As the Mississippi River plunges, the Army Corps is building a 1,500-foot-wide levee to keep salt water out of drinking water… The US Army Corps of Engineers has launched construction on a 1,500-foot-wide underwater levee in the Mississippi River to prevent saltwater from pushing up the river amid record-low river levels and flow rates. While … Continue reading The water level in the Mississippi River is so low that the Army Corps is building a 1,500-foot-wide levee to keep salt water out of drinking water