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 976–1000 of 1,630
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Mill Creek Structure 6 Dam Clark County | 34 | 1976 | Low | Not Available |
| Mill Creek Structure 7 Dam Clark County | 42 | 1976 | Low | Not Available |
| Mill Creek Structure 8 Dam Clark County | 40 | 1987 | Low | Not Available |
| Mill Creek Structure 9 Dam Clark County | 46 | 1986 | Low | Not Available |
| Mill Creek Water Reclamation District Dam Kane County | 9 | 1995 | High | Not Available |
| Mill Creek WS Str 4 Clark County | 35 | 1976 | Low | Not Available |
| Millenium Parkway Dam Will County | 10 | 2003 | Low | Not Available |
| Miller Lake Dam Jefferson County | 40 | 1947 | High | Not Available |
| Miller Lake Dam Coles County | 32 | 1950 | Low | Not Available |
| Miller Park Lake Dam McLean County | 33 | 1928 | High | Not Available |
| Miller Pond Dam 1 Macoupin County | 30 | 1977 | Low | Not Available |
| Miller Pond Dam 2 Macoupin County | 28 | 1973 | Low | Not Available |
| Millers Campground Lake Dam Perry County | 20 | — | Significant | Not Available |
| Millers Lake Dam Richland County | 20 | 1952 | Low | Not Available |
| Millstadt Sportsman Club Lake Dam St. Clair County | 15 | 1951 | Low | Not Available |
| Milne Creek Weir Dam Will County | 7 | — | Low | Not Available |
| Milner Lake Dam Wayne County | 13 | 1954 | Low | Not Available |
| Minooka Ridge Business Center Temp Detention Dam Kendall County | 14 | — | Low | Not Available |
| Mirror Lake Dam Franklin County | 13 | 2001 | Low | Not Available |
| Mississippi River Lock and Dam 19 Lee County | 63 | 1913 | Significant | Not Available |
| Mitchell Lake Dam Tazewell County | 58 | 1959 | Low | Not Available |
| Mitch King Dam Macoupin County | 40 | — | Low | Not Available |
| Moline Power Rock Island County | 31 | 1896 | Low | Fair |
| Monee Reservoir Dam Will County | 29 | 1900 | Significant | Not Available |
| Monroe Street Dam Macon County | 16 | 1991 | Low | Not Available |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.