Oknoname 087029 Reservoir Report

Last Updated: December 17, 2025

Oknoname 087029 is a privately owned dam located in McClain County, Oklahoma, specifically in the city of Washington.


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Summary

Built in 1950, this earth dam stands at a height of 22 feet and has a length of 310 feet. It serves a variety of purposes and has a maximum storage capacity of 95 acre-feet, with a normal storage level of 37 acre-feet.

The dam is regulated by the Oklahoma Water Resources Board (OWRB) and is subject to state jurisdiction, permitting, inspection, and enforcement. It has a controlled spillway and is classified as having a low hazard potential. Despite being in a risk area with very high risk assessment, the dam's condition is currently rated as "Not Rated" and it has not undergone a recent condition assessment.

Overall, Oknoname 087029 is a significant water resource structure in the area, providing essential storage capacity in the Walnut Creek watershed. Its design and construction details, as well as its regulatory oversight, make it a critical component of water management in the region. Climate and water resource enthusiasts will find its history and operational details intriguing for further study and analysis.

Year Completed

1950

Dam Length

310

Dam Height

22

River Or Stream

TR-WALNUT CR

Primary Dam Type

Earth

Surface Area

4

Hydraulic Height

22

Nid Storage

95

Structural Height

22

Outlet Gates

Valve - 1

Hazard Potential

Low

Foundations

Soil

Nid Height

22
       
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.