Leonard-Werner Reservoir Report

Last Updated: December 6, 2025

Leonard-Werner is a privately owned earth dam located in Hughes, Oklahoma, along the TR.


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Summary

LITTLE RIVER. Built in 1978 by the USDA NRCS, it stands at 28 feet high with a maximum storage capacity of 350 acre-feet, primarily serving the purpose of flood risk reduction. The dam's controlled spillway type and valve outlet gate ensure efficient water management, with a low hazard potential and a very high risk assessment rating.

Managed by the Oklahoma Water Resources Board, Leonard-Werner is inspected every 5 years to ensure its structural integrity and adherence to state regulations. With a designer name of Natural Resources Conservation Service, the dam's stone core and soil foundation contribute to its stability and functionality. Located in the city of BILBY, the dam plays a crucial role in protecting the surrounding area from flooding, with a historical maximum discharge of 1092 cubic feet per second.

Climate and water resource enthusiasts will appreciate Leonard-Werner as a key infrastructure contributing to flood risk reduction in Oklahoma. Its design and construction by USDA NRCS, along with ongoing state regulation and inspection, showcase a commitment to water management and safety. This dam serves as a vital component of the Tulsa District's flood control system, highlighting the importance of proactive measures in mitigating natural disaster risks and safeguarding communities.

Year Completed

1978

Dam Length

500

Dam Height

28

River Or Stream

TR.LITTLE RIVER

Primary Dam Type

Earth

Hydraulic Height

25

Nid Storage

350

Structural Height

28

Outlet Gates

Valve - 1

Hazard Potential

Low

Foundations

Soil

Nid Height

28
       
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.