Wesley Beaman Reservoir Report
Nearby: George Tnot Ratedner Leo Berens
Last Updated: December 13, 2025
Wesley Beaman is a privately owned dam located in Walworth, South Dakota, with a state jurisdiction and regulatory oversight by the South Dakota Department of Environment and Natural Resources (DENR).
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Summary
Completed in 1954, this earth dam stands at a height of 28 feet and spans 400 feet in length, providing a maximum storage capacity of 65 acre-feet. With a low hazard potential and a condition assessment that is currently not rated, Wesley Beaman serves as a vital resource for water management and flood control in the region.
Managed by a private entity, Wesley Beaman is subject to state permitting, inspection, and enforcement regulations to ensure its structural integrity and operational efficiency. Positioned along the TR-MISSO river or stream under the purview of the St. Paul District of the US Army Corps of Engineers, this dam plays a crucial role in water resource management in the area. Despite not having a designated primary purpose, Wesley Beaman serves as a key infrastructure supporting various water-related activities in South Dakota.
With a history dating back to the mid-20th century, Wesley Beaman continues to fulfill its role as a reliable water management structure, with a focus on maintaining its operational effectiveness and safety standards. As a significant feature within the local water resource network, it highlights the importance of private ownership in contributing to sustainable water management practices and climate adaptation efforts in the region.
Year Completed |
1954 |
Dam Length |
400 |
Dam Height |
28 |
River Or Stream |
TR-MISSONot RatedI |
Primary Dam Type |
Earth |
Hydraulic Height |
28 |
Nid Storage |
65 |
Hazard Potential |
Low |
Nid Height |
28 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Oak Cr Near Wakpala Sd
|
10cfs |
Grand R At Little Eagle Sd
|
47cfs |
Moreau R Near Whitehorse Sd
|
35cfs |
Beaver Creek Bl Linton
|
39cfs |
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.
Wesley Beaman