Sd Noname 73 Reservoir Report
Nearby: Sd Noname 72 Sd Noname 71
Last Updated: December 6, 2025
Sd Noname 73 is a privately owned dam located in Haakon, South Dakota, along the TR-BAD RIVER.
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Summary
Built in 1957, this earth dam stands at a height of 17 feet and spans 500 feet in length. It has a storage capacity of 136 acre-feet and a maximum discharge rate of 1260 cubic feet per second. Despite being regulated by the South Dakota Department of Environment and Natural Resources (DENR), the dam is classified as low hazard potential with a condition assessment of "Not Rated."
The dam has not been inspected recently, and its emergency action plan (EAP) status, risk assessment, and management measures are also unclear. The primary purpose and associated structures of Sd Noname 73 are not specified in the data. With the dam being privately owned, it lacks federal agency involvement in terms of funding, design, construction, regulation, and inspection. The dam is situated in close proximity to the city of Philip and is under the jurisdiction of the state of South Dakota.
Given the limited information available, water resource and climate enthusiasts may find Sd Noname 73 an intriguing case study for the complexities of private dam ownership and oversight. The dam's historical significance, low hazard potential, and lack of recent inspections raise questions about its current condition and emergency preparedness. The involvement of state regulators and the absence of federal agency support highlight the challenges of maintaining and monitoring dams in rural areas like Haakon County.
Year Completed |
1957 |
Dam Length |
500 |
Dam Height |
17 |
River Or Stream |
TR-BAD RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
17 |
Nid Storage |
136 |
Hazard Potential |
Low |
Nid Height |
17 |
Seasonal Comparison
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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 73