Harold Millett Pond No.1 Reservoir Report
Last Updated: December 14, 2025
Harold Millett Pond No.1, located in Harding, South Dakota, is a privately owned earth dam structure built in 1954 on Rabbit Creek.
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Summary
This dam stands at a height of 16 feet and has a storage capacity of 56 acre-feet, serving as a crucial water resource for the area. Despite being non-federally owned, the dam is regulated and permitted by the South Dakota Department of Environment and Natural Resources (DENR), ensuring regular inspections and enforcement of safety measures.
With a low hazard potential and a current condition assessment of "Not Rated," Harold Millett Pond No.1 remains a vital infrastructure for water management in the region. The dam has a maximum discharge capacity of 3000 cubic feet per second, providing flood protection and water storage for the surrounding area. While the dam has not been rated for its condition, its state-regulated status and compliance with inspection, permitting, and enforcement requirements indicate a commitment to ensuring its safety and functionality for the community.
As a part of the Omaha District of the US Army Corps of Engineers, Harold Millett Pond No.1 contributes to water resource management and climate resilience efforts in South Dakota. With its historical significance dating back to 1954, this dam continues to play a crucial role in water storage, flood control, and environmental stewardship in the region. Climate enthusiasts and water resource professionals alike can appreciate the importance of this structure in maintaining the balance of water resources in Harding County.
Year Completed |
1954 |
Dam Length |
850 |
Dam Height |
16 |
River Or Stream |
TR-RABBIT CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
16 |
Nid Storage |
56 |
Hazard Potential |
Low |
Nid Height |
16 |
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.
Harold Millett Pond No.1