Milwaukee Road class ES-1

The Milwaukee Road's class ES-1 comprised a single electric switcher locomotive built in 1915. It was designed to run on the unique 1,500 V DC electrification in the yard at Great Falls, Montana. It was originally numbered #10000 and was numbered E85 in March 1939. It was retired in November 1939.

Milwaukee Road class ES-1
Type and origin
Power typeElectric
BuilderGeneral Electric
Serial number4986
Build dateApril 1915
Total produced1
Specifications
Configuration:
​
 • AARB-B
 • UICBo′Bo′
Gauge4 ft 8+1⁄2 in (1,435 mm) standard gauge
Loco weight98,900 lb (44,900 kg; 44.9 t)
Electric system/s1,500 V DC
Performance figures
Power output316 hp (236 kW) continuous
Career
OperatorsMilwaukee Road
ClassES-1
Numbers
  • 10000
  • E85 from March 1939
RetiredNovember 1939

References
  • Edson, William D. (Spring 1977). "Milwaukee Road Locomotives". Railroad History. Boston, Mass.: Railway and Locomotive Historical Society. 136 (136): 115. JSTOR 43523968.
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