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 201–225 of 1,630
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Taylor Lake Dam Knox County | 21 | 1966 | Low | Not Available |
| Taylor Lake Dam Peoria County | 36 | — | Low | Not Available |
| Tara Lake Dam Kane County | 23 | 1964 | Significant | Not Available |
| Taphorn Pond Dam Randolph County | 31 | 1967 | Low | Not Available |
| Tampier Lake Dam Cook County | 9 | 1964 | Significant | Not Available |
| Tall Tree Lake Dam Johnson County | 29 | 1964 | Low | Not Available |
| Tall Timbers Lake West Dam Macoupin County | 24 | 1975 | Low | Not Available |
| Tall Timbers Lake East Dam Macoupin County | 14 | 1921 | Low | Not Available |
| Tailing Pond 127 Dam Ogle County | 38 | 1991 | High | Not Available |
| Sylvan Lake Dam Lake County | 15 | 1920 | Significant | Not Available |
| Swint Lake Dam Henry County | 34 | 1968 | Significant | Not Available |
| Sweet Farms Lake Dam Clark County | 30 | 1960 | Low | Not Available |
| Sweeneys Pond Dam Fulton County | 34 | 1952 | Low | Not Available |
| Swearington Lake Dam Mercer County | 39 | 1973 | Low | Not Available |
| Swagmeyer Pond Dam Morgan County | 31 | 1977 | Low | Not Available |
| Sutton Pond Dam Tazewell County | 27 | 1965 | Low | Not Available |
| Superior Lake Dam Jefferson County | 23 | 1953 | Low | Not Available |
| Superior 4 Dam Macoupin County | 20 | 1950 | Low | Not Available |
| Sunset Lake Dam Wayne County | 19 | 1970 | Low | Not Available |
| Sunset Lake Dam McLean County | 21 | 1975 | Low | Not Available |
| Sunset Hills Lake Dam Clinton County | 11 | 2007 | Low | 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 |
| Sullivan Lake Dam Fulton County | 34 | 1965 | Low | Not Available |
| Suhling Pond Dam Macoupin County | 26 | 1978 | Low | Not Available |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.