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 1326–1350 of 1,630
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| South Side Detention Basin Berm 2 Dam Coles County | 14 | 2011 | Low | Not Available |
| South Side Detention Basin Berm 3 Dam Coles County | 13 | 2011 | Low | Not Available |
| South Warner Pond Dam Peoria County | 25 | 1957 | Low | Not Available |
| Spaniel Lake Dam Will County | 12 | — | High | Not Available |
| Sparta New City Reservoir Dam Randolph County | 16 | 1952 | Significant | Not Available |
| Sparta Old City Reservoir Dam Randolph County | 21 | 1917 | Significant | Not Available |
| Spaulding Dam Sangamon County | 48 | 1933 | High | Not Available |
| Spin Lake Dam McLean County | 48 | 1967 | Low | Not Available |
| Spoon Lake Dam Knox County | 74 | 1971 | High | Not Available |
| Sportsman Lake Dam Marion County | 17 | 1957 | Low | Not Available |
| Sportsman Lake Dam Clinton County | 23 | 1954 | Low | Not Available |
| Spring Arbor Lake Dam Jackson County | 55 | 1972 | High | Not Available |
| Spring Brook Gabion Dam DuPage County | 9 | 1984 | Low | Not Available |
| Springfield Coal/Industry/3s McDonough County | 59 | 1984 | Low | Not Available |
| Springfield Coal/Industry/Incline Pond 12 Dams McDonough County | 34 | 1997 | Low | Not Available |
| Springfield Coal/Industry/Pond 18 Dam McDonough County | 39 | 1993 | Low | Not Available |
| Springfield Coal/Industry/Pond 20 Dam McDonough County | 29 | 1994 | Low | Not Available |
| Springfield Coal/Industry/Pond 21 Dam McDonough County | 28 | 1997 | Low | Not Available |
| Springfield Coal/Industry/Pond 22 Dam McDonough County | 25 | 1997 | Low | Not Available |
| Springfield Coal/Industry/Pond 26 Dam Schuyler County | 33 | 2000 | Low | Not Available |
| Springfield Coal/Industry/Pond 27 Dam Schuyler County | 31 | 2000 | Low | Not Available |
| Springfield Coal/Industry/Pond 29 Dam Schuyler County | 30 | — | Low | Not Available |
| Springfield Coal/Industry/Pond 2 Dam McDonough County | 46 | 1983 | Low | Not Available |
| Springfield Coal/Industry/Pond 30 Dam Schuyler County | 36 | — | Low | Not Available |
| Springfield Coal/Industry/Pond 31 Dam McDonough County | 34 | — | Low | Not Available |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.