Sd Noname 258 Reservoir Report
Nearby: Hilland Dam Sd Noname 260
Last Updated: December 5, 2025
Sd Noname 258, located in Haakon, South Dakota, is a privately owned earth dam completed in 1943 with a height of 20 feet and a length of 800 feet.
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Summary
This dam, situated on the TR-CHEYENNE RIVER, serves the primary purpose of water storage, with a normal storage capacity of 80 acre-feet and a maximum storage capacity of 130 acre-feet. Despite its low hazard potential, the condition of Sd Noname 258 is currently not rated, and it has not undergone recent inspections or condition assessments.
Managed by the South Dakota Department of Environment and Natural Resources (DENR), Sd Noname 258 is regulated, permitted, inspected, and enforced by the state agency. The dam falls under the jurisdiction of the St. Paul District of the US Army Corps of Engineers and is situated in the congressional district represented by Dusty Johnson (R). Although the dam has not been modified in recent years and lacks certain safety features like spillways and outlet gates, it continues to provide essential water resource management functions for the region.
Overall, Sd Noname 258 stands as a testament to the historical development of water infrastructure in South Dakota, playing a crucial role in water storage and management along the TR-CHEYENNE RIVER. As climate change impacts water resources, it will be important to ensure that dams like Sd Noname 258 are regularly maintained and assessed for their safety and effectiveness in the face of evolving hydrological conditions.
Year Completed |
1943 |
Dam Length |
800 |
Dam Height |
20 |
River Or Stream |
TR-CHEYENNE RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
20 |
Nid Storage |
130 |
Hazard Potential |
Low |
Nid Height |
20 |
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 258