Sd Noname 11 Reservoir Report
Nearby: Sd Noname 110 Sd Noname 128
Last Updated: December 5, 2025
Sd Noname 11 is a private dam located in Pennington, South Dakota, along the TR-RAPID CREEK.
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Summary
Built in 1938, this earth dam stands at a height of 21 feet and has a storage capacity of 168 acre-feet. Managed by the Natural Resources Conservation Service, this dam has a low hazard potential and has not been rated for its condition assessment.
While Sd Noname 11 is state-regulated and has permits for operation, inspection, and enforcement, it does not have an emergency action plan in place. Despite its age, the dam has not undergone any major modifications and remains in its original condition. With a maximum discharge capacity of 525 cubic feet per second, this dam plays a crucial role in water resource management in the region.
As a valuable asset in the Omaha District, Sd Noname 11 serves as a key structure for flood control and reservoir storage along the TR-RAPID CREEK. Its historical significance and functional importance make it a subject of interest for water resource and climate enthusiasts looking to understand the infrastructure that supports sustainable water management in South Dakota.
Year Completed |
1938 |
Dam Length |
630 |
Dam Height |
21 |
River Or Stream |
TR-RAPID CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
21 |
Nid Storage |
168 |
Hazard Potential |
Low |
Nid Height |
21 |
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.
Sd Noname 11