Griffith-Glynn Farm Pond Reservoir Report
Last Updated: December 13, 2025
Griffith-Glynn Farm Pond, also known as Monroe 7, is a privately owned earth dam located in Lambertson, Lyon County, Minnesota.
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Summary
Built in 1979 by the USDA NRCS, this structure serves as a flood risk reduction measure along the Cottonwood River. With a dam height of 25 feet and a length of 295 feet, the pond has a storage capacity of 77 acre-feet, providing crucial protection for the surrounding area.
Managed by the Minnesota Department of Natural Resources, the Griffith-Glynn Farm Pond has a low hazard potential and is deemed to be in satisfactory condition as of the last inspection in 2016. The dam features uncontrolled spillways and outlets, with a maximum discharge capacity of 289 cubic feet per second. While the risk assessment categorizes the structure as moderate, ongoing inspections and enforcement by regulatory agencies ensure the safety and functionality of the dam for the community.
For water resource and climate enthusiasts, Griffith-Glynn Farm Pond represents an essential piece of infrastructure in the region's flood control efforts. With its strategic location and effective design, this earth dam stands as a testament to responsible water management practices and collaboration between private owners and state agencies. As climate change continues to impact the frequency and intensity of extreme weather events, structures like Griffith-Glynn Farm Pond play a crucial role in safeguarding communities and mitigating flood risks in the face of uncertain environmental challenges.
Year Completed |
1979 |
Dam Length |
295 |
Dam Height |
25 |
River Or Stream |
COTTONWOOD RIVER-TR |
Primary Dam Type |
Earth |
Drainage Area |
1.2 |
Nid Storage |
77 |
Structural Height |
25 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
25 |
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 |
|---|---|---|
Garvin CP- Lower Campground
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Garvin CP - Upper Campground
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Swift Lake Park
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Sundquist Park at West Lake Sarah
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Griffith-Glynn Farm Pond