Lake Henry Dam is an earth dam located in Jackson County, Illinois, built in 1963. It carries a Low hazard potential classification.
Dam profile
NID height · 13 ft13 ft tall and 290 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 Lake Henry Dam
The primary purpose of Lake Henry Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Jackson Country Club (private). It impounds the Trib Big Muddy River near Murphysboro.
The dam stands 13 feet tall and stretches 290 feet across, and has a maximum storage capacity of 78 acre-feet. Completed in 1963, the structure is well into its service life at over 50 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 09/29/2023.
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Location
| State | Illinois |
| County | Jackson |
| Nearest City | Murphysboro |
| River/Stream | Trib Big Muddy River |
| Coordinates | 37.75343, -89.28496 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 13 ft |
| Dam Height | 13 ft |
| Dam Length | 290 ft |
| Year Completed | 1963 (63 years old) |
Storage & Hydraulics
| NID Storage | 78 acre-ft |
| Max Storage | 78 acre-ft |
| Normal Storage | 50 acre-ft |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Jackson Country Club |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 09/29/2023 |
| Emergency Action Plan | No |
Identifiers
| NID ID | IL00094 |
| Federal ID | IL00094 |
| More Info | State Dam Safety Program |