W.F. Collins Reservoir Report
Nearby: M. Schremp Don Farlee
Last Updated: December 7, 2025
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Summary
Collins is a privately owned dam located on the TR MOREAU river in Dewey, South Dakota. Completed in 1937, this earth dam stands at a height of 19 feet and has a length of 500 feet, providing a storage capacity of 138 acre-feet. The dam is regulated by the South Dakota Department of Environment and Natural Resources (DENR) and is subject to regular inspections, with a low hazard potential rating.
Despite its age, W.F. Collins has not been rated for its condition, indicating a need for further assessment. The dam's primary purpose and associated structures are not specified, but its location in a rural area suggests a focus on agricultural irrigation or flood control. With a maximum discharge capacity of 1400 cubic feet per second, the dam plays a crucial role in managing water resources in the region.
As a key feature in the St. Paul District of the US Army Corps of Engineers, W.F. Collins contributes to the overall water management strategy in South Dakota. While its risk assessment and emergency preparedness status are not provided, the dam remains a vital component of the local infrastructure and a point of interest for water resource and climate enthusiasts in the region.
Year Completed |
1937 |
Dam Length |
500 |
Dam Height |
19 |
River Or Stream |
TR MOREAU |
Primary Dam Type |
Earth |
Hydraulic Height |
19 |
Nid Storage |
138 |
Hazard Potential |
Low |
Nid Height |
19 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Moreau R Near Whitehorse Sd
|
35cfs |
Moreau R Near Faith Sd
|
14cfs |
Cheyenne R Near Plainview Sd
|
0cfs |
Grand R At Little Eagle Sd
|
47cfs |
Oak Cr Near Wakpala Sd
|
10cfs |
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.
W.F. Collins