Half Moon Lake
Half Moon Lake is a gravity dam located in Eau Claire County, Wisconsin, built in 1977. It carries a Low hazard potential classification and has a fair condition assessment.
About Half Moon Lake
The primary purpose of Half Moon Lake is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by City Of Eau Claire (local government). It impounds the Tributary To Sherman Creek near Eau Claire.
The dam stands 16 feet tall and stretches 200 feet across, creates a reservoir covering 132 acres, has a maximum storage capacity of 1,500 acre-feet, and collects water from a drainage area of 2 square miles. Completed in 1977, the structure is 49 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. Its condition is rated fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. The most recent inspection on record was 08/13/2020.
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Location
| State | Wisconsin |
| County | Eau Claire |
| Nearest City | Eau Claire |
| River/Stream | Tributary To Sherman Creek |
| Coordinates | 44.80174, -91.52925 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 16 ft |
| Dam Height | 16 ft |
| Dam Length | 200 ft |
| Year Completed | 1977 (49 years old) |
Storage & Hydraulics
| NID Storage | 1,500 acre-ft |
| Max Storage | 1,500 acre-ft |
| Normal Storage | 725 acre-ft |
| Surface Area | 132 acres |
| Drainage Area | 2 sq mi |
| Max Discharge | 58 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Recreation |
| Owner | City Of Eau Claire |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 08/13/2020 |
| Emergency Action Plan | No |
Identifiers
| NID ID | WI00809 |
| Federal ID | WI00809 |
| More Info | State Dam Safety Program |