Oknoname 30048 Reservoir Report

Last Updated: December 6, 2025

Oknoname 30048, located in Custer County, Oklahoma, is a local government-owned earth dam designed by USDA NRCS with a primary purpose listed as "Other." Completed in 2001, this dam stands at a height of 22.4 feet and has a storage capacity of 69.9 acre-feet.


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Summary

The dam, situated on the Washita River, serves as a vital infrastructure for water resource management in the area, with a normal storage capacity of 15.4 acre-feet and a drainage area of 525 square miles.

Despite being classified as having a low hazard potential, Oknoname 30048 is rated as having a very high risk, highlighting the importance of regular inspections and maintenance. The dam features a controlled spillway and a single valve outlet gate for water release. The dam's risk management measures and emergency action plans are not currently rated or up to date, emphasizing the need for ongoing monitoring and preparedness in the face of potential climate-related challenges.

With Congressman Frank D. Lucas representing the district, Oknoname 30048 is under the jurisdiction of the Oklahoma Water Resources Board and is subject to state regulation, inspection, and enforcement. The dam plays a crucial role in water storage and flood control along the Washita River, showcasing the intersection of water resource management, climate resilience, and infrastructure development in the region.

Year Completed

2001

Dam Length

420

Dam Height

22.4

River Or Stream

WASHITA RIVER

Primary Dam Type

Earth

Surface Area

3.5

Hydraulic Height

19.6

Drainage Area

525

Nid Storage

69.9

Structural Height

25

Outlet Gates

Valve - 1

Hazard Potential

Low

Foundations

Soil

Nid Height

25
       
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.