AUTHORITY: The project was originally authorized by Section 201 of the Flood Control Act of 1965. The Water Resources Development Act (WRDA) of 1996 provides additional authorization.

Phase I - Consists of a vegetated dune extending along the length of Grand Isle's gulf shore, a jetty to stabilize the western part of the island, and 23 segmented offshore breakwaters protecting the eastern end of the island. Another modification to the project, as authorized by the WRDA of 1996, provides for construction of additional breakwaters, road raising and a levee system.

Phase II – Consists of a small levee along the bayside of Grand Isle and completely around the populated area of Cheniere Caminada, raising the roads in these areas, and constructing of segmented breakwaters at numerous locations along the bayside of Grand Isle.

Phase I - The project was completed on 1 Oct 91 and turned over to the local sponsors, the State of Louisiana Department of Transportation and Development and the Town of Grand Isle.

Phase II - The WRDA of 1996 provided the authority to construct additional flood protection along the bayside of Grand Isle, pending completion of a report finding that such work is technically sound, environmentally and economically acceptable.

The preliminary analysis of the economic viability of this project shows this project is not economically justified.

WRDA of 1999, Section 410, states: "In carrying out a study of the storm damage reduction benefits to Grand Isle and Vicinity, Louisiana, the Secretary shall include benefits that a storm damage reduction project for Grand Isle and Vicinity, Louisiana may have on the mainland coast of Louisiana as project benefits attributable to the Grand Isle project." Federal and State agencies agree, in principal, that shoreline protection/restoration, breakwaters, and reforestation provides environmental and recreational benefits.