Thompson Mg Reservoir Report
Last Updated: December 5, 2025
Thompson Mg is a privately owned earth dam located in Edna, Oklahoma, along the TR-Browns Creek.
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Summary
Constructed in 1960, this dam stands at a height of 31 feet and has a storage capacity of 120 acre-feet. The dam serves a primary purpose of 'Other' and is regulated by the Oklahoma Water Resources Board (OWRB).
Despite being rated as having a low hazard potential, Thompson Mg is considered to have a very high risk level, with a risk assessment of '1'. The dam features a controlled spillway with a width of 1 foot and is equipped with a single valve outlet gate. While its condition assessment is listed as 'Not Rated', the last inspection was conducted in August 2011 with a frequency of every 5 years.
Thompson Mg poses an interesting case study for water resource and climate enthusiasts, given its unique design and risk profile. With its location in a high-risk area, the dam's management and maintenance practices are crucial to ensure the safety of the surrounding community and the integrity of the structure. Further research and monitoring of Thompson Mg could provide valuable insights into sustainable water resource management in the face of changing climate conditions.
Year Completed |
1960 |
Dam Length |
530 |
Dam Height |
31 |
River Or Stream |
TR-BROWNS CREEK |
Primary Dam Type |
Earth |
Surface Area |
2 |
Hydraulic Height |
31 |
Nid Storage |
120 |
Structural Height |
31 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
31 |
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 Mg