Williams 783 Reservoir Report
Nearby: Petersen Dam Williams No 3 (Nid)
Last Updated: December 13, 2025
Williams 783, located in South Dakota along Timber Creek, is a Federal-owned Earth dam with a height of 14 feet and a storage capacity of 85 acre-feet.
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Summary
Built in 1938, this low hazard potential dam stands at 270 feet long and plays a critical role in water resource management in the area. Despite its age, the dam's condition is currently not rated, highlighting the need for further assessment and potential maintenance to ensure its long-term functionality.
Managed by the St. Paul District of the US Army Corps of Engineers, Williams 783 serves as a vital infrastructure for flood control and water storage. With a maximum discharge capacity of 1500 cubic feet per second, the dam contributes to the overall resilience of the region against extreme weather events and climate variability. While it has not been inspected since 1978, the dam's low hazard potential indicates a relatively low level of risk, though regular assessments and maintenance are essential to uphold its structural integrity.
As climate change continues to impact water resources and weather patterns, the role of dams like Williams 783 becomes increasingly significant in managing water supply and mitigating flood risks. With its historical significance and operational importance, this Federal-owned dam stands as a testament to the ongoing efforts to adapt to a changing climate while maintaining critical infrastructure for the benefit of the community and the environment.
Year Completed |
1938 |
Dam Length |
270 |
Dam Height |
14 |
River Or Stream |
TIMBER CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
14 |
Nid Storage |
85 |
Hazard Potential |
Low |
Nid Height |
14 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Bad R Near Fort Pierre Sd
|
7cfs |
White R Near Oacoma Sd
|
105cfs |
White River Near White River
|
42cfs |
Little White R Below White River Sd
|
141cfs |
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.
Williams 783