Hidden Lakes
Hidden Lakes is an earth dam located in Waukesha County, Wisconsin, built in 1967. It carries a Low hazard potential classification and has a fair condition assessment.
About Hidden Lakes
The primary purpose of Hidden Lakes is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Hidden Lakes Community Association (private). It impounds the Tr-fox River.
The dam stands 20 feet tall and stretches 400 feet across, creates a reservoir covering 10 acres, has a maximum storage capacity of 100 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1967, 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 fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. An emergency action plan is in place for this dam. The most recent inspection on record was 05/29/2013. That was over 12 years ago.
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Location
| State | Wisconsin |
| County | Waukesha |
| Nearest City | None |
| River/Stream | Tr-fox River |
| Coordinates | 42.88171, -88.30413 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 20 ft |
| Dam Height | 20 ft |
| Dam Length | 400 ft |
| Year Completed | 1967 (59 years old) |
Storage & Hydraulics
| NID Storage | 100 acre-ft |
| Max Storage | 100 acre-ft |
| Normal Storage | 50 acre-ft |
| Surface Area | 10 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 15 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Recreation |
| Owner | HIDDEN LAKES COMMUNITY ASSOCIATION |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 05/29/2013 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | WI00959 |
| Federal ID | WI00959 |
| More Info | State Dam Safety Program |