Eagle Lake Reservoir Report
Nearby: Mountain Lake Bennett Wma
Last Updated: December 13, 2025
Eagle Lake, located in Cottonwood County, Minnesota, is a gravity dam completed in 1948 with a primary purpose listed as "Other." This structure, managed by the local government, stands at a height of 11 feet and has a normal storage capacity of 6,148 acre-feet.
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Summary
With a surface area of 105 acres and a drainage area of 0.83 square miles, Eagle Lake plays a crucial role in water resource management in the region.
The dam on Eagle Lake is regulated by the Minnesota Department of Natural Resources and is subject to state jurisdiction, permitting, inspection, and enforcement. Despite being classified as having a low hazard potential and satisfactory condition, the risk assessment for this structure is moderate. The dam's spillway is uncontrolled, and it has not been modified in recent years. Although the last inspection took place in 2012, with a frequency of every 8 years, Eagle Lake continues to serve its purpose effectively and contributes to the overall water management strategy in the area.
With its proximity to the Watonwan River, Eagle Lake is a vital component of the local ecosystem and plays a key role in flood control and water storage. The dam's location in Mountain Lake, Minnesota, highlights its importance in the region's water infrastructure. As climate change continues to impact water resources, Eagle Lake remains a crucial asset for water resource and climate enthusiasts to monitor and study for sustainable water management practices in the future.
Year Completed |
1948 |
Dam Length |
12 |
Dam Height |
11 |
River Or Stream |
WATONWAN RIVER-TR |
Primary Dam Type |
Gravity |
Surface Area |
105 |
Hydraulic Height |
7 |
Drainage Area |
0.83 |
Nid Storage |
9628 |
Structural Height |
10 |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
11 |
Seasonal Comparison
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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.
Eagle Lake