Near Avery in Shoshone County, Idaho — The American West (Mountains)
Milwaukee Road Muscle
It took a lot of mechanical muscle to pull the Milwaukee Road’s long, heavy passenger and freight trains over the rugged Rocky Mountains and tough Bitterroot Range. The Milwaukee Road used a great variety of powerful locomotives to do the job. In 1923 the railroad had 2,110 steam engines. Diesel locomotives started replacing the older steam engines in 1941.
Ten years later, the Milwaukee had 232 diesels, 838 steam locomotives and 116 electric engines. The railrod ran its last steam engine in 1957. The last of the electric locomotives ended service in 1974. At the height of Milwaukee diesel ownership in 1975, the railroad had 807 diesel locomotives in service.
Horsepower & Tractive Effort
Horsepower measures a locomotive’s ability to accelerate and to pull a train. Total pulling power, however, is determined by “tractive effort” as well as “horsepower”.
“Tractive effort” is a measure of how much pulling force a locomotive can exert. The basis for measuring horsepower for steam engines varies so greatly, railroads seldom use it when comparing locomotives.
As the graph below illustrates, the Milwaukee Road’s electric locomotives provided a great boost in tractive effort over its steam engines and easily held
Location. 47° 20.491′ N, 115° 37.244′ W. Marker is near Avery, Idaho, in Shoshone County. Marker can be reached from Loop Creek Road (Federal Road 326) 4 miles west of Cliff Creek Road (Route 506). Touch for map. Located along the Route of the Hiawatha Trail. Marker is in this post office area: Avery ID 83802, United States of America.
Other nearby markers. At least 8 other markers are within walking distance of this marker. Electrified (a few steps from this marker); Johnson’s Big Cut (approx. ¼ mile away); Signs, Wires & Whistles (approx. ¼ mile away); The Traveler (approx. ¼ mile away); The Mighty Quills (approx. 0.3 miles away); Olympian Luxury (approx. half a mile away); The Olympian Hiawatha (approx. half a mile away); The Big Blowup (approx. 0.6 miles away). Touch for a list and map of all markers in Avery.
Also see . . . Route of the Hiawatha Rail Trail. (Submitted on August 5, 2011, by Bernard Fisher of Mechanicsville, Virginia.)
Categories. • Railroads & Streetcars •
Credits. This page was last revised on June 16, 2016. This page originally submitted on August 5, 2011, by Bernard Fisher of Mechanicsville, Virginia. This page has been viewed 702 times since then and 18 times this year. Photos: 1, 2. submitted on August 5, 2011, by Bernard Fisher of Mechanicsville, Virginia.