Mustinka River is a gravity dam located in Grant County, Minnesota, built in 1940. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 21 ft21 ft tall and 50 ft long. 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 Mustinka River
The primary purpose of Mustinka River is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Mndnr-ewr (state). It impounds the Mustinka River near Norcross.
The dam stands 21 feet tall and stretches 50 feet across, has a maximum storage capacity of 1,300 acre-feet, and collects water from a drainage area of 163 square miles. Completed in 1940, the structure is well-established, with more than 75 years of service.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in 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 08/11/2021.
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Location
| State | Minnesota |
| County | Grant |
| Nearest City | Norcross |
| River/Stream | Mustinka River |
| Coordinates | 45.87239, -96.11982 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 21 ft |
| Dam Height | 18 ft |
| Dam Length | 50 ft |
| Year Completed | 1940 (86 years old) |
Storage & Hydraulics
| NID Storage | 1,300 acre-ft |
| Max Storage | 1,300 acre-ft |
| Normal Storage | 700 acre-ft |
| Drainage Area | 163 sq mi |
| Max Discharge | 2,400 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | Mndnr-ewr |
| Owner Type | State |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 08/11/2021 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MN00026 |
| Federal ID | MN00026 |
| More Info | State Dam Safety Program |