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 826–850 of 1,630
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Lake Piasa Dam Jersey County | 47 | 1963 | Low | Not Available |
| Lake Petersburg Dam Menard County | 85 | 1961 | High | Not Available |
| Lake Pauline Dam Effingham County | 38 | 1951 | Significant | Not Available |
| Lake of The Woods Dam Champaign County | 30 | 1940 | Significant | Not Available |
| Lake of The Woods Dam Peoria County | 58 | 1964 | Significant | Not Available |
| Lake of The Woods 2 Dam Monroe County | — | — | High | Not Available |
| Lake of The Woods 1 Dam Monroe County | 21 | 1974 | Low | Not Available |
| Lake of The Whispering Oaks Dam Tazewell County | 20 | 1973 | Low | Not Available |
| Lake of The Coves Dam Cook County | 10 | 1969 | Low | Not Available |
| Lake of Egypt Dam Williamson County | 55 | 1962 | High | Not Available |
| Lake of Dreams Dam Jersey County | 35 | 1992 | Low | Not Available |
| Lake Normandy Dam Jefferson County | 19 | 1969 | Low | Not Available |
| Lake Nelson Dam Mercer County | 14 | 1937 | Low | Not Available |
| Lake Nellie Dam Fayette County | 41 | 1963 | Significant | Not Available |
| Lake Murphysboro Dam Jackson County | 46 | 1947 | Significant | Not Available |
| Lake Mt. Sterling Dam Brown County | 38 | 1935 | Low | Not Available |
| Lake Moses Dam Franklin County | 10 | 1918 | Significant | Not Available |
| Lake Mingo Dam Vermilion County | 47 | 1981 | Significant | Not Available |
| Lake Mildred Dam Monroe County | 19 | 1950 | Low | Not Available |
| Lake Mendota Dam LaSalle County | 17 | 1890 | High | Not Available |
| Lake Meadow Dam Madison County | 30 | 1967 | Low | Not Available |
| Lake McMaster Dam Knox County | 81 | 1981 | High | Not Available |
| Lake Mauvaise Terre Dredge Basin Dam Morgan County | 17 | — | Low | Not Available |
| Lake Mattoon Dam Shelby County | 46 | 1957 | Significant | Not Available |
| Lake Matherville Dam Mercer County | 37 | 1926 | Low | Not Available |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.