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 926–950 of 1,630
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Marlow Pond Dam Marion County | 28 | 1950 | Low | Not Available |
| Marseilles Lock and Dam LaSalle County | 58 | 1933 | Significant | Not Available |
| Marseilles Power Canal Dam LaSalle County | 15 | 1911 | Low | Not Available |
| Marsh A Dam Kane County | 35 | 1951 | Low | Not Available |
| Marshall Golf Course Lake Dam Clark County | 39 | 1940 | Significant | Not Available |
| Marsh Lake Dam Stark County | 30 | 1965 | Low | Not Available |
| Martel Lake Dam Williamson County | 20 | 1974 | Low | Not Available |
| Martin Family Dam Jefferson County | 21 | — | Low | Not Available |
| Martinsville Pond Dam Clark County | 6 | 1910 | Significant | Not Available |
| Martin Tarbel Lake Dam Clark County | 23 | 1954 | Low | Not Available |
| Matherville Lagoons Dam Mercer County | 9 | — | Significant | Not Available |
| Mathews Pond Dam 2 Montgomery County | 23 | 1974 | Low | Not Available |
| Matthews Pond 1 Montgomery County | 25 | 1969 | Low | Not Available |
| Matway Pond Dam 1 Montgomery County | 25 | 1965 | Low | Not Available |
| Maupin Lake Dam Bureau County | 24 | 1965 | Low | Not Available |
| Mauvaise Terre Lake Dam Morgan County | 30 | 1923 | High | Not Available |
| Mayfair Reservoir Dam Cook County | 9 | 1977 | Low | Not Available |
| Mcadams Pond Dam 1 Macoupin County | 30 | 1977 | Low | Not Available |
| McCann Lake Dam Ogle County | 13 | — | Low | Not Available |
| Mccaw Pond Dam Mercer County | 38 | 1952 | Low | Not Available |
| Mcclure East Pond Dam McDonough County | 30 | 1940 | Significant | Not Available |
| Mccormick Pond Dam Schuyler County | 27 | 1958 | Low | Not Available |
| Mcgraw Lake Dam St. Clair County | 12 | 1927 | Low | Not Available |
| Mclaughlin Pond Dam Rock Island County | 43 | 1972 | Low | Not Available |
| Mcleansboro Lake Dam Hamilton County | 36 | 1937 | High | Not Available |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.