
Clarence Cannon Reservoir dominates the northwestern corner of this Ralls County landscape, reflecting the hydraulic engineering of the early 1970s. The surrounding terrain is defined by a dense network of waterways including the South Fork, Spencer Creek, and Straight Branch, which carve through the townships of Center and Jasper. This era of development is marked by industrial and utility infrastructure, such as a prominent Pipeline, a Pumping Station, and a Radio Tower near the small settlement of Noonan.
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1890 · Louisiana
USGS Topo · 1:125,000
1890 · Mexico
USGS Topo · 1:125,000
1903 · Palmyra
USGS Topo · 1:125,000
1932 · Hannibal
USGS Topo · 1:62,500
1936 · Hannibal
USGS Topo · 1:48,000
1943 · Vandalia
USGS Topo · 1:62,500
1945 · Hannibal
USGS Topo · 1:62,500
1945 · Perry
USGS Topo · 1:62,500
1945 · Vandalia
USGS Topo · 1:62,500
1948 · Quincy
USGS Topo · 1:250,000