Upper Mayville
Upper Mayville is an earth dam located in Dodge County, Wisconsin, built in 1848. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About Upper Mayville
The primary purpose of Upper Mayville is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by City Of Mayville (local government). It impounds the East Branch Rock near Mayville.
The dam stands 15 feet tall and stretches 200 feet across, creates a reservoir covering 41 acres, has a maximum storage capacity of 300 acre-feet, and collects water from a drainage area of 172 square miles. Completed in 1848, 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 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 10/05/2021.
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Location
| State | Wisconsin |
| County | Dodge |
| Nearest City | Mayville |
| River/Stream | East Branch Rock |
| Coordinates | 43.49382, -88.54287 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 15 ft |
| Dam Height | 15 ft |
| Dam Length | 200 ft |
| Year Completed | 1848 (178 years old) |
Storage & Hydraulics
| NID Storage | 300 acre-ft |
| Max Storage | 300 acre-ft |
| Normal Storage | 227 acre-ft |
| Surface Area | 41 acres |
| Drainage Area | 172 sq mi |
| Max Discharge | 4,400 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Recreation |
| Owner | City of Mayville |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 10/05/2021 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | WI00122 |
| Federal ID | WI00122 |
| More Info | State Dam Safety Program |