Sd Noname 4 Reservoir Report
Nearby: Sd Noname 104 Sd Noname 15
Last Updated: December 13, 2025
Sd Noname 4 is a privately owned dam located in Haakon, South Dakota, along the TR-BAD RIVER.
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Summary
The dam was completed in 1935 and serves the primary purpose of water storage with a capacity of 100 acre-feet and a normal storage of 30 acre-feet. It has a low hazard potential and a height of 14 feet, with a maximum discharge of 1200 cubic feet per second.
Managed by the South Dakota Department of Environment and Natural Resources (DENR), Sd Noname 4 is regulated, permitted, inspected, and enforced by the state agency. The dam is classified as an Earth dam type, with a length of 421 feet. Although the condition assessment is currently not rated, the dam has not undergone any modifications or inspections in recent years.
Represented by Congressman Dusty Johnson, Sd Noname 4 falls under the jurisdiction of the St. Paul District of the US Army Corps of Engineers. Despite being privately owned, the dam does not have any associated structures or federal agency involvement in its funding, design, construction, or operation. With its historical significance and essential role in water resource management, Sd Noname 4 stands as a testament to the enduring impact of infrastructure projects on the environment and local communities.
Year Completed |
1935 |
Dam Length |
421 |
Dam Height |
14 |
River Or Stream |
TR-BAD RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
14 |
Nid Storage |
100 |
Hazard Potential |
Low |
Nid Height |
14 |
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 4