Sodus 8 & 9 Reservoir Report

Last Updated: December 12, 2025

Sodus 8 & 9, located in Lyon, Minnesota, are essential structures managed by the local government for water resource management.


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Summary

These structures are designed for roadway retention and are regulated by the Minnesota Department of Natural Resources, ensuring proper permitting, inspection, and enforcement. With a height of 21 feet and a storage capacity of 125 acre-feet, Sodus 8 & 9 play a crucial role in controlling the flow of Meadow Creek-TR and protecting the surrounding area from potential flooding.

Although categorized as low hazard potential, Sodus 8 & 9 have not been rated for their condition assessment. The last inspection in April 2019 revealed a need for more frequent assessments, with an inspection frequency of 8. While the emergency action plan status and risk assessment measures are not fully documented, the structures remain operational and essential for water management in the region. With Collin Peterson (D) as the congressional representative, efforts to ensure the safety and efficiency of Sodus 8 & 9 are ongoing to mitigate any potential risks and enhance their long-term effectiveness in water resource management.

Dam Length

880

Dam Height

21

River Or Stream

MEADOW CREEK-TR

Drainage Area

2

Nid Storage

125

Hazard Potential

Low

Foundations

Unlisted/Unknown

Nid Height

21
       
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.