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 851–875 of 1,630
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Leisure Oak Lake 1 Dam Peoria County | 31 | 1966 | Low | Not Available |
| Leisure Oak Lake 2 Dam Peoria County | 31 | 1965 | Low | Not Available |
| Lemons Pond Dam Fulton County | 26 | 1973 | Low | Not Available |
| Lentman Lake Dam Livingston County | 12 | 1965 | Low | Not Available |
| Leo Johnson Lake Dam Whiteside County | 20 | 1962 | Low | Not Available |
| Leroy Hinkle Dam Carroll County | 74 | 1974 | High | Not Available |
| Lester Lake Dam Marion County | 26 | 1935 | Low | Not Available |
| Levings Lake Dam Winnebago County | 23 | 1935 | High | Not Available |
| Lewis Dam McDonough County | 28 | — | Low | Not Available |
| Lewis Industrial Park Detention Dam Jefferson County | 12 | 1999 | Low | Not Available |
| Libbys Lagoon 2 Dam Tazewell County | 13 | 1969 | Low | Not Available |
| Libbys Lagoon 4 Dam Tazewell County | 28 | 1974 | Low | Not Available |
| Liberty Land/John Ross Plant/Sediment Pond Dams Franklin County | 20 | 1988 | Low | Not Available |
| Liberty Land/Mine 24/Freshwater Lake Dam Franklin County | 20 | 1996 | Low | Not Available |
| Liberty Land/Mine 24/North Pond Dam Franklin County | 24 | 1982 | Low | Not Available |
| Liberty Land/Mine 24/Slurry Cell 2 Dam Franklin County | 55 | 1988 | Low | Not Available |
| Liberty Land/Mine 26/Slurry Cell 3 Dam Franklin County | 40 | 1987 | Significant | Not Available |
| Liberty Land/Mine 26/Slurry Cell 4 Dam Franklin County | 56 | 1997 | Low | Not Available |
| Lily Cache Business Dam Will County | 14 | — | Low | Not Available |
| Limkemann Pond Dam Hancock County | 28 | 1975 | Low | 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 Cache Creek No. 1 Johnson County | 58 | 1974 | Significant | Not Rated |
| Little Cache Structure 10 Dam Johnson County | 36 | 1969 | Low | Not Available |
| Little Cache Structure 5 Dam Johnson County | 31 | 1973 | Low | Not Available |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.