Oknoname 125006 Reservoir Report

Last Updated: December 8, 2025

Oknoname 125006 is a privately owned earth dam located in Pottawatomie, Oklahoma, near the city of HARJO.


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Summary

Built in 1957, this dam stands at a height of 22 feet and has a length of 380 feet, with a storage capacity of 72 acre-feet. It serves as a barrier on the TR-LITTLE RIVER, with a controlled spillway and a maximum discharge of 1040 cubic feet per second.

Despite being classified as having a low hazard potential, Oknoname 125006 is considered to have a very high risk due to its condition assessment being marked as "Not Rated". The dam has not been inspected since May 2011, with an inspection frequency of 5 years. It is noteworthy that the dam has one valve outlet gate and is situated in an area with a high flood risk, which elevates its risk assessment to a level 1.

Overall, Oknoname 125006 presents an intriguing case study for water resource and climate enthusiasts, as it exemplifies the complex balance between infrastructure development, regulatory oversight, and risk management in maintaining the safety and functionality of dams in the face of changing environmental conditions. Its location in Oklahoma, amidst a network of rivers and streams, underscores the importance of monitoring and maintaining such structures to ensure the safety of surrounding communities and the protection of valuable water resources.

Year Completed

1957

Dam Length

380

Dam Height

22

River Or Stream

TR-LITTLE RIVER

Primary Dam Type

Earth

Surface Area

3

Hydraulic Height

22

Nid Storage

72

Structural Height

22

Outlet Gates

Valve - 1

Hazard Potential

Low

Foundations

Soil

Nid Height

22
       
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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.