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Atchafalaya Sediment Delivery Project
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NOAA Restoration Center
Coastal Wetlands Planning
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Atchafalaya Sediment Delivery Project
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.
Atchafalaya Sediment Delivery Project
Atchafalaya Sediment Delivery Project
Restoration
Bulltongue and Alligator weed colonizing water areas surrounding the marshcreation sites.
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The edge of one of the marsh creation sites one year after construction.
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Hydraulic dredge in Castille Pass, looking to the west.
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Building a containment dike.
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Dredged sediments being pumped through a pipeline toward the marsh creationdisposal area.
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The bucket dredge at Natal Channel.
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Marsh Creation disposal site immediately after construction.
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