Lake Marion Reservoir Report
Nearby: Eagle Lake Round Grove Lake
Last Updated: December 12, 2025
Lake Marion, located in Brownton, Minnesota, is a privately owned reservoir regulated by the Minnesota Department of Natural Resources.
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Summary
Built in 1948, the dam stands at 8 feet tall and spans 37 feet in length, with a maximum storage capacity of 404 acre-feet. With a surface area of 520 acres and a drainage area of 7.4 square miles, the reservoir serves multiple purposes beyond water storage, making it a vital resource in the region.
Despite its low hazard potential and satisfactory condition assessment, Lake Marion undergoes inspections every eight years to ensure its structural integrity and safety. The reservoir, situated on Buffalo Creek-TR, supports a diverse ecosystem and provides recreational opportunities for residents and visitors alike. With its historical significance and contribution to the local environment, Lake Marion remains an essential component of water resource management in McLeod County, Minnesota.
Enthusiasts of water resources and climate will find Lake Marion's data fascinating, showcasing the intricate balance between human infrastructure and natural ecosystems. As a key player in water management in Minnesota, the reservoir exemplifies the importance of responsible stewardship and regulatory oversight in maintaining the health and sustainability of our water resources. From its construction in the mid-20th century to its ongoing role in flood control and recreation, Lake Marion stands as a testament to the enduring relationship between humans and water in a changing climate landscape.
Year Completed |
1948 |
Dam Length |
37 |
Dam Height |
8 |
River Or Stream |
BUFFALO CREEK-TR |
Primary Dam Type |
Other |
Surface Area |
520 |
Drainage Area |
7.4 |
Nid Storage |
404 |
Structural Height |
10 |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
10 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
High Island Creek Near Henderson
|
5cfs |
Minnesota River At New Ulm
|
1130cfs |
Cottonwood River Near New Ulm
|
215cfs |
Minnesota River At Morton
|
1750cfs |
Little Cottonwood River Near Courtland
|
33cfs |
Minnesota River Near Jordan
|
2960cfs |
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.
Lake Marion Co Park
Lake Marion Park Campground
Masonic West River Park
Masonic/West River City Park
Lake Allie Park Campground
Lake Allie Co Park
Lake Marion