Evenson North Irrigation Reservoir Report

Last Updated: December 5, 2025

Evenson North Irrigation, located in Harding, South Dakota, is a privately owned irrigation structure that plays a crucial role in water resource management in the region.


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Summary

Built in 1950, this Earth dam stands at a height of 18 feet and has a storage capacity of 79 acre-feet, providing water for agricultural purposes in the area. The dam has a low hazard potential and is regulated by the South Dakota Department of Environment and Natural Resources, ensuring its safe operation and maintenance.

With a maximum discharge of 1050 cubic feet per second, Evenson North Irrigation serves as a reliable source of water for the surrounding community, particularly during dry seasons. Despite its age, the dam has not been rated for its condition, highlighting the need for regular inspections and maintenance to ensure its long-term functionality. The presence of this structure underscores the importance of sustainable water management practices in mitigating the impacts of climate change on water resources in the region.

As water resource and climate enthusiasts continue to monitor and assess the impact of climate change on water availability, structures like Evenson North Irrigation serve as vital components of the region's water infrastructure. By recognizing the importance of maintaining and regulating such irrigation systems, stakeholders can work towards ensuring a sustainable and secure water supply for both agricultural and ecological needs. The coordination between state and federal agencies in overseeing the operation and maintenance of these structures is essential in adapting to the changing climate and preserving water resources for future generations.

Year Completed

1950

Dam Length

300

Dam Height

18

River Or Stream

TRIB-LITTLE MISSONot RatedI

Primary Dam Type

Earth

Hydraulic Height

18

Nid Storage

79

Hazard Potential

Low

Nid Height

18
       
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.