Penrhos Farms #1 Reservoir Report
Nearby: Penrhos Farms #2 Penrhos Farms #5
Last Updated: December 13, 2025
Penrhos Farms #1 is a privately owned dam located in Marshall, South Dakota, along the tributary of Wild Rice Creek.
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Summary
Built in 1982, this earthen dam stands at a height of 24 feet and has a storage capacity of 270 acre-feet. While the dam's primary purpose is not specified, it is regulated by the South Dakota Department of Environment and Natural Resources (DENR) and undergoes regular inspections, enforcement, and permitting processes to ensure its safety and compliance with state regulations.
With a low hazard potential and a current condition assessment of "Not Rated," Penrhos Farms #1 poses minimal risk to the surrounding area. The dam has not been modified in recent years, and there is no Emergency Action Plan (EAP) in place for the structure. Despite these factors, the dam is equipped with outlet gates and a maximum discharge capacity of 4,160 cubic feet per second. The dam's location and design make it an essential component of the local water resource infrastructure, providing storage and regulation for the surrounding drainage area.
Although the dam's associated structures, inspection frequency, and maintenance details are not provided in the data, Penrhos Farms #1 remains a key feature in the region's water management system. As climate and water resource enthusiasts, understanding the importance of dams like Penrhos Farms #1 in regulating water flow, preventing flooding, and ensuring water security is crucial for sustainable water management practices in South Dakota.
Year Completed |
1982 |
Dam Length |
700 |
Dam Height |
24 |
River Or Stream |
TRIB. WILD RICE CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
24 |
Nid Storage |
270 |
Hazard Potential |
Low |
Nid Height |
24 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Wild Rice River Nr Rutland
|
21cfs |
James River At Nd-Sd State Line
|
194cfs |
James R At Columbia Sd
|
268cfs |
Elm R At Westport Sd
|
12cfs |
Bear Creek Nr Oakes
|
5cfs |
Maple R At Nd-Sd State Line
|
5cfs |
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.
Penrhos Farms #1