Gypsum Field Dike Reservoir Report

Last Updated: December 5, 2025

The Gypsum Field Dike in Hillsborough, Florida is a privately owned earthen structure completed in 1974 for the primary purpose of storing tailings.


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Summary

Standing at a height of 100 feet with a structural height of 72 feet, this dike spans a length of 12,050 feet and has a storage capacity of 200 acre-feet. Situated near an unnamed pond, this low-hazard dam plays a crucial role in managing water resources in the region.

Managed by the Jacksonville District of the US Army Corps of Engineers, the Gypsum Field Dike is regulated by the state of Florida and undergoes regular inspections to ensure its structural integrity and compliance with safety guidelines. Despite being classified as low hazard, the dam has not been formally rated for its condition assessment. While it has not experienced any modifications over the years, its emergency action plan and risk management measures are not currently documented.

Enthusiasts of water resources and climate in the region can appreciate the significance of the Gypsum Field Dike as a key infrastructure for water storage and management in Hillsborough County. With its strategic location and purposeful design, this earthen dam serves as a vital component of the local water resource system, contributing to the overall resilience and sustainability of the surrounding ecosystem.

Year Completed

1974

Dam Length

12050

Dam Height

100

River Or Stream

UNNAMED POND

Primary Dam Type

Earth

Surface Area

28

Hydraulic Height

100

Nid Storage

200

Structural Height

72

Hazard Potential

Low

Nid Height

100
       
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.