State Of South Dakota Reservoir Report
Last Updated: December 13, 2025
The State of South Dakota is home to a significant water resource in the form of a dam completed in 1954 with a height of 12 feet and a storage capacity of 115 acre-feet.
°F
°F
mph
Wind
%
Humidity
Summary
Situated in Potter County, South Dakota, this earth dam serves multiple purposes and is regulated by the state agency DANR. With a low hazard potential and a moderate risk assessment rating, this dam plays a crucial role in water management and flood control in the region.
Managed by the state government, this dam has a spillway width of 60 feet and a maximum discharge capacity of 780 cubic feet per second. Although its condition is currently not rated, regular inspections are conducted every three years to ensure its safety and functionality. The dam's emergency action plan status and risk management measures are not specified, indicating a need for further assessment and preparedness in the face of potential risks and emergencies.
Located within the St. Paul District, the State of South Dakota's dam presents an opportunity for water resource and climate enthusiasts to engage with the complexities of water management and infrastructure in the region. As a vital component of the state's water infrastructure, this dam underscores the importance of ongoing monitoring, assessment, and preparedness to safeguard against potential hazards and ensure the sustainable management of water resources in South Dakota.
Year Completed |
1954 |
Dam Length |
1280 |
Dam Height |
12 |
River Or Stream |
TR-MISSONot RatedI |
Primary Dam Type |
Earth |
Hydraulic Height |
12 |
Nid Storage |
115 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
12 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Moreau R Near Whitehorse Sd
|
35cfs |
Bad R Near Fort Pierre Sd
|
7cfs |
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.
State Of South Dakota