Johnson-Ronhovde Wetland Reservoir Report
Nearby: Spink Wpa Barrett Lake
Last Updated: December 5, 2025
The Johnson-Ronhovde Wetland, located in Grant County, Minnesota, is a privately owned fish and wildlife pond that serves as a vital water resource in the area.
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Summary
Constructed in 2001 by the Soil and Water Conservation District (SWCD), this Earth dam stands at a height of 10 feet and has a spillway width of 20 feet. With a normal storage capacity of 101 acre-feet and a maximum discharge rate of 140 cubic feet per second, this wetland plays a crucial role in supporting local ecosystems and maintaining water balance in the region.
Managed by the Minnesota Department of Natural Resources (MNDNR EWR), the Johnson-Ronhovde Wetland is regularly inspected for safety and functionality, with a hazard potential rated as low and a satisfactory condition assessment. Despite its relatively low risk profile, the wetland presents a very high risk in terms of its importance as a water resource and habitat for wildlife. With a drainage area of 0.14 square miles and a surface area of 41 acres, this wetland contributes to the overall health of the Mustinka River and surrounding ecosystems, making it a valuable asset for conservationists and climate enthusiasts alike.
As part of its risk management measures, the Johnson-Ronhovde Wetland undergoes inspections every 8 years to ensure its continued safety and effectiveness. With a commitment to meeting regulatory standards and maintaining high-quality water resources, this wetland serves as a model for sustainable water management practices in the region. For water resource and climate enthusiasts, the Johnson-Ronhovde Wetland represents a valuable asset in the fight against climate change and the preservation of critical ecosystems in Minnesota.
Year Completed |
2001 |
Dam Length |
70 |
Dam Height |
10 |
River Or Stream |
MUSTINKA RIVER-TR |
Primary Dam Type |
Earth |
Surface Area |
41 |
Drainage Area |
0.14 |
Nid Storage |
300 |
Structural Height |
11 |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
11 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Dam Data Reference
Condition Assessment
SatisfactoryNo existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
Fair
No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
Poor A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency. Investigations and studies are necessary.
Unsatisfactory
A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
Not Rated
The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Not Available
Dams for which the condition assessment is restricted to approved government users.
Hazard Potential Classification
HighDams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
Significant
Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environment damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
Low
Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
Undetermined
Dams for which a downstream hazard potential has not been designated or is not provided.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.
Area Campgrounds
| Location | Reservations | Toilets |
|---|---|---|
Niemackl Lake Park
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Tipsinah Mounds Park Campground
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Tipsinah Mounds City Park
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Johnson-Ronhovde Wetland