Boater Safety

Navigating Around the New NY Bridge Construction Zone

Mariners are strongly advised to adhere to the following guidelines established by the U.S. Coast Guard:


  • Closures of the main channel may occur due to on-going operations. Tune to Marine Radio Channel 22A for the latest U.S. Coast Guard advisories or call 914.789.3224.
  • Stay clear of all overhead work and maintain a safe distance of 1,000 feet from all construction equipment and support vessels.
  • Use the center 600 feet of the Main Channel to navigate in a north-south direction with no wake at a maximum speed of five knots.
  • All bridge piers and abutments are protected by a 25-yard security zone.
  • No unauthorized vessels are allowed in the Safety Zone surrounding 16 construction barge mooring locations. Lighted buoys mark the zone and mooring locations.
  • Regulated Navigation Areas (RNAs) stretch 500 yards north and 500 yards south of the existing bridge. No vessel may stop, moor, anchor or loiter within the RNAs.
  • The Eastern RNA will be extremely active and vessels transitioning to and from the eastern shoreline at Tarrytown should approach and depart to the north. The Western RNA will be impassable at times and mariners should stay clear of the area.
  • Lighted channel markers provide recreational boater access to the Piermont waterfront.
  • Construction barges and other vessels on the site are being tracked by GPS technology.
  • TZC will monitor Marine Radio Channel 16 to communicate with boaters.

The New York State Thruway Authority provides this information as a public service. Any reliance you place on such information is therefore strictly at your own risk. Nothing in these guidelines shall supersede the actual construction conditions, and regulations set forth by the U.S. Coast Guard.

Boater Documents

  • U.S. Coast Guard Notice to Mariners
  • U.S. Coast Guard Advisory Notice – May 13, 2016
  • Excerpt from Federal Register concerning U.S. Coast Guard’s RNA
  • U.S. Coast Guard Boater Safety Press Release
  • NNYB Boater Safety Project Update
  • U.S. Coast Guard Extended RNA Map
  • U.S. Coast Guard’s Temporary Navigational Lights Map

    In October 2013, temporary navigational lights were relocated as per the diagram below at the existing Tappan Zee Bridge across the Hudson River at mile 27.0. The new temporary navigational lighting plan includes marking the 600 foot wide main channel by affixing four-180° steady, red navigation lights to the underside of the main span, 2 each on the upstream and downstream sides of the structure, 300 feet either side of the centerline of the bridge. Each green center of channel light has 3 white lights stacked vertically above it. The center 600′ feet of the Main Navigation Channel will be free for the passage of marine traffic and clear of all obstructions at all times.
  • U.S. Army Corps of Engineers Approved Mooring Locations

    The map below is from the January 14, 2014 U.S. Army Corps of Engineers permit modification for the New NY Bridge Project to replace the Tappan Zee. It shows the approved temporary mooring locations for construction barges on the Hudson River during the project. There will be barges moored at these approved locations both day and night during the project and there will be up to 100 barges, crew boats and other vessels in the area at the peak of construction. Originally, there were 4 mooring locations established in the spring of 2013. 12 additional areas have been approved and the initial 4 will also be reconfigured. The U.S. Coast Guard has issued the following guidance in its Notice to Mariners: “When transiting the area mariners should stay clear of these locations by a minimum of 1000 feet. Mariners are advised to transit the main channel, reduce wake and use extreme caution while transiting the area in the vicinity of the Tappan Zee Bridge paying particular attention to vessel movement and future notices.
  • U.S. Army Corps of Engineers Permit