Brackish water creeping up the Mississippi River may threaten Louisiana's drinking supply

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Brackish water creeping up the Mississippi River may threaten Louisiana's drinking supply
EnvironmentU.S. News
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For the third year in a row, Louisiana is constructing an underwater levee in the Mississippi River to slow an influx of salt water from the Gulf of Mexico.

Woman named in AMBER Alert arrested for child custody interference, Kerr County officials sayDeftones inks San Antonio stop on upcoming ‘2025 North American Tour’FILE - In this aerial photo a tugboat pushing barges navigates around sandbars amid low water levels on the Mississippi River in Livingston Parish, La., Sept. 14, 2023. – An influx of salt water in the Mississippi River, which feeds southeastern Louisiana's drinking water supplies, is once again creeping up the waterway.

On Monday, the corps of engineers began building a sill across the river bed in Myrtle Grove, about 30 miles south of New Orleans. The sill is meant to slow or halt salt water, which flows along the bottom of the river because it's more dense than fresh water. Building the sill with river sand is estimated to be completed by October.

Salt water intrusion in Louisiana is not unique to this year. Last year in parts of Plaquemines Parish, the southeast corner of Louisiana that encompasses the final stretch of the Mississippi River before it empties into the Gulf of Mexico, residents were forced toThe salt water issue stretched further than residents had seen before in 2023. As it neared New Orleans, Louisiana's most populous city, President Joe Bidenand issued federal disaster assistance to the state.

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