The New Orleans Municipal Yacht Harbor (MYH) is located on the south shore of Lake Pontchartrain, 6 miles north of downtown New Orleans. The harbor was damaged during Hurricane Katrina in 2005, and recent city planning efforts have proposed reconstruction of the harbor interior. Moffatt & Nichol led the design, including the hydrodynamic study which established the marine design criteria. The site is exposed to high surge events which can inundate the harbor’s broad, low-crested earthen breakwater and allow waves to transmit directly into the interior.