The Caernarvon Freshwater Diversion, located south of New Orleans, was built in 1991 at a cost of $25.9 million around the site of the destroyed levee. The diversion was designed and constructed with five 15 feet gates, allowing up to 8000 cfs of river diversion to gravity flow into a conveyance canal. The canal runs to the Big Mar pond but also drains into Bayou Mandeville, Lake Lery, and the Delacroix Canal, which then flows into Oak River, and has created the Caernarvon Delta.