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Restoration Center | CWPPRA


Atchafalaya Sediment Delivery Project

The delta marshes at the mouth of the Atchafalya River are one of the few places in coastal Louisiana where marsh areas are naturally accreting as opposed to being lost. This project was designed in conjunction with the Big Island Mining project to enhance the east-west sub-delta development of the lower Atchafalaya River into Atchafalaya Bay in St. Mary Parish, Louisiana. Located in the eastern lobe area, this part of the project included re-opening both Natal Channel and Castille Pass, which had silted in over the years. Over 10,000 linear feet, or 700,925 cubic yards, of material were dredged and utilized at the site to create 278 acres of marshlands. An additional 2,200 acres of wetlands are expected to accrete over the 20 year monitoring life of this project. The construction phase of this project was completed in March 1998.


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September 30, 2009