Structure 83 Reservoir Report

Last Updated: December 5, 2025

Located in Highlands County, Florida, Structure 83 is a state-regulated earth dam designed for flood risk reduction and irrigation purposes along the Canal C-41A.


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Summary

With a structural height of 13 feet and a hydraulic height of 8 feet, this dam has a storage capacity of 1300 acre-feet and covers a surface area of 150 acres. Despite its significant hazard potential, the condition assessment in 2014 deemed it to be in satisfactory condition.

Owned and operated by the state of Florida, Structure 83 is regularly inspected, permitted, and enforced to ensure its proper functioning and safety. The dam is situated in the city of Brighton and falls under the jurisdiction of the Jacksonville District of the US Army Corps of Engineers. With its primary purpose of flood risk reduction, it plays a crucial role in managing water resources and minimizing the impact of potential flooding events in the region.

Although no modifications or inspections have been reported since 2014, Structure 83 remains a vital infrastructure for water resource management in the area. With its strategic location and purposeful design, this earth dam stands as a testament to the state's commitment to safeguarding its water resources and mitigating the effects of climate change on the local community.

Dam Height

11

River Or Stream

CANAL C-41A

Primary Dam Type

Earth

Surface Area

150

Hydraulic Height

8

Nid Storage

1300

Structural Height

13

Hazard Potential

Significant

Nid Height

13
       
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.