Second stage of TZ Bridge dredging begins

TARRYTOWN – The second phase of dredging of the Hudson River at the site of the new Tappan Zee Bridge will begin August 1 near the Westchester County shoreline.
Dredging is allowed during a three-month period from August 1 through October 31 in specified locations and will be conducted around the clock seven days per week to complete the work during that timeframe.  The window was established to avoid impacting migration and spawning patterns of local sturgeon and other fish species.
The new dredging is designed to create an access area for the super crane to remove sections of the existing bridge and build the southbound landing of the new bridge. The dredging will deepen the water level in the work zone by removing some 188,000 cubic yards of sediment from the river bottom.
Observers approved by National Marine Fisheries Services will oversee dredging activities to monitor for any possible sturgeon interaction and document any observed fish that may be collected.
Once the second stage of dredging by Tappan Zee Constructors is complete, approximately two feet of gravel will be placed in the channel to limit the stirring up of river sediment when working vessels traverse the area.