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The purpose of this page is to define anchoring, a commonly used term in floodplain management.


If a proposed building site is in a flood-prone area, all new construction and substantial improvements shall be designed (or modified) and adequately anchored to prevent flotation, collapse, or lateral movement of the structure resulting from hydrodynamic and hydrostatic loads, including the effects of buoyancy. There are specific requirements for manufactured homes and structures in V Zones.

National Flood Insurance Program (NFIP) Requirement

Other Applicable NFIP Regulations


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Last Updated: 
04/26/2015 - 13:05