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 226–250 of 360
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| June Lake Dam Effingham County | 20 | — | Significant | Not Available |
| Jordan Lake Dam Richland County | 25 | 1950 | Significant | Not Available |
| Joppa Station East Ash Pond Massac County | 26 | — | Significant | Not Available |
| Jones Lake Dam Macoupin County | 36 | 1970 | Significant | Not Available |
| Joliet Junior College Lake Dam Will County | 11 | 1980 | Significant | Not Available |
| Johnston City Sewage Lagoon Dam Williamson County | 12 | 1963 | Significant | Not Available |
| Johnston City Lake Dam Williamson County | 14 | 1921 | Significant | Not Available |
| Jerry F. Costello Lock and Dam Randolph County | 81 | 1974 | Significant | Not Available |
| International Center South Dam Grundy County | 7 | 2004 | Significant | Not Available |
| Inez Lake Dam St. Clair County | 23 | — | Significant | Not Available |
| Illinois Coal Recovery/Mine 21/Reservoir Dam Franklin County | 21 | 1960 | Significant | Not Available |
| Illinois Central Reservoir Dam Jefferson County | 15 | 1926 | Significant | Not Available |
| Illinois Central Railroad Reservoir Dam Washington County | 24 | 1930 | Significant | Not Available |
| Hutsonville Fly Ash Pond D Dam Crawford County | 12 | 1969 | Significant | Not Available |
| Holiday Shores Lake Dam Madison County | 47 | 1965 | Significant | Not Available |
| Hobson Road Dam DuPage County | 20 | 1991 | Significant | Not Available |
| Hidden Valley Lake Dam Ogle County | 16 | 1968 | Significant | Not Available |
| Heuerman Pond Dam Peoria County | — | 1974 | Significant | Not Available |
| Herrin Reservoir 2 Dam Williamson County | 27 | 1926 | Significant | Not Available |
| Herrin Reservoir 1 Dam Williamson County | 6 | 1915 | Significant | Not Available |
| Heritage Lake Dam Tazewell County | 56 | 1968 | Significant | Not Available |
| Hennepin Station West Ash Pond Dam Putnam County | — | — | Significant | Not Available |
| Hennepin Ash Pond 2 Dam Putnam County | 52 | — | Significant | Not Available |
| Heitmans East Pond Dam St. Clair County | 30 | 1974 | Significant | Not Available |
| Hecks Lake Dam Marion County | 18 | 1959 | Significant | Not Available |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.