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 1476–1500 of 1,630
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Triangle Lake Dam Adams County | 18 | 2000 | Low | Not Available |
| Truax Lake Dam Fulton County | 20 | 1955 | Low | Not Available |
| Trudi Lake Dam Henderson County | 23 | 1954 | Low | Not Available |
| Tullamore Dam Lake County | 17 | 1994 | High | Not Available |
| Turkey Hill Lake Dam St. Clair County | 28 | 1954 | Low | Not Available |
| Turkey Hollow Reservoir Dam Rock Island County | 20 | 1961 | Low | Not Available |
| Twenty One Guns Campground Lake Dam Clark County | 30 | 1957 | Significant | Not Available |
| Twin Lake Dam St. Clair County | 15 | — | Significant | Not Available |
| Twin Lakes Dam Madison County | 28 | 1949 | Low | Not Available |
| Twin Lakes Drive Dam Madison County | — | 1980 | Significant | Not Available |
| Twin Lakes Lane South Lake Dam Madison County | 31 | 1966 | Low | Not Available |
| Ulrich Lake Dam Pulaski County | 13 | 1955 | Low | Not Available |
| Underground Mine Water Management Storage Impound. Saline County | 15 | — | Low | Not Available |
| Underwood Pond Dam Peoria County | 34 | 1956 | Low | Not Available |
| Unimin Tailings Pond O Dam LaSalle County | 56 | 2010 | Low | Not Available |
| Union Pacific Global Iii Dam Ogle County | 18 | 2002 | Low | Not Available |
| Upper Columbia Quarry Lake Dam Macoupin County | 18 | 1900 | Low | Not Available |
| Upper Salt Creek Structure 2 Dam Cook County | 23 | 1984 | High | Not Available |
| Upper Salt Creek Structure 3 Dam Cook County | 26 | 1985 | High | Not Available |
| Upper Salt Creek Structure 4 Dam Cook County | 14 | 1987 | High | Not Available |
| Upper Spring Lake Dam Carroll County | 12 | — | Low | Not Available |
| Upper Sterling Whiteside County | 10 | 1907 | Low | Satisfactory |
| Valevue Lake Dam Morgan County | 20 | 1970 | Significant | Not Available |
| Valier Lake Dam Franklin County | 21 | 1905 | High | Not Available |
| Valley Friends Lake Dam Rock Island County | 47 | 1965 | Low | Not Available |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.