Scs-Finn Creek Site-020 Reservoir Report
Last Updated: December 13, 2025
SCS-Finn Creek Site-020, located in McClain County, Oklahoma, is a state-regulated earth dam designed by USDA NRCS in 1966 for flood risk reduction on TR-Gaddis Creek.
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Summary
With a height of 30 feet and a length of 1110 feet, the dam has a storage capacity of 416 acre-feet and a normal storage level of 97 acre-feet. The spillway, which is controlled, has a width of 1 foot and can handle a maximum discharge of 1241 cubic feet per second.
Despite being rated as low hazard potential, the dam's risk assessment is classified as very high (1). The condition assessment is not rated, and the last inspection was conducted in 1980 with an inspection frequency of 5 years. The dam has one outlet gate in the form of a valve. Although the emergency action plan (EAP) status is not specified, the dam does not meet EAP guidelines. Overall, SCS-Finn Creek Site-020 serves as a vital infrastructure for flood risk reduction in the area, but there are potential risks that need to be addressed to ensure its long-term functionality and safety.
Year Completed |
1966 |
Dam Length |
1110 |
Dam Height |
30 |
River Or Stream |
TR-GADDIS CR |
Primary Dam Type |
Earth |
Surface Area |
19 |
Hydraulic Height |
30 |
Nid Storage |
416 |
Structural Height |
30 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
30 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Washita River Near Pauls Valley
|
327cfs |
Walnut Creek At Purcell
|
28cfs |
Canadian River At Purcell
|
201cfs |
North Criner Creek Near Criner
|
1cfs |
Canadian River At Norman
|
213cfs |
Washita River At Alex
|
236cfs |
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-Finn Creek Site-020