Oknoname 22295 Reservoir Report

Last Updated: December 17, 2025

Oknoname 22295 is a privately owned earth dam located in Hennessey, Oklahoma.


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Summary

Constructed in 1999 by USDA NRCS, this dam on Lyon Creek has a height of 16.6 feet and a storage capacity of 138.88 acre-feet. With a low hazard potential and a very high risk assessment rating, it is regulated by the Oklahoma Water Resources Board and undergoes regular inspections, with the last one conducted in January 2010.

The dam's primary purpose is listed as "Other", and it serves as a crucial structure for water resource management in the area. The spillway type is controlled, and the dam features a single valve outlet gate. Despite its modest size with a surface area of 13.1 acres, Oknoname 22295 plays a significant role in flood control and water supply management for the surrounding Kingfisher County community.

Owned and maintained by a private entity, Oknoname 22295 stands as a testament to responsible water infrastructure development in Oklahoma. With its state-regulated status and emphasis on safety measures, this dam serves as a vital component in the region's overall water resource and climate resilience strategy.

Year Completed

1999

Dam Length

800

Dam Height

16.6

River Or Stream

LYON CREEK

Primary Dam Type

Earth

Surface Area

13.1

Hydraulic Height

21.2

Drainage Area

390

Nid Storage

138.88

Structural Height

14.7

Outlet Gates

Valve - 1

Hazard Potential

Low

Foundations

Soil

Nid Height

21
       
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.