Quartz Valley and Scott Valley define the landscape of this Siskiyou County region, where the historical legacy of hydraulic mining and irrigation is written into the terrain. A complex network of engineered waterways, including the Custer Ditch, Fretis Ditch, and Oro Fino Ditch, cuts across the slopes of Quartz Hill and Chaparral Hill, feeding into the valleys below. These ditches represent the labor-intensive infrastructure required to support early gold mining and later agricultural efforts in the northern California interior.
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1886 · Shasta
USGS Topo · 1:250,000
1894 · Shasta
USGS Topo · 1:250,000
1914 · Seiad
USGS Topo · 1:125,000
1922 · Seiad
USGS Topo · 1:125,000
1923 · Sawyers Bar
USGS Topo · 1:125,000
1931 · Etna
USGS Topo · 1:96,000
1932 · Yreka
USGS Topo · 1:96,000
1934 · Etna
USGS Topo · 1:125,000
1939 · Yreka
USGS Topo · 1:125,000
1948 · Weed
USGS Topo · 1:250,000