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 501–525 of 1,630
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Gower Pond Dam 1 Livingston County | 23 | 1975 | Low | Not Available |
| Grahams Lake Dam Peoria County | 32 | 1950 | Low | Not Available |
| Grande Park Subdivision Detention As-7 Dam Kendall County | 8 | 2004 | Low | Not Available |
| Grand Oaks Lake Dam Tazewell County | 22 | 1978 | Significant | Not Available |
| Grand Tower Station Ash Pond Jackson County | 15 | — | Significant | Not Available |
| Grandwood Lake Dam Lake County | — | — | High | Not Available |
| Grasslands Basin Dam Cook County | 10 | — | High | Not Available |
| Gravel Springs Dam Morgan County | 28 | 1990 | Low | Not Available |
| Gray Hawk Center Dam Lake County | 8 | — | Significant | Not Available |
| Greendale Lake Dam Clay County | 15 | 1926 | Significant | Not Available |
| Greenfield City Dam Greene County | 33 | 1959 | Significant | Not Available |
| Greenview Country Club Pond 1 Dam Marion County | 18 | 1965 | Low | Not Available |
| Greenville Livestock Holding Pond 1 Dam Clinton County | 14 | 2011 | Low | Not Available |
| Greenville New City Dam Bond County | 40 | 1969 | Significant | Not Available |
| Greenville Old City Lake Dam Bond County | 30 | 1936 | Low | Not Available |
| Greenville Rod and Gun Club Lake Dam Bond County | 19 | 1906 | Low | Not Available |
| Greenwood Lake Dam Champaign County | 15 | 1960 | Significant | Not Available |
| Gridley Dam Cass County | 51 | 1998 | Low | Not Available |
| Grieves Dam Fulton County | 28 | 1998 | Significant | Not Available |
| Griffin South Pond Dam Peoria County | 26 | 1967 | Low | Not Available |
| Griffith Farm Lake Dam White County | 25 | 1964 | Significant | Not Available |
| Grindstaff Hollow Club Lake Dam Gallatin County | 29 | 1961 | Low | Not Available |
| Gross Farms Dam Morgan County | 27 | 2005 | Low | Not Available |
| Gun Club Lake Dam Will County | 20 | 1969 | Significant | Not Available |
| Gvillo Pond Dam Madison County | 36 | 1970 | Low | Not Available |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.