Ewing Reservoir Report
Last Updated: December 5, 2025
Ewing is a private dam located in Major County, Oklahoma, near the city of Isabella.
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Summary
Built in 1970, this Earth dam stands at a height of 20 feet and has a storage capacity of 100 acre-feet. The dam's primary purpose is listed as "Other", with a low hazard potential and a very high risk assessment rating. Despite being in a state of "Not Rated" condition assessment, Ewing is regulated, inspected, and enforced by the Oklahoma Water Resources Board.
Situated on TR-Deep Creek, Ewing serves as a vital structure for water resource management in the region. The dam features a controlled spillway and a single valve outlet gate, with a maximum discharge capacity of 100 cubic feet per second. Although the last inspection dates back to 1997, Ewing's emergency action plan status and risk management measures are not fully documented, raising concerns about its preparedness for potential emergencies. As a significant contributor to the local water supply, ongoing monitoring and maintenance of Ewing are crucial to ensure its continued safety and effectiveness.
With its unique design elements and historical significance, Ewing stands as a testament to the importance of proper dam management in the face of changing climate conditions. As climate enthusiasts and water resource advocates continue to push for sustainable solutions, the case of Ewing serves as a reminder of the critical role that infrastructure plays in safeguarding our communities against water-related risks. By staying informed and engaged in the management of structures like Ewing, individuals can help support a more resilient and secure water future for all.
Year Completed |
1970 |
Dam Length |
310 |
Dam Height |
20 |
River Or Stream |
TR-DEEP CR |
Primary Dam Type |
Earth |
Hydraulic Height |
18 |
Nid Storage |
100 |
Structural Height |
20 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
20 |
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.
Ewing