Coburn Reservoir Report
Last Updated: December 6, 2025
Coburn is a privately owned Earth dam located in Muskogee, Oklahoma, with a primary purpose classified as "Other".
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Summary
The dam was completed in 1940 and stands at a height of 15 feet, with a hydraulic height of 10 feet. It has a storage capacity of 50 acre-feet and a normal storage of 33 acre-feet. The dam spans a length of 500 feet and has a surface area of 8 acres.
The dam is regulated by the Oklahoma Water Resources Board (OWRB) and is subject to state permitting, inspection, and enforcement. It is situated on the TR-ARKANSAS RIV river or stream, within the Tulsa District of Oklahoma. Despite being categorized as a low hazard potential structure with a "Not Rated" condition assessment, the dam's risk assessment is classified as "Very High (1)". Emergency preparedness measures, such as an Emergency Action Plan (EAP), have not been implemented or updated for Coburn.
Overall, Coburn presents an interesting case for water resource and climate enthusiasts, as it showcases the importance of regulatory oversight and risk management for dams. With its historical significance dating back to 1940 and its location within the Muskogee, Oklahoma area, this privately owned dam serves as a reminder of the need for proper maintenance and emergency preparedness in safeguarding water resources and communities against potential risks and hazards.
Year Completed |
1940 |
Dam Length |
500 |
Dam Height |
15 |
River Or Stream |
TR-ARKANSAS RIV |
Primary Dam Type |
Earth |
Surface Area |
8 |
Hydraulic Height |
10 |
Nid Storage |
50 |
Structural Height |
15 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
15 |
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.
Coburn