Monches
Monches is a gravity dam located in Waukesha County, Wisconsin, built in 1844. It carries a Low hazard potential classification and has a fair condition assessment.
About Monches
The primary purpose of Monches is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by North Lake Management District (local government). It impounds the Oconomowoc near Monches.
The dam stands 14 feet tall and stretches 320 feet across, creates a reservoir covering 16 acres, has a maximum storage capacity of 50 acre-feet, and collects water from a drainage area of 33 square miles. Completed in 1844, the structure is one of the older dams in the region, with over a century and a half of service.
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 07/18/2013. That was over 12 years ago.
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Location
| State | Wisconsin |
| County | Waukesha |
| Nearest City | Monches |
| River/Stream | Oconomowoc |
| Coordinates | 43.18909, -88.34174 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 14 ft |
| Dam Height | 14 ft |
| Dam Length | 320 ft |
| Year Completed | 1844 (182 years old) |
Storage & Hydraulics
| NID Storage | 50 acre-ft |
| Max Storage | 50 acre-ft |
| Normal Storage | 20 acre-ft |
| Surface Area | 16 acres |
| Drainage Area | 33 sq mi |
| Max Discharge | 823 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Recreation |
| Owner | North Lake Management District |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 07/18/2013 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | WI00335 |
| Federal ID | WI00335 |
| More Info | State Dam Safety Program |