Sladek Dam Reservoir Report

Last Updated: December 13, 2025

Sladek Dam in South Dakota, completed in 1949, stands as a testament to the ingenuity and foresight of its designers at the Natural Resources Conservation Service.


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Summary

This private-owned earth dam reaches a height of 26 feet and spans 248 feet in length, providing vital water storage of up to 32 acre-feet for the surrounding area. Situated in Brule County, this dam plays a crucial role in regulating water flow, with a maximum discharge capacity of 220 cubic feet per second.

Despite its age, Sladek Dam maintains a low hazard potential and is currently rated as 'Not Rated' in terms of its condition assessment. While lacking specific information on its maintenance and inspection history, its state-regulated status ensures that necessary permitting, inspection, and enforcement protocols are in place to safeguard the structure and surrounding community. The dam's location along the TR-MISSONot RatedI stream underscores its importance in water resource management and the broader climate resilience efforts in the region.

As water resource and climate enthusiasts, the intricacies and significance of structures like Sladek Dam serve as a reminder of the interconnectedness between human development and environmental stewardship. With its modest yet vital role in water storage and flow regulation, this earth dam stands as a silent sentinel against the uncertainties of climate change, embodying the collaborative efforts of various agencies and stakeholders in ensuring water security for both present and future generations.

Year Completed

1949

Dam Length

248

Dam Height

26

River Or Stream

TR-MISSONot RatedI

Primary Dam Type

Earth

Hydraulic Height

26

Nid Storage

32

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.