
Berkeley Pit and its adjacent mining operations dominate the southeastern landscape of this Montana quadrangle, where the industrial legacy of the Copper King era is etched into the earth. The dense grid of Butte gives way to specialized worker communities like Walkerville and Centerville, situated among a high concentration of named shafts such as the Granite Mountain Mine and Lexington Mine. This proximity between residential areas and massive extractive operations highlights the unique urban-industrial character of the Summit Valley district. North of the city, the terrain transitions into the Deerlodge National Forest, where the Continental Divide winds along the high ridges. These mountains are drained by numerous gulches, including Columbia Gulch and Harrison Creek, which flow toward the developing valley floor. Cultural and educational landmarks like Montana Tech of the University of Montana and the Museum anchor the western edge of the city, reflecting the community's evolution into a regional center for technology and history.
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1889 · Helena
USGS Topo · 1:250,000
1893 · Helena
USGS Topo · 1:250,000
1893 · Dillon
USGS Topo · 1:250,000
1899 · Boulder
USGS Topo · 1:125,000
1899 · Helena
USGS Topo · 1:250,000
1903 · Helena
USGS Topo · 1:250,000
1947 · Butte
USGS Topo · 1:250,000
1954 · Elk Park
USGS Topo · 1:62,500
1955 · Dillon
USGS Topo · 1:250,000
1957 · Dillon
USGS Topo · 1:250,000