Thompson W.W. Reservoir Report
Last Updated: December 5, 2025
Thompson W.W.
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Summary
is a private-owned dam located in Okmulgee, Oklahoma, specifically in the city of EDNA. Built in 1940, this Earth-type dam stands at a height of 21 feet and has a length of 630 feet, with a storage capacity of 60 acre-feet. The dam is regulated by the Oklahoma Water Resources Board (OWRB) and has state permitting, inspection, and enforcement processes in place.
The primary purpose of Thompson W.W. dam is classified as "Other," and it serves as a crucial structure for managing the flow of TR-BROWNS CREEK. With a low hazard potential and a very high risk assessment rating, this dam is equipped with a controlled spillway and one outlet gate. Despite not being rated for its condition, Thompson W.W. remains a key infrastructure for water resource management in the area, with a maximum discharge capacity of 2430 cubic feet per second.
While Thompson W.W. may not have had recent updates on its emergency action plan or risk management measures, its significance in regulating water flow and providing storage capacity cannot be understated. With its strategic location and design features, this dam plays a vital role in ensuring water resource sustainability and climate resilience in Okmulgee County, Oklahoma.
Year Completed |
1940 |
Dam Length |
630 |
Dam Height |
21 |
River Or Stream |
TR-BROWNS CREEK |
Primary Dam Type |
Earth |
Surface Area |
2 |
Hydraulic Height |
21 |
Nid Storage |
60 |
Structural Height |
21 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
21 |
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.