|
|||
Calhoun County
Low elevation: <420 feet above mean sea level Place: Illinois and Mississippi Rivers 7.5' quadrangle name: Grafton PLSS: 4-6-13S-1E Geology: Cahokia Alluvium, river valley High elevation: >815 feet above mean sea level Place: unnamed hilltop 7.5' quadrangle name: Foley PLSS: 4-14-11N-2W Geology: Providence Moraine, Wisconsin end moraine Area: 280.66 square miles Total relief (approximate): 395 feet Average percent slope: 3.55%
|
|||
|
Home
| Search
| Site Map
| Contact Us State of Illinois | Illinois Department of Natural Resources | University of Illinois |
|||
| Updated 5/4/2007 JKH | |||