Kaskaskia Island Wildlife Area Lake Dam is an earth dam located in St. Clair County, Illinois, built in 1990. It carries a Low hazard potential classification.
Dam profile
NID height · 24 ft24 ft tall and 1,050 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Kaskaskia Island Wildlife Area Lake Dam
The primary purpose of Kaskaskia Island Wildlife Area Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Illinois Department of Natural Resources (local government). It impounds the Trib Kaskaskia River near Kaskaskia.
The dam stands 24 feet tall and stretches 1,050 feet across, and has a maximum storage capacity of 5,600 acre-feet. Completed in 1990, the structure is 36 years old.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life. The most recent inspection on record was 07/30/2024.
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Location
| State | Illinois |
| County | St. Clair |
| Nearest City | Kaskaskia |
| River/Stream | Trib Kaskaskia River |
| Coordinates | 38.33664, -89.86152 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 24 ft |
| Dam Height | 24 ft |
| Dam Length | 1,050 ft |
| Year Completed | 1990 (36 years old) |
Storage & Hydraulics
| NID Storage | 5,600 acre-ft |
| Max Storage | 5,600 acre-ft |
| Normal Storage | 1,800 acre-ft |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Illinois Department of Natural Resources |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 07/30/2024 |
| Emergency Action Plan | No |
Identifiers
| NID ID | IL50317 |
| Federal ID | IL50317 |
| More Info | State Dam Safety Program |