In floodplain management, freeboard refers to an additional height above the Base Flood Elevation (BFE) that serves as a safety margin to account for uncertainties in flood predictions. Implementing a freeboard of plus 2 feet means elevating structures two feet above the established BFE, enhancing protection against potential flooding.
Understanding Freeboard
Freeboard is a safety factor, typically expressed in feet above the BFE, used in floodplain management to address unknown factors that could contribute to higher flood levels than those calculated. These factors include wave action, bridge openings, and the hydrological effects of urbanization. While not mandated by the National Flood Insurance Program (NFIP), incorporating freeboard is encouraged to enhance community resilience.
Benefits of a 2-Foot Freeboard
- Enhanced Flood Protection Elevating structures an additional two feet above the BFE provides a buffer against unforeseen flood events, offering greater protection to properties.
- Reduced Insurance Premiums Implementing a 2-foot freeboard can lead to substantial savings on flood insurance premiums. For example, in certain flood zones, adding 2 feet of freeboard has been shown to save homeowners significant amounts over the life of a 30-year mortgage.
- Increased Property Resilience Structures built with additional freeboard are better equipped to withstand flood events, reducing potential damage and associated repair costs.
Community Implementation of Freeboard Standards
Communities are recognizing the importance of freeboard in mitigating flood risks. For instance, the Planning, Zoning, and Building Department of Longboat Key proposed an ordinance allowing for an additional 2 feet of freeboard, reflecting a proactive approach to floodplain management.
Conclusion
Incorporating a 2-foot freeboard into building practices is a prudent measure that enhances safety, reduces financial burdens from potential flood damage, and contributes to overall community resilience. Property owners and communities alike benefit from this added layer of protection against the unpredictable nature of flooding events.
Frequently Asked Questions
- What is freeboard in floodplain management?
Freeboard is an additional height above the Base Flood Elevation used as a safety factor to account for uncertainties in flood predictions. - Why is a 2-foot freeboard recommended?
A 2-foot freeboard provides extra protection against unforeseen flood events and can lead to significant savings on flood insurance premiums. - Is freeboard a mandatory requirement?
While not required by the National Flood Insurance Program, many communities adopt freeboard standards to enhance flood resilience. - How does freeboard affect flood insurance rates?
Elevating a structure above the BFE with additional freeboard can result in lower flood insurance premiums due to the reduced risk of flood damage. - Are there any downsides to adding a 2-foot freeboard?
The primary consideration is the initial construction cost increase; however, this is often offset by long-term savings in insurance premiums and reduced flood damage risk.
