St. Tammany Parish which is approximately 1,124 square miles in size and is located in southeastern Louisiana. The Parish measures approximately 1,124 square miles in size, is situated on the northeast shore of Lake Pontchartrain, and is home to over 258,111 residents. Major communities include:  Slidell, Mandeville, Covington, Abita Springs, Pearl River and Madisonville.

Project Goals:  The goal of the St. Tammany Parish, Louisiana Feasibility Study is to reduce the severity of flood damages and risk to public health and safety, caused by heavy rainfall, riverine flooding, tropical storms and hurricanes.

Problems:  St. Tammany Parish has experienced repeated widespread flooding from rainfall and riverine bank overtopping, waves, and storm surge, including historic impacts during Hurricane Katrina in August of 2005 and recently with the flood of August of 2016. Hurricane Katrina damaged over 48,000 residential structures, causing $1.45 billion in damages. These flood events caused major disruptions, damages, and economic impacts to St. Tammany Parish.