Heavy winter precipitation in the midwest brought rising waters to the Mississippi River in late February, 2018. Last opened just two years ago, the Bonnet Carre Spillway, located in the southwestern corner of Lake Pontchartrain, was opened on March 8th, to relieve pressure on the levees. Engineers sought to keep the river stage at New Orleans below 17 feet, and have opened about half of the 350 bays. These images catalog the macro-scale movement of this sediment-laden water.