Mulberry (12) Reservoir Report

Last Updated: December 5, 2025

Mulberry (12) is a private dam located in Polk, Florida, specifically in the city of Mulberry.


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Summary

It is situated along the North Prong Alafia River and falls under the jurisdiction of the state of Florida. With a height of 100 feet and a hydraulic height of 95 feet, this earth dam serves primarily for tailings purposes and has a storage capacity of 512 acre-feet.

The dam has a significant hazard potential and is classified as having a very high risk level. Despite not being rated in terms of condition assessment, it is subject to state regulation, permitting, inspection, and enforcement. With a controlled spillway and a width of 64 feet, Mulberry (12) has a maximum discharge capacity of 110 cubic feet per second, serving a drainage area of 25.6 square miles. The dam's structural height is 105 feet, with a length of 4488 feet and a surface area of 26 acres.

For water resource and climate enthusiasts, Mulberry (12) presents an intriguing case study of a privately owned dam in Florida with a complex risk profile. Its location along the North Prong Alafia River and its role in tailings management highlight the intersection of water management, environmental protection, and infrastructure development. With its high hazard potential and very high risk assessment, the dam underscores the importance of proactive monitoring and maintenance to ensure the safety and sustainability of water resources in the region.

Dam Length

4488

Dam Height

100

River Or Stream

NORTH PRONG ALAFIA RIVER

Primary Dam Type

Earth

Surface Area

26

Hydraulic Height

95

Drainage Area

25.6

Nid Storage

512

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.