Middle Fork Obion #11 Reservoir Report
Nearby: Spring Creek Trib Thompson Creek #2
Last Updated: December 14, 2025
Middle Fork Obion #11, also known as Middle Fork Obion Dam 11, is a local government-owned structure located in Gleason, Tennessee.
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Summary
Built in 1974 by the USDA NRCS, this earth dam stands at a structural height of 27 feet and serves the primary purpose of flood risk reduction along the Arnold Branch river or stream. With a maximum storage capacity of 656 acre-feet and a normal storage of 65 acre-feet, this dam covers a surface area of 18.5 acres and has a drainage area of 1.35 square miles.
Managed by the Tennessee Safe Dams Program, Middle Fork Obion #11 has a low hazard potential and is considered to be in satisfactory condition as of the last inspection in November 2019. The dam features an uncontrolled spillway type and does not have outlet gates. Despite its moderate risk assessment, the structure has not undergone any modifications in recent years, indicating its reliability in mitigating flood risks in the region. As part of the Nashville District, this dam plays a crucial role in safeguarding the local community from potential flooding events.
With its solid stone core and soil foundation, Middle Fork Obion #11 stands as a testament to effective flood risk reduction efforts in Weakley County, Tennessee. The dam, designed by the Natural Resources Conservation Service, exemplifies the collaboration between local governments and federal agencies in ensuring the safety and resilience of water resources in the region. As water resource and climate enthusiasts, it is important to recognize the critical role that structures like Middle Fork Obion #11 play in protecting communities and ecosystems from the impacts of extreme weather events.
Year Completed |
1974 |
Dam Length |
685 |
River Or Stream |
ARNOLD BRANCH |
Primary Dam Type |
Earth |
Surface Area |
18.5 |
Hydraulic Height |
12.7 |
Drainage Area |
1.35 |
Nid Storage |
656 |
Structural Height |
27 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
27 |
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.
Middle Fork Obion #11