East Park Wma Pond Reservoir Report

Last Updated: December 13, 2025

East Park Wma Pond, also known as R-2 Nelson Slough, is a local government-owned water resource located in Marshall County, Minnesota.


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Summary

This flood risk reduction structure was completed in 1970 by the USDA NRCS and is regulated by the Minnesota Department of Natural Resources. The earth dam stands at a height of 12 feet and has a length of 72 feet, with a storage capacity of 8,600 acre-feet and a drainage area of 70 acres.

The pond serves as a controlled spillway for Judicial Ditch 19, with a maximum discharge capacity of 1,800 cubic feet per second. Despite its low hazard potential and satisfactory condition assessment, the risk assessment for East Park Wma Pond ranks it as very high. The structure is inspected every 8 years, with the last assessment conducted in September 2020. With its strategic location and crucial role in flood risk management, East Park Wma Pond is a valuable asset in safeguarding the surrounding community from potential water-related disasters.

Year Completed

1970

Dam Length

72

Dam Height

12

River Or Stream

JUDICIAL DITCH 19

Primary Dam Type

Earth

Surface Area

1720

Drainage Area

70

Nid Storage

8600

Structural Height

12

Outlet Gates

Uncontrolled

Hazard Potential

Low

Foundations

Unlisted/Unknown

Nid Height

12
       
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.