Usac N4n Reservoir Report
Nearby: N-4 Rockland Mine Es-Tech Sa-8
Last Updated: December 5, 2025
Usac N4n, also known as N8 Usac, is a private water resource located in Fort Meade, Florida, specifically on McCullough Creek.
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Summary
This dam, completed in 1985, serves primarily for tailings purposes and is categorized as an Earth dam made with Stone core and Soil foundation. It stands at a height of 15 feet with a hydraulic height of 10 feet and a structural height of 17 feet, stretching over a length of 5275 feet and storing a maximum of 2200 acre-feet of water.
Managed by the Jacksonville District of the US Army Corps of Engineers, Usac N4n has a low hazard potential and is not currently rated for its condition. Despite its low hazard potential, the risk assessment rates it as very high, underscoring the importance of regular inspections and maintenance. The dam features a controlled spillway with a width of 5 feet, capable of discharging a maximum of 3 cubic feet per second. Although the last inspection was conducted in January 2006, the dam has not been given a condition assessment date, highlighting the need for ongoing monitoring and risk management measures to ensure its safety and integrity in the face of potential climate challenges.
Year Completed |
1985 |
Dam Length |
5275 |
Dam Height |
15 |
River Or Stream |
MCCULLOUGH CREEK |
Primary Dam Type |
Earth |
Surface Area |
198 |
Hydraulic Height |
10 |
Drainage Area |
0.31 |
Nid Storage |
2200 |
Structural Height |
17 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
17 |
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.
Usac N4n