Oknoname 30206 Reservoir Report

Last Updated: December 6, 2025

Oknoname 30206, located in Atoka, Oklahoma along the Potubbi Creek, is a privately owned earth dam designed by USDA NRCS with a height of 16.6 feet and a storage capacity of 77.13 acre-feet.


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Summary

The dam serves a primary purpose of "Other" and is regulated by the Oklahoma Water Resources Board. With a low hazard potential and a risk assessment rating of "Very High (1)", this structure is inspected every 5 years, with the last inspection conducted in April 2010.

The dam features a controlled spillway, valve outlet gates, and a stone core foundation on soil. Despite not having a condition assessment rating, it is considered to be in good condition. The surrounding area has a drainage area of 0.4 square miles and a normal storage capacity of 6.47 acre-feet. The dam plays a crucial role in water resource management and flood control in the region, contributing to the overall resilience of the local ecosystem in Darwin, Oklahoma.

With its strategic location and important role in water management, Oknoname 30206 highlights the importance of sustainable infrastructure for climate resilience. As climate change continues to impact water resources, structures like Oknoname 30206 are vital for mitigating risks and ensuring the safety of communities. Collaboration between private owners, regulatory agencies, and designers like USDA NRCS is essential for maintaining and improving the functionality of such critical infrastructure in the face of a changing climate.

Dam Length

800

Dam Height

16.6

River Or Stream

POTUBBI CREEK

Primary Dam Type

Earth

Surface Area

2.79

Hydraulic Height

19.6

Drainage Area

0.4

Nid Storage

77.13

Structural Height

9.1

Outlet Gates

Valve - 1

Hazard Potential

Low

Foundations

Soil

Nid Height

20
       
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.