Usaf Dam (Weekly Pond) Reservoir Report

Last Updated: December 5, 2025

Usaf Dam, also known as Weekly Pond or Plew Lake, is a Federal-owned structure located in Okaloosa County, Florida, on the Eglin Air Force Base.


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Summary

Managed by the US Air Force, this earth dam was completed in 1969 and serves multiple purposes, including recreation and water supply. With a height of 18 feet and a length of 340 feet, the dam holds a storage capacity of 120 acre-feet and covers an 8-acre surface area.

Despite its low hazard potential, Usaf Dam has undergone modifications in the year 2000 to enhance its foundation, hydraulic, and structural integrity. The dam features an uncontrolled spillway with a width of 16 feet and a maximum discharge of 10 cubic feet per second. While the condition assessment is currently not available, the dam is inspected annually, with the last inspection conducted in September 2019. With a moderate risk rating, appropriate risk management measures are in place to ensure the safety and stability of the structure.

Enthusiasts of water resources and climate will find Usaf Dam to be an intriguing site, not only for its engineering aspects but also for its recreational opportunities and contribution to the local water supply. The dam's location on Mill Creek, its association with the US Air Force, and the surrounding natural landscape make it a compelling destination for those interested in the intersection of water management, infrastructure, and environmental conservation.

Years Modified

2000 - Foundation, 2000 - Hydraulic, 2000 - Structural

Year Completed

1969

Dam Length

340

Dam Height

18

River Or Stream

MILL CREEK

Primary Dam Type

Earth

Surface Area

8

Hydraulic Height

10

Drainage Area

1.7

Nid Storage

120

Structural Height

15

Outlet Gates

Uncontrolled, Valve

Hazard Potential

Low

Foundations

Soil

Nid Height

18
       
Seasonal Comparison

Weather Forecast

Dam Data Reference

Condition Assessment

Satisfactory
No 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

High
Dams 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.