Low Elevation
< 580 feet above mean sea level
Low Place
Des Plaines River
Low Quad Name
Sag Bridge
Low PLSS
3-16-37N-11E
Low Geology
River valley cut into Silurian/Devonian dolomite
High Elevation
> 820 feet above mean sea level
High Place
unnamed hilltop
High Quad Name
Lombard
High PLSS
3-28-40N-10E
High Geology
Kenneyville Moraine
Area
333.51 square miles
Total Relief
240 feet
Percent Slope
0.88%