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 101–125 of 360
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Rayburn Lake Dam Madison County | 27 | 1968 | Significant | Not Available |
| Raw Water Reservoir Dam Jefferson County | 20 | 1966 | Significant | Not Available |
| Ravenwood Lake Dam St. Clair County | 15 | 1990 | Significant | Not Available |
| Randolph County Lake Dam Randolph County | 47 | 1960 | Significant | Not Available |
| Putnam County Conservation District Dam Putnam County | 45 | 1993 | Significant | Not Available |
| Prescott Mill Dam Kendall County | 7 | 2006 | Significant | Not Available |
| Prairie Grass Boulevard Dam Will County | 6 | — | Significant | Not Available |
| Powerton Station Former Ash Basin Tazewell County | 30 | 1980 | Significant | Not Available |
| Powerton Cooling Lake Dam Tazewell County | 26 | 1970 | Significant | Not Available |
| Pounds Hollow Gallatin County | 43 | 1939 | Significant | Fair |
| Pont-Ca Lake Dam White County | 20 | 1949 | Significant | Not Available |
| Pine Lake Dam Madison County | 20 | 1908 | Significant | Not Available |
| Pinckneyville Reservoir Dam Perry County | 45 | 1953 | Significant | Not Available |
| Pilcher Park Dam Will County | — | — | Significant | Not Available |
| Peoria Lock and Dam Tazewell County | 23 | 1939 | Significant | Not Available |
| Pearl City Lagoon Dam Stephenson County | 11 | 1970 | Significant | Not Available |
| Peabody/Pond Dam Gallatin County | 21 | 1969 | Significant | Not Available |
| Peabody/Fresh Water Lake Dam Gallatin County | 12 | 1969 | Significant | Not Available |
| Peabody/Eagle 2/Lake Dam Gallatin County | 21 | 1969 | Significant | Not Available |
| Patterson Lake Dam Clay County | 31 | 1926 | Significant | Not Available |
| Papoose Lake Dam Cook County | 12 | 1956 | Significant | Not Available |
| Palmyra-Modesto City Lake Dam Macoupin County | 50 | 1965 | Significant | Not Available |
| Otter Lake Dam Macoupin County | 71 | 1969 | Significant | Not Available |
| Osage Lake Dam Macoupin County | 38 | — | Significant | Not Available |
| One Horse Gap Pope County | 36 | 1973 | Significant | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.