C. Peterson No.4 Reservoir Report
Nearby: R. Bartels No.1 C. Peterson No.3
Last Updated: December 13, 2025
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Summary
Peterson No.4 is a privately owned earth dam located in Dewey County, South Dakota, along the TR MOREAU river. Built in 1940, this dam stands at a height of 15 feet and spans 500 feet in length, with a storage capacity of 88 acre-feet. Although it has a low hazard potential and is currently rated as "Not Rated" in terms of condition assessment, the dam is regulated and inspected by the South Dakota Department of Environment and Natural Resources.
Despite its age, C. Peterson No.4 continues to serve its primary purpose of water resource management effectively, with a maximum discharge capacity of 1200 cubic feet per second. The dam plays a crucial role in regulating water flow and storage in the area, contributing to the overall ecological balance and climate resilience of the region. With state jurisdiction and regulatory oversight in place, the dam ensures the safety and sustainability of its operations for the surrounding community of LA PLANT.
As water resource and climate enthusiasts, understanding the infrastructure and impact of dams like C. Peterson No.4 is essential for promoting sustainable water management practices and mitigating the effects of climate change. By keeping a close eye on the condition and regulatory framework surrounding these structures, we can work towards enhancing water security and resilience in the face of evolving environmental challenges.
Year Completed |
1940 |
Dam Length |
500 |
Dam Height |
15 |
River Or Stream |
TR MOREAU |
Primary Dam Type |
Earth |
Hydraulic Height |
15 |
Nid Storage |
88 |
Hazard Potential |
Low |
Nid Height |
15 |
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.4