
Gopher Ridge divides the landscape where the foothills meet the valley floor in the early 1960s. To the west, the Calaveras River winds past the historic settlement of Jenny Lind and the Plymouth Rock Mine, where extensive Tailings deposits reveal the area's gold-mining legacy. This survey captures a significant moment in California water management, showing areas slated for inundation by the New Hogan Reservoir and the established Salt Spring Valley Reservoir to the east.
39 named features on this map. Tap any name to fly to it.
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3 editions found
1889 · Jackson
USGS Topo · 1:125,000
1892 · Jackson
USGS Topo · 1:125,000
1897 · Jackson
USGS Topo · 1:125,000
1902 · Jackson
USGS Topo · 1:125,000
1915 · Trigo
USGS Topo · 1:31,680
1916 · Bachelor Valley
USGS Topo · 1:31,680
1916 · Copperopolis
USGS Topo · 1:62,500
1942 · Farmington
USGS Topo · 1:62,500
1942 · Copperopolis
USGS Topo · 1:62,500
1944 · Valley Springs
USGS Topo · 1:62,500