Slidell is a city situated on the northeast shore of Lake Pontchartrain in St. Tammany Parish, Louisiana, United States. It is part of the New OrleansMetairieKenner Metropolitan Statistical Area. Around 1910, Slidell began a period of economic and industrial growth. A large creosote plant was built, and Slidell became home to the Fritz Salmen Brickyard, a major producer of bricks later named St. Joe Brick. A lumber mill and shipyard were also built. Following the construction of Interstate 10, Interstate 59, and Interstate 12, Slidell became a major crossroads for those traversing the Gulf States.