Projects: Marsh Restoration

Marsh restoration projects rehabilitate existing marsh or build marsh in shallow open waters areas. This project type can improve the quality of marsh habitat and build new marsh habitat. Marsh creation can be used in combination with sediment diversions to help trap sediment. In turn, sediment diversions can benefit marsh creation projects by providing a long-term source of sediment that can help lengthen their lifespans.

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New Orleans East Landbridge Restoration

  • State: Louisiana
  • Type: Marsh Restoration
  • Basin: Pontchartrain-Maurepas Basin

This marsh creation project is located in eastern New Orleans on the narrow landbridge that separates Lake Pontchartrain from Lake Borgne. Salinities have increased in this area due to local subsidence and canals and along with waves, have resulted in the rapid retreat of the shoreline and expansion of ponds and lakes within the marsh. This project will create and restore this marsh land-bridge using sediment, restoring significant fish and wildlife habitat and a crucial line of defense from storm surge for 1.5 million people in the parishes surrounding Lake Pontchartrain.

Fish and Waterfowl Benefits

This project is a critical landscape feature that includes the Bayou Sauvage National Wildlife Refuge, the largest urban refuge in the nation. The refuge provides opportunities for sportsmen to fish and crab and for youth to hunt waterfowl. The landbridge also helps buffer storm surge for the nearby Big Branch National Wildlife Refugewhere people crab, hunt deer, small game and waterfowl, and fish in the marshes, bayous and in Lake Pontchartrain for speckled trout, bass, redfish and other popular species.  

Project Status: 
Conceptual > Feasibility & Planning > Engineering & Design > Under Construction > Completed


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Dantzler Coastal Preserve Restoration

  • State: Mississippi
  • Type: Marsh Restoration
  • Estuary: Mississippi Sound
  • Land Benefit: 900 acres

This project will restore a total of 900 acres (500 acres of estuarine marsh and 400 acres of longleaf pine savannah) within Dantzler Coastal Preserve, which is part of the state’s larger Pascagoula River Marsh Preserve. The Dantzler property suffered less direct wind and tidal surge damage than many of the other Coastal Preserves during Hurricane Katrina. However, serious long-term consequences are anticipated due to the distribution of Chinese tallow tree propagules across the site. The effort to regain control of Chinese tallow throughout the site and cleanup residual storm debris would be greatly aided by first conducting comprehensive prescribed burns. Restoring access that was lost due to storm downfall can be accomplished as part of the preparation for prescribed burning. There would be prescribed fires, 400 acres of invasive species control via spraying and cutting, 75 acres of reforestation and monitoring.

Fish and Waterfowl Benefits

The Pascagoula River Marsh Preserve consists of 11,500 acres that includes essentially all marsh associated with the mouth of the Pascagoula River. Tidal marsh serves as a nursery for recreationally and commercially important fisheries, filters water from rivers before the reach the Gulf, and function as buffers from coastal storms. Boaters and anglers also use the Pascagoula River Marsh area on occasional and seasonal basis for waterfowl hunting (sparingly) and fishing.

Project Status: 
Conceptual > Feasibility & Planning > Engineering & Design > Under Construction > Completed


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Large-Scale Barataria Marsh Creation

  • State: Louisiana
  • Type: Marsh Restoration
  • Basin: Barataria Basin
  • Land Benefit: 8,618 acres

This marsh creation project is in Mid-Barataria Basin in the vicinity of the town of Lafitte. Historically, there was a limited connection between the fresher upper basin and the saltier lower basin. Canal networks, erosion and subsidence have eaten holes through the natural barriers, exposing wetlands in the upper basin to saltwater intrusion and waves. A critical landscape feature, this project will continue to build on marsh creation projects that have been constructed or are under construction to strengthen the Barataria Landbridge. Sediment conveyed from the river through a pipeline will be used to build new marsh, nourish existing marsh in the area, help restore historic low salinities in the upper basin and help protect the nearby community of Lafitte from storm surge and tidal flooding.

Fish and Waterfowl Benefits

Restoration and renourishment of the Barataria Land-Bridge will help protect the 30,000 acre Salvador/Timken Wildlife Management Area and Jean Lafitte National Historic Park and Preserve, located in the upper part of the Barataria Basin, from the devastating effects of saltwater intrusion and damage from storms. Both of these areas provide freshwater habitat to waterfowl, deer, bass, catfish and other species and recreational opportunities to sportsman.

Project Status: 
Conceptual > Feasibility & Planning > Engineering & Design > Under Construction > Completed

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