Union Pacific Railroad
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Roster of Diesel and Turbine Locomotives, 1934-2009
This page was last updated on July 28, 2022.
(Return to UP Diesel Roster Index Page)
Following is a listing of Union Pacific's misecllaneous locomotives, including a GE 44-ton switcher, two electric locomotives on the LA&SL, and several locomotives used in UP's tie plants in Laramie, Wyoming and The Dalles, Oregon.
GE 44-ton Switcher
UP's GE 44-ton locomotive was delivered as D.S. 1399; renumbered to 03999 in 1956; renumbered to 903999 in 1959; retired in June 1974.
GE 44 ton -- 1 unit
380 horsepower; B-B trucks; 88,600 pounds operating weight
| Road Number |
First Number |
Second Number |
Third Number |
Builder Date |
Builder Number |
Date Retired |
| UP 903999 | GE 1399 | UP 1399 | UP 03999 | Feb 1947 | 28344 | Jun 1974 |
Built as GE demonstrator 1399, delivered to Union Pacific on 28 March 1947; sold to UP on 8 May 1947; first assigned to yard switching duties in the Omaha area, then as shop switcher for Omaha Shops; transferred to the System Roadway (maintenance of way) department, moved to Pocatello, Idaho and renumbered to UP 03999 in October 1956; moved to Omaha for a complete rebuild in late 1972, completed in February 1973; used as Omaha shop switcher until retirement in 1974.
Sold to Diesel Supply Co., in June 1974; sold to General Dynamics, Electric Boat Division, Groton, Connecticut in August 1974, shipped from Omaha on August 19, 1974; named "Diane" while at General Dynamics; donated to Danbury Railroad Museum, Danbury, Connecticut in about July 2006.
LA&SL Electric Locomotives
LA&SL purchased Glendale & Montrose (and both locomotives) in May 1931 after G&M was abandoned on December 30, 1930.
Electric service over former G&M tracks was discontinued in 1940; the Glendale Branch was dieselized in July 1942 in one of the earliest uses of diesel switch locomotives on UP in California.
LA&SL E-100
Baldwin-Westinghouse 50 ton Electric -- 1 unit
400 horsepower; B-B trucks; 95,000 pounds operating weight
| Road Number |
First Number |
Date To UP |
Builder | Date Built |
Builder Number |
Date Retired |
| LA&SL E-100 | G&M 22 | May 1931 | Baldwin-Westinghouse | Aug 1923 | 56397 | Mar 1942 |
LA&SL E-100 was a Baldwin-Westinghouse Class B-1, equipped with 36-inch wheels; 60:17 gear ratio, and four Westinghouse Model 562-D5, 100 horsepower traction motors. LA&SL E-100 had Baldwin-Westinghouse order number 23577.
LA&SL E-100 was built new as Glendale & Montrose Railway 22 in 1923; numbered as LA&SL E-100 in May 1931, for use on former G&M tracks between Delay Drive Siding and Glendale.
LA&SL E-100 was sold to UP-owned Yakima Valley Transportation Company 297, Yakima, Washington in March 1942, delivered to Yakima in September 1942; donated to Orange Empire Railway Museum, Perris, California in November 1985.
Reference: Signor, John. The Los Angeles and Salt Lake Railroad Company, Union Pacific's Historic Salt Lake Route, pages 107, 114.
LA&SL E-101
PE-Built 35 ton Electric -- 1 unit
300 horsepower; B-B trucks; 70,000 pounds operating weight
| Road Number |
Previous Number |
Date To UP |
Builder | Date Built |
Date Vacated |
Notes |
| (LA&SL E-101) | G&M 21 | May 1931 | Pacific Electric, Los Angeles | 1903 | Sep 1936 | 1 |
G&M 21 (LA&SL E-101) was equipped with 33-inch wheels and four Westinghouse Model 76, 75-horsepower traction motors.
G&M 21 (LA&SL E-101) was built as unmotored Pacific Electric flat car 3072; rebuilt in 1903 by Pacific Electric shops to motorized work motor 38; renumbered PE 1537 in 1911; sold March 1916 to Glendale & Montrose 21 in March 1916; changed by G&M from work flat to enclosed box motor.
G&M 21 was assigned LA&SL number E-101 but not renumbered; it was seldom used; by 1934 the locomotive was boarded up and out of service, stored in the former G&M yard in Glendale, California.
LA&SL E-101 was sold for scrap in September 1936 to Pennsylvania Iron & Steel Company, Los Angeles, California (some sources indicate that the former G&M 21 was burned by Pacific Electric at their Torrance Shops).
Tie Plant Locomotives
Roadway Locomotives -- 9 units (narrow gauge)
Two-axle, four-wheel
| Road Number |
First Number |
Type | Weight | Builder | Builder Model |
Builder Date |
Builder Number |
Date Retired |
Notes |
| UP-1 | G-M | 12 ton | Vulcan | Dec 1922 | 3273 | 1950 | 1 | ||
| UP-2 | G-M | 12 ton | Vulcan | Dec 1922 | 3274 | 1936 | 2 | ||
| UP-3 | G-M | 12 ton | Whitcomb | WHL | May 1929 | 12889 | 1950 | 3 | |
| UP-4 | D-M | 12 ton | Davenport | D-12 | May 1931 | 2190 | 1938 | 4 | |
| UP-5 | G-M | 20 ton | Whitcomb | 20GM-4 | Oct 1936 | 13150 | 5 | ||
| MW-1 | MW-6 | D-M | 25 ton | Whitcomb | 25DM-42A | Jun 1950 | 40693 | 6 | |
| MW-2 | MW-8 | D-E | 25 ton | GE | Jun 1967 | 35916 | 7 | ||
| MW-3 | UP-5 | G-M | 20 ton | Whitcomb | 20GM-4 | Oct 1936 | 13150 | 1968 | 8 |
| MW-4 | D-M | 24 ton | Whitcomb | 20GM-9 | Oct 1937 | 13162 | 9 | ||
| MW-6 | D-M | 25 ton | Whitcomb | 25DM-42A | Jun 1950 | 40693 | 10 | ||
| MW-7 | D-M | 25 ton | Whitcomb | 25DM-42A | Jun 1950 | 40694 | 11 | ||
| MW-8 | D-E | 25 ton | GE | Jun 1967 | 35916 | 12 |
(Read more about UP's Tie Plants)
General Notes:
- G-M denotes Gas-Mechanical; D-M denotes Diesel-Mechanical; D-E denotes Diesel-Electric.
- Union Pacific used the term Roadway Service for all of its maintenance of way equipment and activities.
- UP-1 to UP-5 and MW-1 to MW-8 were 29-1/2 inch gauge and were used at UP's tie plants in Laramie, Wyoming and The Dalles, Oregon.
Notes:
- UP-1 was retired in 1950 under Work Order 6114; UP records show replaced by MW-1.
- UP-2 was retired in 1936 under Work Order 1278.
- UP-3 had 97 horsepower; retired in 1950 under Work Order 7947; UP records show replaced by MW-7.
- UP-4 was retired in 1938 under Work Order 5788; UP records show replaced by MW-4.
- UP-5 renumbered to MW-3.
- MW-1 had 190 horsepower; renumbered from MW-6; still in service during November 1978.
- MW-2 was renumbered from MW-8; still in service during November 1978; sold to Kerr McGee, number KM-2D.
- MW-3 renumbered from UP-5; retired 1968 under Work Order 31009.
- MW-4 had 147 horsepower; was still in service during November 1978.
- MW-6 had 190 horsepower; renumbered to MW-1.
- MW-7 had 190 horsepower; still in service, November 1978; sold to Kerr McGee, number KM-1D.
- MW-8 renumbered to MW-2.
North Platte Shop Switcher
UP's North Platte shop switcher did not have a road number. It was a diesel-mechanical (D-M) locomotive with 140 horsepower, and was purchased second-hand from Boeing Aircraft Company in 1971; used briefly as shop switcher at North Platte; transferred to Roadway (MOW) equipment shop in Pocatello, Idaho; removed from service in 1976; retired on 24 February 1978 and sold.
Roadway Locomotive -- 1 unit
Two-axle, four-wheel
| Road Number |
Previous Number |
Date To UP |
Type | Weight | Builder | Builder Model |
Builder Date |
Builder Number |
Date Retired |
| (no number) | Boeing B-30 | Nov 1971 | D-M | 30 ton | Whitcomb | 30DM35A | Sep 1944 | 40288 | 24 Feb 1978 |
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