Soil dredged from Mississippi River may be used to rebuild marsh

Amid plans to close a controversial freshwater diversion that appeared to be building new land at West Bay, near the mouth of the Mississippi River, the Army Corps of Engineers is proposing to use sediment dredged from the river to do much the same thing. The proposed West Bay Placement Area — part of a national “beneficial use” dredging program — would target 17,781 acres of shallow open water and eroding marsh on the western side of the river in lower Plaquemines Parish, adjacent to the diversion. The diversion has been ordered closed by a federal-state task force because its operation was conditioned on the dredging of nearby anchorages, and that has become expensive. Corps officials are designing a rock dike that will close the 200-yard-wide, 90-foot-deep gap in the river levee that allows water and sediment to flow through West Bay. However, they don’t know yet when it will be built.

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http://www.nola.com/environment/index.ssf/2012/06/

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