Sd Noname 40 Reservoir Report
Nearby: Sd Noname 39 Sd Noname 43
Last Updated: December 5, 2025
Sd Noname 40 is a privately owned dam located in Haakon, South Dakota, along the TR-BAD RIVER.
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Summary
Built in 1970, this earth dam stands at a height of 13 feet and has a length of 440 feet. It has a storage capacity of 56 acre-feet, with a normal storage level of 24 acre-feet. The dam is regulated by the South Dakota Department of Environment and Natural Resources, with state permitting, inspection, and enforcement all in place.
Despite its low hazard potential, Sd Noname 40 has not been rated for its condition assessment. Emergency action plans and risk management measures are also not documented for this dam. The dam is not under the jurisdiction of the U.S. Army Corps of Engineers and has no associated federal funding or operations. The primary designer for this structure is the Natural Resources Conservation Service.
Overall, Sd Noname 40 serves as a key water resource structure in South Dakota, contributing to the management of the TR-BAD RIVER. While it has not been assessed for condition or implemented formal risk management measures, its low hazard potential suggests that it poses minimal risk to surrounding areas. As a privately owned dam, it is subject to state regulations and inspections to ensure its safety and functionality.
Year Completed |
1970 |
Dam Length |
440 |
Dam Height |
13 |
River Or Stream |
TR-BAD RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
13 |
Nid Storage |
56 |
Hazard Potential |
Low |
Nid Height |
13 |
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 40