Mayowood Lake is a gravity dam located in Olmsted County, Minnesota, built in 1920. It carries a Low hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 25 ft25 ft tall and 140 ft long, taller than 50% of U.S. dams with a recorded height. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic concrete gravity section and the water level is illustrative.
About Mayowood Lake
Mayowood Lake is a dam in Olmsted, Minnesota. The dam is owned by County of Olmsted (local government). It impounds the Zumbro River South Fork near Rochester.
The dam stands 25 feet tall and stretches 140 feet across, creates a reservoir covering 10 acres, has a maximum storage capacity of 352 acre-feet, and collects water from a drainage area of 147 square miles. Completed in 1920, the structure is over a century 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. The most recent inspection on record was 06/27/2017.
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Location
| State | Minnesota |
| County | Olmsted |
| Nearest City | Rochester |
| River/Stream | Zumbro River South Fork |
| Coordinates | 43.99408, -92.52069 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 25 ft |
| Dam Height | 20 ft |
| Dam Length | 140 ft |
| Year Completed | 1920 (106 years old) |
Storage & Hydraulics
| NID Storage | 352 acre-ft |
| Max Storage | 352 acre-ft |
| Normal Storage | 220 acre-ft |
| Surface Area | 10 acres |
| Drainage Area | 147 sq mi |
| Max Discharge | 5,479 cfs |
Ownership & Safety
| Purpose | Other |
| Owner | County of Olmsted |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 06/27/2017 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MN00364 |
| Federal ID | MN00364 |
| More Info | State Dam Safety Program |