Hiwassee Reservoir Report
Nearby: Logsdon Felix D Arcadia Dam
Last Updated: December 16, 2025
Hiwassee is a privately owned dam located in Luther, Oklahoma, along the TR-Deep Fork River.
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Summary
Completed in 1950, this Earth dam stands at a height of 44 feet and spans 1550 feet in length, providing a surface area of 132 acres for recreational activities. With a normal storage capacity of 2400 acre-feet and a maximum discharge of 7000 cubic feet per second, Hiwassee is primarily used for recreation purposes and is regulated by the Oklahoma Water Resources Board.
Despite being classified as a low hazard potential structure with a satisfactory condition assessment, Hiwassee poses a very high risk due to its location and potential impact on downstream areas. The dam is equipped with a controlled spillway and a valve outlet gate for water management. Regular inspections are conducted every 5 years to ensure the safety and integrity of the structure.
Managed by the Tulsa District of the US Army Corps of Engineers, Hiwassee is a key water resource for the community, offering not only recreational opportunities but also serving as a vital component of the local watershed. Enthusiasts of water resources and climate will find Hiwassee to be a fascinating case study of sustainable dam management in Oklahoma.
Year Completed |
1950 |
Dam Length |
1550 |
Dam Height |
44 |
River Or Stream |
TR-DEEP FORK RIV |
Primary Dam Type |
Earth |
Surface Area |
132 |
Hydraulic Height |
44 |
Nid Storage |
3100 |
Structural Height |
44 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
44 |
Seasonal Comparison
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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.
Hiwassee