ONMS MPNMS News Archive News Archive 2023 NOAA announces $5 million to design a new visitor center for Mallows Bay-Potomac River National Marine Sanctuary 2019 Community Celebrates New Mallows Bay-Potomac River National Marine Sanctuary NOAA Designates New Mallows Bay-Potomac River National Marine Sanctuary 2017 Describing the Proposed Mallows Bay-Potomac River National Marine Sanctuary National Marine Sanctuary NOAA Moves to Conserve Shipwrecks in Two New Sanctuaries