Hedman Number 1 Reservoir Report
Nearby: Alvin Horman Bergeson Dam
Last Updated: December 6, 2025
Hedman Number 1 is a privately owned earth dam located in Stanley, South Dakota, along the TR-PLUM CREEK river/stream.
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Summary
This dam, completed in 1946, stands at a height of 30 feet and has a maximum storage capacity of 52 acre-feet. It is regulated by the South Dakota Department of Environment and Natural Resources (DENR), with state permitting, inspection, and enforcement in place to ensure its safety and compliance with regulations.
Managed by the Natural Resources Conservation Service, Hedman Number 1 has a low hazard potential and is currently rated as "Not Rated" in terms of condition assessment. The dam has a maximum discharge capacity of 1438 cubic feet per second and serves the primary purpose of water resource management. With its strategic location and design, Hedman Number 1 plays a crucial role in providing water storage and flood control benefits to the surrounding area.
Although lacking certain detailed data such as inspection dates and risk assessment, Hedman Number 1 remains a key structure in the St. Paul District, contributing to the overall water resource management efforts in South Dakota. As climate change continues to impact water resources, the maintenance and monitoring of dams like Hedman Number 1 are essential for ensuring water security in the region.
Year Completed |
1946 |
Dam Length |
452 |
Dam Height |
30 |
River Or Stream |
TR-PLUM CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
25 |
Nid Storage |
52 |
Hazard Potential |
Low |
Nid Height |
30 |
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.
Hedman Number 1