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Saltwater intrusion in Mississippi River threatens livelihood of residents south of New Orleans

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Plaquemines Parish , Louisiana 's southernmost parish, has been hit by saltwater intrusion three summers in a row.

The salt is corroding the parish's water supply pipes, causing them to rust and burst underground.

Drought, sea level rise, severe storms and dredging are partly to blame for the increase in frequency and swatch of saltwater.

Louisiana Lt. Governor Billy Nungesser says the city's water and infrastructure must be protected with a more permanent solution.

He says a better option is to strengthen the Mississippi River's flow by filling crevasses along the river's edge that have widened over the years .

The Corps is investing $20 million on a five-year study that has three years to go to analyze the entire Mississippi River from top to bottom.