G-72 Reservoir Report

Nearby: S-26 S-25b

Last Updated: December 5, 2025

G-72, also known as the C-7 Control Structure, is a crucial water management infrastructure located in Miami-Dade, Florida.


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Summary

Built in 1962 by the USACE, this concrete dam stands at a height of 10 feet and serves various purposes, including flood control and water storage. With a normal storage capacity of 1050 acre-feet and a maximum discharge of 75 cubic feet per second, G-72 plays a vital role in regulating water flow in the C-7 Extension Canal.

Managed by the Florida Department of Environmental Protection (FDEP), G-72 is state-regulated and undergoes regular inspections, permitting, and enforcement to ensure its structural integrity and functionality. With a low hazard potential and a risk assessment rating of "Very High (1)", this dam is classified as a critical infrastructure with high-risk management measures in place. Despite its condition assessment being listed as "Not Rated", G-72 remains a key component in the water resource management of the region.

As a part of the Jacksonville District of the USACE, G-72 is equipped with a controlled spillway and vertical lift outlet gates to efficiently manage water levels and mitigate potential risks. While specific details regarding its last inspection date and emergency action plan preparation are not provided, the structure's strategic location and design highlight its importance in the overall water resource management and climate resilience efforts in the area.

Year Completed

1962

Dam Length

150

Dam Height

10

River Or Stream

C-7 EXTENSION CANAL

Primary Dam Type

Concrete

Surface Area

175

Hydraulic Height

8

Drainage Area

30

Nid Storage

1250

Structural Height

14

Outlet Gates

Vertical Lift

Hazard Potential

Low

Foundations

Rock, Soil

Nid Height

14
       
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.