P-7 Reservoir Report

Last Updated: December 5, 2025

P-7, also known as Lake Fannie, is a state-regulated dam located in Polk, Florida.


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Summary

Built in 1965, this concrete dam stands at a height of 15 feet with a hydraulic height of 12.5 feet and a structural height of 18 feet. Its primary purpose is flood risk reduction, providing a storage capacity of 12,495 acre-feet and a maximum discharge of 180 cubic feet per second.

With a hazard potential classified as significant and a high risk assessment rating, P-7 is a crucial structure in managing water resources and mitigating potential flood risks in the area. Despite not having a spillway, this dam plays a vital role in flood risk reduction for the surrounding region. The dam has a normal storage capacity of 12,495 acre-feet and covers a surface area of 833 acres, serving as a key component in the water management infrastructure of the area.

Located in Poualrd Shores, P-7 is under the jurisdiction of the SWFWMD and has been inspected for regulatory compliance. While its condition assessment is currently rated as "Not Rated," the dam's risk management measures and emergency preparedness protocols are essential for ensuring the safety and security of the surrounding community in the event of a water-related emergency. As a state-regulated structure with a high risk assessment, P-7 highlights the importance of proactive water resource management and climate resilience in the face of changing environmental conditions.

Year Completed

1965

Dam Length

24

Dam Height

15

River Or Stream

P7 CANAL

Primary Dam Type

Concrete

Surface Area

833

Hydraulic Height

12.5

Drainage Area

23.7

Nid Storage

12495

Structural Height

18

Hazard Potential

Significant

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.