Scs-Winter Creek Site-12 Reservoir Report
Last Updated: December 8, 2025
SCS-Winter Creek Site-12 is a state-regulated earth dam located in Grady, Oklahoma, with a primary purpose of flood risk reduction along the TR-LAFLIN CR river/stream.
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Summary
Built in 1965 by the USDA NRCS, this dam stands at 30 feet high with a hydraulic height of 28 feet and a length of 920 feet. It has a normal storage capacity of 47 acre-feet and a maximum storage of 367 acre-feet, providing crucial protection to the surrounding area from potential flooding events.
Despite its low hazard potential, SCS-Winter Creek Site-12 is rated as having a very high risk due to its age and lack of recent condition assessments. The dam features a controlled spillway and a single valve outlet gate, with a maximum discharge capacity of 960 cubic feet per second. While the last inspection was conducted in 1980, state permitting, inspection, and enforcement agencies continue to oversee the dam's operations to ensure its structural integrity and readiness for emergencies. With its significant flood risk reduction capabilities and importance to the local community, SCS-Winter Creek Site-12 remains a critical water resource infrastructure in Oklahoma.
Year Completed |
1965 |
Dam Length |
920 |
Dam Height |
30 |
River Or Stream |
TR-LAFLIN CR |
Primary Dam Type |
Earth |
Surface Area |
12 |
Hydraulic Height |
28 |
Nid Storage |
367 |
Structural Height |
30 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
30 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Washita River At Alex
|
241cfs |
North Criner Creek Near Criner
|
1cfs |
Little Washita River East Of Ninnekah
|
18cfs |
Walnut Creek At Purcell
|
29cfs |
Canadian River At Purcell
|
208cfs |
Canadian River At Norman
|
211cfs |
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-Winter Creek Site-12