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 151–175 of 360
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Millers Campground Lake Dam Perry County | 20 | — | Significant | Not Available |
| Mill Creek Structure 3 Dam Clark County | 38 | 1976 | Significant | Not Available |
| Mill Creek Structure 1 Dam Clark County | 81 | 1980 | Significant | Not Available |
| Mesa Lake Dam Wabash County | 26 | 1968 | Significant | Not Available |
| Melvin Price Locks and Dam St. Charles County | 77 | 1990 | Significant | Not Available |
| Mcclure East Pond Dam McDonough County | 30 | 1940 | Significant | Not Available |
| Matherville Lagoons Dam Mercer County | 9 | — | Significant | Not Available |
| Martinsville Pond Dam Clark County | 6 | 1910 | Significant | Not Available |
| Marshall Golf Course Lake Dam Clark County | 39 | 1940 | Significant | Not Available |
| Marseilles Lock and Dam LaSalle County | 58 | 1933 | Significant | Not Available |
| Marissa WWTP Basin Dam St. Clair County | — | — | Significant | Not Available |
| Marissa Reservoir Dam St. Clair County | 22 | 1938 | Significant | Not Available |
| Marissa Recreation Association South Lake Dam St. Clair County | 32 | 1954 | Significant | Not Available |
| Marissa Recreation Association North Lake Dam St. Clair County | 27 | 1954 | Significant | Not Available |
| Marion Reservoir Dam Williamson County | 25 | 1971 | Significant | Not Available |
| Marion Prison Lake Dam Williamson County | 26 | 1991 | Significant | Not Available |
| Marine Lake Dam Madison County | 22 | — | Significant | Not Available |
| Maple Lake Dam Cook County | 25 | 1918 | Significant | Not Available |
| Main Street Triangle Dam Cook County | 9 | — | Significant | Not Available |
| Lucinda Lake Dam Adams County | 25 | 2000 | Significant | Not Available |
| Lower Batavia Dam Kane County | 5 | 1916 | Significant | Not Available |
| Loch Lomond Dam Lake County | 14 | 1958 | Significant | Not Available |
| Little Rocky Run Lake Dam Hancock County | 64 | 1971 | Significant | Not Available |
| Little Cache Structure 8 Dam Johnson County | 21 | 1970 | Significant | Not Available |
| Little Cache Creek No. 1 Johnson County | 58 | 1974 | Significant | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.