Gibsonton (Sw2) Reservoir Report

Last Updated: December 5, 2025

Gibsonton (Sw2) is a private-owned dam located in Hillsborough, Florida, along the Archie Creek.


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Summary

This earth-type dam stands at a towering height of 105 feet and has a storage capacity of 768 acre-feet, with a normal storage level of 538 acre-feet. The dam serves primarily for tailings purposes, making it a crucial structure for water resource management in the area.

With a significant hazard potential and a very high risk assessment rating, Gibbsonton (Sw2) is closely monitored and regulated by the state of Florida. The dam features a controlled spillway type with a width of 64 feet, capable of handling a maximum discharge of 110 cubic feet per second. Despite its impressive structural height of 105 feet and a length of 5333 feet, the dam's condition assessment is currently listed as "Not Rated," highlighting the importance of ongoing inspections and maintenance to ensure its safety and reliability.

As a key component of water resource infrastructure in the region, Gibbsonton (Sw2) plays a vital role in flood control and water storage. Its location within Jackson District and under the jurisdiction of the state underscores the collaborative efforts required to manage and maintain such critical infrastructure. Enthusiasts of water resources and climate resilience will find Gibbsonton (Sw2) to be a fascinating example of engineering ingenuity and the intersection of human activity with natural systems.

Dam Length

5333

Dam Height

100

River Or Stream

ARCHIE CREEK

Primary Dam Type

Earth

Surface Area

38

Hydraulic Height

95

Drainage Area

0.06

Nid Storage

768

Structural Height

105

Hazard Potential

Significant

Nid Height

105
       
Seasonal Comparison

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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.