Oknoname 095004 Reservoir Report

Last Updated: December 6, 2025

Oknoname 095004 is a privately owned dam located in Mannsville, Oklahoma, along the TR-Cedar Creek.


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Summary

Built in 1955, this Earth-type dam stands at a height of 24 feet with a length of 480 feet, providing a storage capacity of 390 acre-feet. With a controlled spillway and a maximum discharge of 1600 cubic feet per second, this dam serves multiple purposes, including flood control and water storage for the surrounding area.

Managed by the Oklahoma Water Resources Board, Oknoname 095004 has a low hazard potential and is currently rated as "Not Rated" in terms of condition assessment. Despite its age, the dam has not undergone any modifications and is inspected every five years. The risk assessment for this dam is classified as "Very High (1)", pointing to the need for effective risk management measures to ensure the safety and longevity of the structure.

The surrounding community, represented by Congressman Markwayne Mullin, relies on the effective operation and maintenance of Oknoname 095004 for water supply and flood protection. With its strategic location and vital role in water management, this dam serves as a valuable asset in safeguarding the local ecosystem and supporting sustainable development in Marshall County, Oklahoma.

Year Completed

1955

Dam Length

480

Dam Height

24

River Or Stream

TR-CEDAR CREEK

Primary Dam Type

Earth

Surface Area

11

Hydraulic Height

24

Nid Storage

390

Structural Height

24

Outlet Gates

Valve - 1

Hazard Potential

Low

Foundations

Soil

Nid Height

24
       
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.