Scs-Nine Mile Creek Site-13 Reservoir Report
Last Updated: December 8, 2025
SCS-Nine Mile Creek Site-13 is a state-regulated earth dam located in Oklahoma, specifically in Roger Mills County near the city of Strong City.
°F
°F
mph
Wind
%
Humidity
Summary
Built in 1964 by the USDA NRCS, this dam serves the primary purpose of flood risk reduction along the TR-Washita River. Standing at a height of 34 feet with a hydraulic height of 31 feet, it has a storage capacity of 263 acre-feet and a normal storage level of 94 acre-feet. The dam's controlled spillway and valve outlet gate contribute to its low hazard potential, although its risk assessment remains very high.
Managed by the OWRB, this dam has not been inspected since 1980 and is currently rated as "Not Rated" in terms of its condition assessment. Despite its age, the dam has not undergone any modifications and does not have an Emergency Action Plan (EAP) in place. The risk management measures for SCS-Nine Mile Creek Site-13 remain unspecified, raising concerns about the dam's ability to withstand potential hazards. With a risk assessment indicating a very high risk rating, there is a pressing need for updated inspections, condition assessments, and the development of an EAP to ensure the safety and resilience of this critical infrastructure in the face of changing climate conditions and water resource challenges.
Year Completed |
1964 |
Dam Length |
650 |
Dam Height |
34 |
River Or Stream |
TR-WASHITA RIVER |
Primary Dam Type |
Earth |
Surface Area |
18 |
Hydraulic Height |
31 |
Nid Storage |
263 |
Structural Height |
34 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
34 |
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-13