Union Pacific Railroad

General Notes:

1. Original total of 20 SP units, numbered SP 7940-7959; 19 units went to UP at merger; SP retired 7957 prior to the merger.
2. Of 19 units that went to UP at merger, 14 units are assigned 1427-1440; and these five units are assigned these numbers.
3. Equipped to operate with former SP road slugs.
4. Entire five-unit group assigned UP 5353-5357 in September 1997, one unit (5353) renumbered; assigned UP 1453-1457 in December 1999.

Notes:

1. UP 1453, as UP 5353 (ex SP 7941) was the only unit in this group to be repainted to the UP 5353-5357 group, completed on 5 January 1998.

General Notes:

1. Original total of eight SSW units, numbered SSW 7960-7967; seven units went to UP at merger; SP retired SSW 7967 prior to the merger.
2. Of the total of seven units that went to UP at merger, these three units are assigned these numbers; the other four units are assigned UP 1441-1444.
3. Built as SSW GP40s; rebuilt by SP to GP40-2 standards in 1981 and 1982.
4. Equipped to operate with former SP road slugs.
5. SP's model designation was GP40R; UP uses GP40-2.
6. Assigned UP 5358-5360 in September 1997, no units renumbered; assigned UP 1458-1460 in December 1999.
7. Built on EMD order number 7860.

Notes:

1. UP 1458 (along with UP GP40-2 1385) was wrecked on 15 September 2005 at Shepard, Texas; scrapped at wreck site; for recordkeeping purposes in UP's computer system, the UP 1458 number was changed to WP 1458 on 15 December 2005.

General Notes:

1. Total of 15 WP units went to UP at merger, numbered WP 3545-3559; renumbered to UP 900-914 in February 1984 to November 1988; six units (UP 900-905) were converted to road slug control units and renumbered to UP 3002-3007 in December 1990 to February 1991.
2. Entire 15-unit group assigned UP 900-905 and 906-914 in December 1983; six units (UP 900-905) converted to road slug control units and renumbered UP 3002-3007 beginning in December 1990, leaving nine units in group.
3. Remaining nine-unit group (UP 906-914) assigned UP 2908-2916 in June 1995, two units (UP 2911 and 2915) renumbered; assigned UP 561-569 in July 1996, one unit (UP 568, above) renumbered; assigned UP 5315-5323 in March 1997, one unit (UP 5318) renumbered; assigned UP 5361-5369 in September 1997, one unit (UP 5368) renumbered; assigned UP 1461-1469 in December 1999, one unit (UP 1461) renumbered; assigned UP 9986-9994 in August 2001.

General Notes:

1. Total of 65 SP/SSW units (20 for SSW and 45 for SP) went to UP at merger, numbered SP 7100-7138, SSW 7274-7293, and SP 7294-7299.
2. Built as standard GP40s in the period May 1966 through December 1971 for the owners shown in the "First Number" column, below; all were remanufactured as GP40M-2s in November 1990 through June 1991 by Morrison Knudsen at their shops in Boise, Idaho, and Mountaintop, Pa.
3. All 65 units were rebuilt by MK with PTC (Positive Traction Control) wheel-slip control system, along with SP-standard features such as roof-mounted beacon lights, air conditioning, ditch lights, snowplow, and improvements to the cab interiors, along with having dynamic braking added to nine units (eight former MKT units and one former Rock Island unit) not originally equipped with the feature.
4. Assigned UP 5370-5434 in September 1997, one unit (UP 5371) renumbered; assigned UP 1470-1534 in December 1999.
5. Individual unit histories:

Notes:

1. UP 1471, as UP 5371 (ex SP 7101) was the only unit is this group to be repainted and renumbered to the UP 5370-5434 group, completed on 8 September 1997.
2. UP 1477, as SP 7107, was the first SP unit to wear the original, small version of the SP speed lettering paint scheme, completed on 17 March 1991; UP 5382, as SP 7112, was the first SP unit to carry the later, large version of the SP speed lettering scheme, completed on 15 April 1991 (new SP GP60s 9715-9769 were delivered in April through July 1991, the first new units to be delivered with large speed lettering).
3. UP 1502 was renumbered from SP 7124 while under loan to AAR at their test track near Pueblo, Colorado.
4. SSW 7283 (assigned UP 1518) was renumbered instead to UP 1338. Yet another example of the silliness of the renumbering plan.
5. UP 1529 is ex SP 7294 (2nd). SP 7294 (1st) was ex CSX 6707; completed by Morrison Knudsen on 25 February 1991. SP 7294 (1st) was wrecked in June 1991 at Proctor, Arkansas, and returned to MK; components were used on the frame of CSX 6811 to build SP 7294 (2nd), completed on 7 February 1992; for photographic comparison, SP 7294 (1st) had standard SP railroad roman lettering and SP 7294 (2nd) had large SP speed lettering.

General Notes:

1. This group of six units were part of a total of 15 WP units went to UP at merger, numbered WP 3545-3559; renumbered to UP 900-905 in February 1984 through November 1988; renumbered to UP 3002-3007 and converted to operate as road slug control units in December 1990 to February 1991.
2. Equipped as road slug control units to operate with road slugs UPY 927-929 (ex UP S301-S303) in local and heavy switching service.
3. Converted to road slug control units by Morrison Knudsen at Boise, Idaho, and operated in the Hinkle, Oregon, area (as both 900 and 3000 series units) pending completion of all six GP40-2 road slug control units and the three road slugs; the road slugs were completed on 29 September 1990; the three 12-motor slug sets (GP40-2/slug/GP40-2) were placed in service in April 1991.
4. All six GP40-2s were numbered from their 3000-series numbers to their new 1500-series numbers at the same time as their assigned road slugs were renumbered from their S300-series numbers, to their UPY numbers; these six units were assigned to the comparably equipped road slugs as follows: UP 1535/UPY 929/UP 1536; UP 1537/UPY 927/UP 1538; UP 1539/UPY 928/UP 1540.
5. During 2005, all three slug sets were assigned to the former MP Corbyn Yard at New Braunfels, Texas, northeast of San Antonio.
6. Above six units, as part of original 15-unit group, assigned UP 900-905 and 906-914 in December 1983; six units (UP 900-905) converted to road slug control units and renumbered UP 3002-3007 beginning in December 1990; assigned UP 1535-1540 in December 1999.
7. Individual unit histories: