Mississippi River Navigation Sustainment Act

[AI summary unavailable — showing source text] Mississippi River Navigation Sustainment Act - Directs the Chief of Engineers to carry out a study of the Mississippi River Basin to: (1) improve the coordinated and comprehensive management of water resource projects in the greater Mississippi River Basin relating to extreme weather conditions, and (2) evaluate the feasibility of modifications to those projects and develop new projects to improve the reliability of navigation and more effectively reduce flood risk. Directs the Chief to improve forecasting on the Mississippi River by: (1) updating forecasting technology deployed on the River and its tributaries, (2) constructing additional sedimentation ranges on the River and tributaries, and (3) deploying additional automatic identification system base stations at river gage sites. Requires the Chief to prioritize the sections of the River on which additional and more reliable information would have the greatest impact on maintaining navigation. Authorizes the Chief to: (1) construct, operate, and maintain ingress and egress paths to docks, loading facilities, fleeting areas, and other critical locations outside of the authorized navigation channel on the Mississippi River upon d…