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Lawrence County Low elevation: <395 feet above mean sea level Place: Wabash River 7.5' quadrangle names: St. Francisville PLSS: 2-29-2N-11W Geology: Cahokia Alluvium in river valley High elevation: >630 feet above mean sea level Place: Red Hills Chapel 7.5' quadrangle name: Sumner PLSS: 2-34-4N-13W Geology: Illinois Vandalia till over Pennsylvanian Mattoon formation?? Area: 369.94 square miles Total relief (approximate): 235 feet Average percent slope: 0.84%
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| Updated 5/4/2007 JKH | |||||