London Avenue Canal Floodwall Breach. On August 29, 2005, tidal surge from Hurricane Katrina exposed design flaws in the London Avenue Canal floodwall, part of the Federal Flood Protection System. The floodwater killed many Gentilly residents and their beloved pets. The breach was one of 50 in the System that occurred that day. In 2008, the US District Court, Eastern District of Louisiana, placed responsibility for this floodwall's collapse squarely on the US Army Corps of Engineers; however, the agency is protected from financial liability in the Flood Control Act of 1928