Dams in Illinois
1,634
Total Dams
249
High Hazard
15.24%
% High Hazard
60.9 yrs
Average Age
Counties
| County | Dams | High Hazard | % High | Avg Age |
|---|---|---|---|---|
| St. Clair | 60 | 16 | 26.67% | 64.4 yrs |
| Cook | 44 | 14 | 31.82% | 59.2 yrs |
| Madison | 63 | 12 | 19.05% | 60.3 yrs |
| Lake | 28 | 10 | 35.71% | 62.7 yrs |
| Montgomery | 49 | 8 | 16.33% | 60.3 yrs |
| Macoupin | 97 | 8 | 8.25% | 64.4 yrs |
| Jackson | 23 | 7 | 30.43% | 58.7 yrs |
| LaSalle | 18 | 7 | 38.89% | 66.3 yrs |
| Kane | 37 | 7 | 18.92% | 70.9 yrs |
| Winnebago | 18 | 7 | 38.89% | 61.7 yrs |
| Will | 38 | 7 | 18.42% | 49.7 yrs |
| Peoria | 49 | 7 | 14.29% | 56.3 yrs |
| Williamson | 30 | 6 | 20.00% | 67.0 yrs |
| Franklin | 33 | 6 | 18.18% | 68.7 yrs |
| Bureau | 14 | 6 | 42.86% | 60.6 yrs |
| DuPage | 30 | 6 | 20.00% | 39.8 yrs |
| Tazewell | 43 | 5 | 11.63% | 62.0 yrs |
| Knox | 24 | 4 | 16.67% | 69.0 yrs |
| Schuyler | 30 | 4 | 13.33% | 53.9 yrs |
| McLean | 16 | 4 | 25.00% | 50.4 yrs |
| Adams | 25 | 4 | 16.00% | 55.6 yrs |
| Fulton | 56 | 4 | 7.14% | 63.7 yrs |
| Hamilton | 13 | 4 | 30.77% | 53.0 yrs |
| Monroe | 23 | 4 | 17.39% | 60.1 yrs |
| Jefferson | 28 | 4 | 14.29% | 56.0 yrs |
| Christian | 15 | 4 | 26.67% | 55.1 yrs |
| Clinton | 14 | 3 | 21.43% | 52.5 yrs |
| Sangamon | 18 | 3 | 16.67% | 51.6 yrs |
| Union | 8 | 3 | 37.50% | 62.7 yrs |
| Mason | 9 | 3 | 33.33% | 46.6 yrs |
| Marion | 20 | 3 | 15.00% | 80.0 yrs |
| McHenry | 20 | 3 | 15.00% | 63.0 yrs |
| DeKalb | 8 | 3 | 37.50% | 32.6 yrs |
| Jo Daviess | 7 | 2 | 28.57% | 45.4 yrs |
| Randolph | 26 | 2 | 7.69% | 63.0 yrs |
| Coles | 15 | 2 | 13.33% | 53.9 yrs |
| Richland | 10 | 2 | 20.00% | 72.2 yrs |
| White | 7 | 2 | 28.57% | 71.0 yrs |
| Shelby | 7 | 2 | 28.57% | 68.0 yrs |
| Ogle | 9 | 2 | 22.22% | 53.9 yrs |
| Cass | 6 | 2 | 33.33% | 49.2 yrs |
| Macon | 5 | 2 | 40.00% | 63.3 yrs |
| Marshall | 4 | 2 | 50.00% | 61.0 yrs |
| Rock Island | 12 | 2 | 16.67% | 76.4 yrs |
| Saline | 24 | 2 | 8.33% | 49.8 yrs |
| Logan | 4 | 2 | 50.00% | 46.7 yrs |
| Washington | 13 | 2 | 15.38% | 66.3 yrs |
| Stephenson | 4 | 2 | 50.00% | 58.8 yrs |
| Cumberland | 4 | 1 | 25.00% | 86.5 yrs |
| Pike | 11 | 1 | 9.09% | 59.1 yrs |
| Alexander | 3 | 1 | 33.33% | 40.0 yrs |
| Jersey | 31 | 1 | 3.23% | 61.0 yrs |
| Champaign | 7 | 1 | 14.29% | 59.0 yrs |
| Carroll | 6 | 1 | 16.67% | 45.4 yrs |
| Morgan | 27 | 1 | 3.70% | 63.1 yrs |
| Lee | 7 | 1 | 14.29% | 63.6 yrs |
| Clark | 20 | 1 | 5.00% | 64.2 yrs |
| Putnam | 7 | 1 | 14.29% | 45.8 yrs |
| Hancock | 13 | 1 | 7.69% | 66.8 yrs |
| Woodford | 10 | 1 | 10.00% | 64.7 yrs |
| De Witt | 7 | 1 | 14.29% | 65.9 yrs |
| Whiteside | 6 | 1 | 16.67% | 69.2 yrs |
| Menard | 4 | 1 | 25.00% | 56.0 yrs |
| Fayette | 13 | 1 | 7.69% | 79.2 yrs |
| Crawford | 11 | 1 | 9.09% | 63.7 yrs |
| Henry | 11 | 1 | 9.09% | 67.8 yrs |
| Grundy | 6 | 1 | 16.67% | 47.8 yrs |
| Vermilion | 9 | 1 | 11.11% | 61.0 yrs |
| McDonough | 29 | 1 | 3.45% | 52.1 yrs |
| Hardin | 6 | 0 | 0.00% | 50.4 yrs |
| Johnson | 18 | 0 | 0.00% | 55.2 yrs |
| Brown | 16 | 0 | 0.00% | 63.1 yrs |
| Edwards | 6 | 0 | 0.00% | 61.2 yrs |
| Clay | 6 | 0 | 0.00% | 76.2 yrs |
| Pulaski | 4 | 0 | 0.00% | 55.0 yrs |
| Pope | 5 | 0 | 0.00% | 61.6 yrs |
| Henderson | 9 | 0 | 0.00% | 70.8 yrs |
| Wayne | 11 | 0 | 0.00% | 53.7 yrs |
| Edgar | 6 | 0 | 0.00% | 66.2 yrs |
| Greene | 20 | 0 | 0.00% | 63.8 yrs |
| Iroquois | 4 | 0 | 0.00% | 63.5 yrs |
| Jasper | 8 | 0 | 0.00% | 53.9 yrs |
| Effingham | 10 | 0 | 0.00% | 77.0 yrs |
| Bond | 13 | 0 | 0.00% | 61.9 yrs |
| Stark | 4 | 0 | 0.00% | 64.8 yrs |
| Livingston | 6 | 0 | 0.00% | 52.0 yrs |
| Massac | 4 | 0 | 0.00% | 68.3 yrs |
| Perry | 11 | 0 | 0.00% | 59.7 yrs |
| Moultrie | 5 | 0 | 0.00% | 58.4 yrs |
| Gallatin | 10 | 0 | 0.00% | 58.9 yrs |
| Mercer | 13 | 0 | 0.00% | 63.5 yrs |
| Kendall | 7 | 0 | 0.00% | 41.8 yrs |
| Warren | 13 | 0 | 0.00% | 68.5 yrs |
| Douglas | 4 | 0 | 0.00% | 64.0 yrs |
| Scott | 3 | 0 | 0.00% | 49.3 yrs |
| Wabash | 5 | 0 | 0.00% | 64.5 yrs |
Purpose Breakdown
Tallest Dams in Illinois
| Dam Name | Height | County | Hazard |
|---|---|---|---|
| Refuse Disposal Area | 175 ft | Saline | Significant Hazard |
| Duck Creek Station Dams | 123 ft | Fulton | High Hazard |
| Sugar Camp/Mine 1/North Refuse Disposal Facility Dam | 117 ft | Franklin | High Hazard |
| Macoupin Energy Refuse Disposal Area 6 | 117 ft | Macoupin | High Hazard |
| Thorton Quarry Gap Dam | 116 ft | Cook | High Hazard |
| American Coal/Galatia/Bunkhouse Rdf Dam | 110 ft | Saline | High Hazard |
| International Coal/Viper/Slurry Impoundment | 109 ft | Logan | High Hazard |
| Shelbyville Dam | 108 ft | Shelby | High Hazard |
| Arclar/Willow Lake/Refuse Area 2 Dam | 108 ft | Saline | High Hazard |
| Coffeen Gmf Gypsum Stack Dam | 108 ft | Montgomery | High Hazard |