Butte, Anaconda and Pacific Railroad electric locomotive 46 at Rocker, Montana in 1964. Photograph by Alden Raney. Other subject classes: Locomotive-Electric.

Butte, Anaconda and Pacific Railway type GP7 101 at Rocker, Montana in 1964. Photograph by Alden Raney. Other subject classes: Locomotive-Diesel.

Butte, Anaconda and Pacific Railway type GP7's 102 and 101 at Rocker, Montana in 1964. Photograph by Alden Raney. Other subject classes: Locomotive-Diesel.

Butte, Anaconda and Pacific Railway type GP9's 106 and 107 at Rocker, Montana in 1964. Photograph by Alden Raney. Other subject classes: Locomotive-Diesel.

Butte, Anaconda and Pacific Railway type GP9's 107 and 106 at Rocker, Montana in 1964. Photograph by Alden Raney. Other subject classes: Locomotive-Diesel.