FEMA released preliminary Digital Flood Insurance Rate Maps (DFIRM) for all of Plaquemines Parish on October 30, 2008. Recently, FEMA has partnered with the U.S. Army Corps of Engineer (USACE) to determine the flood risk in and around the Hurricane and Storm Damage Risk Reduction System (HSDRRS) in order to update the portion of the 2008 preliminary DFIRMs in the vicinity of the levee system.
On November 9, 2012, FEMA released revised preliminary DFIRMs for Plaquemines Parish. The flood risk depicted on the revised preliminary DFIRM maps incorporate the HSDRRS improvements completed by the USACE and constructed local drainage system improvements that assist in the conveyance of flood water within your community. The updated flood risk information provided through the preliminary DFIRMs will provide the communities, residents and business owners within Plaquemines Parish more precise information about the flood risk they face, allowing them to make more informed decisions to reduce their personal risk to life and property.
Communities within Plaquemines Parish can review areas prone to flooding during the 1-percent-annual-chance storm event by reviewing the preliminary DFIRMs. The flood hazard areas depict the areas prone to coastal storm surge, river flooding, and rainfall events and illustrate the complex network of canals, levees, pumping stations and closure structure in operation during an event of that magnitude. With the complex nature of the systems within Plaquemines Parish, residents and business owners should look to the DFIRM maps to understand the possibility of flooding within their vicinity.
For additional information on the progress of the Greater New Orleans flood hazard update review the Region 6 project page at: http://www.fema.gov/fema-region-vi-updating-flood-maps-greater-new-orleans-area