C-18 Reservoir Report
Nearby: G-92 Corbett Levee
Last Updated: December 5, 2025
Located in Palm Beach, Florida, the C-18 dam, also known as the C18 Weir, was completed in 1952 with the primary purpose of flood risk reduction along the Loxahatchee Slough.
°F
°F
mph
Wind
%
Humidity
Summary
This state-regulated structure stands at 20 feet in height and has a hydraulic height of 9 feet, providing storage capacity of 220 acre-feet and serving a drainage area of 150 acres. The dam, constructed with roller-compacted concrete, spans 100 feet in length and covers a surface area of 22 acres.
Despite its low hazard potential and a lack of recent condition assessment, the C-18 dam remains maintained and inspected by the Florida Department of Environmental Protection (FDEP) with state jurisdiction, permitting, inspection, and enforcement in place. The structure is designed to handle a maximum discharge of 1000 cfs and features a spillway width of 100 feet. Although the last inspection date is outdated, with the structure not yet rated for condition assessment, the dam continues to serve its flood risk reduction purpose effectively in the region, under state regulatory oversight.
With Congressman Brian J. Mast representing the area, the C-18 dam remains a vital infrastructure component in managing flood risks along the Loxahatchee Slough in Palm Beach, Florida. As water resource and climate enthusiasts, the data on this dam provides insight into its design, purpose, and operational parameters, highlighting the importance of maintaining and monitoring such structures for effective flood control and water resource management in the region.
Year Completed |
1952 |
Dam Length |
100 |
Dam Height |
10 |
River Or Stream |
LOXAHATCHEE SLOUGH |
Primary Dam Type |
Other |
Surface Area |
22 |
Hydraulic Height |
9 |
Drainage Area |
150 |
Nid Storage |
220 |
Structural Height |
20 |
Hazard Potential |
Low |
Foundations |
Rock, Soil |
Nid Height |
20 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Dam Data Reference
Condition Assessment
SatisfactoryNo 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
HighDams 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.
Area Campgrounds
| Location | Reservations | Toilets |
|---|---|---|
River Camp
|
||
Kitching Creek Primitive Camp
|
||
Eaglesview Equestrian Camp
|
||
Youth Camp
|
C-18
PGA Boulevard Palm Beach Gardens
John C. and Mariana Jones/Hungryland Wildlife and Environmental Area
Loxahatchee River Battlefield Park
Cypress Creek Natural Area
Jonathan Dickinson State Park
North Jupiter Flatwoods Natural Area