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 Floodplains
 Section TopicsEnvironmental and Cultural Resources HomeNEPA Current NEPA DocumentsCultural ResourcesWildlife and Fisheries Section 7Water Resources Coastal IssuesFloodplainsWetlandsPhysical ResourcesEnvironmental JusticeEnvironmental Library Environmental Archives
 Prior to approving a project or program, FSA must consider whether that project or program will cause adverse effects to areas known as floodplains. Specifically, those areas referred to as 100-year floodplains must be evaluated. An area is determined to be a 100-year floodplain if it has a one percent chance of being flooded within a 100-year period. Some of the actions that may cause adverse effects to a floodplain include building construction, drainage, dams, and irrigation diversion structures.  Floodplains - Related Links **National Flood Insurance Program - FEMA** http://www.fema.gov/business/nfip/index.shtm **FEMA Map Service Center**
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