Lowest and Highest Points in Will County
Low elevation:
<510 feet above mean sea level
Places: Des Plaines and Kankakee Rivers
7.5' quadrangle names: Channahon
and Wilmington
PLSS: 3-31-34N-9E and 3-6-33N-9E
Geology: Cahokia Alluvium in river valley
High elevation: >830 feet above mean sea level
Place: Unnamed hilltop
7.5' quadrangle name: Frankfort
PLSS: 3-19-34N-13E
Geology: Wheaton Moraine
Area: 841.22 square miles
Total relief (approximate): 320 feet
Average percent slope: 0.84%
Places: Des Plaines and Kankakee Rivers
7.5' quadrangle names: Channahon
and Wilmington
PLSS: 3-31-34N-9E and 3-6-33N-9E
Geology: Cahokia Alluvium in river valley
High elevation: >830 feet above mean sea level
Place: Unnamed hilltop
7.5' quadrangle name: Frankfort
PLSS: 3-19-34N-13E
Geology: Wheaton Moraine
Area: 841.22 square miles
Total relief (approximate): 320 feet
Average percent slope: 0.84%
Updated 05/27/2011 SLD