Scs-Nine Mile Creek Site-15 Reservoir Report
Last Updated: December 9, 2025
SCS-Nine Mile Creek Site-15, located in Roger Mills County, Oklahoma, is a state-owned Earth dam designed by the USDA NRCS with a primary purpose of Flood Risk Reduction.
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Summary
Completed in 1964, this dam stands at a height of 40 feet and has a storage capacity of 415 acre-feet, with a surface area of 22 acres. The dam is regulated by the Oklahoma Water Resources Board (OWRB) and has state permitting, inspection, and enforcement in place to ensure its functionality and safety.
Situated along the TR-Washita River, this dam plays a crucial role in mitigating flood risks in the area, with a controlled spillway type and a maximum discharge capacity of 1836 cubic feet per second. Despite being classified as having a low hazard potential, the dam is considered to have a very high risk level, indicating the importance of proper risk management measures. While the condition assessment is currently listed as "Not Rated," regular inspections are conducted to monitor the dam's integrity and functionality, with an inspection frequency of 5 years set in place.
Overall, SCS-Nine Mile Creek Site-15 serves as a vital infrastructure for flood control in Roger Mills County, Oklahoma. With its strategic location and design, this dam continues to play a significant role in protecting the surrounding area from potential flooding events. As climate change brings about more extreme weather patterns, the importance of maintaining and managing water resources like this dam becomes increasingly critical for ensuring the resilience of communities in the face of climate-related challenges.
Year Completed |
1964 |
Dam Length |
850 |
Dam Height |
40 |
River Or Stream |
TR-WASHITA RIVER |
Primary Dam Type |
Earth |
Surface Area |
22 |
Hydraulic Height |
37 |
Nid Storage |
415 |
Structural Height |
40 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
40 |
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.
Scs-Nine Mile Creek Site-15