Sd Noname 117 Reservoir Report
Nearby: Sd Noname 115 Shyne 1
Last Updated: December 5, 2025
Sd Noname 117 is a privately owned dam located in Pennington, South Dakota, along the TR-CHEYENNE river.
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Summary
Built in 1954, this Earth-type dam stands at 15 feet high and stretches 420 feet in length, providing a storage capacity of 120 acre-feet. With a maximum discharge rate of 1250 cubic feet per second, this dam plays a crucial role in managing water resources and mitigating flood risks in the region.
Managed by the South Dakota Department of Environment and Natural Resources (DENR), Sd Noname 117 is regulated, inspected, and enforced to ensure its structural integrity and safety. Despite being rated as having a low hazard potential and not yet assessed for its condition, this dam serves as a key infrastructure for water management in the area. With no associated structures or emergency action plan in place, there is room for further enhancement of its risk management measures to better address potential emergencies.
As a part of the St. Paul District under the US Army Corps of Engineers, Sd Noname 117 represents a significant asset in water resource management in South Dakota. With its vital role in flood control and water storage, this dam underscores the importance of proper monitoring and maintenance to ensure its continued functionality and safety for the surrounding communities and ecosystems.
Year Completed |
1954 |
Dam Length |
420 |
Dam Height |
15 |
River Or Stream |
TR-CHEYENNE |
Primary Dam Type |
Earth |
Hydraulic Height |
15 |
Nid Storage |
120 |
Hazard Potential |
Low |
Nid Height |
15 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
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 117