Union Pacific Railroad

Southern Pacific Locomotives

(including Cotton Belt/SSW and D&RGW)

(Return to Union Pacific Diesel Index Page)

As of September 1996

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.

(By July 2016, there was only one former SP AC4400CW still in SP paint. That ended on July 29, 2016 when SP 343 was repainted as UP 6308. Scott Thomas wrote on Trainorders.com, "It was the last locomotive working on the UP with SP reporting marks. Currently it is still in the Jenks Shop at North Little Rock, AR, but it should be back out on the road within a few weeks wearing a new coat of Armour Yellow. There are around 100 ex-SP locomotives still on the UP roster that have avoided UP paint thus far with only a patch renumbering. The numbers of the "patches" have been dropping fast lately, with a long overdue repainting push by the UP currently in progress. In the end, it has taken a little short of 20 years for the last SP lettered locomotive to become a UP lettered locomotive.")

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 5322-5340 SD45 10 (not assigned UP numbers)
D&RGW 5341-5413 SD40T-2 69 UP 4000-4068
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: