: 57 inches (rebuilt from 62 inches in 1901)

Cylinders: 18-1/2x26 inches (rebuilt from 22&34x26 compound in 1907)

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

OSL 4-6-0 — 1 locomotives (simple, rebuilt from compound)

1907 OSL Number	First Number	Second Number	Third Number	Date To 680 Series	Builder	Builder Number	Date Built	1915 OSL Number	Notes
OSL 685	OSL&UN 1465	OSL 637	OSL 671	1907	Cooke	2071	Oct 1890	OSL 1545	1

Description:

Drive Wheel Diameter: 57 inches (rebuilt from 62 inches in 1901)

Cylinders: 20x26 inches (rebuilt from 14&24x26 compound in 1907)

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

***