Scs-Winter Creek Site-11 Reservoir Report
Last Updated: December 8, 2025
SCS-Winter Creek Site-11, located in Grady County, Oklahoma, is a state-regulated earth dam designed by the USDA NRCS and completed in 1965 for the primary purpose of flood risk reduction along the TR-LAFLIN CR stream.
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Summary
Standing at a height of 29 feet with a hydraulic height of 27 feet, this dam boasts a storage capacity of 286 acre-feet and a maximum discharge rate of 797 cubic feet per second. With a controlled spillway and a low hazard potential, this dam plays a crucial role in managing water resources in the region.
Despite being last inspected in 1980, SCS-Winter Creek Site-11 is reported to be in a "Not Rated" condition assessment status, indicating the need for further evaluation to ensure its structural integrity and effectiveness in flood risk mitigation. The risk assessment for this dam is categorized as "Very High (1)", highlighting the importance of ongoing monitoring and maintenance to prevent potential hazards. With the dam under state jurisdiction and subject to inspection, enforcement, and permitting by the Oklahoma Water Resources Board, it serves as a key infrastructure for water resource management in the area and underscores the intersection of water conservation and climate resilience.
Year Completed |
1965 |
Dam Length |
1480 |
Dam Height |
29 |
River Or Stream |
TR-LAFLIN CR |
Primary Dam Type |
Earth |
Surface Area |
11 |
Hydraulic Height |
27 |
Nid Storage |
286 |
Structural Height |
29 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
29 |
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-11