Bayou Dupont Sediment Delivery-Marsh Creation #3

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Wetlands in the Barataria Basin were historically nourished by the fresh water, sediment and nutrients delivered by the Mississippi River and its many distributary channels. These sediment and nutrient inputs ceased following the creation of levees along the lower river for flood control and navigation. In addition, the construction of numerous oil and gas canals along with subsurface oil and gas withdrawal has exacerbated wetland loss in the area. From 1932 to 1990, the Barataria Basin lost over 245,000 acres of marsh. From 1978 to 1990, the area experiences the highest rate of wetland loss in coastal Louisiana.

The primary goal of this project is to create and nourish approximately 415 acres of emergent intermediate marsh using sediment from the Mississippi River. The proposed project involves dredging sediment from the Mississippi River for marsh creation by pumping the sediment via pipeline into an area of open water and broken marsh. The proximity of the project to the Mississippi River provides a prime opportunity to utilize this renewable river sediment resource. Additionally, tidal creeks will be created to improve marsh habitat value, and native intertidal marsh vegetation will be planted following construction. This project will complement existing restoration projects in the area and could protect existing infrastructure.

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CWPPRA Region 2, Barataria Basin, Jefferson and Plaquemines Parishes. The general project area is about 10 miles south of Belle Chasse, LA and is west of LA HWY 23 and north of the Myrtle Grove Marina. The project is immediately adjacent to the completed CWPPRA Mississippi River Sediment Delivery System- Bayou Dupont (BA-39) project.

This project is on Priority Project List (PPL) 22. This project has started the construction phase.

The Bayou Dupont Sediment Delivery – Marsh Creation #3 project sponsors include:

  • Federal Sponsor: U.S. Environmental Protection Agency
  • Local Sponsor: Coastal Protection and Restoration Authority

Learn more about this project (BA-164) and others on CWPPRA’s project page.

 

 

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