Sd Noname 100 Reservoir Report

Last Updated: December 5, 2025

Sd Noname 100 is a privately owned dam located in Pennington, South Dakota, with a low hazard potential and a height of 20 feet.


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Summary

Built in 1965, this earth dam serves the primary purpose of regulating the flow of TR-SPRINGCREEK, with a storage capacity of 216 acre-feet. Managed by the South Dakota Department of Environment and Natural Resources, the dam is subject to state regulation, inspection, and enforcement to ensure its safety and functionality.

The design of Sd Noname 100 was carried out by the Natural Resources Conservation Service, reflecting a commitment to sustainable water resource management and environmental conservation. With a maximum discharge capacity of 2120 cubic feet per second, the dam plays a crucial role in flood control and water supply for the surrounding area. Although its condition is currently not rated, ongoing monitoring and maintenance efforts are in place to ensure the dam's integrity and safety for the community.

As a key infrastructure asset in the region, Sd Noname 100 highlights the intersection of water resource management and climate resilience. By adhering to state regulations and implementing risk management measures, the dam serves as a vital component in protecting against potential hazards and ensuring the sustainable use of water resources in South Dakota.

Year Completed

1965

Dam Length

990

Dam Height

20

River Or Stream

TR-SPRINGCREEK

Primary Dam Type

Earth

Hydraulic Height

20

Nid Storage

216

Hazard Potential

Low

Nid Height

20
       
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.