Coles County

Low elevation:<550 feet above mean sea level
    Place: Embarras River
    7.5' quadrangle name: Charleston South
    PLSS: 3-22-11N-9E
    Geology: Cahokia Alluvium

High elevation: >780 feet above mean sea level
    Place: Unnamed hilltop
    7.5' quadrangle name: Westfield West
    PLSS: 3-30-12N-11E
    Geology: Nevins Moraine

Area: 504.87 square miles
    Total relief (approximate): 230 feet
    Average percent slope: 0.84%

ILLINOIS STATE GEOLOGICAL SURVEY
INSTITUTE OF NATURAL RESOURCE SUSTAINABILITY | UNIVERSITY OF ILLINOIS AT URBANA-CHAMPAIGN

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Updated 5/4/2007 JKH