Eastern Grazing Assn No2 Reservoir Report

Last Updated: December 13, 2025

Eastern Grazing Association No2 is a privately owned earth dam located in Campbell County, South Dakota.


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Summary

Built in 1963, this dam has a height of 26 feet and a length of 340 feet, providing a storage capacity of 70 acre-feet. It is regulated by the South Dakota Department of Environment and Natural Resources, with state permitting, inspection, and enforcement in place to ensure its safety and compliance with regulations.

The dam's primary purpose and associated structures are not specified in the data, but it is classified as a low hazard potential structure with a condition assessment of "Not Rated." Despite its age, the Eastern Grazing Association No2 dam remains in good standing with no reported issues or recent inspections. With a drainage area and maximum discharge of 840 cubic feet per second, this dam plays a crucial role in managing water resources in the area and mitigating flood risks.

Located within the St. Paul District of the US Army Corps of Engineers jurisdiction, the Eastern Grazing Association No2 dam exemplifies the importance of private ownership in water resource management. With its historical significance and continued functionality, this dam serves as a vital infrastructure for maintaining water security and climate resilience in Campbell County, South Dakota.

Year Completed

1963

Dam Length

340

Dam Height

26

River Or Stream

TR-MISSONot RatedI

Primary Dam Type

Earth

Hydraulic Height

26

Nid Storage

70

Hazard Potential

Low

Nid Height

26
       
Seasonal Comparison

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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.