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 776–800 of 1,008
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Sears Dam Rock Island County | 16 | 1912 | Low | Not Available |
| Sears Lake Dam McLean County | 31 | 1971 | Low | Not Available |
| Sesser Reservoir Dam Franklin County | 15 | 1914 | Low | Not Available |
| Settlers Ridge Pond 1 Dam Kane County | 9 | 2006 | Low | Not Available |
| Settling Pond Macoupin County | 25 | — | Low | Not Available |
| Shabbona Lake Dam DeKalb County | 56 | 1974 | Low | Not Available |
| Shad Lake Dam Macoupin County | 20 | 1950 | Low | Not Available |
| Shady Eighty Acres Lake Dam Greene County | 17 | 1966 | Low | Not Available |
| Shale Lake Dam Madison County | 32 | 1988 | Low | Not Available |
| Shaufler Pond Dam Randolph County | 19 | 1960 | Low | Not Available |
| Shebb Oaks Lake Dam Knox County | 27 | 1957 | Low | Not Available |
| Shelbyville Dam - Wood Dam Moultrie County | 28 | 1970 | Low | Not Available |
| Shepherd Pond Dam Tazewell County | 29 | 1957 | Low | Not Available |
| Sherwood Lake Subdivision Dam McLean County | 21 | 2002 | Low | Not Available |
| Shoal Creek Structure 14 Dam Montgomery County | 34 | 1971 | Low | Not Available |
| Shoemakers Pond Dam Effingham County | 26 | 1965 | Low | Not Available |
| Shullock Lake Dam Edgar County | 28 | 1955 | Low | Not Available |
| Sill Lake Dam Adams County | 25 | 1951 | Low | Not Available |
| Siloam Springs Lake Dam Adams County | 55 | 1955 | Low | Not Available |
| Silver Bay LLC Lake Dam St. Clair County | 67 | 1991 | Low | Not Available |
| Silver Lake Dam McHenry County | 23 | 1929 | Low | Not Available |
| Simpson Pond Dam Randolph County | 26 | 1973 | Low | Not Available |
| Sims Pond Dam Adams County | 25 | 1960 | Low | Not Available |
| Sipc/Southern Delta/Freshwater Impoundment Dam Saline County | 26 | 1976 | Low | Not Available |
| Sipc/Southern Delta/Slurry Impoundment Dam Saline County | 34 | 1976 | Low | Not Available |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.