Snohomish County Flood Insurance Study (FIS)

Purpose

The Flood Insurance Study (FIS):

  • Generates flood risk data for various parts of the county, which is used to establish flood insurance rates and as a basis for the county's floodplain management programs. 
  • Is prepared with analyses that are also used to develop the Flood Insurance Rate Maps (FIRMs), which show flood hazard areas in the county.
  • Provides information to supplement the FIRMs, some of which is compiled in the document Flood Hazard Management Issues in Snohomish County (PDF)

Flood Insurance Study (FIS)