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 1–6 of 6
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Quiver Creek Weir Dam Mason County | 17 | 1988 | Low | Fair |
| Pounds Hollow Gallatin County | 43 | 1939 | Significant | Fair |
| One Horse Gap Pope County | 36 | 1973 | Significant | Fair |
| Moline Power Rock Island County | 31 | 1896 | Low | Fair |
| Little Grassy Dam Williamson County | 88 | 1942 | High | Fair |
| Crab Orchard Dam Williamson County | 65 | 1939 | High | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.