Glenn Wishard Reservoir Report
Nearby: G.M. Strand Ernest Kolb
Last Updated: December 6, 2025
Glenn Wishard, located in Perkins, South Dakota, is a privately owned earth dam that was completed in 1954.
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Summary
The dam, situated on the TR Moreau River, stands at 17 feet in height and has a storage capacity of 143 acre-feet. Managed by the South Dakota Department of Environment and Natural Resources (DENR), this structure is regulated, inspected, and enforced by state authorities to ensure its safety and compliance with regulations.
With a low hazard potential and a current condition assessment of "Not Rated," Glenn Wishard plays a crucial role in water resource management and flood control in the region. Although it has not been assigned an Emergency Action Plan (EAP) or undergone a risk assessment, the dam provides valuable water storage and discharge capabilities, with a maximum discharge capacity of 400 cubic feet per second. Additionally, the dam is associated with the Natural Resources Conservation Service for design purposes, highlighting its importance in sustainable water resource management practices.
The dam's location within the St. Paul District and its association with state and federal agencies underscore its significance in the overall water infrastructure network. As an essential component of the region's water resource and climate resilience efforts, Glenn Wishard stands as a testament to the collaboration between private owners, regulatory agencies, and design entities in safeguarding water resources and mitigating potential hazards. Future assessments and management measures will be crucial in ensuring the continued safety and effectiveness of this vital infrastructure.
Year Completed |
1954 |
Dam Length |
650 |
Dam Height |
17 |
River Or Stream |
TR MOREAU RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
17 |
Nid Storage |
143 |
Hazard Potential |
Low |
Nid Height |
17 |
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.
Glenn Wishard