
The Sierra Nevada foothills outside of Sonora are defined by a complex network of historic water management and mining-era infrastructure. Industrial legacies are visible through the Sierra RR corridor as it winds through Standard and near Ralph, serving a landscape where natural drainage like Sullivan Creek and Turnback Creek is augmented by man-made features such as the Phoenix Ditch and Algerine Ditch. These waterways historically supported the intensive hydraulic and quartz mining operations that once drove the local economy.
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1891 · Big Trees
USGS Topo · 1:125,000
1893 · Sonora
USGS Topo · 1:125,000
1894 · Big Trees
USGS Topo · 1:125,000
1896 · Sonora
USGS Topo · 1:125,000
1897 · Sonora
USGS Topo · 1:125,000
1897 · Big Trees
USGS Topo · 1:125,000
1898 · Sonora
USGS Topo · 1:125,000
1901 · Big Trees
USGS Topo · 1:125,000
1947 · Sacramento
USGS Topo · 1:250,000
1947 · San Jose
USGS Topo · 1:250,000