The Mississippi River bed from the mouth by the Gulf, all the way to Natchez, MS sits lower than the Gulf of Mexico. Salt water is more dense or heavier than fresh water.

Mississippi River levels are so low that saltwater from the Gulf of Mexico is threatening drinking water in Louisiana. NPR's Michel Martin speaks with Ricky Boyett of the U.S. Army Corps of Engineers.

According to Boyett, the river needs at least 300,000 cubic feet per second of water flowing down it to keep out the salt from the Gulf of Mexico; right now, he says, there’s only about half of ...

Typically, the mighty flow of the Mississippi River — which stretches from northern Minnesota, through the center of the continental United States and out to the Gulf of Mexico — is enough to ...

DUBUQUE, Iowa (KCRG) - The National Mississippi River Museum & Aquarium in Dubuque says it has reopened its Gulf of Mexico exhibit. It comes after a propylene glycol leak in the HVAC system in ...

Minnesotan-led canoe team sets unofficial speed record on Mississippi River In the middle of the night, crew reaches mouth of Gulf of Mexico after nearly 17 days and about 2,300 miles. By Bob Timmons ...

The U.S. Army Corps of Engineering will build an underwater sill across the bed of the Mississippi River to prevent the flow of salt water from the Gulf of Mexico into the river.