Stockwater Dam Reservoir Report
Nearby: Grass Creek 727 (Nid) Carl Hansen
Last Updated: December 7, 2025
Stockwater Dam, located in Stanley, South Dakota, is a privately owned earth dam designed by the USDA NRCS and completed in 1984.
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Summary
With a height of 28 feet and a maximum storage capacity of 52 acre-feet, this dam serves the primary purpose of providing water for stockwatering. Situated on the TR-Minneconjou Creek, the dam has a low hazard potential and is regulated by the state agency DENR.
Managed by the Natural Resources Conservation Service, Stockwater Dam features an uncontrolled spillway with a width of 86 feet and a maximum discharge capacity of 1160 cubic feet per second. Despite being in a moderate risk category, the dam's condition is currently rated as not assessed. While the dam has not been inspected recently, it meets state regulatory requirements for inspection, permitting, and enforcement, ensuring its safety and compliance with regulations. For water resource and climate enthusiasts, Stockwater Dam represents a vital infrastructure for water management and conservation in the region.
Year Completed |
1984 |
Dam Length |
432 |
Dam Height |
28 |
River Or Stream |
TR-MINNECONJOU CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
28 |
Nid Storage |
52 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
28 |
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.
Stockwater Dam