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 251
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Tailing Pond 127 Dam Ogle County | 38 | 1991 | High | Not Available |
| Thomas J. O'Brien Lock and Controlling Works Cook County | 37 | 1960 | High | Not Available |
| Thorton Quarry Gap Dam Cook County | 116 | 2013 | High | Not Available |
| Tiskilwa Structure 1 Dam Bureau County | 49 | 1960 | High | Not Available |
| Tiskilwa Structure 4 Dam Bureau County | 59 | 1960 | High | Not Available |
| Tiskilwa Structure 5 Dam Bureau County | 60 | 1960 | High | Not Available |
| Tiskilwa Strucure 2 Dam Bureau County | 61 | 1960 | High | Not Available |
| Tom Steele Dam Rock Island County | 59 | 2005 | High | Not Available |
| Trautman Lake Dam Champaign County | 20 | 1965 | High | Not Available |
| Treasure Lake Dam Adams County | 15 | 1989 | High | Not Available |
| Tullamore Dam Lake County | 17 | 1994 | High | Not Available |
| Upper Salt Creek Structure 2 Dam Cook County | 23 | 1984 | High | Not Available |
| Upper Salt Creek Structure 3 Dam Cook County | 26 | 1985 | High | Not Available |
| Upper Salt Creek Structure 4 Dam Cook County | 14 | 1987 | High | Not Available |
| Valier Lake Dam Franklin County | 21 | 1905 | High | Not Available |
| Vandalia Municipal Reservoir Dam Fayette County | 50 | 1965 | High | Not Available |
| Vanwinkle Lake Dam Fulton County | 20 | 1900 | High | Not Available |
| West Frankfort New City Lake Dam Franklin County | 25 | 1945 | High | Not Available |
| West Lake Dam Kane County | 35 | 1951 | High | Not Available |
| Wildwood Lake Dam Marshall County | 84 | 1969 | High | Not Available |
| Williamson Energy/Pond Creek Mine/Refuse Disposal Facility Williamson County | 88 | — | High | Not Available |
| Willow Lake Dam Stephenson County | 25 | 1974 | High | Not Available |
| Wonder Lake Dam McHenry County | 27 | 1929 | High | Not Available |
| Wonder Lake Sediment Dewatering Facility Dam McHenry County | 22 | 2014 | High | Not Available |
| Woodfield Lake Estates Dam St. Clair County | 15 | 2006 | High | Not Available |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.