Sd Noname 77 Reservoir Report
Nearby: Sd Noname 78 Sd Noname 81
Last Updated: December 5, 2025
Sd Noname 77 is a privately owned dam located in Haakon, South Dakota, along the TR-BAD RIVER.
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Summary
Built in 1950, this earthen dam stands at a height of 16 feet and has a length of 1000 feet. It has a storage capacity of 333 acre-feet and a maximum discharge of 2500 cubic feet per second. Despite its age, the dam is classified as low hazard potential with a condition assessment of "Not Rated."
Managed by the South Dakota Department of Environment and Natural Resources (DENR), Sd Noname 77 is regulated, permitted, inspected, and enforced by the state. The dam is not under the jurisdiction of any federal agency and has not undergone any modifications in recent years. While it currently does not have an Emergency Action Plan (EAP) in place, it meets state guidelines for dam safety.
The location of Sd Noname 77 and its ownership by a private entity contribute to its unique status in the water resource management landscape. With its low hazard potential and state regulation, this dam serves as an important infrastructure for water storage and flood control in the region. For water resource and climate enthusiasts, Sd Noname 77 presents an intriguing case study in the intersection of private ownership, state regulation, and dam safety.
Year Completed |
1950 |
Dam Length |
1000 |
Dam Height |
16 |
River Or Stream |
TR-BAD RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
16 |
Nid Storage |
333 |
Hazard Potential |
Low |
Nid Height |
16 |
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 77