This film was made by Universal Pictures for the Denver and Rio Grande RR. Filmed at the largest copper mine in the world. Slag cars, operating tipper, electric locos and steam. Everything that's fun to watch from 1948. Great Railroad film. Don
Great film, Don - here's a glimpse of the nickel-mining Inco electrics that used to work around Sudbury, Ontario.
The Magma Arizona Railroad hauled ore for the Magma copper company from Superior Arizona to the SP interchange at Magma Junction. The road was was dieselized in 1968.
Two of it's three steam locomotives went on to be movie stars. 2-8-0 #5 starred it the MFTV movie Powderkeg, then after being sold to the Oregon, Pacific and Eastern, Emperor of the North. #5 was also the only locomotive Magma purchased new and is now on display at he the Galveston Railroad Museum.
2-8-2 #7 starred in the Cinerama How The West Was Won, the MFTV movie The Long Summer of George Adams and a Marathon candy bar commercial. #7's now at the Texas State Railroad.
The Butte, Anaconda & Pacific was another famous copper mining railroad. I’m not sure what electric locomotives were used in the open pit mine near Butte, MT, but I do know they used their 2400 v. DC electrics to haul ore to the smelter.