Knox Number 1 Reservoir Report
Nearby: Olson Ranches Inc. #10 Knox Number 2
Last Updated: December 13, 2025
Knox Number 1, located in South Dakota along the TR-BAD RIVER, is a privately owned earth dam completed in 1953 with a height of 27 feet and a storage capacity of 22 acre-feet.
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Summary
Managed by the Natural Resources Conservation Service, this dam is regulated by the South Dakota Department of Environment and Natural Resources, ensuring regular inspections and enforcement of safety measures. With a low hazard potential and a condition assessment of "Not Rated", Knox Number 1 serves as a vital water resource for the surrounding area.
Despite its age, Knox Number 1 remains a sturdy structure with a normal storage capacity of 16 acre-feet and a maximum discharge rate of 441 cubic feet per second. While it has not been rated for condition, its low hazard potential suggests that it poses minimal risk to downstream communities. With its location in Jones County, South Dakota, Knox Number 1 plays a crucial role in water management and conservation efforts in the region.
As a key component of the local water infrastructure, Knox Number 1 contributes to water resource management along the TR-BAD RIVER, providing essential storage and flood control benefits. With its regulated status and oversight by state authorities, this dam exemplifies the importance of maintaining and monitoring critical water structures to ensure the safety and security of communities that rely on them for water supply and protection against potential hazards.
Year Completed |
1953 |
Dam Length |
330 |
Dam Height |
27 |
River Or Stream |
TR-BAD RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
27 |
Nid Storage |
22 |
Hazard Potential |
Low |
Nid Height |
27 |
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.
Knox Number 1