Copan Dam - Caney Levee Reservoir Report

Last Updated: December 13, 2025

Copan Dam - Caney Levee, located in Dewey, Oklahoma, along the Little Caney River, is a gravity dam primarily built for flood risk reduction.


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Summary

Completed in 1983 by the US Army Corps of Engineers, this structure stands at a height of 73 feet and has a storage capacity of 338,000 acre-feet. With a controlled spillway width of 495 feet, the dam plays a crucial role in managing water flow in the region.

Despite being classified as having a high hazard potential, the risk associated with the Caney Levee is actively managed by the USACE through various measures. Emergency action plans are regularly updated, and detailed inspections - including video inspections of conduits running through the levee - are conducted to ensure structural integrity. Furthermore, modifications to the pump station have been implemented to enhance system reliability, showcasing the dedication to risk mitigation and public safety.

The risk management efforts for Caney Levee are comprehensive, involving regular maintenance activities, emergency exercises for evacuation planning, and close coordination with local authorities. USACE's commitment to ongoing risk assessment and proactive measures highlights the importance placed on safeguarding the town of Caney, Kansas, against potential flooding events.

Year Completed

1983

Dam Length

7730

Dam Height

73

River Or Stream

LITTLE CANEY

Primary Dam Type

Gravity

Surface Area

4850

Hydraulic Height

67

Drainage Area

505

Nid Storage

338000

Structural Height

73

Hazard Potential

High

Nid Height

73
       
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.