Oknoname 113114 Reservoir Report

Last Updated: December 15, 2025

Oknoname 113114, located in Pawhuska, Oklahoma, is a privately owned dam regulated by the Oklahoma Water Resources Board.


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Summary

Completed in 1940, this earth dam stands at a height of 35 feet and has a hydraulic height of 30 feet, serving the primary purpose of water storage on the TR-Bluestem Lake. With a storage capacity of 200 acre-feet and a normal storage level of 120 acre-feet, this dam plays a crucial role in managing water resources in the area.

Despite being classified as low hazard potential, Oknoname 113114 is considered to have a very high risk assessment rating, highlighting the importance of effective risk management measures. The dam features a controlled spillway and one valve outlet gate for operational control. With a maximum discharge capacity of 2230 cubic feet per second, this structure is equipped to handle significant water flow during periods of high precipitation. Although the condition assessment is currently listed as "Not Rated," regular inspections are conducted, with the last inspection taking place in June 2003.

As an integral part of the water infrastructure in Osage County, Oknoname 113114 serves as a vital resource for water supply and flood control in the region. With its historical significance and ongoing regulatory oversight, this dam exemplifies the intersection of human ingenuity and environmental stewardship in managing water resources and climate impacts in Oklahoma.

Year Completed

1940

Dam Length

320

Dam Height

35

River Or Stream

TR-BLUESTEM LAKE

Primary Dam Type

Earth

Surface Area

7

Hydraulic Height

30

Nid Storage

200

Structural Height

35

Outlet Gates

Valve - 1

Hazard Potential

Low

Foundations

Soil

Nid Height

35
       
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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.