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Louisiana Commences Unprecedented Coastal Habitat Restoration Project

The state just broke ground on the Mid-Barataria Sediment Diversion—America’s largest and most expensive habitat restoration project to date.

The state just broke ground on the Mid-Barataria Sediment Diversion—America’s largest and most expensive habitat restoration project to date—to breathe life back into a critical Gulf Shore basin and promote long-term fishery health.

The first time I launched a boat out of Empire, La., along the Mississippi River south of New Orleans, I had just graduated from high school in 1994.

I had spent a lot of time, to that point, fishing across Louisiana’s coast, from Delacroix, east of New Orleans, to Dularge in western Terrebonne Parish, but I never had the opportunity to traverse the speckled trout and redfish paradise of the eastern Barataria Basin with its seemingly endless maze of bayous, marsh ponds, lakes, and bays between our launching spot and the Gulf of Mexico.

About a decade later, those bayous, lakes, and bays were either gone or almost totally unrecognizable, laid to waste by Hurricane Katrina’s unprecedented storm surge and land-eating ferocity. Other powerful hurricanes like Gustav, Ike, Laura, Delta, and especially 2021’s Ida, which washed away more than 100 square miles of coastal wetlands, have gouged and gashed the Barataria Basin in the 18 years since Katrina. These, along with nature’s consistent, relentless attacks and effects of the 2010 Deepwater Horizon oil spill, have further altered the basin.

What was once eight miles of marsh between Empire and the Gulf is now open water dotted with pilings and concrete riprap where old fishing camps and natural gas canals used to be. The Barataria Basin was 700 square miles of varying coastal marshes, swamps, bays, and islands from the west bank of the river to Bayou Lafourche in 1900. More than 430 square miles of that have vanished in the last century.

On August 10, the Louisiana Coastal Protection and Restoration Authority, federal partners, and hundreds of Louisianans gathered just north of Empire to break ground on the Mid-Barataria Sediment Diversion, a project designed to breathe life back into the Barataria Basin by reconnecting the Mississippi River to the marshes, bayous, islands, and ponds it originally built.

It is America’s largest, most ambitious, and most expensive habitat restoration project to date, designed to move as much as 75,000 cubic feet of sediment-laden water per second through a gate on the Mississippi River levee and a two-mile conveyance channel to mimic the connection that once existed between the river and its delta. The price tag is estimated at an astonishing $2.9 billion, almost all covered by penalties levied against BP and others for damages caused by the 2010 oil disaster including $660 million for construction from the National Fish and Wildlife Foundation’s Gulf Environmental Benefit Fund. Optimistically, the project is set for completion by 2028.   

Thousands of years of annual floods and consistent connections between the river and the basin immediately to its west built what was once one of the world’s most productive fishery and waterfowl wintering grounds. But since that connection was cut off, beginning initially in the late 19th century to straight-line the river’s channel for ease of navigation and with levees built to control flooding, Barataria has been sinking and eroding faster than any other coastal basin in the world.

Wetland scientists, engineers, and fish and wildlife biologists have been predicting the basin’s eventual demise since the late 1800s because of efforts to disconnect the river from dozens of outlets south and west of New Orleans. Even back then, with a seemingly inexhaustible expanse of wetlands and barrier islands still present, there was an appreciation that removing the land-building sediment and the life-giving water and nutrients meant eventually the coastal habitat would vanish, taking away the fisheries and wildlife production and natural protection for coastal communities. However, the prediction was that the region and nation would both benefit so greatly from consistent navigation and flood control it would undoubtedly re-invest in the ecosystem at some point.

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