Iversen Number 1 Reservoir Report
Nearby: Hight Number 1 Nix Number 4
Last Updated: December 13, 2025
Iversen Number 1, located in South Dakota, is a privately owned Earth dam completed in 1957 with a height of 25 feet and a length of 279 feet.
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Summary
Managed by the Natural Resources Conservation Service, this dam serves the primary purpose of water resource management along the TR-WHITERIVER. With a storage capacity of 22 acre-feet and a maximum discharge of 375 cubic feet per second, Iversen Number 1 plays a crucial role in regulating water flow in the region.
Despite being rated as having a low hazard potential and not yet assessed for its condition, Iversen Number 1 is regulated by the South Dakota Department of Environment and Natural Resources. The dam is equipped with state-permitted and inspected features, highlighting its importance in ensuring the safety and efficiency of water resource management in the area. With Dusty Johnson (R) as the Congressional representative for the district, the dam stands as a vital infrastructure for climate and water resource enthusiasts to monitor and support.
Water resource and climate enthusiasts can appreciate Iversen Number 1 for its contribution to water management in South Dakota. This dam, with its strategic location and functionality, serves as a key structure in the St. Paul District that aids in flood control and irrigation purposes. With its low hazard potential and state-regulated status, Iversen Number 1 reflects a commitment to ensuring the safety and sustainability of water resources in the region. As a significant part of the water infrastructure, this dam underscores the importance of responsible water management practices in the face of changing climate conditions.
Year Completed |
1957 |
Dam Length |
279 |
Dam Height |
25 |
River Or Stream |
TR-WHITERIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
25 |
Nid Storage |
22 |
Hazard Potential |
Low |
Nid Height |
25 |
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.
Iversen Number 1