Oknoname 149001 Reservoir Report

Last Updated: December 6, 2025

Oknoname 149001 is a privately owned earth dam located in Cloud Chief, Oklahoma, along the TR-Washita River.


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Summary

Completed in 1970 for flood risk reduction, this structure stands at a height of 34 feet with a hydraulic height of 31 feet. With a storage capacity of 112 acre-feet, it serves as a vital asset in managing water resources in the area.

Although the dam has a low hazard potential, it is categorized as having a very high risk due to its critical role in flood risk reduction. The structure has not been rated for its condition assessment, but it undergoes regular inspections every five years to ensure its integrity. Equipped with a controlled spillway and a single valve outlet gate, Oknoname 149001 plays a crucial role in protecting the surrounding Washita, Oklahoma community from potential flooding events.

Managed by the Oklahoma Water Resources Board (OWRB), this dam exemplifies the collaborative efforts between private owners and state regulatory agencies in safeguarding water resources and mitigating climate-related risks. As climate change continues to impact water availability and flood patterns, structures like Oknoname 149001 are essential for protecting communities and enhancing resilience in the face of evolving environmental challenges.

Year Completed

1970

Dam Length

420

Dam Height

34

River Or Stream

TR-WASHITA RIVER

Primary Dam Type

Earth

Surface Area

1

Hydraulic Height

31

Nid Storage

112

Structural Height

34

Outlet Gates

Valve - 1

Hazard Potential

Low

Foundations

Soil

Nid Height

34
       
Seasonal Comparison

Weather Forecast

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.