G-92 Reservoir Report

Nearby: S-46 C-18

Last Updated: December 5, 2025

G-92, also known as Martens Culvert, is a state-owned structure located in Jupiter, Florida, along the C-18 Canal.


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Summary

Built in 1953 by the US Army Corps of Engineers, G-92 serves a primary purpose of flood risk reduction in the area. This earth dam stands at a height of 16 feet and has a hydraulic height of 14 feet, with a storage capacity of 1,100 acre-feet and a normal storage capacity of 870 acre-feet.

Despite being classified as having a low hazard potential, G-92 is considered to have a very high risk due to its age and the potential consequences of failure. Although its condition assessment is currently not rated, the structure undergoes regular state inspection, permitting, and enforcement by the Florida Department of Environmental Protection. With a controlled spillway type and vertical lift outlet gates, G-92 plays a crucial role in managing water levels and protecting the surrounding Palm Beach County area from flooding.

As a vital component of the water resource infrastructure, G-92 serves as a key asset in mitigating flood risks and ensuring the safety of the local community. Its strategic location and design make it a critical structure for managing water flow along the C-18 Canal, highlighting the importance of ongoing monitoring and maintenance to uphold its functionality and resilience in the face of evolving climate conditions.

Year Completed

1953

Dam Length

60

Dam Height

16

River Or Stream

C-18 CANAL

Primary Dam Type

Earth

Surface Area

145

Hydraulic Height

14

Drainage Area

30

Nid Storage

1100

Structural Height

22

Outlet Gates

Vertical Lift

Hazard Potential

Low

Foundations

Soil

Nid Height

22
       
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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.