Existing levees will be raised in two northeast Louisiana parishes starting in the next few weeks.
The levees held during the Mississippi River flood of 2011, but have settled gradually since being built in 1973.
Reynold Minsky is president of the 5th Louisiana Levee District board. He tells The News-Star of Monroe the changes will bring all of East Carroll Parish and most of Concordia Parish to 500-year flood protection levels.
An Army Corps of Engineers report has found debris buried in a levee built after Hurricane Katrina.
The levee protects the densely populated suburban West Bank neighborhoods across the Mississippi River from the main portion of the city.
The report says the levee meets the corps' design specifications and is not in danger of failure because of any unsuitable debris. But the report advises the corps to consider shoring up one portion of the levee built atop a "buried debris field."