Okauchee Lake
Okauchee Lake is a gravity dam located in Waukesha County, Wisconsin, built in 1961. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About Okauchee Lake
The primary purpose of Okauchee Lake is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Town Of Oconomowoc (local government). It impounds the Oconomowoc near Oconomowoc Lake.
The dam stands 18 feet tall and stretches 450 feet across, creates a reservoir covering 1,187 acres, has a maximum storage capacity of 15,000 acre-feet, and collects water from a drainage area of 80 square miles. Completed in 1961, 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. 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 05/25/2022.
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Location
| State | Wisconsin |
| County | Waukesha |
| Nearest City | Oconomowoc Lake |
| River/Stream | Oconomowoc |
| Coordinates | 43.10854, -88.45387 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 18 ft |
| Dam Height | 18 ft |
| Dam Length | 450 ft |
| Year Completed | 1961 (65 years old) |
Storage & Hydraulics
| NID Storage | 15,000 acre-ft |
| Max Storage | 15,000 acre-ft |
| Normal Storage | 11,000 acre-ft |
| Surface Area | 1,187 acres |
| Drainage Area | 80 sq mi |
| Max Discharge | 1,589 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Recreation |
| Owner | TOWN OF OCONOMOWOC |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 05/25/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | WI00222 |
| Federal ID | WI00222 |
| More Info | State Dam Safety Program |