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 |
|---|---|---|---|---|
| Nokomis Sportsmans Club Lake Dam Montgomery County | 23 | 1970 | Significant | Not Available |
| Norris Lake Dam Henderson County | 21 | 1948 | Significant | Not Available |
| North Aurora Dam Kane County | 6 | 1974 | Significant | Not Available |
| Oakland Lake Dam Coles County | 18 | 1937 | Significant | Not Available |
| Oakwood Country Club Lake Dam Henry County | 25 | 1964 | Significant | Not Available |
| Oakwood Drive Dam Tazewell County | 23 | 1950 | Significant | Not Available |
| Old Mt. Olive City Lake Dam Macoupin County | 37 | 1900 | Significant | Not Available |
| Old Tom Creek WS Str 29 Henderson County | 22 | 1956 | Significant | Not Available |
| Olmsted Locks and Dam Ballard County | 67 | 2018 | Significant | Not Available |
| Omaha Township Civic Center Dam Gallatin County | 18 | 1980 | Significant | Not Available |
| One Horse Gap Pope County | 36 | 1973 | Significant | Fair |
| Osage Lake Dam Macoupin County | 38 | — | Significant | Not Available |
| Otter Lake Dam Macoupin County | 71 | 1969 | Significant | Not Available |
| Palmyra-Modesto City Lake Dam Macoupin County | 50 | 1965 | Significant | Not Available |
| Papoose Lake Dam Cook County | 12 | 1956 | Significant | Not Available |
| Patterson Lake Dam Clay County | 31 | 1926 | Significant | Not Available |
| Peabody/Eagle 2/Lake Dam Gallatin County | 21 | 1969 | Significant | Not Available |
| Peabody/Fresh Water Lake Dam Gallatin County | 12 | 1969 | Significant | Not Available |
| Peabody/Pond Dam Gallatin County | 21 | 1969 | Significant | Not Available |
| Pearl City Lagoon Dam Stephenson County | 11 | 1970 | Significant | Not Available |
| Peoria Lock and Dam Tazewell County | 23 | 1939 | Significant | Not Available |
| Pilcher Park Dam Will County | — | — | Significant | Not Available |
| Pinckneyville Reservoir Dam Perry County | 45 | 1953 | Significant | Not Available |
| Pine Lake Dam Madison County | 20 | 1908 | Significant | Not Available |
| Pont-Ca Lake Dam White County | 20 | 1949 | Significant | Not Available |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.