1st hint: This railway was incorporated in 1892, it electrified in 1913 and finally dieselized in 1967.
Anaconda, MT, between W. Pennsylvania St. and W. Park Ave., where W. Park Ave., aka MT Hwy 1, splits with W. Commercial Ave. 46*07'56"N, 112*57'52"W I didn't realize it was so desolate in that area. I was looking in the NM/AZ area until your BA&P hint.