Olson Number 2 Reservoir Report
Nearby: Olson Number 1 Fho Ranch No.1
Last Updated: December 13, 2025
Olson Number 2 is a privately owned earth dam located in Jones, South Dakota, along the TR-BAD RIVER.
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Summary
Built in 1954, this dam stands at 27 feet tall and spans a length of 308 feet, providing a storage capacity of 58 acre-feet. Despite being regulated by the South Dakota Department of Environment and Natural Resources, the dam is currently rated as "Not Rated" in terms of condition assessment, with a low hazard potential.
Managed by the Natural Resources Conservation Service, Olson Number 2 has a maximum discharge of 420 cubic feet per second and is equipped with outlet gates for water control. While the dam has not been modified in recent years and lacks an Emergency Action Plan, it remains an integral part of the local water resource infrastructure. As climate change continues to impact water availability and quality, monitoring and maintaining dams like Olson Number 2 will be crucial for both water resource management and climate resilience efforts in the region.
Year Completed |
1954 |
Dam Length |
308 |
Dam Height |
27 |
River Or Stream |
TR-BAD RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
27 |
Nid Storage |
58 |
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.
Olson Number 2