New Orleans: Inner Harbor Navigation Canal

Hurricane & Storm Damage Risk Reduction System (HSDSSR)

Posted on 5 May 2014


In August 2005, Hurricane Katrina caused extensive damage to the levees, floodwalls and other hurricane-protection works in the vicinity of the Inner Harbor Navigational Canal (IHNC), Gulf Intracoastal Waterway and Mississippi River-Gulf Outlet system. To restore the level of protection and provide the additional protection authorized by Congress after Hurricane Katrina, the U.S. Army Corps of Engineers is completing the construction of the Hurricane and Storm Damage Risk Reduction System (HSDRRS).

ARCADIS worked as part of a joint venture on components of the HSDRRS, to reduce risk to areas of New Orleans and surrounding parishes from future storm events.


  • The IHNC Lake Borgne Surge Barrer, a 1.8-mile-long structure that is the largest barrier of its kind in the world and is designed to prevent storm surge from Lake Borgne from rushing into the Inner Harbor Navigation Canal and the Gulf Intracoastal Waterway.
  • The Seabrook Floodgate Complex, adjacent to New Orleans Lakefront Airport, on the shore of Lake Pontchartrain, which was designed to stop storm surge from coming south off the lake and also to work together with the Inner Harbor Navigation Canal–Lake Borgne Surge Barrier.


  • 23-miles of levees and floodwall in St. Bernard's Parish, together with a closure gate system.


Project location

Project partners

  • Arcadis Nederland B.V.