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 251–275 of 360
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Hawthorne Hills Lake Dam Jefferson County | 18 | 1969 | Significant | Not Available |
| Harrison Park West Detention Dam Winnebago County | 15 | — | Significant | Not Available |
| Harrison Park East Detention Pond Dam Winnebago County | 15 | — | Significant | Not Available |
| Harrisburg-Sahara Retention Impoundment Dam Saline County | 25 | 2003 | Significant | Not Available |
| Harmon Pond Dam Bureau County | 37 | 1974 | Significant | Not Available |
| Happy Hollow Lake Dam Knox County | 52 | 1940 | Significant | Not Available |
| Happy Hollow Lake 2 Dam Knox County | 34 | 1965 | Significant | Not Available |
| Hambaugh-Martin 2 Dam Brown County | 21 | 1959 | Significant | Not Available |
| Gun Club Lake Dam Will County | 20 | 1969 | Significant | Not Available |
| Griffith Farm Lake Dam White County | 25 | 1964 | Significant | Not Available |
| Grieves Dam Fulton County | 28 | 1998 | Significant | Not Available |
| Greenwood Lake Dam Champaign County | 15 | 1960 | Significant | Not Available |
| Greenville New City Dam Bond County | 40 | 1969 | Significant | Not Available |
| Greenfield City Dam Greene County | 33 | 1959 | Significant | Not Available |
| Greendale Lake Dam Clay County | 15 | 1926 | Significant | Not Available |
| Gray Hawk Center Dam Lake County | 8 | — | Significant | Not Available |
| Grand Tower Station Ash Pond Jackson County | 15 | — | Significant | Not Available |
| Grand Oaks Lake Dam Tazewell County | 22 | 1978 | Significant | Not Available |
| Gordon F. Moore Park Dam Madison County | 27 | 1988 | Significant | Not Available |
| Goin Lake Dam Hamilton County | 20 | 1975 | Significant | Not Available |
| Glen O. Jones Lake Dam Saline County | 42 | 1963 | Significant | Not Available |
| Ginger Lake Dam Madison County | 24 | 2002 | Significant | Not Available |
| Gill Lake Dam Schuyler County | 30 | 1974 | Significant | Not Available |
| Georgetown Dam Vermilion County | 14 | 1937 | Significant | Not Available |
| Galvins Lake Dam Cook County | 10 | 1938 | Significant | Not Available |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.