National Marine Sanctuary: Mallows Bay – Potomac River
Mallows Bay – Potomac River is a 14 square mile area of the tidal Potomac River adjacent to Charles County. It was nominated as a national marine sanctuary through the Sanctuary Nomination Process with broad community support.
The area encompasses historic shipwrecks of national significance that merit the additional management authority of the National Marine Sanctuaries Act. Nearly 200 known vessels span from the Revolutionary War through the present, and include the remains of the largest “Ghost Fleet” of World War I wooden steamships built for the U.S. Emergency Fleet, which are listed on the National Register of Historic Places.
Mallows Bay is a largely undeveloped landscape and waterscape identified as one of the most ecologically valuable in Maryland, as the ship remains provide important habitat for fish and wildlife, including rare, threatened and endangered species.