Chapter 5: NFIP Design of Floodplain Encroachments & Cross Drainage Structures


Section 1: The National Flood Insurance Program (NFIP)

The roadway and drainage facility designers, whether TxDOT or consultant, need to consider flood issues, and be familiar with the intent and requirements of the Federal Emergency Management Agency (FEMA) NFIP.

The NFIP was established by the United States Congress in the National Flood Insurance Act of 1968 (42 U.S.C. 4001 et seq.) and is administered by the Federal Insurance Administration and the Mitigation Directorate of FEMA. Flooding may be from marine, lacustrine, or riverine sources.

The purpose and intent of the NFIP is to discourage development within the floodplain that will increase the risk of loss from flood damage, and to encourage suitable use of floodplains. Parks, playfields, roads, bridges, and culverts are consistent with suitable use of floodplains when properly designed and constructed.

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