Harold Stirling Reservoir Report
Nearby: Allen Stirling Number 2 Norman Estate
Last Updated: December 6, 2025
Harold Stirling is a privately owned dam located in Fort Pierre, South Dakota, along the tributary of Stranger Creek.
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Summary
Built in 1961 by the Natural Resources Conservation Service, this earth dam stands at a height of 25 feet with a length of 520 feet. It has a storage capacity of 27 acre-feet and a maximum discharge rate of 832 cubic feet per second.
Despite being classified as a low hazard potential structure with a "Not Rated" condition assessment, Harold Stirling is regulated by the South Dakota Department of Environment and Natural Resources. It undergoes regular state inspections, permitting, and enforcement to ensure its safety and compliance with regulatory standards. The dam serves a vital role in water resource management in the region, contributing to flood control and water storage.
With its location in Stanley County, Harold Stirling plays a crucial role in the local water infrastructure. Although details on its emergency action plan and risk assessment are not specified in the available data, its presence as a key earth dam in the area highlights the importance of proper maintenance and oversight to mitigate potential risks and ensure its continued functionality for water resource and climate enthusiasts alike.
Year Completed |
1961 |
Dam Length |
520 |
Dam Height |
25 |
River Or Stream |
TRIB. STRANGER CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
25 |
Nid Storage |
27 |
Hazard Potential |
Low |
Nid Height |
25 |
Seasonal Comparison
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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 Stirling