Bayou Bonfouca Marsh Creation

DDG was hired by CPRA as a sub-consultant to Providence Engineering’s IDIQ to perform the construction administration on the Bayou Bonfouca Marsh Creation Project near Slidell, LA. The project goal was to create 600 acres and nourish over 200 acres of low salinity brackish marsh in open water areas adjacent to Bayou Bonfouca with sediment pumped from Lake Pontchartrain. This project consisted of placing sediment, hydraulically dredged from Lake Pontchartrain, in open water sites to a height of +1.2 NAVD 88. Several historic marsh ponds have been identified and would be restored. Tidal creeks were also designed to connect these ponds to facilitate water exchange and access to fisheries. In addition, shoreline protection was provided using articulated concrete block mats for a portion of the containment dike exposed to open water. Containment dikes will be sufficiently gapped or degraded to allow for fisheries access no later than three (3) years post construction.

DDG was responsible for construction administration duties which include review of shop drawings and submittals, preparation of field changes, change orders, review of invoices (including Davis Bacon Act responsibilities) construction progress meetings, and final inspections.

Project Details

Location
St. Tammany Parish, LA
Client
Coastal Protection & Restoration Authority
Services
Coastal Engineering
Scale
591 Acres Created/Restored
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