Scs-Stillwater Creek Site-34 Reservoir Report

Last Updated: December 7, 2025

SCS-Stillwater Creek Site-34 is a state-regulated dam located in the city of Stillwater, Oklahoma, along the TR-STILLWATER CREEK.


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Summary

Built in 1975 by USDA NRCS, this dam serves as a flood risk reduction structure with a primary purpose of protecting the surrounding area from potential water hazards. With an earth dam type standing at 25 feet tall and 690 feet long, this structure has a storage capacity of 231 acre-feet and a controlled spillway system to manage water flow during high-intensity events.

Although classified as having a low hazard potential, the risk assessment for SCS-Stillwater Creek Site-34 ranks it as very high (1), prompting the need for regular inspections and maintenance. Despite not having a current condition assessment, the dam's emergency action plan status and risk management measures remain unknown. With a single valve outlet gate and outdated inspection records dating back to 1980, there is a pressing need for updated risk assessment and emergency preparedness protocols to ensure the safety and integrity of this critical water resource infrastructure in Payne County, Oklahoma.

As water resource and climate enthusiasts, it is crucial to monitor the condition and risk factors associated with SCS-Stillwater Creek Site-34 to protect the surrounding community and environment from potential flooding events. With the dam's location along TR-STILLWATER CREEK and under the jurisdiction of the OWRB, stakeholders must prioritize the implementation of modern inspection protocols, risk mitigation strategies, and emergency response plans to address the high-risk nature of this aging infrastructure. By collaborating with state and federal agencies, including the Natural Resources Conservation Service, efforts can be made to ensure the long-term safety and effectiveness of this flood risk reduction structure in a rapidly changing climate.

Year Completed

1975

Dam Length

690

Dam Height

25

River Or Stream

TR-STILLWATER CREEK

Primary Dam Type

Earth

Surface Area

8

Hydraulic Height

25

Nid Storage

231

Structural Height

25

Outlet Gates

Valve - 1

Hazard Potential

Low

Foundations

Soil

Nid Height

25
       
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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.