Oknoname 103004 Reservoir Report

Last Updated: December 7, 2025

Oknoname 103004, located in Morrison, Oklahoma, is a privately owned dam constructed in 1960 on TR-Long Branch Creek.


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Summary

This earth dam stands at 19 feet in height and spans a length of 505 feet, providing a storage capacity of 120 acre-feet. With a controlled spillway and a low hazard potential, this dam is regulated by the Oklahoma Water Resources Board and undergoes regular inspections and enforcement measures to ensure its safety and compliance with state regulations.

Although the dam has not been rated for its condition assessment, it is classified as having a very high risk due to its age and potential for downstream impacts. Despite the lack of emergency action planning and inundation maps, the dam is equipped with a single valve outlet gate for controlled water release. While the risk management measures and DSAC assignment dates are not specified, the dam's risk level is closely monitored to prevent any potential hazards or failures that could impact the surrounding Noble County community.

Overall, Oknoname 103004 serves a primary purpose other than flood control or water supply, with a normal storage capacity of 46 acre-feet and a surface area of 5 acres. With Congressman Frank D. Lucas representing the area, this dam plays a crucial role in managing water resources in the region, highlighting the importance of proper maintenance and risk assessment for sustainable water management practices in Oklahoma.

Year Completed

1960

Dam Length

505

Dam Height

19

River Or Stream

TR-LONG BRANCH CREEK

Primary Dam Type

Earth

Surface Area

5

Hydraulic Height

19

Nid Storage

120

Structural Height

19

Outlet Gates

Valve - 1

Hazard Potential

Low

Foundations

Soil

Nid Height

19
       
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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.