9Total Dams
3High Hazard
1Significant
Dam Safety in Mason County, Illinois
Mason County has 9 dams tracked in the National Inventory of Dams. Of these, 3 are classified as high hazard — meaning failure would probably cause loss of human life. Another 1 carry a significant hazard classification. Currently, 1 dam has a condition assessment of poor or unsatisfactory.
The average dam in Mason County is 46 years old. The most common purpose is fish and wildlife pond. The tallest dam is Dynegy/havana Sta/east Ash Pond System at 38 ft.
Explore more: Oldest dams in Illinois · Tallest dams · High risk dams · Largest reservoirs
| Dam | Hazard | Condition | Height (ft) | Purpose | Year |
|---|---|---|---|---|---|
| Dynegy/havana Sta/east Ash Pond System | High | Not assessed | 38 | Other | 1999 |
| Dynegy/havana Sta/east Ash Pond Dam | High | Not assessed | 36 | Debris Control | |
| Dynegy/havana Station/cell 1, Polishing P | High | Not assessed | 26 | Debris Control | 1993 |
| Dynegy/havana Sta/south Ash Pond Dam | Significant | Not assessed | 0 | Other | |
| Lake Chautauqua Upper Dam | Low | Poor | 21 | Fish and Wildlife Pond | 1916 |
| Quiver Creek Weir Dam | Low | Fair | 17 | Fish and Wildlife Pond | 1988 |
| Chain Lake Water Control Dam | Low | Not assessed | 12 | Fish and Wildlife Pond | 2001 |
| Barkhausen Refuge Dam | Low | Not assessed | 10 | Fish and Wildlife Pond | |
| Crane Lake Water Control Dam | Low | Not assessed | 10 | Fish and Wildlife Pond |