During the week of April 12 the Gowanus Remediation Team continued working along the canal. Crews raked the canal bed and mobilized additional equipment for pile driving operations.

The canal bed was raked between 3rd Street and Carroll Street using an excavator equipped with a rake attachment. Raking is conducted as preparation for in-situ stabilization (ISS), a remediation process by which contaminants are rendered immobile through reactions with stabilizing compounds mixed directly into the soil or sediment. ISS will begin in RTA 1 in Summer of 2021.

Staging at the pipe pile work barge remains ongoing between 3rd Street and Carroll Street. Equipment mobilization and material preparations are continuing. Crews began probing pipe pile installation locations for possible obstructions. Any obstructions that are identified will be safely removed prior to pipe pile installation.

Pipe piles will be installed at Turning Basin 1 (TB-1) to create a temporary bulkhead wall to support fill materials on the upland side of the canal while dredging occurs. Ultimately, the Carroll Street Bridge and the Union Street Bridge will have pipe pile walls installed as bulkheads to support the bridge abutments during future phases of dredging. Next week crews will continue preparing for pipe pile installation at TB-1.

The Carroll Street Bridge will remain in the open position while the New York City Department of Transportation (NYCDOT) performs maintenance on the bridge. Carroll Street will be closed to vehicular and pedestrian traffic until further notice.

Photos of construction activities are provided below.


Raking the ISS areas between 3rd Street and Carroll Street.


Raking the ISS areas between 3rd Street and Carroll Street.


Probing for obstructions along the southern portion of the Carroll Street bridge.


Outfitting the work barge.


Continued outfitting the work barge.