The Milwaukee Road’s six hundred fifty-seven mile electrified railroad ended at 11:40 PM June 15, 1974, when Engineer Art Morang stopped the E57B and E34C on the Harlowton roundhouse track. They were the last operating locomotive of the original eighty-four locomotives built by General Electric in 1915. The electric locomotive roster had totaled one hundred sixteen locomotives of five different types, operating from Harlowton, MT four hundred forty miles to Avery, Idaho, and two hundred sixteen miles from Othello, Wash. to Tacoma, Wash., over five mountain ranges. The E57B was fifty-seven feet eight and three-quarters inches long, sixteen feet eight inches high, ten feet wide, and weighed one hundred forty-four tons. Rated at one thousand five hundred h.p., it could develop two thousand three hundred ninety-five h.p. starting effort, a sixty-two percent overload. Operating in one- to four-unit consists, these locomotives were very trouble free. Their three thousand volt D.C. trolley restricted them to a small portion of the eleven thousand two hundred forty-eight mile railroad, and they were replaced by the more versatile diesel electric locomotives.