Terrebonne Ridge Restoration: Mauvais Bois

Terrebonne Ridge Restoration: Mauvais Bois

11.15.2017 | By Terrebonne Ridge Restoration: Mauvais Bois

This project will restore the historic Mauvais Bois and Bayou DuLarge Ridges located in Terrebonne Parish near Lake Mechant and Caillou Lake. The project will restore and construct maritime forest in the lower Terrebonne marshes by using dredged sediment to increase the elevation of the relict ridges. Both ridges will help restore historic hydrologic patterns and reduce saltwater intrusion. They will also buffer storm surge and wind energy for inland communities. Two diversions, Atchafalaya River Diversion and Increase Atchafalaya Flow …

Isles Dernieres Restoration

11.15.2017 | By Isles Dernieres Restoration

This project will restore the Isles Dernieres barrier islands located on the western end of the Terrebonne Basin barrier shoreline. Storm-induced breaching and erosion, sediment starvation, sea level rise, tidal increases caused by interior land loss, subsidence and canal-induced hydrological changes have reduced the size of these islands. This loss directly impacts the fish and wildlife of the region and leaves the marshes and infrastructure in the interior of Terrebonne Bay vulnerable to saltwater intrusion, higher wave energies and storm …

Houma Navigation Canal Lock Hydrologic Restoration

11.15.2017 | By Houma Navigation Canal Lock Hydrologic Restoration

This project will construct a lock on the Houma Navigation Canal located in western Terrebonne Bay. The Houma Navigation Canal is a significant conduit for salt water into Terrebonne’s rapidly disappearing marshes. Construction of this project would help control salinities in the navigation canal and increase the effectiveness of the Increase Atchafalaya Flow into Terrebonne Marshes project by retaining and enhancing the distribution of fresh water in the wetlands to the north of the lock.

Increase Atchafalaya Flow into Terrebonne Marshes

11.15.2017 | By Increase Atchafalaya Flow into Terrebonne Marshes

This hydrologic diversion project stretches from the Atchafalaya River to the Houma Navigation Canal, which is part of the Gulf Intracoastal Waterway system. The marshes in the influence area are nearly an equal distance from the Mississippi and Atchafalaya rivers and are blocked from significant amounts of river water and sediment. These marshes have been rapidly converted to open water because of saltwater intrusion and sediment starvation. This project would dredge and deepen a portion of the Gulf Intracoastal Waterway …

Atchafalaya River Sediment Diversion

11.15.2017 | By Atchafalaya River Sediment Diversion

To be constructed off the Atchafalaya River, the Atchafalaya River Sediment Diversion will provide basin-wide benefits to marshes in southwest Terrebonne Parish. Sediment and fresh water diverted into the marshes will help build land and sustain other nearby projects planned for construction, like Mauvais Bois Ridge Restoration. This project will have the greatest benefits to freshwater habitats, such as forested areas, flotant and fresh and intermediate marsh, which are threatened by saltwater intrusion and sediment starvation.

Timbalier Islands Restoration

11.15.2017 | By Timbalier Islands Restoration

This project will restore the Timbalier Islands located on the eastern end of the Terrebonne Basin barrier shoreline. Sediment starvation, sea level rise, tidal increases and storm events have driven migration of the islands to the northwest and severely reduced their length and width. This has diminished important barrier island habitat in the area and increased the vulnerability of interior Terrebonne Bay marshes to high-energy waves and storm surge. This project will restore dune and beach habitat as well as …