Drolc No.1 Reservoir Report
Nearby: Cutler Dam Duck Dam
Last Updated: December 13, 2025
Drolc No.1 is a privately-owned earth dam located in Harding, South Dakota, along the Tributary of the Fork Grand River.
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Summary
Constructed in 1950 by the Natural Resources Conservation Service, this dam stands at a height of 27 feet and spans a length of 400 feet, with a storage capacity of 54 acre-feet. Despite its low hazard potential, this dam is regulated by the South Dakota Department of Environment and Natural Resources, ensuring that it meets state permitting, inspection, and enforcement requirements.
With a normal storage capacity of 46 acre-feet and a maximum discharge of 1050 cubic feet per second, Drolc No.1 plays a crucial role in managing water resources in the region. Although its condition assessment is currently marked as "Not Rated," the dam is designed to serve various purposes related to water conservation and flood control. Additionally, the dam has not undergone any modifications in recent years and does not fall under the jurisdiction of the US Army Corps of Engineers.
As a significant water infrastructure asset in South Dakota, Drolc No.1 serves as a key component in the state's water management system. Its strategic location and design contribute to the efficient regulation of water flow and storage, ensuring the safety and sustainability of surrounding communities and ecosystems. With its state-regulated status and low hazard potential, Drolc No.1 exemplifies the importance of responsible dam ownership and maintenance in the face of changing climate conditions and water resource challenges.
Year Completed |
1950 |
Dam Length |
400 |
Dam Height |
27 |
River Or Stream |
TRIB S FORK GRAND RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
27 |
Nid Storage |
54 |
Hazard Potential |
Low |
Nid Height |
27 |
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.
Drolc No.1