Plum Creek Grazing Assn Reservoir Report
Last Updated: December 14, 2025
Plum Creek Grazing Association, located in Stanley, South Dakota, is a privately owned dam on the tributary of Plum Creek.
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Summary
Built in 1959, this earth dam stands at a height of 42 feet and spans a length of 500 feet, providing a storage capacity of 71 acre-feet. The dam is regulated by the South Dakota Department of Environment and Natural Resources and is subject to regular inspections, permitting, and enforcement to ensure its safety and compliance with state regulations.
Managed by the Natural Resources Conservation Service, Plum Creek Grazing Association is considered to have a low hazard potential and is currently rated as "Not Rated" in terms of its condition assessment. While the dam does not have an Emergency Action Plan (EAP) in place, it meets state guidelines and is equipped with emergency contacts. The dam's risk assessment, risk management measures, and inundation maps are yet to be prepared, indicating a potential area for improvement in the future.
Despite its low hazard potential, Plum Creek Grazing Association serves as a crucial water resource for the surrounding area, providing irrigation and flood control benefits. With its strategic location and efficient management, this dam plays a vital role in supporting the local agricultural community and preserving the ecosystem of Plum Creek.
Year Completed |
1959 |
Dam Length |
500 |
Dam Height |
42 |
River Or Stream |
TRIB. PLUM CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
42 |
Nid Storage |
71 |
Hazard Potential |
Low |
Nid Height |
42 |
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.
Plum Creek Grazing Assn