UNION PACIFIC RAILROAD
Roster of Former Southern Pacific Locomotives
(including Cotton Belt/SSW and D&RGW)
As of September 1996
Compiled by Don Strack
September 1996 Total: 2,394 units
Total SP: 2,196 (2,210 including 14 slug units)
Total D&RGW: 184
Ownership of all D&RGW equipment, including its locomotives, was transferred to UP ownership on 1 June 1997.
| SP Number | Model | Qty. | UP Number |
| SP 100-378 | AC4400CW | 277 | UP 6380-6549, 6888-6994 (later UP 6148-6420) |
| SP 1010, 1012, 1013 | Yard Slug | 3 | UP S1-S3 |
| SP 1503-1540 | SD7 | 14 | (not assigned UP numbers) |
| SP 1600-1613 | Road Slug | 11 | UP S310-S320 |
| SSW 2251, 2257, SP 2277, SSW 2293 | SW1200 | 4 | (not assigned UP numbers) |
| SP/SSW 2451-2689 | SW1500 | 174 | UP 1060-1233 |
| SP 2690-2701 | MP15DC | 9 | UP 1291-1299 |
| SP 2702-2759 | MP15AC | 57 | UP 1431-1487 |
| SP 2957, 2961-2970 | SD35R | 11 | (not assigned UP numbers) |
| SP 2971-2976 | SD38-2 | 6 | UP 2830-2835 |
| SP 3194-3883 | GP9 | 11 | (not assigned UP numbers) |
| SP 4160, SSW 4201, 4203 | GP35R | 3 | (not assigned UP numbers) |
| SP 4313-4450 | SD9 | 12 | (not assigned UP numbers) |
| SP 4800-4844 | GP38-2 | 44 | UP 2064-2107 |
| SP 4845-4873 | GP38-2 | 28 | UP 1971-1998 |
| SP 5100-5114 | B23-7 | 14 | UP 185-198 |
| SP 5298, 5318 | SD39 | 2 | UP 2850, 2851 (not renumbered) |
| SP 6307-6359 | GP35R | 13 | (not assigned UP numbers) |
| SP 6793-6892 | SD45T-2R | 98 | UP 4929-4986, 4999 |
| SP 7100-7134 | GP40M-2 | 39 | UP 5370-5390 and 5399-5416 |
| SP 7231 | GP40X | 1 | UP 5506; not renumbered, see UP 9999 |
| SP 7240-7273 | GP40-2 | UP 5210-5241, later assigned UP 1310-1341, not renumbered | |
| SSW 7274-7294, SP 7295-7299 | GP40M-2 | 26 | UP 5391-5398 and 5417-5434; not renumbered, see UP 1491-1498 and 1517-1534 |
| SP 7300-7385 | SD40R | 83 | (not assigned UP numbers) |
| SP 7399 | SD40R | 1 | (not assigned a UP number) |
| SP 7400-7560 | SD45R | 143 | (not assigned UP numbers) |
| SP 7600-7602 | GP40P-2 | 3 | UP 5200, 5273, 7274; not renumbered, see UP 1300, 1373, 1375 |
| SP 7608-7677 | GP40-2 | Assigned UP 5201-5209, 5275-5326; not renumbered, see UP 1301-1309, 1374-1426, and 1449-1452 | |
| SP/SSW 7754-7770 | B36-7 | 16 | UP 384-399 |
| SP/SSW 7774-7883 | B30-7 | 102 | UP 260-335 |
| SP 7940-7959 | GP40-2 | UP 5327-5340 | |
| SP/SSW 7960-7966 | GP40-2 (GP40R) | 7 | Assigned UP 5341-5344 and 5358-5360; not renumbered, see UP 1441-1444 and 1458-1460 |
| SP 8000-8039 | B39-8 | 40 | UP 5609-5648 |
| SP 8040-8093 | B40-8 | 51 | UP 5649-5699 |
| SP 8100-8200 | C44-9CW | 101 | UP 9564-9664 |
| SP 8574-8706 | SD40M-2 | 133 | UP 4600-4732 |
| SP 8230-8391, 8489-8573 | SD40T-2 | 231 | UP 4369-4599 |
| SP/SSW 9189-9404 | SD45T-2 | 110 | UP 4832-4928, 4987-4998 |
| SP/SSW 9600-9794 | GP60 | 191 | UP 5703-5893 |
| SP 9800-9824 | SD70M | 25 | UP 9900-9924; not renumbered, see UP 3974-3999 |
D&RGW Units
| D&RGW Number | Model | Qty. | UP Number |
| D&RGW 133, 134, 139 | SW1200 | 3 | (not assigned UP numbers) |
| D&RGW 141, 142, 144 | SW1000 | 3 | (not assigned UP numbers) |
| D&RGW 3002-3015 | GP30 | 6 | (not assigned UP numbers) |
| D&RGW 3051-3068 | GP40 | 7 | (not assigned UP numbers) |
| D&RGW 3060-3080 | GP40 | 9 | UP 718-726 |
| D&RGW 3081-3093 | GP40 | 8 | UP 738-745 |
| D&RGW 3094-3130 | GP40-2 | 35 | UP 5242-5272, 5345-5348 |
| D&RGW 3131-3153 | GP40 | 13 | UP 727-737 |
| D&RGW 3154-3156 | GP60 | 3 | UP 5700-5702 |
| D&RGW 5341-5413 | SD40T-2 | 69 | UP 4000-4068 |
| D&RGW 5322-5340 | SD45 | 10 | (not assigned UP numbers) |
| D&RGW 5501-5517 | SD50 | 17 | UP 5095-5111 |
| D&RGW 5763 | F9B | 1 | (not assigned a UP number) |
By the time of the UP-SP merger, SP had repainted 23 units from their original D&RGW paint scheme to SP's newer "Speed Lettering" paint scheme. The first was ex D&RGW 3086, completed in July 1992. Although all were still D&RGW units, UP considered all 23 units to be SP locomotives. Included were:
- Three GP40s: D&RGW 3059, 3086, and 3138.
- Thirteen SD40T-2s: D&RGW 5350, 5351, 5352, 5368, 5378, 5380, 5387, 5388, 5393, 5394, 5397, 5399, 5412; ownership was transferred to SP at the same time.
- Seven SD50s: D&RGW 5504, 5510, 5511, 5513, 5514, 5516, and 5517.
