Mulberry (5) Reservoir Report

Last Updated: December 5, 2025

Mulberry (5) is a privately owned dam located in Polk, Florida, along the North Prong Alafia River.


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Summary

This significant dam has a height of 100 feet and a hydraulic height of 95 feet, with a structural height of 105 feet. It serves primarily for tailings purposes and has a storage capacity of 896 acre-feet, with a normal storage capacity of 627 acre-feet.

The dam features a controlled spillway with a width of 64 feet and a maximum discharge capacity of 110 cubic feet per second. With a hazard potential rated as significant and a risk assessment indicating a very high risk level, Mulberry (5) is a critical structure that requires regular inspection, as well as emergency action planning and risk management measures. Despite being labeled as not rated in terms of condition assessment, the dam's risk level underscores the importance of maintaining its structural integrity to protect both the surrounding environment and downstream communities from potential harm.

Given its location in a region susceptible to climate variability and extreme weather events, Mulberry (5) serves as a vital component in water resource management for the area. With its strategic position along the river and its crucial role in regulating water flow and storage, this dam embodies the intersection of water resource management and climate resilience, making it a focal point for enthusiasts interested in understanding the intricate relationship between infrastructure, water resources, and climate dynamics in Florida's landscape.

Dam Length

6125

Dam Height

100

River Or Stream

NORTH PRONG ALAFIA RIVER

Primary Dam Type

Earth

Surface Area

45

Hydraulic Height

95

Drainage Area

0.07

Nid Storage

896

Structural Height

105

Hazard Potential

Significant

Nid Height

105
       
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.