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 1376–1400 of 1,630
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Starved Rock Lock and Dam LaSalle County | 35 | 1933 | Significant | Not Available |
| Staunton Coal Company Reservoir Dam Madison County | 34 | 1958 | Low | Not Available |
| Staunton Country Club Lake Dam Macoupin County | 35 | 1922 | Low | Not Available |
| Staunton Old Mine Refuse Dam Macoupin County | 45 | 1984 | Low | Not Available |
| Staunton Reservoir Dam Macoupin County | 43 | 1926 | Low | Not Available |
| St. Charles Dam Kane County | 7 | 1918 | Significant | Not Available |
| St. Clair County Retention Pond 1 Dam St. Clair County | 31 | 1999 | High | Not Available |
| Steel Rock Island County | 11 | 1912 | Low | Not Available |
| St. Elmo Old City Reservoir Dam Fayette County | 23 | 1903 | Significant | Not Available |
| Stephen A. Forbes State Park Lake Dam Marion County | 46 | 1963 | Significant | Not Available |
| Stevens Lake Dam Fulton County | 20 | 1965 | High | Not Available |
| St. Marys Lake Dam Lake County | 12 | 1921 | High | Not Available |
| Stonebridge Crossing Dam Madison County | 29 | 2005 | Significant | Not Available |
| Stone Creek Golf Club Lake Dam Jackson County | 43 | 2001 | High | Not Available |
| Stonegate Lake Dam Monroe County | 23 | 1960 | High | Not Available |
| Stonehenge Lake Dam St. Clair County | 33 | 2008 | Significant | Not Available |
| Stone Pond Dam Bond County | 31 | 1969 | Low | Not Available |
| Stonewolf Golf Course Lake Dam St. Clair County | 72 | 1998 | High | Not Available |
| St. Peter Sportsman Lake Dam Fayette County | 30 | 1951 | Low | Not Available |
| Stratton Lock and Dam McHenry County | 7 | 1939 | Significant | Not Available |
| Streamwood Golf Course Dam Cook County | 8 | 1989 | Low | Not Available |
| Streator Vermilion River Dam Livingston County | 14 | 1925 | Significant | Not Available |
| Stroyan Lake Dam Lee County | 14 | 1966 | Low | Not Available |
| Structure No. 12 Johnson County | 54 | 1974 | Significant | Not Rated |
| Stumpy Hill Farm Dam Edwards County | 31 | 1998 | Low | Not Available |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.