Stephen Mission Reservoir Report
Nearby: Ambrose Stephan Mission
Last Updated: December 13, 2025
Stephen Mission is a vital water supply dam located in South Dakota, specifically in Hyde County along Campbell Creek.
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Summary
Constructed in 1943, this earth dam stands at 26 feet tall and spans 540 feet in length, providing essential water storage of 260 acre-feet for various purposes including fire protection, livestock, and small fish ponds. Operated by the Tribal Government, this dam serves as a key resource for the local community and is regulated by the state with a low hazard potential.
Despite not being rated for condition assessment, Stephen Mission continues to play a crucial role in water resource management in the region. With a maximum discharge capacity of 9030 cubic feet per second, the dam ensures a reliable water supply for both human and wildlife needs. The dam's location in a remote area underscores its importance in maintaining water security and supporting sustainable development in the region, making it an essential asset for climate and water resource enthusiasts to monitor and protect.
Year Completed |
1943 |
Dam Length |
540 |
Dam Height |
26 |
River Or Stream |
CAMPBELL CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
26 |
Nid Storage |
260 |
Structural Height |
26 |
Hazard Potential |
Low |
Nid Height |
26 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
White R Near Oacoma Sd
|
105cfs |
Bad R Near Fort Pierre Sd
|
7cfs |
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.
Stephen Mission