Roy Mcginnis Reservoir Report
Nearby: Tom Mason Howard Capp
Last Updated: December 6, 2025
Roy Mcginnis is a privately owned dam located in Perkins, South Dakota, along the TR MOREAU RIVER.
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Summary
Built in 1956 by the Natural Resources Conservation Service, this earth dam stands at a height of 33 feet and has a length of 300 feet. With a storage capacity of 308 acre-feet, it serves as a vital water resource for the surrounding area. Despite being rated as having a low hazard potential and not yet assessed for its condition, Roy Mcginnis plays a crucial role in water management and conservation efforts in the region.
Managed by the South Dakota Department of Environment and Natural Resources, Roy Mcginnis is subject to state regulation, permitting, inspection, and enforcement. The dam's primary purpose and associated structures are not specified, but its importance in controlling the flow of the TR MOREAU RIVER and providing water storage cannot be understated. With a maximum discharge capacity of 600 cubic feet per second, the dam ensures the safety of downstream areas during periods of high water flow.
Although Roy Mcginnis has not been recently inspected or assessed for its condition, its strategic location and role in water resource management make it a key asset for climate and water enthusiasts. As a privately owned structure with state oversight, this dam exemplifies the crucial interplay between human infrastructure and environmental stewardship in ensuring sustainable water use and conservation in South Dakota.
Year Completed |
1956 |
Dam Length |
300 |
Dam Height |
33 |
River Or Stream |
TR MOREAU RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
33 |
Nid Storage |
308 |
Hazard Potential |
Low |
Nid Height |
33 |
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.
Roy Mcginnis