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 1–5 of 5
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Whoopie Cat Hardin County | 44 | 1977 | Significant | Poor |
| Lake Chautauqua Upper Dam Mason County | 21 | 1916 | Low | Poor |
| Lake Chautauqua Lower Dam Fulton County | 20 | 1920 | Low | Poor |
| Dam A-41 Williamson County | 24 | 1965 | Low | Poor |
| Arsenal Power Rock Island County | 29 | 1878 | Low | Poor |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.