Big Sage Reservoir and a complex network of smaller water management sites dominate this high-desert landscape in northeastern California. At the time of this 2012 survey, the area was defined by its water resources, including the Raker and Thomas Reservoirs, Emigrant Spring Reservoir, and Pretty Tree Reservoir. These names, alongside Rattlesnake Ditch, reflect the critical importance of irrigation and water storage for the local Modoc County economy.
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1886 · Alturas
USGS Topo · 1:250,000
1892 · Alturas
USGS Topo · 1:250,000
1954 · Alturas
USGS Topo · 1:250,000
1958 · Alturas
USGS Topo · 1:250,000
1961 · Alturas
USGS Topo · 1:62,500
1962 · Alturas
USGS Topo · 1:250,000
1962 · Davis Creek
USGS Topo · 1:62,500
1962 · Big Sage Reservoir
USGS Topo · 1:62,500
1963 · Dorris Reservoir
USGS Topo · 1:24,000
1965 · Alturas
USGS Topo · 1:250,000