Sd Noname 105 Reservoir Report
Nearby: Owanka 1 Elmer Olsen
Last Updated: December 6, 2025
Sd Noname 105 is a privately owned dam located in Pennington, South Dakota, along the TR-CHEYENNE RIVER.
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Summary
This earth dam, completed in 1940, stands at a height of 21 feet and has a storage capacity of 126 acre-feet. Despite its age, the dam is classified as having a low hazard potential and has not been rated for its condition assessment.
Managed by the South Dakota Department of Environment and Natural Resources, Sd Noname 105 is subject to state regulations for permitting, inspection, and enforcement. The dam serves multiple purposes such as flood control, irrigation, and water supply. With a maximum discharge capacity of 1242 cubic feet per second, the dam plays a crucial role in managing water resources and mitigating potential risks in the area.
Although lacking certain data points such as inspection frequency and emergency action plan readiness, Sd Noname 105 remains an important infrastructure for the region. With its strategic location and historical significance, this dam underscores the critical role that water resource management plays in climate resilience and disaster preparedness efforts.
Year Completed |
1940 |
Dam Length |
440 |
Dam Height |
21 |
River Or Stream |
TR-CHEYENNERIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
21 |
Nid Storage |
126 |
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 105