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Jersey County
Low elevation: <420 feet above mean sea level Place: Mississippi River 7.5' quadrangle name: Elsah PLSS: 3-36-6N-11W Geology: Cahokia Alluvium in river valley High elevation: >885 feet above mean sea level Place: Unnamed hilltop 7.5' quadrangle name: Otterville PLSS: 3-36-7N-13W Geology: Mississippian Kinderhookian limestone ridge Area: 373.43 square miles Total relief (approximate): 465 feet Average percent slope: 2.17%
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| Updated 5/4/2007 JKH | |||