Iversen Number 3 Reservoir Report
Nearby: Iversen Number 5 Foster Number 3
Last Updated: December 8, 2025
Iversen Number 3 is a privately owned earth dam located in Jones, South Dakota, along the TR-Bad River.
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Summary
Built in 1957 by the Natural Resources Conservation Service, this dam stands at a height of 26 feet and has a length of 357 feet. With a storage capacity of 42 acre-feet and a maximum discharge rate of 1008 cubic feet per second, it serves as a vital structure for water resource management in the area.
Despite being classified as a low hazard potential structure with a condition assessment of "Not Rated," Iversen Number 3 is regulated, permitted, inspected, and enforced by the South Dakota Department of Environment and Natural Resources. This oversight ensures the safety and functionality of the dam, contributing to the overall water management efforts in the region. Additionally, the dam is located within the jurisdiction of the state and is subject to regular inspections to maintain its operational integrity.
As a key component in the water infrastructure of the area, Iversen Number 3 plays a crucial role in flood control, irrigation, and water supply management. With its modest height and capacity, this dam exemplifies the importance of proper regulation and inspection to ensure the safety and effectiveness of water resource structures in the face of changing climate conditions. Enthusiasts of water resources and climate management will find Iversen Number 3 to be a noteworthy example of responsible dam construction and maintenance.
Year Completed |
1957 |
Dam Length |
357 |
Dam Height |
26 |
River Or Stream |
TR-BAD RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
26 |
Nid Storage |
42 |
Hazard Potential |
Low |
Nid Height |
26 |
Seasonal Comparison
Weather Forecast
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.
Iversen Number 3