 |
Menard County
Low elevation: <460 feet above mean sea level
Place: Sangamon River
7.5' quadrangle name: Oakford
PLSS: 3-10-19N-8W
Geology: Cahokia Alluvium and till in river valley
High elevation: >645 feet above mean sea level
Place: 4 unnamed small upland hills
7.5' quadrangle name: Tallula
PLSS: 3-22-17N-8W
Geology: Illinois Vandalia till member upland
Area: 311.94 square miles
Total relief (approximate): 185 feet
Average percent slope: 0.98%
State of Illinois | Illinois Department of Natural Resources | University of Illinois