Se Sw Sec.31-T1n-R26e Reservoir Report

Last Updated: December 6, 2025

Located in Jones County, South Dakota, the Se Sw Sec.31-T1n-R26e dam stands as a testament to the state's commitment to water resource management and climate resilience.


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Summary

Constructed in 1956, this earth dam spans 219 feet in length and reaches a height of 26 feet, with a maximum storage capacity of 24 acre-feet. Situated on a tributary of the Bad River, this structure plays a crucial role in regulating water flow and mitigating flood risks in the region.

Managed by the South Dakota Department of Environment and Natural Resources (DENR), the Se Sw Sec.31-T1n-R26e dam is subject to regular state inspections, permitting, and enforcement to ensure its structural integrity and safety standards. With a low hazard potential and a "Not Rated" condition assessment, this dam serves as a vital component of the local water infrastructure, contributing to the conservation of natural resources and the protection of surrounding communities from potential hazards.

As climate change continues to impact water resources and weather patterns, the Se Sw Sec.31-T1n-R26e dam stands as a crucial asset in South Dakota's efforts to adapt to a changing environment. With its strategic location and operational capacity, this dam exemplifies the state's proactive approach to addressing climate-related challenges and ensuring the resilience of its water infrastructure for future generations.

Year Completed

1956

Dam Length

219

Dam Height

26

River Or Stream

TRIB. BAD RIVER

Primary Dam Type

Earth

Hydraulic Height

26

Nid Storage

24

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.