Perault Number 1 Reservoir Report
Nearby: Perault Number 4 Perault Number 6
Last Updated: December 7, 2025
Perault Number 1 is a privately owned dam located in Jones, South Dakota, on the TR-White River.
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Summary
Built in 1959, this earth dam stands at a height of 27 feet and has a length of 456 feet, providing a storage capacity of 51 acre-feet. The dam is regulated by the South Dakota Department of Environment and Natural Resources, with provisions for permitting, inspection, and enforcement in place to ensure its safe operation.
Although classified as having a low hazard potential, the condition of Perault Number 1 has not been rated. Despite this, the dam has not undergone a recent inspection and does not have an established emergency action plan (EAP) in place. While the dam is considered to be in good condition, the absence of recent assessments and emergency preparedness measures may pose a risk in the event of a failure. Efforts should be made to update inspections, establish an EAP, and ensure that the dam meets safety guidelines to mitigate any potential risks associated with its operation.
Year Completed |
1959 |
Dam Length |
456 |
Dam Height |
27 |
River Or Stream |
TR-WHITE RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
27 |
Nid Storage |
51 |
Hazard Potential |
Low |
Nid Height |
27 |
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.
Perault Number 1