Rieman Number 1 Reservoir Report
Last Updated: December 6, 2025
Rieman Number 1 is a privately owned earth dam located in Jones, South Dakota, along the TR-BAD River.
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Summary
Built in 1956 by the Natural Resources Conservation Service, this dam stands at 28 feet high and stretches 660 feet in length, with a storage capacity of 53 acre-feet. The dam is regulated by the South Dakota Department of Environment and Natural Resources, with state permitting, inspection, and enforcement in place to ensure its safety and compliance with regulations.
Despite its low hazard potential, Rieman Number 1 has not been rated for its condition assessment, indicating a need for further evaluation. Emergency action plans and risk assessments have not been prepared or updated for this dam, raising concerns about its readiness in the event of a disaster. With no US Army Corps of Engineers involvement, the responsibility for the maintenance and safety of Rieman Number 1 falls solely on its private owner.
Water resource and climate enthusiasts may find Rieman Number 1 an intriguing case study in the management and regulation of private dams. The lack of comprehensive assessment and emergency preparedness for this structure highlights the importance of regular inspections and risk mitigation measures to ensure the safety of dams and their surrounding communities. As climate change continues to impact water resources, the need for proactive monitoring and maintenance of dams like Rieman Number 1 becomes increasingly critical in safeguarding against potential hazards and ensuring sustainable water management practices.
Year Completed |
1956 |
Dam Length |
660 |
Dam Height |
28 |
River Or Stream |
TR-BAD RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
28 |
Nid Storage |
53 |
Hazard Potential |
Low |
Nid Height |
28 |
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.
Rieman Number 1