Gully Dam Reservoir Report

Last Updated: December 5, 2025

Gully Dam, located in Leon, Florida, is a privately owned structure primarily used for recreation.


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Summary

Completed in 1970, this earth dam stands at 18 feet high and spans 600 feet in length, with a storage capacity of 65 acre-feet. Despite its low hazard potential, the dam has a moderate risk assessment rating of 3 due to its uncontrolled spillway and outlet gates.

Situated on the TR-OCHLOCKNEE river, Gully Dam serves purposes of irrigation and recreation, attracting water resource and climate enthusiasts to its scenic surroundings. While the dam has not been inspected since May 1994 and is currently in a condition that is not rated, it remains under state regulation with permitting, inspection, and enforcement protocols in place. The dam's location in Lake Iamonia offers a tranquil environment for outdoor activities, making it a popular destination for locals and visitors alike.

Although Gully Dam has not been modified in recent years and lacks certain emergency preparedness measures like an inundation map and emergency action plan, its risk management measures are being monitored to mitigate potential hazards. With its historical significance and ongoing relevance for water resource management and recreational use, Gully Dam continues to be a notable landmark in Leon, Florida, attracting individuals interested in the intersection of water resources and climate dynamics.

Year Completed

1970

Dam Length

600

Dam Height

18

River Or Stream

TR-OCHOCKNEE

Primary Dam Type

Earth

Surface Area

4

Hydraulic Height

18

Nid Storage

65

Structural Height

13

Outlet Gates

Uncontrolled

Hazard Potential

Low

Nid Height

18
       
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.