The Maurepas Swamp in Louisiana, west of New Orleans, covers 176 square miles (456 square kilometers) and ranks among the largest forested wetlands in the United States. Recognized for its biodiversity, it is home to bald eagles, alligators, and migratory birds. Over time, levees along the Mississippi River have blocked the swamp’s natural water flow, depriving it of essential nutrients. This disruption has caused significant ecological decline, harming water tupelo and bald cypress trees. To address this issue, the River Reintroduction into Maurepas Swamp project was initiated with a $330 million budget. The project aims to restore 45,000 acres (182 square kilometers) of wetlands by reintroducing river water through a 5.5-mile (9-kilometer) channel. Completion is planned for 2028.

The project focuses on providing sediment, oxygen, and nutrients needed to combat subsidence caused by fossil fuel extraction and rising sea levels. Funded by Deepwater Horizon oil spill settlements, it also involves collaboration with the U.S. Army Corps of Engineers. Benefits include enhanced biodiversity, such as improved habitats for yellow-throated warblers, and wetlands acting as storm barriers, offering innovative disaster mitigation in hurricane-prone regions.