Optima Dam Reservoir Report

Last Updated: December 5, 2025

Optima Dam, also known as Optima Lake, is a Federal-owned structure located in Beaver, Oklahoma.


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Summary

Completed in 1978 by the US Army Corps of Engineers (USACE), the earth-type dam stands at a height of 120 feet and has a maximum storage capacity of 618,500 acre-feet. With a primary purpose of flood risk reduction, the dam also serves other functions such as recreation and water supply for the region.

The dam's risk assessment categorizes it as having a moderate risk level, with the USACE implementing various risk management measures to ensure the safety and integrity of the structure. These measures include continuous monitoring of the dam's condition, prioritizing activities to mitigate risks, and collaborating with local emergency managers to develop emergency action plans and evacuation procedures. Despite its high hazard potential, the USACE's proactive approach and regular maintenance efforts aim to mitigate potential risks associated with the dam.

In the event of severe weather or increased water inflow, the dam may release water to manage levels upstream or downstream and maintain its structural integrity. The USACE's diligent risk management practices and emergency preparedness efforts showcase their commitment to safeguarding the community and surrounding areas from potential dam-related emergencies.

Year Completed

1978

Dam Length

16875

Dam Height

120

River Or Stream

NORTH CANADIAN RIVER

Primary Dam Type

Earth

Surface Area

5340

Hydraulic Height

113

Drainage Area

2341

Nid Storage

618500

Structural Height

120

Outlet Gates

Vertical Lift - 0

Hazard Potential

High

Foundations

Rock, Soil

Nid Height

120
       
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.