Sd Noname 128 Reservoir Report
Nearby: Sd Noname 11 Sd Noname 10
Last Updated: December 5, 2025
Sd Noname 128 is a privately owned earth dam located on the TR-RAPID CREEK in Pennington, South Dakota.
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Summary
Built in 1955, this dam stands at a height of 13 feet and has a storage capacity of 67 acre-feet. It serves the primary purpose of water resource management in the area, with normal storage levels at 25 acre-feet. The dam is regulated by the South Dakota Department of Environment and Natural Resources (DENR) and undergoes regular inspections, enforcement, and permitting processes to ensure its safety and compliance with state regulations.
Managed by the Natural Resources Conservation Service, Sd Noname 128 has a low hazard potential and is currently rated as "Not Rated" in terms of its condition assessment. It has a maximum discharge capacity of 546 cubic feet per second and a length of 600 feet. While the dam does not have an Emergency Action Plan (EAP) prepared or updated, it meets state guidelines for risk management measures. The dam is situated within the jurisdiction of South Dakota and is not under the ownership of any federal agency, highlighting its private ownership and management for water resource conservation and climate resilience in the region.
Overall, Sd Noname 128 plays a crucial role in regulating water flow and storage on the TR-RAPID CREEK, contributing to the overall water resource management efforts in Pennington, South Dakota. With its low hazard potential and state-regulated status, the dam serves as a key infrastructure for maintaining water levels and mitigating potential risks in the area. As a privately owned structure, it showcases the importance of collaboration between private entities and state agencies in safeguarding water resources and addressing climate-related challenges in the region.
Year Completed |
1955 |
Dam Length |
600 |
Dam Height |
13 |
River Or Stream |
TR-RAPID CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
13 |
Nid Storage |
67 |
Hazard Potential |
Low |
Nid Height |
13 |
Seasonal Comparison
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Dam Data Reference
Condition Assessment
SatisfactoryNo 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
HighDams 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.
Area Campgrounds
| Location | Reservations | Toilets |
|---|---|---|
Ellsworth AFB Military
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Rapid City - Black Hills KOA
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Central States Fairgrounds
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Sd Noname 128