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 1051–1075 of 1,630
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Herrin Reservoir 2 Dam Williamson County | 27 | 1926 | Significant | Not Available |
| Herrin Reservoir 1 Dam Williamson County | 6 | 1915 | Significant | Not Available |
| Heritage Lake Dam Tazewell County | 56 | 1968 | Significant | Not Available |
| Hennepin Station West Ash Pond Dam Putnam County | — | — | Significant | Not Available |
| Hennepin Station East Ash Pond Putnam County | 26 | 1996 | Low | Not Available |
| Hennepin Ash Pond 2 Dam Putnam County | 52 | — | Significant | Not Available |
| Heller Lake Dam Fulton County | 22 | 1965 | Low | Not Available |
| Heitmans West Pond 2 Dam St. Clair County | 30 | 1990 | High | Not Available |
| Heitmans East Pond Dam St. Clair County | 30 | 1974 | Significant | Not Available |
| Heild Pond Dam Jersey County | 19 | 1975 | Low | Not Available |
| Heenren Pond Dam Montgomery County | 23 | 1970 | Low | Not Available |
| Hecks Lake Dam Marion County | 18 | 1959 | Significant | Not Available |
| Heartland Oaks 2 Dam St. Clair County | 15 | — | Low | Not Available |
| Heartland Oaks 1 Dam St. Clair County | 29 | — | Low | Not Available |
| Hayes Pond Dam Coles County | 26 | 1968 | Low | Not Available |
| Hawthorn Woods Country Club Wwtp Dam Lake County | 17 | 2006 | Low | Not Available |
| Hawthorn Parkway Dam Lake County | 9 | 2001 | High | Not Available |
| Hawthorne Hills Lake Dam Jefferson County | 18 | 1969 | Significant | Not Available |
| Hawthorne Hills Dam Madison County | 21 | — | High | Not Available |
| Hatchery Lake Dam Kane County | 25 | 1938 | Low | Not Available |
| Hastie Mining//Tailings Pond 2-3 Dam Hardin County | 41 | — | Low | Not Available |
| Hastie Mining//Pond 1-Clarification Pond Dam Hardin County | 49 | 2000 | Low | Not Available |
| Hartsook Pond Dam 1 Macoupin County | 30 | 1977 | Low | Not Available |
| Harry Mullens Pond Dam 1 Macoupin County | 32 | 1977 | Low | Not Available |
| Harrison Park West Detention Dam Winnebago County | 15 | — | Significant | Not Available |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.