
Upper Lake serves as the focal point for this late-1970s orthophotoquad, where the transition from flat valley agriculture to steep mountainous terrain is captured with photographic precision. The fertile corridor of Bachelor Valley is clearly visible, showing a patchwork of cultivated fields and orchard layouts that have long defined the local economy. Water management is a central theme in this landscape, dominated by the drainage of Middle Creek as it winds toward the larger basin. To the southwest, the rise of White Rock Mtn provides a stark topographic contrast to the settlement area, illustrating the natural boundaries that shaped the development of northern Lake County. This aerial perspective, prepared by the Geological Survey, offers researchers a raw look at land use and vegetation patterns before modern expansion altered these rural outskirts.
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This is the sole edition of this map. No revisions or reprints were ever made.
1920 · Ukiah
USGS Topo · 1:62,500
1922 · Hullville
USGS Topo · 1:62,500
1938 · Lakeport
USGS Topo · 1:62,500
1943 · Pomo
USGS Topo · 1:62,500
1944 · Ukiah
USGS Topo · 1:62,500
1951 · Lake Pillsbury
USGS Topo · 1:62,500
1951 · Lakeport
USGS Topo · 1:62,500
1957 · Ukiah
USGS Topo · 1:250,000
1958 · Purdys Gardens
USGS Topo · 1:24,000
1958 · Cow Mountain
USGS Topo · 1:24,000