C. Peterson No.2 Reservoir Report
Nearby: C. Peterson No.3 C. Peterson No.4
Last Updated: December 13, 2025
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Summary
Peterson No.2 is a privately owned dam located in La Plant, South Dakota, along the TR Moreau River. Built in 1956, this earth dam stands at a height of 19 feet and stretches for 700 feet, with a storage capacity of 207 acre-feet. Despite its low hazard potential, the dam is regulated and inspected by the South Dakota Department of Environment and Natural Resources (DENR) to ensure its safety and compliance with state regulations.
With a normal storage capacity of 90 acre-feet and a maximum discharge of 6000 cubic feet per second, C. Peterson No.2 plays a crucial role in water resource management and flood control in the Dewey County area. While its condition is currently rated as "Not Rated," the dam remains a key infrastructure for the surrounding community. The dam's emergency action plan (EAP) status and risk assessment measures, however, are undetermined, highlighting the need for continued monitoring and preparedness in the face of climate variability and extreme weather events.
As part of the St. Paul District of the US Army Corps of Engineers, C. Peterson No.2 exemplifies the intersection of water resource management, climate resilience, and infrastructure safety. Its presence along the TR Moreau River serves as a vital component of the local ecosystem and agricultural landscape, showcasing the importance of sustainable water management practices in the face of changing climate conditions. With ongoing regulatory oversight and potential risk assessment updates, C. Peterson No.2 remains a significant asset for both water resource enthusiasts and climate advocates alike.
Year Completed |
1956 |
Dam Length |
700 |
Dam Height |
19 |
River Or Stream |
TR MOREAU |
Primary Dam Type |
Earth |
Hydraulic Height |
19 |
Nid Storage |
207 |
Hazard Potential |
Low |
Nid Height |
19 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Moreau R Near Whitehorse Sd
|
35cfs |
Grand R At Little Eagle Sd
|
47cfs |
Oak Cr Near Wakpala Sd
|
10cfs |
Bad R Near Fort Pierre Sd
|
7cfs |
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.
C. Peterson No.2