Sd Noname 265 Reservoir Report
Nearby: Sd No Name 263 Sd Noname 256
Last Updated: December 5, 2025
Sd Noname 265 is a private dam located in Haakon, South Dakota, along the TR-Cheyenne River.
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Summary
Built in 1958, this earth dam stands at a height of 24 feet and has a storage capacity of 77 acre-feet. It is regulated by the South Dakota Department of Environment and Natural Resources and undergoes regular inspections, enforcement, and permitting processes to ensure its safety and compliance with state regulations.
Despite its low hazard potential and current condition being rated as "Not Rated," Sd Noname 265 plays a crucial role in water resource management in the region. With a normal storage capacity of 33 acre-feet and a maximum discharge rate of 140 cubic feet per second, this dam serves as a vital infrastructure for flood control, irrigation, and water supply. The dam's location within the St. Paul District and under the oversight of the Natural Resources Conservation Service further emphasizes its significance in sustaining water resources for the community.
As a part of the larger water management system, Sd Noname 265 contributes to the overall resilience of the area against water-related challenges and fluctuations in climate. With its strategic position along the Cheyenne River, this dam not only helps mitigate flood risks but also supports agricultural activities and environmental sustainability in the region. Its history, design, and operational features make Sd Noname 265 a valuable asset for water resource and climate enthusiasts interested in understanding the intersection of infrastructure, regulation, and environmental stewardship.
Year Completed |
1958 |
Dam Length |
80 |
Dam Height |
24 |
River Or Stream |
TR-CHEYENNE RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
24 |
Nid Storage |
77 |
Hazard Potential |
Low |
Nid Height |
24 |
Seasonal Comparison
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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 265