Hil20 Reservoir Report

Last Updated: December 5, 2025

Hil20 is a privately owned earth dam located in Plant City, Florida, with a primary purpose of storing tailings.


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Summary

The dam stands at a height of 7.65 feet and has a storage capacity of 2,736.8 acre-feet. Situated on an unnamed pond in Hillsborough County, the dam is regulated by the Florida Department of Environmental Protection (FDEP) and is subject to state permitting, inspection, and enforcement.

Although the condition assessment of Hil20 is not rated and its hazard potential is undetermined, it is crucial for water resource and climate enthusiasts to monitor and assess the safety and maintenance of the dam. With its proximity to residential areas and its significant storage capacity, any potential risks or failures could have a substantial impact on the surrounding environment and communities. The presence of associated structures and the lack of a designated emergency action plan (EAP) underscore the importance of ongoing monitoring and risk assessment for this dam.

Given the critical role of dams in water resource management and climate resilience, stakeholders should advocate for the development of a comprehensive EAP, regular inspection and maintenance schedules, and risk management measures for Hil20. Collaborative efforts between the private owner, regulatory agencies, and the local community are essential to ensure the safety and integrity of this dam and to mitigate any potential risks to the environment and public safety.

Dam Length

8719

Dam Height

7.65

River Or Stream

UNNAMED POND

Primary Dam Type

Earth

Surface Area

94

Nid Storage

2736.8

Hazard Potential

Undetermined

Nid Height

8
       
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.