Union Pacific Railroad

General Notes:

1. UP 410 was equipped with Dynavane primary and Roto-namic engine air filters, replacing the original carbody and secondary oil bath engine air filters.
2. UP 414 was modified with an upgraded electrical cabinet, AR10 alternator, and 645 power assemblies in May 1974, as a prototype for a rebuild program for UP's large fleet of SD24s, to improve reliability and bring them up to current SD40-2 standards. Some internal UP documents refer to the unit as an SD24-4. SD24M 3100 (ex UP 423) in 1968 was also part of this search for rebuilding technologies for the 79-unit SD24 fleet.
3. UP 423 was rebuilt to SD24M 3100 in August 1968. The rebuild included a constant speed EMD 16-645 3000 horsepower engine (with speed control taking place by changing the level of excitation of the main generator) and traction motors permanently connected in parallel. UP tried many other features, including a variable dynamic braking feature, first used on the small 51-75 single unit turbines. UP 3100 was also the first unit on UP to have the capability of a self-load test, rather than being connected to an external load box. This self load feature was first delivered on UP's DDA40Xs, and on almost all production units from EMD after 1971.
4. Beginning in the early and mid 1970s, UP SD24s worked as heavy yard switchers. UP 414 and 419 were long-time residents of Ogden, Utah, yard. In early 1979, UP's remaining 21 SD24 A-units were all reassigned from secondary road service to yard service, with most being assigned to the huge twin hump yards at North Platte, Nebraska, replacing the ailing 2800-class GE U28Cs.
5. UP 407, 416, 418, 421, and 427 were sold to Precision National Corp. and rebuilt to 1800 horsepower, non-turbocharged. Used in Precision's national lease fleet until sale to C&NW in March 1982. Renumbered to C&NW 6600 class. Returned to UP in the UP/C&NW merger, assigned new UP numbers 2896-2899 (none renumbered prior to retirement by UP).
6. Built on EMD order number 5602.

General Notes:

1. UP 445-447 were built as EMD SD24 demonstrators 7200-7202, for service on SP; painted in SP's new, at that time, gray and red nose scheme, equipped with low noses and red warning lights mounted on low noses; sold to UP in August 1961; UP 446 was set-up by UP at Omaha on 3 August 1961.
2. UP 446 was the last operating SD24 on UP; operating with UP yard slug S4 in track maintenance ballast sled service until May 1985.
3. Built on EMD order number 5623.

General Notes:

1. UP 448 was built as EMD SD24 demonstrator 5579; equipped with a central air intake filter section and winterization hatch located over the turbocharger/main generator area; rebuilt by EMD in August 1960 to production SD24 configuration; sold to UP on August 1, 1961. For warranty purposes, Union Pacific's records show the unit as being built in August 1960, the same time that EMD rebuilt the locomotive. The builder's plate showed the build date as July 1958.
2. Built on EMD order number 5579.

Notes:

1. UP 448 was sold to Precision National Corp., Mount Vernon, Illinois, 27 March 1981; sold to ICG, rebuilt to ICG SD20 2026 in April 1982; stored unserviceable by August 1996; to National Railway Equipment in May 1997, in national lease service as NREX 2026; to Pacific Harbor Line, Long Beach, California, in July 2003 as PHL 2026, stored in late December 2007 by PHL upon arrival of new genset units; moved in mid 2008 to Gulf Coast Switching in Dayton (Houston), Texas, as GCSX 2026 [Gulf Coast Switching is owned by Anacostia, which also owns PHL; Gulf Coast Switching start up was in October 2008]

General Notes:

1. UP 408B was the last operating SD24B on UP, removed from service on 14 April 1979.
2. During late 1979 and early 1980 there were stacks of trucks from scrapped UP SD24s at Precision National's salvage yard in Mount Vernon, Illinois
3. Built on EMD order number 5602, frame numbers 5602-B1 to B45.

General Notes:

1. Built as UP 775-784, renumbered to UP 450-459 between December 1962 and February 1963.
2. Ten motor electric trailer pairs: 454-S2 assigned to at Pocatello, Idaho; 458-S3 and 459-S1 were assigned to North Platte, Nebraska.
3. UP 457 was equipped with a snowplow pilot, a standby water heater for severe winter weather, and had a lighter operating weight for service on the Coalmont Branch out of Laramie.
4. UP 458 and 459 were equipped with steam generators for standby passenger service.
5. UP 450-456 had 363,500 pounds operating weight; UP 457 had 337,800 pounds operating weight; UP 458 and 459 had 325,500 pounds operating weight in freight service and 361,400 pounds operating weight in passenger service. UP 458 and 459 had 350,500 pounds operating weight after removal of their steam generators.
6. Built on EMD order number 5244.

Notes:

1. UP 450 was sold for scrap to Azcon Hyman Michaels, Alton, Illinois, 2 April 1981.
2. UP 451 was sold for scrap to Naporano Iron & Metal, Newark, N.J., 14 April 1981.
3. UP 452 was sold to Bargains Galore on 4 March 1981; sold for scrap to Joseph Simon & Sons, Tacoma, Washington, still there in August 1983.
4. UP 453 was sold to Precision National Corp., Mount Vernon, Illinois, 27 March 1981; sold to ICG, rebuilt to ICG SD20 2030, completed in June 1982. In service during early 1997 as Chicago Central & Pacific 2030; sold to National Railway Equipment in April 1997; in national lease service as NREX 2030.
5. UP 454 was sold for scrap to David J. Joseph Co., Plymouth, Utah in February 1986.
6. UP 455 was sold to Precision National Corp., Mount Vernon, Illinois, 27 March 1981; sold to ICG, rebuilt to ICG SD20 2034, completed in August 1982. Stored out of service by August 1996.
7. UP 456 was sold to Precision National Corp., Mount Vernon, Illinois, in December 1978; rebuilt to SD10 by ICG at Paducah, Kentucky, completed in February 1980; sold to LAMCO (Liberia) 315 in March 1980. (Photo in LN II 131-15. LAMCO roster in LN II 135-1,6).
8. UP 457 was wrecked; sold to Naporano Iron & Metal, Newark, N.J., 12 February 1979; sold to Precision National Corp., Mount Vernon, Illinois, rebuilt to SD10 by ICG at Paducah, Kentucky; sold to LAMCO (Liberia) 316 in March 1980.
9. UP 458 was sold to Precision National Corp., Mount Vernon, Illinois, 27 March 1981; sold to ICG, rebuilt to ICG SD20 2032, completed in July 1982. In service during early 1997 as Chicago Central & Pacific 2032; sold to National Railway Equipment in May 1997; in national lease service as NREX 2032.
10. UP 459 was sold to Great Northern Transportation (Colorado & Eastern Railroad; COE) in February 1983; sold for scrap to Pielet Brothers on 7 August 1988.

General Notes:

1. Built as UP 700-729; renumbered to UP 470-499 series in 1962/63 to avoid conflict with new GP30s.
2. UP 487 was the last operating GP20 on UP, retired in February 1984 and sold for scrap in August 1985.
3. UP 470, 471, 472, 473, 479, 488, and 497 (seven units) were sold to Precision National Corp.; rebuilt to GP21s, with 2000 horsepower, non-turbocharged 16-645 engines; six units sold to South East Coal Co. (SECX) in March 1979, which used them in dedicated unit coal train service on L&N from mines at Isom, Tolson, and Premeir, Kentucky, to the preparation plant at Calla, Kentucky; about 120 miles. SEC entered bankruptcy in November 1990 and the units were sold to National Railway Equipment in March 1991; see individual units for further details.
4. Built on EMD order number 5624.

Notes:

1. UP 470 was sold to Precision National Corp., Mount Vernon, Illinois, in October 1977; rebuilt to GP21; sold to South East Coal Company (SECX) 2001, Ravenna, Kentucky, in March 1979; sold to National Railway Equipment, 30 March 1991, leased to Arizona & California 2001 in May 1991; returned to NRE, in national lease service as NREX 2001.
2. UP 471 was sold to Precision National Corp., Mount Vernon, Illinois, in October 1977; rebuilt to GP21; sold to SECX 2004 in April 1979; sold to National Railway Equipment 30 March 1991, leased to Arizona & California (ARZC) 2004 in May 1991; in national lease service as NREX 2004; to Columbia & Cowlitz 700 (3rd).
3. UP 472 was sold to Precision National Corp., Mount Vernon, Illinois, in November 1978; rebuilt to GP21; sold to SECX 2006 in April 1979; sold to National Railway Equipment, 30 March 1991, leased to Arizona & California 2003 in May 1991; in national lease service as NREX 2003; to Tacoma Rail (TMBL) 2003.
4. UP 473 was sold to Precision National Corp., Mount Vernon, Illinois, 23 January 1979; rebuilt to GP21, used in national lease service as PNL 2007.
5. UP 474 was sold for scrap to Southwest Railroad Car Parts, Longview, Texas, 5 February 1988.
6. UP 475 was sold to Bargains Galore, Vancouver, Washington, in November 1980; scrapped by Joseph Simon & Sons, Tacoma, Washington, in March 1983.
7. UP 476 was sold to Bargains Galore, Vancouver, Washington, in April 1983; scrapped by Joseph Simon & Sons, Tacoma, Washington.
8. UP 477 was sold to Peaker Services, Brighton, Mich., in January 1980; scrapped during 1990.
9. UP 478 was sold to Precision National Corp., Mount Vernon, Illinois, in October 1977.
10. UP 479 was sold to Precision National Corp., Mount Vernon, Illinois, in October 1977, rebuilt to GP21; sold to SECX 2003 in March 1979, wrecked, stored at Polly, Kentucky.
11. UP 480 was sold to Precision National Corp., Mount Vernon, Illinois, 17 October 1979, rebuilt to GP21; sold to Illinois Terminal 2009, to Norfolk & Western 2009 in November 1981.
12. UP 481 was sold for scrap to Erman Corp., Turner, Kansas, in November 1983.
13. UP 482 was sold to Precision National Corp., Mount Vernon, Illinois, in October 1977, rebuilt to GP21; sold to Illinois Terminal 2008, to Norfolk & Western 2008 in November 1981. (Photo, as IT 2008, in Extra 2200 South, Issue 70, October-November-December 1979, inside back cover)
14. UP 483 was wrecked; stripped of usable parts by UP during July 1978; sold to Bargains Galore, Vancouver, Washington, in April 1979, moved direct from Omaha to Diesel Electric Service, St. Paul, Minn.; sold to Nebraska Western Technical College 483, Sidney, Nebraska; sold to Weber Industries 483, Council Bluffs, Iowa; renumbered to 438; sold to Wilson Railway Co., Des Moines, Iowa, 8 February 1989; sold to San Diego & Imperial Valley 1438; sold to Missouri & Northern Arkansas 483 in May 1993.
15. UP 484 was retired due to a generator fire; sold to Precision National Corp., Mount Vernon, Illinois, 5 January 1981.
16. UP 485 was scrapped by UP at Omaha in October 1978.
17. UP 486 was sold to Precision National Corp., Mount Vernon, Illinois, 15 June 1981.
18. UP 487 was sold for scrap to Erman Corp., Turner, Kansas, 30 August 1985.
19. UP 488 (1st) was sold to Precision National Corp., Mount Vernon, Illinois, in October 1977, rebuilt to GP21; sold to SECX 2002 in March 1979; sold to National Railway Equipment, 30 March 1991, leased to Arizona & California 2002 in May 1991; to Tacoma Belt Railroad (TMBL) 2002.
20. UP 489 was sold for scrap to Naporano Iron & Metal, Newark, N.J. in February 1980.
21. UP 490 was scrapped by UP at Omaha, Nebraska, in May 1980.
22. UP 491 was sold to Great Northern Transportation (Colorado & Eastern Railroad; COE) in February 1983; sold to Pielet Brothers Scrap Iron & Metal, McCook, Illinois, 7 August 1988; scrapped.
23. UP 492 was sold for scrap to Naporano Iron & Metal, Newark, N.J., 25 September 1980.
24. UP 493 was wrecked; held at Pocatello, Idaho, to resolve legal questions; scrapped by UP at Pocatello in August 1984.
25. UP 494 was wrecked (bent frame); sold for scrap to Erman Corp., Turner, Kansas, in October 1983.
26. UP 495 was sold for scrap to Naporano Iron & Metal, Newark, N.J. in February 1980.
27. UP 496 was sold to Bargains Galore, Vancouver, Washington, in August 1980; scrapped by Joseph Simon & Sons, Tacoma, Washington.
28. UP 497 was sold to Precision National Corp., Mount Vernon, Illinois, in November 1977, rebuilt to GP21; sold to SECX 2005 in May 1979; sold to National Railway Equipment, 30 March 1991, leased to Arizona & California in May 1991.
29. UP 498 was sold to Morrison Knudsen, 9 October 1979, rebuilt without turbocharger and different fans; sold to Kyle Railways, 28 March 1980, lettered for San Diego & Arizona Eastern 103; sold to San Joaquin Valley Railroad (Kyle) 103, to SJV 1763. (Photo, as SD&AE 103, in Extra 2200 South, Issue 70, October-November-December 1979, page 15)
30. UP 499 was sold to Precision National Corp., Mount Vernon, Illinois, in January 1979, rebuilt to GP21; sold to Agrico 2010.

General Notes:

1. Original total of 10 units, numbered WP 2001-2010; nine units to UP at merger; WP 2003 was retired by WP prior to the UP merger.
2. Assigned UP 477, 478, 479, 480, 482, 483, 485, 488, and 489; among UP's remaining GP20s in the 470-499 series.
3. WP 2001, 2002, 2004-2010 (nine units) were stored unserviceable at Salt Lake City from February 1983 to June 1986; traction motors were removed and the units moved to Ogden, Utah, stored at Ogden until WP 2004, 2005, 2006, 2007, and 2010 were sold to Precision in 1988.
4. UP returned the WP 2009 to operating condition at the Salt Lake Shops in September 1984; painted and lettered as UP 488 (2nd) at North Platte, Nebraska; retired due to turbocharger failure, removed from service on 12 January 1985.
5. WP 2006 and 2007 were still at the former Precision facility in Mount Vernon, Illinois, during June 1999.
6. Equipped with dual controls and high short hood.
7. WP 2001-2006 were built on EMD order number 5607.
8. WP 2007-2010 were built on EMD order number 7592.

Notes:

1. WP 2001 was donated to the Feather River Rail Society in June 1985, delivered on 7 July 1985.
2. WP 2002 was sold to Relco, Minooka, Illinois, 2 March 1988; short hood lowered; renumbered to RE 2001 (RLCX 2001) by 15 July 1988; leased to Exxon Chemical (later Exxon-Labarge, and ExxonMobile), Shute Creek Gasification Plant in southwestern Wyoming in September 1988; as of March 2005, still at the Shute Creek facility. (Exxon's Shute Creek plant is located about 26 miles north and east of Kemmerer, Wyoming, near where U.S. 189 meets Shute Creek Road.) (Previously, this unit was reported as being leased to the Stepan Co.; the unit in question was actually SCLX 2001, an SW1200.) (2005 update from Norm Metcalf)
3. WP 2003 was wrecked at Beowawe, Nevada, on 21 September 1963, traded to EMD on 14 September 1964.
4. WP 2004 was sold to Precision National Corp., Mount Vernon, Illinois, 2 March 1988; still at Precision during June 1994; all assets of PNC sold to National Railway Equipment in December 1997; WP 2004 still stored at NRE at Mount Vernon, Illinois, during May 2002; scrapped by NRE during 2003.
5. WP 2005 was sold to Precision National Corp., Mount Vernon, Illinois, 2 March 1988; still at Precision during June 1994; all assets of PNC sold to National Railway Equipment in December 1997; WP 2005 still stored at NRE at Mount Vernon, Illinois, during May 2002; scrapped by NRE during 2003.
6. WP 2006 was sold to Precision National Corp., Mount Vernon, Illinois, 2 March 1988; still at Precision during June 1994; all assets of PNC sold to National Railway Equipment in December 1997; WP 2006 still stored at NRE at Mount Vernon, Illinois, during May 2002; scrapped by NRE during 2003.
7. WP 2007 was sold to Precision National Corp., Mount Vernon, Illinois, 2 March 1988; still at Precision during June 1994; all assets of PNC sold to National Railway Equipment in December 1997; WP 2007 still stored at NRE at Mount Vernon, Illinois, during May 2002; scrapped by NRE during 2003.
8. WP 2008 was sold for scrap to Durbano, Ogden, Utah in November 1985.
9. UP 488 (2nd) was sold for scrap to St. Louis Auto Shredding, East St. Louis, Illinois, 12 November 1985.
10. WP 2010 was sold to Precision National Corp., Mount Vernon, Illinois, 2 March 1988; still at Precision during June 1994; all assets of PNC sold to National Railway Equipment in December 1997; WP 2010 still stored at NRE at Mount Vernon, Illinois, during May 2002; scrapped by NRE during 2003.