Iverson #1 Reservoir Report

Last Updated: December 8, 2025

Iverson #1 is a privately owned earth dam located in Jones County, South Dakota, with a primary purpose that is not specified in the data.


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Summary

It was completed in 1953 and has a dam height of 26 feet and a length of 205 feet, providing a storage capacity of 29 acre-feet. The dam is regulated by the South Dakota Department of Environment and Natural Resources (DENR) and is subject to state jurisdiction, permitting, inspection, and enforcement.

Although Iverson #1 has a low hazard potential, its condition assessment is currently listed as "Not Rated," indicating a lack of recent evaluation. The dam's emergency action plan (EAP) status, risk assessment, and risk management measures are also not provided in the data. It is important for water resource and climate enthusiasts to monitor the maintenance and assessment of Iverson #1 to ensure the safety and functionality of the dam in protecting the surrounding area, including the TRIB. BAD RIVER watershed. The involvement of the DENR and other relevant agencies in overseeing Iverson #1's operations and potential risks underscores the importance of responsible dam management in safeguarding water resources and communities in South Dakota.

Year Completed

1953

Dam Length

205

Dam Height

26

River Or Stream

TRIB. BAD RIVER

Primary Dam Type

Earth

Hydraulic Height

26

Nid Storage

29

Hazard Potential

Low

Nid Height

26
       
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.
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