Scs-Stillwater Creek Site-28 Reservoir Report

Last Updated: December 7, 2025

SCS-Stillwater Creek Site-28, also known as Hazen Lake, is a state-owned dam located in Payne County, Oklahoma.


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Summary

Built in 1964 by the USDA NRCS, this Earth-type dam serves the primary purpose of flood risk reduction along the TR-Boomer Creek. With a height of 25 feet and a length of 1090 feet, the dam has a storage capacity of 542 acre-feet and covers a surface area of 8 acres.

This dam is under the regulatory jurisdiction of the Oklahoma Water Resources Board and is subject to state permitting, inspection, and enforcement. Despite being classified as having a high hazard potential, the dam is currently assessed to be in fair condition. However, the risk assessment indicates a very high risk level, emphasizing the importance of ongoing monitoring and maintenance to ensure the safety and functionality of the structure. With a controlled spillway and a single slide gate outlet, SCS-Stillwater Creek Site-28 plays a crucial role in managing water resources and mitigating flood risks in the area.

Overall, SCS-Stillwater Creek Site-28 is a significant infrastructure project designed to protect the surrounding communities from flooding events. With its strategic location and design features, this dam contributes to the overall water management efforts in the region. As water resource and climate enthusiasts, staying informed about the condition and management of such critical structures is essential for ensuring the resilience and safety of our water infrastructure in the face of changing environmental conditions.

Year Completed

1964

Dam Length

1090

Dam Height

25

River Or Stream

TR-BOOMER CREEK

Primary Dam Type

Earth

Surface Area

8

Hydraulic Height

25

Drainage Area

3.22

Nid Storage

542

Structural Height

25

Outlet Gates

Slide (sluice gate) - 1

Hazard Potential

High

Foundations

Rock

Nid Height

25
       
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.