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Hamilton County
Low elevation: <350 feet above mean sea level
Place: North Fork of the Saline River
7.5' quadrangle name: Broughton
PLSS: 3-15-7S-7E
Geology: Equality Formation, Carmi Member, lake bottom deposits
High elevation: >630 feet above mean sea level
Place: Unnamed hilltop
7.5' quadrangle name: Macedonia
PLSS: 3-3-5S-5E
Geology: Possibly Vandalia till upland? Hagarstown kame?
Area: 431.24 square miles
Total relief (approximate): 280 feet
Average percent slope: 1.07%
State of Illinois | Illinois Department of Natural Resources | University of Illinois