What is your criteria for establishing a flood plain?
Flood hazard areas are determined by FEMA using statistical analyses of records of riverflow, storm tides, and rainfall; information obtained through consultation with the community; floodplain topographic surveys; and hydrologic and hydraulic analyses. The District has posted PDF copies of the East Ojai Valley Alluvial Fan Flood Plain Topographic GIS Map and Graphics displayed at the Public Outreach Meeting on our Levee Certification Public Safety Project Website (i.e. www.vcwatershed.org/levee/) to help explain these alluvial fan flood plain mapping issues. Generally, FEMA uses Flood Insurance Studies (FIS) as its preferred technical vehicle to cover areas subject to flooding from rivers and streams, (including alluvial fan flood plains along elevated mountsides) as well as along coastal areas and lake shores, or shallow flooding areas. FEMA’s Ventura River Flood Insurance Study (FIS), which also includes an updated evaluation of the alluvial fan floodplain in East Oaji, is currently underway. FEMA projects a December 2009 completion date for the Ventura River FIS. At year’s end, it would be advisable to visit FEMA’s website www/FloodSmart.gov to check on the status of the Ventura FIS.