The majority of highway crossings involve floodplains that are in FEMA-participating communities. It is important to acknowledge FEMA floodplains in the planning phases of a project and accommodate them in design. Early coordination with the community's NFIP administrator is essential to identify and avert potential problems. See Chapter 5,

Federal Emergency Management Agency (FEMA) National Flood Insurance Program (NFIP) Compliant Design of Floodplain Encroachments and Minor Structures

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