Plat Map of Milwaukee Road facilities at Butte, Montana, August 31, 1929, Sheet Number 1, Line Segment 714, showing the Butte yard, mainline, depot, Butte, Anaconda and Pacific Railway yard.

Plat Map of Milwaukee Road facilities at Butte, Montana, February 25, 1916, Sheet Number 1, Line Segment 714, showing the Butte yard, mainline, Northern Pacific interchange.

Plat Map of Milwaukee Road facilities at Butte, Montana, February 25, 1916, Sheet Number 1, Line Segment 714, showing the Butte yard, mainline, Milwaukee Road-Northern Pacific joint industry, stockyardÿspurs.

Plat Map of Milwaukee Road facilities at Butte, Montana, February 25, 1916, Sheet Number 2, Line Segment 714, showing the Butte yard, mainline, Colorado Junction, Butte, Anaconda and Pacific Railway, Northern Pacific interchanges.

Plat Map of Milwaukee Road facilities at Butte, Montana, February 25, 1916, Sheet Number 2, Line Segment 714, showing the Mainline.

Plat Map of Great Northern facilities at Butte, Montana, February 1, 1915, Drawing Number 86971-8, Sheet Number 2, Line Segment 336, showing the Great Falls-Butte line, former right of way, Montana Union RR, industry spurs.

Plat Map of Great Northern facilities at Butte, Montana, February 1, 1915, Drawing Number 86971-8, Sheet Number 1, Line Segment 336, showing the Great Falls-Butte line, Anaconda trackage.

Plat Map of Great Northern facilities at Butte, Montana, September 1, 1933, Drawing Number 56971, Sheet Number 1/Index, Line Segment 336, showing the Great Falls-Butte line, Butte and vicinity.

Northern Pacific steam locomotive 4501 at Butte, Montana, on August 19, 1949. Number 4501 is a class Z-4 built by Alco-Richmond in 1923. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, roster photo

Northern Pacific steam locomotive 4501 at Butte, Montana, on August 19, 1949. Number 4501 is a class Z-4 built by Alco-Richmond in 1923. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, roster photo