The Mississippi River Hydrodynamic and Delta Management (MRHDM) Study is the first large-scale, long-term restoration assessment investigated under the LCA Program, as authorized under Section 7003 of the Water Resource Development Act (WRDA) 2007. This study will identify and evaluate a combination of large-scale management and restoration features to address the long-term sustainability of the lower Mississippi River Deltaic Plain, and will balance the interests of ecosystem restoration, flood risk reduction and navigation.