
Mt St Helena dominates the northern reaches of this Napa Valley landscape, overlooking a region defined by early mining interests and agrarian estates in the mid-1920s. The presence of the Chicago and Helena Quicksilver Mines, along with the Oat Hill Mine and Coronado Mine, highlights a period when mercury extraction was a significant industrial driver in the rugged hills surrounding Calistoga.
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2 editions found
1902 · Napa
USGS Topo · 1:125,000
1916 · Santa Rosa
USGS Topo · 1:62,500
1920 · Healdsburg
USGS Topo · 1:62,500
1921 · Kelseyville
USGS Topo · 1:62,500
1933 · Healdsburg
USGS Topo · 1:48,000
1935 · Sebastopol
USGS Topo · 1:48,000
1940 · Healdsburg
USGS Topo · 1:62,500
1942 · Sebastopol
USGS Topo · 1:62,500
1942 · Sonoma
USGS Topo · 1:62,500
1942 · St. Helena
USGS Topo · 1:62,500