Waggoner Reservoir Report
Nearby: Sunshine Sd Noname 236
Last Updated: December 5, 2025
Waggoner is a significant earth dam located in Haakon, South Dakota, along the Grindstone Creek.
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Summary
Built in 1940, this dam stands at a height of 27 feet and has a storage capacity of 2022 acre-feet. With a drainage area of 60 square miles, Waggoner plays a crucial role in managing water resources in the region, with a maximum discharge capacity of 4075 cubic feet per second.
Managed by the St. Paul District of the US Army Corps of Engineers, Waggoner is regulated and permitted by the South Dakota Department of Agriculture and Natural Resources. Despite its age, Waggoner is considered to have moderate risk, with a significant hazard potential. The dam has not been rated for its condition assessment, but it undergoes inspections every three years to ensure its safety and integrity.
With its uncontrolled spillway and absence of outlet gates, Waggoner is a vital infrastructure for flood control and water management in the area. As water resource and climate enthusiasts, understanding the design, purpose, and risk profile of dams like Waggoner is crucial for effective management and conservation of our precious water resources.
Year Completed |
1940 |
Dam Length |
800 |
Dam Height |
27 |
River Or Stream |
GRINDSTONE CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
27 |
Drainage Area |
60 |
Nid Storage |
2022 |
Outlet Gates |
None |
Hazard Potential |
Significant |
Foundations |
Soil |
Nid Height |
27 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
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.
Waggoner