Le Sueur Erosion Project Reservoir Report

Last Updated: December 5, 2025

The Le Sueur Erosion Project, also known as Structure No.


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Summary

2, is a privately owned flood risk reduction structure located in Le Sueur, Minnesota. Designed by the USDA NRCS and completed in 1968, this earth dam stands at a height of 25 feet and spans 244 feet in length, with a storage capacity of 45 acre-feet. Its primary purpose is flood risk reduction, benefiting the surrounding area by protecting against potential inundation and helping to manage water flow in Lesueur Creek.

Despite its low hazard potential, the Le Sueur Erosion Project plays a crucial role in mitigating erosive forces and safeguarding the local community from flood events. With a moderate risk assessment rating, this structure is monitored for any potential maintenance needs or improvements to ensure its continued effectiveness in protecting the area. As a significant component of the water resource management infrastructure in Le Sueur, this project demonstrates the collaborative efforts between private owners and federal agencies like the Natural Resources Conservation Service to address climate-related challenges and enhance overall water quality and resilience in the region.

Year Completed

1968

Dam Length

244

Dam Height

25

River Or Stream

LESUEUR CREEK,MN-OFFSTREAM

Primary Dam Type

Earth

Surface Area

1

Hydraulic Height

25

Drainage Area

1.09

Nid Storage

45

Structural Height

25

Outlet Gates

Uncontrolled

Hazard Potential

Low

Foundations

Soil

Nid Height

25
       
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.