Illinois Dams
1,630 dams tracked by the National Inventory of Dams
Total Dams
1,630
High Hazard
251
15.4%
Poor / Unsatisfactory
6
Average Age
61 yrs
Hazard Classification
High251 (15.4%)
Significant360 (22.1%)
Low1,008 (61.8%)
Condition Assessment
Satisfactory8 (0.5%)
Fair6 (0.4%)
Poor / Unsatisfactory6 (0.4%)
Not Rated1,610 (98.8%)
Federal
48
State
68
Local
286
Private
1,153
Tallest Dams
- Refuse Disposal Area175 ft
- Shelbyville Dam138 ft
- Duck Creek Station Dams123 ft
- Devil`s Kitchen Dam121 ft
- Macoupin Energy Refuse Disposal Area 6117 ft
High Hazard Dams
Poor Condition Dams
- Whoopie CatPoor
- Arsenal Power Poor
- Dam A-41Poor
- Lake Chautauqua Upper DamPoor
- Lake Chautauqua Lower DamPoor
All Dams in Illinois
Showing 876–900 of 1,630
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Lake In The Hills Dam 1 McHenry County | 40 | 1926 | High | Not Available |
| Lake In The Hills 3 Dam McHenry County | 10 | 1940 | Low | Not Available |
| Lake In The Hills 2 Dam McHenry County | 15 | 1947 | Significant | Not Available |
| Lake Indian Hills Dam Jackson County | 36 | 1980 | Low | Not Available |
| Lake Holiday Dam Peoria County | 40 | 1953 | Low | Not Available |
| Lake Hillsboro Dam Montgomery County | 34 | 1917 | Significant | Not Available |
| Lake Hillcrest Dam Madison County | 40 | 1956 | Significant | Not Available |
| Lake Henry Dam Jackson County | 13 | 1963 | Low | Not Available |
| Lake Helen Dam Hamilton County | 26 | 1959 | Low | Not Available |
| Lake Heights Dam Madison County | 27 | 1944 | Significant | Not Available |
| Lake Hamilton Dam Franklin County | 13 | 1912 | Significant | Not Available |
| Lake Glenn Shoals Dam Montgomery County | 56 | 1978 | Significant | Not Available |
| Lake Glendale Pope County | 38 | 1938 | Significant | Satisfactory |
| Lake George Dam Rock Island County | 78 | 1962 | High | Not Available |
| Lake George Dam Cook County | 20 | 1969 | High | Not Available |
| Lake Galena Sed Pond 1 Dam Jo Daviess County | 25 | 1989 | Low | Not Available |
| Lake Emmett Dam Monroe County | 23 | 1949 | Low | Not Available |
| Lake Ellyn Dam DuPage County | 12 | 1991 | Significant | Not Available |
| Lake Edward Dam Macoupin County | 20 | 1949 | Low | Not Available |
| Lake Echon Dam Johnson County | 16 | 1968 | Low | Not Available |
| Lake Duquoin Dam Perry County | 18 | 1937 | Significant | Not Available |
| Lake Decatur Dam Macon County | 33 | 1922 | High | Not Available |
| Lake Coulterville Dam Randolph County | 18 | 1917 | Low | Not Available |
| Lake Como Dam Johnson County | 41 | 1966 | Significant | Not Available |
| Lake Christine Dam St. Clair County | 20 | 1894 | High | Not Available |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.