Little Muskego
Little Muskego is a gravity dam located in Waukesha County, Wisconsin, built in 1972. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Little Muskego
The primary purpose of Little Muskego is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by City Of Muskego (local government). It impounds the Muskego Creek near Muskego.
The dam stands 12 feet tall and stretches 750 feet across, creates a reservoir covering 506 acres, has a maximum storage capacity of 4,300 acre-feet, and collects water from a drainage area of 11 square miles. Completed in 1972, the structure is well into its service life at over 50 years old.
This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 11/05/2021.
Living Downstream
If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. The Wisconsin dam safety program can provide more specific information about emergency planning for this structure.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Wisconsin |
| County | Waukesha |
| Nearest City | Muskego |
| River/Stream | Muskego Creek |
| Coordinates | 42.90710, -88.14110 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 12 ft |
| Dam Height | 12 ft |
| Dam Length | 750 ft |
| Year Completed | 1972 (54 years old) |
Storage & Hydraulics
| NID Storage | 4,300 acre-ft |
| Max Storage | 4,300 acre-ft |
| Normal Storage | 3,500 acre-ft |
| Surface Area | 506 acres |
| Drainage Area | 11 sq mi |
| Max Discharge | 325 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | City Of Muskego |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 11/05/2021 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | WI00703 |
| Federal ID | WI00703 |
| More Info | State Dam Safety Program |