
Coal extraction along the Union Pacific rail corridor dominates this landscape at the edge of the Weld and Adams county line. The trio of Firestone, Frederick, and Dacono forms a tight industrial cluster, their growth driven by a series of significant mining operations such as the Shamrock Mine, Baum Mine, and Sterling Mine. This 1950 survey reveals a high concentration of schools serving these mining communities, including Mount View School, Mountain View School, and Pleasant Valley School, indicating a settled residential landscape amidst the heavy industry.
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7 editions found
1890 · East Denver
USGS Topo · 1:125,000
1899 · West Denver
USGS Topo · 1:125,000
1902 · Greeley
USGS Topo · 1:125,000
1904 · Niwot
USGS Topo · 1:62,500
1940 · Brighton
USGS Topo · 1:31,680
1940 · Eastlake
USGS Topo · 1:31,680
1940 · Lafayette
USGS Topo · 1:31,680
1944 · Lafayette
USGS Topo · 1:31,680
1944 · Brighton
USGS Topo · 1:31,680
1944 · Eastlake
USGS Topo · 1:31,680