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Jefferson County
Low elevation: <410 feet above mean sea level Place: Rend Lake 7.5' quadrangle name: Waltonville PLSS: 3-16-4S-2E Geology: Lake in river valley High elevation: >630 feet above mean sea level Place: Unnamed hilltop 7.5' quadrangle name: Kell PLSS: 3-2-1S-2E Geology: Vandalia till upland over Pennsylvanian Mattoon FormationHagarstown ridge Area: 577.55 square miles Total relief (approximate): 220 feet Average percent slope: 0.95%
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| Updated 5/4/2007 JKH | |||