Freeborn Lake Reservoir Report
Nearby: Prestorious F Pond Fountain Lake Cdf
Last Updated: December 6, 2025
Freeborn Lake, located in Freeborn, Minnesota, is a local government-owned water resource that has been regulated by the Minnesota Department of Natural Resources.
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Summary
This dam, completed in 1909, serves as a vital structure for water management and conservation purposes, with a storage capacity of 9,141 acre-feet and a surface area of 2,222 acres. The dam, standing at a height of 7 feet and spanning 90 feet in length, plays a crucial role in regulating the flow of the Big Cobb River and maintaining water levels in the surrounding area.
Despite its importance, Freeborn Lake has been assessed as being in poor condition, with a low hazard potential. The last inspection conducted in 2013 raised concerns about its structural integrity and highlighted the need for maintenance and repairs to ensure its continued functionality. The dam's emergency action plan and risk management measures are currently under review, emphasizing the importance of proactive measures to address potential risks and ensure the safety and sustainability of this water resource for both the local community and the environment. Enthusiasts of water resources and climate advocacy may find Freeborn Lake to be a focal point for discussions on the intersection of water management, infrastructure maintenance, and environmental stewardship.
Year Completed |
1909 |
Dam Length |
90 |
Dam Height |
5 |
River Or Stream |
BIG COBB RIVER |
Primary Dam Type |
Other |
Surface Area |
2222 |
Drainage Area |
12 |
Nid Storage |
9141 |
Structural Height |
7 |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
7 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Cedar River Near Austin
|
110cfs |
Le Sueur River Near Rapidan
|
179cfs |
Blue Earth River Near Rapidan
|
328cfs |
Minnesota River At Mankato
|
3240cfs |
Watonwan River Near Garden City
|
82cfs |
Straight River Near Faribault
|
83cfs |
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.
Freeborn Lake