LaPlace and Lake City anchor this central Illinois landscape, where the flat agricultural terrain of Macon, Piatt, and Moultrie counties is defined by a highly managed drainage system. This 2015 survey illustrates how the natural hydrology of the W Okaw River and Stringtown Br has been extensively supplemented by engineered channels like Ditch Number 3 and the Hammond Mutual Ditch to support the region's productive farmland.
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This is the sole edition of this map. No revisions or reprints were ever made.
1929 · Decatur
USGS Topo · 1:62,500
1933 · Decatur
USGS Topo · 1:62,500
1935 · Sullivan
USGS Topo · 1:48,000
1940 · Sullivan
USGS Topo · 1:62,500
1949 · Dalton City
USGS Topo · 1:62,500
1955 · Bement
USGS Topo · 1:62,500
1958 · Decatur
USGS Topo · 1:250,000
1961 · Decatur
USGS Topo · 1:250,000
1967 · Long Creek
USGS Topo · 1:24,000
1967 · Argenta
USGS Topo · 1:24,000