W.P. Franklin Lock And Dam Reservoir Report

Last Updated: December 5, 2025

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Summary

Franklin Lock and Dam, located on the Caloosahatchee River in Lee, Florida, is a Federal-owned structure managed by the US Army Corps of Engineers. Completed in 1965, this multi-arch dam stands at a structural height of 31 feet and serves multiple purposes including flood risk reduction, irrigation, navigation, and recreation. With a controlled spillway width of 340 feet and a maximum discharge capacity of 28,900 cubic feet per second, the dam plays a crucial role in managing water levels and mitigating flood risks in the area.

Despite its low hazard potential, the dam is subject to regular inspections and risk assessments to ensure its structural integrity and operational readiness. The USACE actively manages flood risks associated with the dam by monitoring its condition, prioritizing maintenance activities, and collaborating with local emergency managers to develop emergency action plans and evacuation strategies. As part of their risk management efforts, the USACE also engages with the public to raise awareness about the dam and promote preparedness in the event of a dam-related emergency.

Year Completed

1965

Dam Length

1700

River Or Stream

CALOOSAHATCHEE RIVER (C-43)

Surface Area

800

Length Of Locks

400

Hydraulic Height

25

Drainage Area

839

Nid Storage

32266

Structural Height

31

Hazard Potential

Low

Foundations

Soil

Nid Height

31
       
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.