Union Pacific Railroad

General Notes:

1. UP 1200-1205 were delivered to UP as 1060, 1059, 1058, 1057, 1056 and 1055 in reverse order of builder's number sequence for unknown reasons, renumbered to UP 1200-1205 in builder's number sequence in May 1945.
2. UP 1200-1205, as 1055-1060 series, delivered in UP's black switcher paint scheme, repainted to yellow in late 1947.
3. UP 1200-1205 were in service at Omaha, Nebraska, during June 1960.
4. UP 1200 had Baldwin order number 42530-J.
5. UP 1201-1203 had Baldwin order number 43502-B.
6. UP 1204, 1205 had Baldwin order number 43506-A.

General Notes:

1. UP 1206-1210 were in service at Omaha, Nebraska, during June 1960.
2. Union Pacific records show model as DS-4 4 1000/1SC.
3. UP 1206-1210 had Baldwin order number 47521-D.

General Notes:

1. Built as Spokane International Railway 200-211; acquired by Union Pacific along with 99% control of railroad, on 6 October 1958.
2. Union Pacific leased all 12 locomotives from Spokane International in 1962 and repainted them to UP's standard yellow and gray paint scheme, with Spokane International spelled out in UP's rounded Gothic style lettering.
3. Operated on Spokane International until leased to UP in 1962, then moved by UP to Eastern District; assigned to Denver during 1965 and Kansas City during 1967.
4. UP 1211-1216 had Alco order number S-3112.
5. UP 1217-1219 had Alco order number S-3121.
6. UP 1220-1222 had Alco order number S-3188.

General Notes:

1. Some builder lists show the build date as January 25, 1948, the date of sale to UP.
2. Built as Baldwin demonstrator 1500; sold to UP in January 1948.
3. Equipped with a steam generator.
4. UP 1250 was UP's first six-axle road switcher, entering service on 25 January 25, 1948 at Spokane, Washington.
5. Union Pacific records show model as 0-6-6-0 1500/1 DE 30.
6. UP 1250 had Baldwin order number 45512-B.
7. (Read more about UP's Baldwin Road Switchers)

General Notes:

1. UP 1250 was built as Mount Hood Railway 50; acquired on 16 October 1968, along with the entire railroad.
2. UP 1250 repainted to full UP yellow and gray in February 1969.
3. There is a Jack Pfeifer photo of UP 1250 at the Albina engine shop in Portland on May 5, 1969; this photo also shows a snowplow on the cab end of the unit; there is also a Ken Ardinger photo dated August 1, 1969 that shows UP 1250 in fresh paint but back on the Mount Hood branch line. (Modeler Railroader forum, July 9, 2013)
4. UP 1250 had Alco order number S-3153.

General Notes:

1. Built as Newburgh & South Shore 2, Cleveland, Ohio; renumbered to 1002; sold to Mount Hood Railway 51 in November 1954; acquired by UP on 16 October 1968 along with entire railroad.
2. UP 1251 had only been renumbered and did not receive full UP yellow and gray paint by the time it was retired.
3. UP 1251 had Alco order number S-1810.

General Notes:

1. Built by Baldwin-Lima-Hamilton Corporation; Baldwin Locomotive Works merged with Lima-Hamilton Corporation on December 4, 1950 to form the Baldwin-Lima Hamilton Corporation.
2. UP 1260-1265 had Baldwin order number 50529-E.
3. (Read more about UP's Baldwin Road Switchers)

General Notes:

1. UP 1270 built as Bamberger Railroad 570, an Alco RS-1; Bamberger 570 was re-engined by EMD in December 1951 using a 12-cylinder EMD 567 1000 horsepower engine and a new EMD-design long hood; Bamberger 570 was sold to UP in May 1959, along with portions of the Bamberger Railroad in the Ogden, Utah, area.
2. January 1960 -- "NEW HOME FOR THE HYBRID: Union Pacific, a railroad known for variety in motive power, has picked up an odd one: Bamberger Railroad diesel 570, now UP 1270. Bamberger (which folded last year ) got the early road-switcher from Alco-GE in 1943. Although the few units built up to that time had been partly requisitioned for wartime use in Iran, the Utah electric rated One complete with heating boiler (and a trolley pole to throw signals ) for its troop trains. The Alco's silhouette became truly unforgettable in 1951, when upgrading at La Grange gave it an EMD hood." (Trains magazine, January 1960, page 14)
3. Operated by UP on Eastern District; assigned during 1965 to Denver.
4. UP 1270 has Alco order number S-1901.

General Notes:

1. Rebuilt by UP Omaha Shops from UP SW7s, SW9, TR5As, former MP SW9s, and former WP SW9s.
2. UP 1200 was completed as SW10 1848 on 2 August 1979, renumbered to UP 1200 on 13 March 1980.
3. UP 1201 was completed as SW10 1839 in November 1979, renumbered to UP 1201 on 1 April 1980.
4. UP 1202 was completed as SW10 1866, with a completion date of 25 January 1980; renumbered to UP 1202 sometime after 29 January 1980, the date of a recently discovered slide. (update from John Benson via email dated December 2, 2014)
5. UP 1214, 1215, 1216, 1217, 1218, 1219 were completed during the period that Union Pacific used black cab-side numbers, November 1980 to late April 1981.
6. UP 1205 was wrecked during 1981; damage repaired in July 1981 by using the cab from retired UP SW7 1812.
7. UP 1207, 1212, 1213, 1217, 1218, 1220, 1221, 1222, 1225, 1228, 1230, 1231, 1236, 1240, 1274 (2nd), and 1284 (16 units) were stored at Salt Lake City during mid-July 1998 following their retirement. Eight units (UP 1207, 1213, 1220, 1221, 1228, 1231, 1274 (2nd), and 1284) had been stored out of service at Salt Lake since mid-May 1998.
8. UP 1256, 1264 (2nd), 1276, and 1284 (four units) were retired on 15 July 1998, and were the last SW10s retired by UP, although several SW10s continued to operate in various yards across the system for another two weeks due to a shortage of switching locomotives.
9. Above "Rebuilt From" column does not include full history of each unit.

Notes:

1. UP 1200 was sold to Boise Locomotive Co., Boise, Idaho, on 15 April 1999; sold to Diesel Supply, Hudson, Wisconsin, in July 1999; moved on 13 July 1999 to Columbia Basin Railroad at Yakima, Washington, for repairs and repainting; moved from Yakima to Delta, Utah, as DLSX 1200 during early April 2000; leased to Circle 4 Farms, Milford, Utah (replacing a wrecked TrackMobile); lettered as Hog Express.
2. UP 1201 was renumbered to UP 1241 (2nd), 6 November 1997.
3. UP 1202 was sold to Farmers Grain Co-op, Cruger (Eureka), Illinois, in August 1998; seen switching the Grainland Co-Op in Eureka, Illinois, on September 18, 2004; still there as of September 2008; still there as of August 2017. (2004 update from Ken Lanovich, email dated September 18, 2004; 2008 update from Ken Ardinger, email dated October 20, 2008; 2017 update from Karl Sollmann, email August 23, 2017)
4. UP 1203 and 1273 were retired and sold to Helm Financial in February 1997; moved to Metro East Industries, East St. Louis, Illinois; UP 1203 was wrecked in a yard switching accident on December 18, 1989 at East Los Angeles, California.
5. UP 1204, 1205, 1207, 1211, 1218, 1223, 1225, 1226, 1228, 1237 (2nd), 1241 (2nd), 1244, 1256, 1264 (2nd), 1276, 1284 (16 units) were sold to David J. Joseph Co. in July 1998. Further dispositions as follows:

General Notes:

1. UP 1280-1289 were built as 1180-1189; renumbered to 1280-1289 in October 1955 to make room in the 1100 series for additional Alco S-4 switchers.
2. UP 1290 was built as Alco demonstrator 1190, in UP yellow and gray paint; sold to UP on 19 March 1948; renumbered to 1290 in October 1955 to make room in the 1100 series for additional Alco S-4 switchers.
3. UP 1280 and 1281 had 235,000 pounds operating weight and 156,600 pounds weight on drivers.
4. UP 1282, 1283, 1286, 1287, 1288, and 1289 had 274,000 pounds operating weight and 193,900 pounds weight on drivers, which included an additional 800 gallon fuel tank.
5. UP 1284 and 1285 had 264,400 pounds operating weight and 188,100 pounds weight on drivers.
6. UP 1281, 1282, 1287, and 1289 were equipped for multiple unit operation.
7. UP 1280 had Alco order number S-3053 (shared with UP RS-2s 1193, 1194)
8. UP 1281-1289 had Alco order number S-3063.
9. UP 1290 had Alco order nnumber S-3024.

General Notes:

1. UP 1291-1295 were built as UP 1191-1195; renumbered to UP 1291-1295 in October 1955 to make room in the 1100 series for additional Alco S-4 switchers.
2. Alco order numbers:

General Notes:

1. Built as Pittsburgh & Lake Erie (P&LE) units; purchased second-hand by UP in December 1984; these 10 units were delivered to UP on 12 February 1985.
2. UP 1284 (ex P&LE 1582) was the first of this group to be fully repainted to UP, completed on 18 April 1985; the other units received only UP initials and numbers in white stencils on their P&LE black paint schemes, retaining this scheme until painted full UP yellow and gray, with 1000 series numbers, in May and June 1985.
3. UP added side handrails for improved safety.
4. Assigned UP 1275-1284 series in February 1985, in number sequence after UP's SW10s 1200-1274; assigned UP 1000-1014 series in May 1985, with the pending arrival of five additional units, which became UP 1010-1014.
5. (Read more about the UP 1000-1014 series)

Notes:

1. UP 1275, 1277, 1278, 1279, 1284 operated in PL&E black paint with UP 1275-series numbers until each was repainted to full UP yellow and gray paint in late March and April 1985. (updates from Tim Vana via email dated October 8, 2013; and Zack Hilton via email dated February 1, 2015)
2. UP 1282 operated as UP 1574, in P&LE black paint, from 19 March 1985 to June 1985, when it received full UP yellow and gray paint, and its new UP 1007 number.

General Notes:

1. Fueled by natural gas; assigned to switching service in Los Angeles area from September 1994 to July 1998.
2. UP 1298 was completed in November 1993, and remained at Boise for testing; UP 1299 was completed in late December 1993, and both units were unveiled in public ceremony by the newly organized MK Rail at Boise on January 13, 1994.
3. UP 1298 was built using frame of retired Boston & Maine GP9 1729, frame number 7549-03, serial number 23227.
4. UP 1299 was built using frame of retired Seaboard GP9 2358, frame number 5024-02, serial number 10548.
5. Both units entered service at Salt Lake City, Utah, on July 12, 1994; transferred to Los Angeles on July 27, 1994; both units were out of service at Los Angeles until special fueling facilities could be completed during September 1994.
6. Lease expired, and units returned to Motive Power Industries (successor to MK Rail), July 1, 1998; stored at Boise until 2005 when they were leased to BNSF for use on Los Angeles Junction Railway, along side the two other MK1200G units leased by AT&SF (later BN, then BNSF) to LAJ; in service as BNSF 1202 and 1203 until mid May 2012, then stored pending return of all four units to MK (Wabtec).
7. Assigned UP 98 and 99 in December 1997, not renumbered prior to retirement.
8. Sean Graham-White wrote the following in an article published in 2002 in CTC Board magazine: "M-K chose a straight LNG system rather than dual-fuel because they believed the latter is harder to control. One disadvantage was that the combustion technology available when the units were built resulted in reduced engine RPM (1500 vs. normally 1800) meaning a reduction in horsepower from 2000 to 1200."