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 126–150 of 251
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Lake Lorraine Dam St. Clair County | 19 | 1900 | High | Not Available |
| Lake Lou Yaeger Dam Montgomery County | 54 | 1966 | High | Not Available |
| Lake McMaster Dam Knox County | 81 | 1981 | High | Not Available |
| Lake Mendota Dam LaSalle County | 17 | 1890 | High | Not Available |
| Lake of Egypt Dam Williamson County | 55 | 1962 | High | Not Available |
| Lake of The Woods 2 Dam Monroe County | — | — | High | Not Available |
| Lake Petersburg Dam Menard County | 85 | 1961 | High | Not Available |
| Lake Prestbury Dam Kane County | 14 | 1966 | High | Not Available |
| Lake Rice Dam Knox County | 35 | 1895 | High | Not Available |
| Lake Stolberg Dam St. Clair County | 16 | 1904 | High | Not Available |
| Lake Storey Dam Knox County | 53 | 1942 | High | Not Available |
| Lake Summerset Dam Winnebago County | 44 | 1969 | High | Not Available |
| Lake Tanglewood Dam Marshall County | 40 | 1969 | High | Not Available |
| Lake Taylorville Dam Christian County | 27 | 1961 | High | Not Available |
| Lake Thunderbird Dam Putnam County | 86 | 1970 | High | Not Available |
| Lake Vermilion Dam Vermilion County | 45 | 1925 | High | Not Available |
| Lancaster Court Dam Lake County | 8 | — | High | Not Available |
| Lasalle Co. Nuclear Station Cooling Lake Dam LaSalle County | 43 | 1977 | High | Not Available |
| Lawrence Lake Dam St. Clair County | 24 | 1943 | High | Not Available |
| Leroy Hinkle Dam Carroll County | 74 | 1974 | High | Not Available |
| Levings Lake Dam Winnebago County | 23 | 1935 | High | Not Available |
| Lincoln Trail State Park Lake Dam Clark County | 52 | 1956 | High | Not Available |
| Litchfield City Lake Dam Montgomery County | 51 | 1925 | High | Not Available |
| Little Grassy Dam Williamson County | 88 | 1942 | High | Fair |
| L & N Reservoir Jefferson County | 25 | 1910 | High | Not Available |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.