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 1151–1175 of 1,630
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Pitts Pond Dam 1 Macoupin County | 27 | 1961 | Low | Not Available |
| Pleasant Valley Lake Dam Williamson County | 21 | 1958 | Low | Not Available |
| Plum Creek Golf Course Lake Dam Scott County | 29 | 1994 | Low | Not Available |
| Pollards Pond Dam White County | 26 | 1974 | Low | Not Available |
| Pond 2a Dam Lake County | 8 | — | Low | Not Available |
| Pont-Ca Lake Dam White County | 20 | 1949 | Significant | Not Available |
| Potters Pond Dam Saline County | 22 | 1972 | Low | Not Available |
| Potthast Lake Dam Bond County | 15 | 1974 | Low | Not Available |
| Pounds Hollow Gallatin County | 43 | 1939 | Significant | Fair |
| Powerton Cooling Lake Dam Tazewell County | 26 | 1970 | Significant | Not Available |
| Powerton Station Former Ash Basin Tazewell County | 30 | 1980 | Significant | Not Available |
| Prairie Coal/Lost Prairie Mine/Sediment Pond 1 Perry County | 28 | — | Low | Not Available |
| Prairie Coal/Lost Prairie Mine/Slurry Pond 1 Perry County | 33 | — | Low | Not Available |
| Prairie Grass Boulevard Dam Will County | 6 | — | Significant | Not Available |
| Prairie Lake Dam Cass County | 68 | 1999 | High | Not Available |
| Prairie State Energy Raw Water Dam Washington County | 40 | 2010 | High | Not Available |
| Pratt Bros.Pond Dam Macoupin County | 27 | 1977 | Low | Not Available |
| Pratt Pond Dam Fulton County | 26 | 1978 | Low | Not Available |
| Pregler Pond Dam Greene County | 30 | 1961 | Undetermined | Not Available |
| Premium Outlets Boulevard Dam Kane County | 10 | — | Low | Not Available |
| Prescott Mill Dam Kendall County | 7 | 2006 | Significant | Not Available |
| Putnam County Conservation District Dam Putnam County | 45 | 1993 | Significant | Not Available |
| Puzey Lake Dam Vermilion County | 25 | 1972 | Low | Not Available |
| Quiver Creek Weir Dam Mason County | 17 | 1988 | Low | Fair |
| Raccoon Lake Dam Marion County | 29 | 1943 | High | Not Available |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.