The Narrow River Phragmites Control and Hydrological Restoration was one of forty-one (41) priority habitat restoration projects identified in the 2017 PEP Habitat Restoration Plan by the PEP Habitat Restoration Workgroup. The marshes in the headwaters of Narrow River are dominated by the invasive plant Phragmites australis, including the 113.4-acre Broad Meadows Marsh property (part of New York State’s Long Beach Bay State Tidal Wetlands Preserve) and the Town of Southold’s 16.4-acre Whitcom Marsh Preserve.