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 776–800 of 1,630
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Leo Johnson Lake Dam Whiteside County | 20 | 1962 | Low | Not Available |
| Lentman Lake Dam Livingston County | 12 | 1965 | Low | Not Available |
| Lemons Pond Dam Fulton County | 26 | 1973 | Low | Not Available |
| Leisure Oak Lake 2 Dam Peoria County | 31 | 1965 | Low | Not Available |
| Leisure Oak Lake 1 Dam Peoria County | 31 | 1966 | Low | Not Available |
| Lee Lake Dam Ford County | 20 | 2000 | Low | Not Available |
| Le Baube Lake Dam Tazewell County | 38 | 1970 | Low | Not Available |
| Lawrenceville Sewage Basin Dam Lawrence County | 17 | 1990 | Low | Not Available |
| Lawrence Lake Dam St. Clair County | 24 | 1943 | High | Not Available |
| Laue Lake Dam Ford County | 16 | 1964 | Low | Not Available |
| Lashbrook Pond Dam Clark County | 40 | 1967 | Low | Not Available |
| Lasalle Co. Nuclear Station Cooling Lake Dam LaSalle County | 43 | 1977 | High | Not Available |
| Lanny Jokers Dam Macoupin County | 42 | — | Low | Not Available |
| Langley Pond Dam Shelby County | 34 | 1968 | Low | Not Available |
| Langford Pond Dam Randolph County | 25 | 1951 | Low | Not Available |
| Lancaster Court Dam Lake County | 8 | — | High | Not Available |
| Lakewood Subdivision Lake 3 Dam Madison County | 35 | — | Significant | Not Available |
| Lakewood Subdivision Lake 2 Dam Madison County | 29 | 1965 | Low | Not Available |
| Lakewood Subdivision Lake 1 Dam Madison County | 25 | 1965 | Low | Not Available |
| Lakewood Lake Dam Marion County | 17 | 1910 | Significant | Not Available |
| Lakewood Hills Lake Dam Winnebago County | — | — | Significant | Not Available |
| Lake Windsor Dam Knox County | 45 | 1965 | Low | Not Available |
| Lake Windermere Dam Coles County | 28 | 1974 | Low | Not Available |
| Lake Williamson Dam Macoupin County | 39 | 1974 | Low | Not Available |
| Lake Wildwood Haven Dam Fulton County | 44 | 1971 | Low | Not Available |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.