Durant Lake Reservoir Report

Last Updated: December 5, 2025

Durant Lake, located in Bryan County, Oklahoma, is a local government-owned water supply reservoir completed in 1994 on the Little Blue River.


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Summary

The dam, primarily made of earth and stone, stands at 45 feet high and has a structural height of 64 feet, with a storage capacity of 7,194 acre-feet and a surface area of 307 acres. With a primary purpose of water supply, the lake plays a crucial role in meeting the water needs of the surrounding community.

Managed by the Oklahoma Water Resources Board, Durant Lake is equipped with a valve outlet gate and an uncontrolled spillway. The dam has a high hazard potential but has been assessed as satisfactory, with regular inspections conducted to ensure its safety and functionality. Despite the moderate risk associated with the reservoir, measures are in place to manage potential emergencies effectively. As a significant water resource in the region, Durant Lake serves as a vital infrastructure for water supply and contributes to the overall water management efforts in Bryan County, Oklahoma.

Year Completed

1994

Dam Length

3450

Dam Height

45

River Or Stream

LITTLE BLUE RIVER

Primary Dam Type

Earth

Surface Area

307

Hydraulic Height

45

Drainage Area

17.3

Nid Storage

7194

Structural Height

64

Outlet Gates

Valve - 1

Hazard Potential

High

Foundations

Soil

Nid Height

64
       
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.