Milwaukee Road class ES-1

Power typeElectric

Power typeElectric

BuilderGeneral Electric

Serial number4986

Milwaukee Road class ES-1
Type and origin Power type Electric Builder General Electric Serial number 4986 Build date April 1915 Total produced 1
Specifications Configuration: ​  • AAR B-B  • UIC Bo′Bo′ Gauge 4 ft 8+1⁄2 in (1,435 mm) standard gauge Loco weight 98,900 lb (44,900 kg; 44.9 t) Electric system/s 1,500 V DC
Performance figures Power output 316 hp (236 kW) continuous
Career Operators Milwaukee Road Class ES-1 Numbers 10000 E85 from March 1939 Retired November 1939

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.