Union Pacific Railroad

General Notes:

1. Original total of 140 units; part of 7874-7941 group; total of five units renumbered prior to retirement of all C30-7s on UP.
2. Total of 86 units renumbered to UP 400-531 group; all but the above four units were retired from the 400-531 group.
3. Total of 54 units remain in UP 2400-2539 group; all but the above single unit were retired from the 2400-2539 group.
4. Total of 68 units from both 400-531 and 2400-2539 number groups assigned to UP 7874-7941 series, five units renumbered.
5. Individual unit histories:

Notes:

1. UP 7883 was renumbered from UP 423 on 5 October 2000 to clear the UP 423 number for use by renumbered GP38-2 1923 (UP 423 was retired on 25 September 2000 but was still on property); renumbered again, to temporary WP number, as WP 7883 on 22 September 2003.
2. UP 7886 was renumbered from UP 2431 on 24 October 2000 to clear the UP 2431 number for use by renumbered SD60M 6276; renumbered again, to temporary WP number, as WP 7886 on 13 October 2003.

General Notes:

1. All 42 units leased from Progress Rail as a short-term lease (Peak Power) fleet during times of motive power shortage.
2. All 42 units renumbered beginning in early October 2003 from retired SD40-2 and SD40T-2 units at either VMV in Paducah, Kentucky, or Progress Rail in Somerset, Texas.
3. Units retired prior to startup of Peak Power lease, were out of service and needed repairs; after buying them, Progress Rail made the needed repairs and returned those units to operating status; units retired on same date as their renumbering were in operating condition at the time of their sale to Progress Rail.
4. Four units (UP 7876, 7877, 7905, and 7906) are SD40T-2 units; all others are standard SD40-2 units.
5. Some SD40-2 units were renumbered from UP 4000 series that were former MP units which had been in service as trailing units only, what UP calls an SD40-2B.
6. Individual unit histories:

Notes:

1. UP 7879 was rebuilt by UP to SD38-2, completed as UPY 868 on (pending as of 31 December 2005).
2. UP 7889 was rebuilt by UP to SD38-2, completed as UPY 867 on 2 December 2005 (date changed from 29 November 2005).
3. UP 7890 was renumbered to UP 3503 (2nd) on 20 November 2006.
4. UP 7891 was renumbered to WP 7891 on 6 March 2008; officially retired on 2 April 2008; used as the core unit for six-axle Genset RP20SD UPY 897, completed in late April 2008.
5. UP 7893 was renumbered to UP 3360 (2nd) on 6 February 2007.
6. UP 7894 was renumbered to UP 2740 on 22 April 2008.
7. UP 7896 was renumbered to UP 3283 (2nd) on 30 June 2006.
8. UP 7899 was renumbered from UP 3417 (2nd) on 14 November 2003; renumbered back to UP 3417 on 15 September 2006.
9. UP 7907 was retired on 25 May 2004; reactivated on 18 October 2004 for slug service; retired again on 14 September 2007. (part from Extra 2200 South, Issue 127, page 27)
10. UP 7909 was renumbered to UP 3613 (2nd) on 29 May 2007.
11. UP 7910 was renumbered to UP 2660 on 27 March 2008.
12. UP 7912 was renumbered to UP 3714 (2nd) on 7 December 2006.
13. UP 7914 was renumbered to UP 2693 on 9 April 2008.
14. UP 7916 was renumbered to WP 7916 on 6 March 2008; officially retired on 2 April 2008; used as the core unit for six-axle Genset RP20SD UPY 899, completed in late April 2008.

General Notes:

1. Original total of 140 units; part of 7874-7941 group; total of five units renumbered prior to retirement of all C30-7s on UP.
2. Total of 86 units renumbered to UP 400-531 group; all but the above four units were retired from the 400-531 group.
3. Total of 54 units remain in UP 2400-2539 group; all but the above single unit were retired from the 2400-2539 group.
4. Total of 68 units from both 400-531 and 2400-2539 number groups assigned to UP 7874-7941 series, five units renumbered.
5. Individual unit histories:

Notes:

1. UP 495 was retired on 12 October 2000 but was still on property and was renumbered to UP 7921 on 19 November 2001 to clear the UP 495 number for use by renumbered SP GP38-2 4869.
2. UP 510 was retired as UP 510 on 18 April 2000 but was still on property and was renumbered to UP 7928 on 23 June 2000 to clear the UP 510 number for use by renumbered GP38-2 2010.
3. UP 523 was retired as UP 523 on 18 April 2000 but was still on property and was renumbered to UP 7937 on 31 May 2000 to clear the UP 523 number for use by renumbered GP38-2 2023.

General Notes:

1. UP 8080, 8080B were built by Omaha Shops as UP 80, 80B; under construction for more than two years, between September 1959 and December 1961; entered road service in October 1962; operated in extensive tests on the Nebraska Division between Omaha and North Platte and Cheyenne, from October 1962 to May 1964, making its last trip on May 12, 1964.
2. UP 8080, 8080B were renumbered from UP 80, 80B in April 1964 to avoid number conflicts with newly ordered DD35s.
3. Total operating weight: 1,233,300 pounds, including 361,000 pound tender.

General Notes:

1. UP 8000-8002 were built as UP 3240-3242; converted to high speed 8000 class units in 1976; converted back to normal SD40-2s between June 1980 and May 1981.
2. UP 8003-8034 were built new as UP 3243-3274; converted to high speed 8000 class units in 1976; converted back to normal SD40-2s between June 1980 and March 1982.
3. The original order for UP 8003-8034 (EMD 73661, UP 3243-3287) included UP 3284, 3285 which were renumbered to UP 8044, 8045 in May and April 1976; both units were renumbered back to their original numbers in August 1976 after UP decided to accept the new deliveries of SD40-2s in the new 8000 class rather than to continue to renumber SD40-2s already in service.
4. UP 8035-8064 were renumbered to UP 3305-3334 between June 1980 and March 1982.
5. UP 8065-8074 were renumbered to UP 3400-3409 between June 1980 and March 1982; originally to be delivered as UP 3400-3409, but in late April 1977, UP asked EMD to deliver the units with 8000-series numbers.
6. UP 8075-8099 were renumbered to UP 3584-3608 between June 1980 and March 1982.
7. Equipped with high speed 59:18 gear ratio.