North Fork Forked Deer River Dam No. 4 Reservoir Report
Last Updated: December 15, 2025
North Fork Forked Deer River Dam No.
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Summary
4, located in Gibson, Tennessee, is a local government-owned structure designed by USDA NRCS. Completed in 1990, this earth dam stands at a height of 23.5 feet and serves the primary purpose of flood risk reduction along the North Fork of the Forked River. With a maximum storage capacity of 43.2 acre-feet and a normal storage of 8 acre-feet, this dam plays a crucial role in mitigating the impact of potential flooding events in the area.
Managed by the Natural Resources Conservation Service, North Fork Forked Deer River Dam No. 4 has a low hazard potential and is currently rated as "Not Rated" in terms of its condition assessment. The dam features an uncontrolled spillway type with a width of 30 feet and a maximum discharge capacity of 430 cubic feet per second. Despite not being inspected since January 2020, the structure is considered to have a moderate risk level (3) and is subject to an inspection frequency of every 3 years.
In the event of an emergency, the dam has emergency action plans in place, though details on their preparation and compliance with guidelines are not specified. With its strategic location and importance in flood risk reduction efforts, North Fork Forked Deer River Dam No. 4 stands as a critical infrastructure ensuring the safety and well-being of the surrounding community and water resources enthusiasts alike.
Year Completed |
1990 |
Dam Length |
386 |
Dam Height |
23.5 |
River Or Stream |
TR- FORKED RIVER N FORK |
Primary Dam Type |
Earth |
Surface Area |
2 |
Hydraulic Height |
23 |
Drainage Area |
0.16 |
Nid Storage |
43.2 |
Structural Height |
25 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
25 |
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.
North Fork Forked Deer River Dam No. 4