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 51–75 of 360
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Tara Lake Dam Kane County | 23 | 1964 | Significant | Not Available |
| Tampier Lake Dam Cook County | 9 | 1964 | Significant | Not Available |
| Sylvan Lake Dam Lake County | 15 | 1920 | Significant | Not Available |
| Swint Lake Dam Henry County | 34 | 1968 | Significant | Not Available |
| Sugar Creek Lake Dam Wabash County | 14 | — | Significant | Not Available |
| Structure No. 12 Johnson County | 54 | 1974 | Significant | Not Rated |
| Streator Vermilion River Dam Livingston County | 14 | 1925 | Significant | Not Available |
| Stratton Lock and Dam McHenry County | 7 | 1939 | Significant | Not Available |
| Stonehenge Lake Dam St. Clair County | 33 | 2008 | Significant | Not Available |
| Stonebridge Crossing Dam Madison County | 29 | 2005 | Significant | Not Available |
| Stephen A. Forbes State Park Lake Dam Marion County | 46 | 1963 | Significant | Not Available |
| St. Elmo Old City Reservoir Dam Fayette County | 23 | 1903 | Significant | Not Available |
| St. Charles Dam Kane County | 7 | 1918 | Significant | Not Available |
| Starved Rock Lock and Dam LaSalle County | 35 | 1933 | Significant | Not Available |
| Spring Valley WWTP Lagoon Dam Bureau County | 17 | — | Significant | Not Available |
| Spring Lake Road Dam St. Clair County | 21 | 1968 | Significant | Not Available |
| Spring Lake Dam Winnebago County | 10 | 1965 | Significant | Not Available |
| Spring Lake Dam McDonough County | 46 | 1927 | Significant | Not Available |
| Springfield Coal/Orient 6 /South Slurry Cell Dam Jefferson County | 54 | 1985 | Significant | Not Available |
| Sparta Old City Reservoir Dam Randolph County | 21 | 1917 | Significant | Not Available |
| Sparta New City Reservoir Dam Randolph County | 16 | 1952 | Significant | Not Available |
| Smithland Locks and Dam Livingston County | 56 | 1980 | Significant | Not Available |
| Smith Lake Dam Peoria County | 47 | 1969 | Significant | Not Available |
| Simpson Lake Dam Johnson County | 23 | 1963 | Significant | Not Available |
| Silver Lake Dam Madison County | 29 | 1962 | Significant | Not Available |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.