Scs-Sandy Creek Site-30 Reservoir Report
Last Updated: December 8, 2025
SCS-Sandy Creek Site-30 is a state-regulated earth dam located in Pontotoc, Oklahoma, specifically in the city of ADA.
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Summary
Built in 1959 by the USDA NRCS, this dam serves the primary purpose of flood risk reduction along the TR-SPRING BROOK CREEK. Standing at a height of 32 feet and with a length of 600 feet, it has a storage capacity of 533 acre-feet and a normal storage of 50 acre-feet. The dam features a controlled spillway and is equipped with a single valve outlet gate.
Despite its low hazard potential, SCS-Sandy Creek Site-30 is classified as a very high risk by the Risk Assessment scale, indicating the need for close monitoring and potential risk management measures. The dam has not been rated for its current condition, with its last inspection dating back to 1980. The structure is inspected every five years, and while it meets state permitting and inspection requirements, its Emergency Action Plan and risk management measures are yet to be fully assessed and updated. Overall, this site presents an intriguing case study for water resource and climate enthusiasts, showcasing the importance of maintaining and evaluating infrastructure for flood risk reduction in the face of changing environmental conditions.
Year Completed |
1959 |
Dam Length |
600 |
Dam Height |
32 |
River Or Stream |
TR-SPRING BROOK CREEK |
Primary Dam Type |
Earth |
Surface Area |
11 |
Hydraulic Height |
32 |
Nid Storage |
533 |
Structural Height |
32 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
32 |
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-Sandy Creek Site-30