Cope Et Reservoir Report
Nearby: Mcgaha Jesse Delling Grady
Last Updated: December 16, 2025
Cope Et, located in Chisney, Oklahoma, is a privately owned earth dam constructed in 1979 by the USDA NRCS.
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Summary
This dam, with a height of 29 feet and a length of 470 feet, serves multiple purposes including flood control on the TR-Little Riv and has a storage capacity of 70 acre-feet. Managed by the OWRB, Cope Et is regulated, permitted, inspected, and enforced to ensure its safety and functionality.
Despite being classified as low hazard potential with a very high risk assessment, Cope Et has not been rated for its condition. It has one valve outlet gate and a controlled spillway with a width of 1 foot. The dam undergoes inspections every 5 years, with the last one conducted in May 2011. While the emergency action plan status and risk management measures are not specified, the dam's risk assessment score indicates a need for heightened vigilance and monitoring by authorities and stakeholders in the region.
As a crucial water resource structure in Pottawatomie County, Cope Et plays a significant role in managing water flow and storage in the area. With its stone core and soil foundation, this dam stands as a testament to collaborative efforts between private owners, federal agencies, and state regulators to ensure the safety and sustainability of water resources in Oklahoma. Climate enthusiasts and water resource professionals alike can appreciate the intricate design and regulatory framework that governs Cope Et for the benefit of the local community and environment.
Year Completed |
1979 |
Dam Length |
470 |
Dam Height |
29 |
River Or Stream |
TR-LITTLE RIV |
Primary Dam Type |
Earth |
Hydraulic Height |
29 |
Nid Storage |
70 |
Structural Height |
29 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
29 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Dam Data Reference
Condition Assessment
SatisfactoryNo 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
HighDams 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.
Cope Et