Roy Brown Reservoir Report
Nearby: Simons Bros. Joe Wiesinger
Last Updated: December 6, 2025
Roy Brown is a privately owned earth dam located in Perkins, South Dakota, along the TR-GRAND RIVER.
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Summary
Built in 1956, this dam stands at 19 feet high and has a storage capacity of 55 acre-feet. With a low hazard potential and a condition assessment of "Not Rated," Roy Brown plays a crucial role in water resource management in the region.
Managed by the South Dakota Department of Environment and Natural Resources (DENR), Roy Brown is subject to state regulations, permitting, inspection, and enforcement. Although the dam has not been rated for condition assessment, its low hazard potential indicates that it poses minimal risk to the surrounding community. With a maximum discharge of 2400 cubic feet per second, this dam serves as a vital structure for flood control and water storage in the area.
Despite its age, Roy Brown continues to fulfill its primary purpose of water retention and management. As a significant infrastructure project in South Dakota, this dam showcases the importance of maintaining and monitoring water resources in the face of changing climate conditions. The presence of Roy Brown highlights the ongoing efforts to ensure the sustainability and resilience of water systems in the region.
Year Completed |
1956 |
Dam Length |
570 |
Dam Height |
19 |
River Or Stream |
TR-GRAND RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
19 |
Nid Storage |
55 |
Hazard Potential |
Low |
Nid Height |
19 |
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 Brown