Flooding at the Bonnet Carré Spillway

Mississippi River water flows through the Bonnet Carré Spillway into the channel, where it will flow to Lake Pontchartrain.

In late 2015/early 2016, unusually large rainfall in the Upper Mississippi River Valley led to flooding throughout Arkansas, Illinois, Louisiana, Mississippi, Missouri, and Tennessee. USGS water science centers responded to the flooding by measuring the streamflow, collecting water quality information, and providing that information to emergency responders.