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 1,008
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Shady Eighty Acres Lake Dam Greene County | 17 | 1966 | Low | Not Available |
| Shad Lake Dam Macoupin County | 20 | 1950 | Low | Not Available |
| Shabbona Lake Dam DeKalb County | 56 | 1974 | Low | Not Available |
| Settling Pond Macoupin County | 25 | — | Low | Not Available |
| Settlers Ridge Pond 1 Dam Kane County | 9 | 2006 | Low | Not Available |
| Sesser Reservoir Dam Franklin County | 15 | 1914 | Low | Not Available |
| Sears Lake Dam McLean County | 31 | 1971 | Low | Not Available |
| Sears Dam Rock Island County | 16 | 1912 | Low | Not Available |
| SCS Pond 22 Dam Henderson County | 20 | 1954 | Low | Not Available |
| Scott Air Force Base Pond Dam St. Clair County | 13 | 1961 | Low | Not Available |
| Schwebel Brothers Dam St. Clair County | 11 | 1919 | Low | Not Available |
| Schon Park Dam Madison County | 25 | 2013 | Low | Not Available |
| Schneider Pond Dam 1 Washington County | 23 | 1968 | Low | Not Available |
| Schmidgall Dam 1 Sangamon County | 30 | 1977 | Low | Not Available |
| Schlipf Lake Dam Woodford County | 31 | 1945 | Low | Not Available |
| Scheuermann Lake Dam Adams County | 26 | 1965 | Low | Not Available |
| Schaffner Lake 1 Dam Randolph County | 13 | 1954 | Low | Not Available |
| Sauk Trail Lake Dam Cook County | 18 | 1923 | Low | Not Available |
| Sampsons Lake Dam Montgomery County | 32 | 1970 | Low | Not Available |
| Salem Township Road 343 Dam Knox County | 48 | 1997 | Low | Not Available |
| Saganashkee Slough 7 Dam Cook County | 9 | 1948 | Low | Not Available |
| Saganashkee Slough 2 Dam Cook County | 8 | 1948 | Low | Not Available |
| Saddlewood Estates Dam LaSalle County | 20 | 1991 | Low | Not Available |
| Sacome Pond Dam Christian County | 25 | 1963 | Low | Not Available |
| Roy Demanes Pond Dam Peoria County | 44 | 1975 | Low | Not Available |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.