Scs-Caston Mountain Creek Site-4 Reservoir Report
Last Updated: December 5, 2025
SCS-Caston Mountain Creek Site-4, located in Le Flore County, Oklahoma, is a state-regulated earth dam constructed in 1971 by the USDA NRCS.
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Summary
The dam stands at a height of 77 feet and spans a length of 2250 feet, with a storage capacity of 8100 acre-feet and a surface area of 40 acres. It serves as a crucial flood risk reduction structure on Mountain Creek, with a maximum discharge capacity of 35,000 cubic feet per second.
Despite being classified as having a high hazard potential, the dam is currently in fair condition according to the last inspection in December 2011. Emergency action plans have not been prepared, raising concerns regarding the readiness for potential risk mitigation in case of a failure event. The risk assessment for the dam is rated as very high, emphasizing the importance of proactive maintenance and monitoring to ensure the safety and integrity of the structure for both downstream communities and the surrounding environment.
With the primary purpose of flood risk reduction, SCS-Caston Mountain Creek Site-4 plays a vital role in water resource management in the region. As climate change continues to impact precipitation patterns and intensify extreme weather events, the resilience and maintenance of such infrastructure are crucial to safeguarding communities and ecosystems against the threats of flooding. Continued monitoring, assessment, and risk management measures will be essential to ensure the long-term effectiveness and safety of this important water resource structure.
Year Completed |
1971 |
Dam Length |
2250 |
Dam Height |
77 |
River Or Stream |
MOUNTAIN CREEK |
Primary Dam Type |
Earth |
Surface Area |
40 |
Hydraulic Height |
77 |
Drainage Area |
937 |
Nid Storage |
8100 |
Structural Height |
77 |
Outlet Gates |
Slide (sluice gate) - 1 |
Hazard Potential |
High |
Foundations |
Rock |
Nid Height |
77 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Poteau River Near Panama
|
483cfs |
Poteau River At Loving
|
113cfs |
Fourche Maline Near Red Oak
|
1cfs |
James Fork Near Hackett
|
32cfs |
Black Fork Below Big Creek Nr Page
|
4cfs |
Poteau River At Cauthron
|
111cfs |
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.
Wards Landing - Lake Wister State Park
Victor Area - Lake Wister State Park
Quarry Island - Lake Wister State Park
Below the Dam - Lake Wister State Park
Scs-Caston Mountain Creek Site-4