Atchafalaya River Sediment Diversion

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.

Manchac Landbridge Diversion

11.15.2017 | By Manchac Landbridge Diversion

Manchac Landbridge Diversion will be constructed within the existing western guide levee of the Bonnet Carre Spillway. Currently, when the Bonnet Carre Spillway is opened to reduce river flood risk in New Orleans, all of the sediment, fresh water and nutrients are directed into Lake Pontchartrain, wasting these vital resources and causing water quality issues. The Manchac Diversion will direct some of these flows into degraded swamps and marshes adjacent to the spillway to increase nutrient input and improve water …

Ama Diversion

11.15.2017 | By Ama Diversion

Located in St. Charles Parish, the $882-million Ama Sediment Diversion will divert sediment, nutrients and freshwater from the Mississippi River to existing wetlands in the upper Barataria Basin and will also likely benefit marsh creation projects further down in the basin. With a maximum capacity of 50,000 cubic feet of water per second, the project will build and sustain wetland forests, fresh and intermediate marshes by increasing sediment input, water flow and nutrients in the basin. It will be designed …

Mid-Barataria Sediment Diversion

10.17.2016 | By Mid-Barataria Sediment Diversion

This sediment diversion is located along the west bank of the Mississippi River near Myrtle Grove. The brackish and freshwater wetlands in the influence area are highly degraded due to a combination of saltwater intrusion, decreased fresh water supply, alterations to the natural hydrology of the area and a lack of sediment input. This project will reconnect the river to the influence area and divert sediment, nutrients and fresh water to build new land, maintain existing marshes and increase habitat …

Lower Breton Sediment Diversion

10.17.2016 | By Lower Breton Sediment Diversion

This sediment diversion project is planned for lower Breton Sound along the east bank of the Mississippi River, likely across from Port Sulphur. Below the reach of the federal, man-made levees on the east bank, the brackish and salt marshes in the influence area have low rates of loss relative to many other parts of the coast. These low rates of land loss may be attributed to the sediment and fresh water these marshes periodically receive when the river overtops …

Mid-Breton Sediment Diversion

10.17.2016 | By Mid-Breton Sediment Diversion

To be located along the east bank of the Mississippi River near Wills Point and upriver of the White Ditch siphon, this sediment diversion will convey fresh water and sediment into deteriorating marshes that drain into middle Breton-Chandeleur Basin. The swamps and marshes in the influence area have disappeared due to a combination of changes in the supply and distribution of fresh water, subsidence, saltwater intrusion, sediment starvation and storm events. This project will reconnect the influence area with the …