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 201–225 of 360
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Marseilles Lock and Dam LaSalle County | 58 | 1933 | Significant | Not Available |
| Marshall Golf Course Lake Dam Clark County | 39 | 1940 | Significant | Not Available |
| Martinsville Pond Dam Clark County | 6 | 1910 | Significant | Not Available |
| Matherville Lagoons Dam Mercer County | 9 | — | Significant | Not Available |
| Mcclure East Pond Dam McDonough County | 30 | 1940 | Significant | Not Available |
| Melvin Price Locks and Dam St. Charles County | 77 | 1990 | Significant | Not Available |
| Mesa Lake Dam Wabash County | 26 | 1968 | Significant | Not Available |
| Mill Creek Structure 1 Dam Clark County | 81 | 1980 | Significant | Not Available |
| Mill Creek Structure 3 Dam Clark County | 38 | 1976 | Significant | Not Available |
| Millers Campground Lake Dam Perry County | 20 | — | Significant | Not Available |
| Mississippi River Lock and Dam 19 Lee County | 63 | 1913 | Significant | Not Available |
| Monee Reservoir Dam Will County | 29 | 1900 | Significant | Not Available |
| Montgomery Dam Kane County | 7 | 1969 | Significant | Not Available |
| Mooseheart Lake Dam Kane County | 15 | 1914 | Significant | Not Available |
| Morrison Lake Dam Mercer County | 33 | 1965 | Significant | Not Available |
| Morrison Wwtp Excess Flow Storage Pond Dam Whiteside County | 8 | — | Significant | Not Available |
| Msdgc Sludge Pond 1-3a Dam Fulton County | 39 | 1973 | Significant | Not Available |
| Murrayville Woodson Lake Dam Morgan County | 28 | 1963 | Significant | Not Available |
| Myers Ranch Farms Pond Dam Union County | 38 | 1997 | Significant | Not Available |
| National Petroleum Chemical Plant Lake Dam Douglas County | 21 | 1952 | Significant | Not Available |
| New Cherry Lake Dam Perry County | 22 | 1969 | Significant | Not Available |
| New Gillespie Lake Dam Macoupin County | 41 | 1956 | Significant | Not Available |
| New Harrisburg Reservoir Dam Saline County | 38 | 1955 | Significant | Not Available |
| Newton Power Station Lake Dam Jasper County | 54 | 1975 | Significant | Not Available |
| Newton Station Ash Pond Jasper County | 22 | — | Significant | Not Available |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.