The U.S. Army Corps of Engineers (USACE) New Orleans District started augmenting an underwater sill in the Mississippi River to slow progression of salt water upstream, October 1, 2023. USACE continues to closely monitor, survey and model conditions on the river with regards to potential impacts on both navigation and saltwater intrusion from the Gulf of Mexico. Researchers from the U.S. Army Engineer Research and Development Center are assisting in assessment and mitigation efforts. (U.S. Army Corps of Engineers photo by Ryan Labadens)