Ac Hooker Reservoir Report

Last Updated: December 13, 2025

Ac Hooker, located in Corson, South Dakota, is a privately owned earth dam constructed in 1969 on Dirt Lodge Creek Trib.


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Summary

This dam stands at a height of 21 feet and has a storage capacity of 50 acre-feet, with a normal storage level of 21 acre-feet. Managed by the Natural Resources Conservation Service, Ac Hooker is regulated by the South Dakota Department of Environment and Natural Resources, with state jurisdiction, permitting, inspection, and enforcement in place to ensure its safety and compliance with regulations.

Despite its low hazard potential, Ac Hooker has not been rated for its condition assessment, indicating the need for further evaluation. While there is currently no emergency action plan in place, the dam does not pose an immediate threat. With a maximum discharge capacity of 600 cubic feet per second, Ac Hooker serves as a crucial structure for water resource management in the area. The dam has not undergone any modifications since its completion, and its risk assessment and management measures remain unspecified.

Overall, Ac Hooker plays a vital role in water resource management in South Dakota, providing storage and flood control benefits to the surrounding area. With its state-regulated status and low hazard potential, efforts to assess and maintain the dam's condition are essential to ensure its continued safety and functionality in the face of changing climate conditions. As a key component of the local water infrastructure, Ac Hooker highlights the importance of proactive monitoring and management of dams to safeguard against potential risks and ensure sustainable water resource management for the future.

Year Completed

1969

Dam Length

491

Dam Height

21

River Or Stream

DIRT LODGE CREEK TRIB

Primary Dam Type

Earth

Hydraulic Height

21

Nid Storage

50

Hazard Potential

Low

Nid Height

21
       
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.