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 26–50 of 251
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Tailing Pond 127 Dam Ogle County | 38 | 1991 | High | Not Available |
| Sunset Hills Lake 2 Dam Tazewell County | 35 | 1964 | High | Not Available |
| Sunset Hills Lake 1 Dam Tazewell County | 42 | 1964 | High | Not Available |
| Sugar Camp/Mine 1/North Refuse Disposal Facility Dam Franklin County | 117 | — | High | Not Available |
| Sugar Camp/Mine 1/Coal Refuse Disposal 1 Dam Franklin County | 86 | — | High | Not Available |
| Stonewolf Golf Course Lake Dam St. Clair County | 72 | 1998 | High | Not Available |
| Stonegate Lake Dam Monroe County | 23 | 1960 | High | Not Available |
| Stone Creek Golf Club Lake Dam Jackson County | 43 | 2001 | High | Not Available |
| St. Marys Lake Dam Lake County | 12 | 1921 | High | Not Available |
| Stevens Lake Dam Fulton County | 20 | 1965 | High | Not Available |
| St. Clair County Retention Pond 1 Dam St. Clair County | 31 | 1999 | High | Not Available |
| Springfield Coal/Orient 4/East Slurry Imp Williamson County | 66 | 1985 | High | Not Available |
| Spring Arbor Lake Dam Jackson County | 55 | 1972 | High | Not Available |
| Spoon Lake Dam Knox County | 74 | 1971 | High | Not Available |
| Spaulding Dam Sangamon County | 48 | 1933 | High | Not Available |
| Spaniel Lake Dam Will County | 12 | — | High | Not Available |
| South Side Detention Basin Berm 1 Dam Coles County | 12 | 2011 | High | Not Available |
| Smallpox Creek Dam Jo Daviess County | 60 | 1974 | High | Not Available |
| Sky Harbor Detention Area A Dam Will County | 7 | 2008 | High | Not Available |
| Si Energy/Mine 25/Slurry Cell 2 Dam Franklin County | 55 | 1987 | High | Not Available |
| Shoal Creek Structure 5 Dam Montgomery County | 30 | 1973 | High | Not Available |
| Shelbyville Dam Shelby County | 138 | 1970 | High | Not Available |
| Shaw Lake Dam Macoupin County | 23 | — | High | Not Available |
| Sauk Trail Dam Will County | 34 | 1980 | High | Not Available |
| Sangchris Lake Dam Christian County | 55 | 1967 | High | Not Available |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.