faulty design and inadequate construction of the levees said www.washingtonpost.com WaPo article WASHINGTON POST poorly designed levee system Katrina's storm surge in New Orleans was actually far less Katrina's storm surge in New Orleans was actually far less Faulty levies, not Overtopping Engineers did with Hurricane Katrina said told poorly designed levee system structural reported told Experts Say Faulty Levees Caused Much of Flooding article Washington Post Experts Say Faulty Levees Caused Much of Flooding