Oknoname 113017 Reservoir Report

Last Updated: December 15, 2025

Oknoname 113017, a privately owned dam located in Osage County, Oklahoma, serves the primary purpose of flood risk reduction along the Mission Creek.


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Summary

Constructed in 1957, this earth dam stands at a height of 20 feet with a length of 200 feet, providing a storage capacity of 50 acre-feet. The dam features a controlled spillway and a single valve outlet gate for water release.

Despite its low hazard potential, Oknoname 113017 is rated as having a very high risk due to its structural condition not being assessed. The dam is regulated and inspected by the Oklahoma Water Resources Board, ensuring compliance with state regulations and enforcement measures. Although last inspected in 2006, the dam is scheduled for regular inspections every 5 years to ensure its continued safety and functionality.

The location of Oknoname 113017 in HERD, Osage County, makes it a crucial infrastructure for flood management in the region. With its historical significance dating back to the mid-20th century, this dam plays a vital role in protecting the surrounding area from potential flooding events, highlighting the importance of proper maintenance and ongoing risk assessment for water resource and climate enthusiasts.

Year Completed

1957

Dam Length

200

Dam Height

20

River Or Stream

MISSION CR

Primary Dam Type

Earth

Surface Area

1

Hydraulic Height

20

Nid Storage

50

Structural Height

20

Outlet Gates

Valve - 1

Hazard Potential

Low

Foundations

Soil

Nid Height

20
       
Seasonal Comparison

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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.