Thompson W.W. Reservoir Report
Last Updated: December 5, 2025
Thompson W.W.
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Summary
is a private dam located in Edna, Oklahoma, along the TR-BROWNS CREEK. Built in 1940, this Earth-type dam stands at a height of 20 feet and has a length of 460 feet, with a storage capacity of 50 acre-feet. It is regulated by the Oklahoma Water Resources Board and has state jurisdiction for permitting, inspection, and enforcement.
Despite being classified as having a low hazard potential, Thompson W.W. is considered to have a very high risk due to its condition assessment being marked as "Not Rated." The dam has one valve outlet gate and a controlled spillway type with a width of 1 foot. Although it has not been modified in recent years, the last inspection was conducted in 2011 with an inspection frequency of 5 years.
Thompson W.W. poses a significant risk in terms of water resource management and climate resilience, highlighting the importance of regular maintenance and assessment to ensure its safety and functionality. With its location in a high-risk area and the potential for increased discharge during extreme weather events, monitoring and risk management measures are crucial to protect surrounding communities and water resources in the event of an emergency.
Year Completed |
1940 |
Dam Length |
460 |
Dam Height |
20 |
River Or Stream |
TR-BROWNS CREEK |
Primary Dam Type |
Earth |
Surface Area |
2 |
Hydraulic Height |
20 |
Nid Storage |
50 |
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.
Thompson W.W.