Scs-Rock Creek Site-11 Reservoir Report

Last Updated: December 16, 2025

SCS-Rock Creek Site-11, located in Sulphur, Oklahoma, is a state-regulated earth dam designed by USDA NRCS with a primary purpose of flood risk reduction.


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Summary

Completed in 1962, this dam on TR-Rock Creek stands at a height of 23 feet with a hydraulic height of 20 feet. It has a storage capacity of 172 acre-feet and a normal storage level of 90 acre-feet, serving to protect the surrounding area from potential flooding events.

Managed by the Oklahoma Water Resources Board, this low hazard potential dam is equipped with a controlled spillway and a single valve outlet gate for water release. Despite being last inspected in 1980, the dam's risk assessment remains at a very high level (1), indicating the importance of ongoing monitoring and maintenance. With a risk management plan yet to be established, there is a need for continued attention to ensure the safety and effectiveness of this essential infrastructure for water resource management in the region.

Year Completed

1962

Dam Length

970

Dam Height

23

River Or Stream

TR-ROCK CREEK

Primary Dam Type

Earth

Surface Area

5

Hydraulic Height

20

Nid Storage

172

Structural Height

23

Outlet Gates

Valve - 1

Hazard Potential

Low

Foundations

Soil

Nid Height

23
       
Seasonal Comparison

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Dam Data Reference

Condition Assessment

Satisfactory
No 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

High
Dams 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.