A combination of factors has led to a trend of land loss along the Louisiana coast, but mimicking natural flows could help reverse these effects
Historically, the sediment-rich flows from the Mississippi River built coastal Louisiana, and the construction of flood protection levees along the lower Mississippi River has prevented those needed flows from reaching wetlands where they would sustain Louisiana’s coastal landscape. The purpose of the Mid Breton Sediment Diversion project is to reconnect the Mississippi River to deteriorating deltaic wetlands in the Breton Sound Basin.
The current project will reconnect the river through the construction of a control structure in the mainline levee along the Mississippi River. The project also includes an associated river inlet channel, a conveyance channel across the protected landside area, and a back structure through the existing hurricane surge protection levee.
This project is considered key to reversing the coastal land loss trend that has plagued Louisiana for the past hundred years. Upon completion and maturation of the sediment diversion, an estimated 67,500 acres (27,300 hectares) of marsh will be restored, sequestering approximately 24,000 tons of carbon each year.
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