Sumner Twp 25 Reservoir Report

Last Updated: December 5, 2025

Sumner Twp 25, also known as Mistakenly Rudlong Pond, is a privately owned structure located in Fillmore County, Minnesota.


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Summary

This dam on Kedron Brook was designed by NRCS with state regulation and permitting by MNDNR EWR. With a primary purpose of flood risk reduction, the earth dam stands at 24 feet high and spans a length of 260 feet, providing a storage capacity of 53 acre-feet.

Despite its low hazard potential and satisfactory condition assessment, Sumner Twp 25 has a normal storage capacity of 4 acre-feet and covers a surface area of 1 acre with a drainage area of 0.22 square miles. The dam's maximum discharge capacity is 422 cubic feet per second, showcasing its ability to manage water flow efficiently. With state inspection, enforcement, and regulation in place, this structure plays a crucial role in mitigating flood risks in the region.

Situated in the city of Whalan, Sumner Twp 25 is a vital component of the local water resource infrastructure. With its association with the St. Paul District of the USACE and a history of satisfactory condition assessments, this dam serves as a key asset in flood risk reduction efforts along Kedron Brook. The data highlights the importance of proper maintenance and regulatory oversight to ensure the continued effectiveness of this essential water management structure for the community.

Dam Length

260

Dam Height

24

River Or Stream

KEDRON BROOK

Primary Dam Type

Earth

Surface Area

1

Drainage Area

0.22

Nid Storage

53

Hazard Potential

Low

Foundations

Unlisted/Unknown

Nid Height

24
       
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.