Union Pacific Railroad

General Notes:

1. Total of 14 MP units went to UP at merger, numbered MP 3202-3215.
2. Of the original 14 units, six units (MP 3204, 3206, 3211, 3212, 3213, 3215) were repainted to UP yellow and gray, with Missouri Pacific lettering, in May through September 1985; relettered to UP in March 1986 through September 1988.
3. Beginning in January 1986, all 14 units were assigned to switching service in system hump yards; during early 1998, UP 4202, 4203, 4206, 4207, and 4208 were assigned to hump service at Livonia, La, replacing MP15s.
4. Reflecting the uncertain nature of the MP-to-UP renumbering plan during late 1985 through early 1986, seven units (UP 4202-4205 and 4207-4209) carried UP numbers 4162-4165 and 4167-4169 from January 1986 until April 1986 (MP 3206 was renumbered direct to UP 4206).
5. Renumbered to UP 4202-4215 in February 1986 through September 1988 (UP 4213, ex MP 3213, was the first, completed on 20 February 1986; UP 4211, ex MP 3211, was the last, completed on 1 September 1988).
6. Not equipped with dynamic braking.
7. UP 4205 and B4207 to be renumbered to UP 8943 and 8944, as part of UP 8927-8999 group; other 12 units to be renumbered as part of UP 9882-9950 group.
8. Individual unit histories:

Notes:

1. UP 4205 operated in trailing-unit-only status (by removal of refrigerator, toilet, and cab seats) as UP B4205 from 1 December 1992 to 7 October 1997.
2. UP 4207 was changed to trailing unit-only status (by removal of refrigerator, toilet, and cab seats) and renumbered to UP B4207 on 11 September 1992.
3. UP 4211 was wrecked on 22 June 1997 at Devine, Texas; sold for scrap to Smith & Chambers, 30 October 1998.

General Notes:

1. Total of 106 MP units went to UP at merger, numbered MP 3216-3321.
2. Of the original 106 units, 26 units (MP 3226, 3228, 3238, 3239, 3241, 3245, 3246, 3258, 3259, 3265, 3267, 3269, 3270, 3280, 3286, 3289, 3291, 3294, 3297, 3298, 3304, 3306, 3309, 3310, 3311, 3319) were repainted to UP yellow and gray, with Missouri Pacific lettering, in May 1984 through November 1985; relettered to UP in August 1986 through September 1993.
3. A total of 70 units were changed to trailing-unit-only status by removal of refrigerators, toilets, and cab seats, and renumbered with "B" number in April through December 1992; B4273 was renumbered back to UP 4273 on 4 June 1998.
4. Renumbered and repainted to UP 4216-4321 in February 1986 through September1993 (UP 4234, ex MP 3234, was the first, completed on 12 February 1986; UP 4270, ex MP 3270, was the last, completed on 14 September 1993).
5. UP 4291, as MP 3291, was the first unit to be repainted to Missouri Pacific yellow, completed on 14 May 1984.
6. UP 4270, as MP 3270, was the last unit to be painted Missouri Pacific blue, completed in late March 1984; repainted to MP yellow in November 1985.
7. Although not officially retired by UP after being converted to SD38-2s, those units that have been converted are shown above with the rebuild date as their retirement date.
8. Not equipped with dynamic braking.
9. Renumbered to UP 8945-8999 (B-numbered units) and UP 9921-9950.
10. Individual unit histories:

Notes:

1. UP B4216 was retired and renumbered to UP 7898 (Peak Power) on 19 December 2003.
2. UP B4218 was rebuilt by UP to SD38-2 2816, completed on 18 August 1997.
3. UP B4219 was rebuilt by UP to UPY SD38-2 847, completed on 17 December 1999.
4. UP B4222 was sold to Larrys Truck Electric (date?); moved to LTE's facility in McDonald, Ohio; scrapped by LTE in May 2007.
5. UP B4227 was rebuilt by UP to SD38-2 2819, completed on 22 July 1997.
6. UP 4238 (also as UP 9927) was one of three units (UP 3626 and 3798 were the other two units) that carried the Operation Redblock substance abuse prevention slogan; UP 4238 was completed on 21 November 1988.
7. UP B4240 was rebuilt by UP to SD38-2 2837, completed on 18 January 1999.
8. UP B4241 was assigned UP 8959; retired in March 2000 and the UP 8959 number was used by UP B4250 in September 2000, which should have been renumbered to UP 8962.
9. UP B4242 was rebuilt by UP to SD38-2 2836, completed on 28 August 1998.
10. UP B4244 (assigned UP 8960) was rebuilt by UP to UPY SD38-2 848, completed on 28 August 2000.
11. UP 4245 was rebuilt by UP to SD38-2 2821, completed on 4 September 1997.
12. UP B4247 (assigned UP 8961) was rebuilt by UP to UPY SD38-2 849, completed on 31 August 2000.
13. UP B4249 was rebuilt by UP to SD38-2 2822, completed on 12 September 1997.
14. UP B4251 (assigned UP 8963) was retired on 29 March 2000; reinstated on 1 May 2000; rebuilt by UP to UPY SD38-2 855, completed on 26 May 2000.
15. UP B4252 was rebuilt by UP to SD38-2 2838, completed on 22 February 1999.
16. UP 4253 was rebuilt by UP to SD38-2 2846, completed on 8 October 1999.
17. UP B4255 was rebuilt by UP to SD38-2 2839, completed on 5 June 1999.
18. UP B4257 was rebuilt by UP to SD38-2 2840, completed on 5 March 1999.
19. UP 4261 was rebuilt by UP to SD38-2 2828, completed on 22 April 1998.
20. UP B4266 was rebuilt by UP to SD38-2 2818, completed on 22 July 1997.
21. UP B4267 (assigned UP 8970) was rebuilt by UP to UPY SD38-2 851, completed on 23 March 2000.
22. UP 4269 was rebuilt by UP to SD38-2 2829, completed on 15 July 1998.
23. UP 4271 was retired and renumbered to UP 7900 (Peak Power) on 15 December 2003.
24. UP 4273 was retired on 18 April 2000; still on property and renumbered to UP 8974 on 28 November 2000.
25. UP B4275 was rebuilt by UP to SD38-2 2841, completed on 3 February 1999.
26. UP 4276 was rebuilt by UP to SD38-2 2817, completed on 8 July 1997.
27. UP B4283 was rebuilt by UP to SD38-2 2843, completed on 16 April 1999.
28. UP B4284 was rebuilt by UP to SD38-2 2844, completed on 13 October 1999.
29. UP B4288 was rebuilt by UP to SD38-2 2826, completed on 21 April 1998.
30. UP B4298, retired in August 2001, was seen on 24 July 2007 lettered as RPRX 4298, supposedly headed for Toronto and conversion to Railpower RP20SD UPY 896; completed as RailPower RPBDB20 in December 2007, released in early March 2008.
31. UP B4300 (assigned UP 8989) was rebuilt by UP to UPY SD38-2 852, completed on 22 March 2000.
32. UP 4302 was rebuilt by UP to SD38-2 2842, completed on 31 March 1999.
33. UP 4307 (assigned UP 9943) was rebuilt by UP to UPY SD38-2 857, completed on 23 October 2000.
34. UP B4310 was rebuilt by UP to SD38-2 2845, completed on 28 June 1999.
35. UP B4313 was retired and renumbered to UP 7889 (Peak Power) on 21 November 2003.
36. UP 4319 (assigned UP 9949) was rebuilt by UP to UPY SD38-2 853, completed on 22 February 2000.