Eagle Lake Reservoir Report

Last Updated: December 13, 2025

Eagle Lake, located in Mayer, Minnesota, is a state-regulated reservoir with a gravity dam constructed in 1965 by the Minnesota Department of Natural Resources (MNDNR).


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Summary

The dam stands at 8 feet high and has a length of 35 feet, creating a storage capacity of 1,631 acre-feet and a normal storage level of 932 acre-feet. With a surface area of 183 acres and a drainage area of 2.9 square miles, Eagle Lake serves as a vital water resource for the surrounding area.

This picturesque lake, situated in Carver County, is fed by the Crow River South Fork-TR and has a low hazard potential with a satisfactory condition assessment. The last inspection in 2018 confirmed its structural integrity, ensuring the safety of the community downstream. Despite its primary purpose as "Other," Eagle Lake provides various benefits such as recreation, wildlife habitat, and water supply management. Climate and water resource enthusiasts would appreciate the unique features and regulatory oversight of this tranquil reservoir.

Managed by the MNDNR, Eagle Lake is an essential part of the local ecosystem and a valuable asset for water supply and conservation efforts in Minnesota. Its serene waters and scenic surroundings make it a popular destination for outdoor enthusiasts and nature lovers alike. As a state-regulated body of water, Eagle Lake exemplifies responsible stewardship and sustainable management practices, serving as a model for other reservoirs in the region.

Year Completed

1965

Dam Length

35

Dam Height

8

River Or Stream

CROW RIVER S FORK-TR

Primary Dam Type

Gravity

Surface Area

183

Drainage Area

2.9

Nid Storage

1631

Structural Height

8

Hazard Potential

Low

Foundations

Unlisted/Unknown

Nid Height

8
       
Seasonal Comparison

Weather Forecast

Dam Data Reference

Condition Assessment

Satisfactory
No 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

High
Dams 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.