Dundee Marsh Reservoir Report

Last Updated: December 12, 2025

Dundee Marsh, also known as Section 31 Impoundment, is a state-owned water resource located in Cottonwood County, Minnesota.


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Summary

Designed by Ducks Unlimited, this marsh serves as a vital habitat for wildlife and plays a crucial role in water management in the area. With a dam height of 7 feet and a capacity of 400 acre-feet, Dundee Marsh was completed in 2011 and covers an area of 873 acres.

Situated along the Des Moines River, Dundee Marsh is regulated by the Minnesota Department of Natural Resources and is inspected regularly to ensure its structural integrity. The dam has a low hazard potential and is deemed to be in satisfactory condition as of 2012. With a storage capacity of 400 acre-feet and a drainage area of 5.9 square miles, this water resource contributes to flood control, wildlife conservation, and recreational opportunities in the region.

Overall, Dundee Marsh stands as a testament to effective water resource management in Minnesota. Its importance extends beyond flood control to include habitat preservation, water quality improvement, and recreational benefits for the community. As climate change continues to impact water resources, Dundee Marsh serves as a model for sustainable and resilient infrastructure that adapts to changing environmental conditions.

Year Completed

2011

Dam Length

68

Dam Height

7

River Or Stream

DES MOINES RIVER-TR

Primary Dam Type

Other

Surface Area

873

Drainage Area

5.9

Nid Storage

400

Structural Height

10

Hazard Potential

Low

Foundations

Unlisted/Unknown

Nid Height

10
       
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.