Mariners are advised that a contractor will be collecting samples of the Delaware River floor 500 feet north and south of the Delaware Memorial Bridge, spanning shoreline to shoreline, from 7:30 AM to 5 PM. on August 28, September 3, and September 4, 2026. The 20-foot vessel will be marked with "AECOM" Signage and have equipment in the water taking videos and collecting samples. The vessel will be monitoring AIS and VHF Channel 16. Mariners are requested to use caution when transiting the area.