
Mining operations along the Yolo-Napa county line dominate this late 1950s survey, particularly concentrated in the northern mountains. Established sites like Reed Mine, Harrison Mine, and the Manhattan Mine are clearly marked, suggesting a landscape shaped by cinnabar or mercury extraction typical of this region's geology. The settlement of Knoxville sits at a junction along the Berryessa Knoxville Road, serving as a central hub for the remote canyon country nearby.
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3 editions found
1924 · Capay
USGS Topo · 1:62,500
1942 · St. Helena
USGS Topo · 1:62,500
1943 · Morgan Valley
USGS Topo · 1:62,500
1943 · Capay
USGS Topo · 1:62,500
1944 · Morgan Valley
USGS Topo · 1:62,500
1945 · Capay
USGS Topo · 1:62,500
1945 · Rumsey
USGS Topo · 1:62,500
1945 · St. Helena
USGS Topo · 1:62,500
1947 · Santa Rosa
USGS Topo · 1:250,000
1949 · Santa Rosa
USGS Topo · 1:250,000