Niedan Number 1 Reservoir Report
Nearby: Noldner Number 1 Gothiermink Inc. #1
Last Updated: December 8, 2025
Niedan Number 1, located in Jones, South Dakota, is a privately owned earth dam completed in 1959 with a height of 20 feet and a length of 549 feet.
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Summary
The dam has a storage capacity of 91 acre-feet and a maximum discharge of 1260 cubic feet per second, serving the primary purpose of water resource management. Operated and regulated by the South Dakota Department of Environment and Natural Resources, Niedan Number 1 is subject to state jurisdiction, permitting, inspection, and enforcement to ensure its safety and compliance with regulations.
Managed by the Natural Resources Conservation Service, Niedan Number 1 has a low hazard potential and is currently rated as 'Not Rated' in terms of condition assessment. While the dam lacks an Emergency Action Plan and updated emergency contacts, it meets state guidelines and could benefit from further risk assessment and management measures. With its strategic location on the TR-BADRIVER, Niedan Number 1 plays a crucial role in the water infrastructure of South Dakota, highlighting the importance of sustainable water resource and climate management practices in the region.
Year Completed |
1959 |
Dam Length |
549 |
Dam Height |
20 |
River Or Stream |
TR-BADRIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
20 |
Nid Storage |
91 |
Hazard Potential |
Low |
Nid Height |
20 |
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.
Niedan Number 1