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Progress Update, Week of March 22, 2021

During the week of March 22, the Gowanus Remediation Team continued work along the canal. Our crews relocated the dredging barge to prepare for dredging south of the Carroll Street Bridge. Debris was removed and the site was inspected in advance of resuming dredging. Dredging south of the Carroll Street Bridge will continue over the coming weeks.

Additionally, this week our crews conducted pin pile installation at Turning Basin 1 (TB1). This operation involves driving steel piles (similar to steel beams) into the canal bed at multiple locations in order to support steel templates utilized as a guide for pipe pile installation. Pipe piles will be installed at TB1 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.

The dredged material is loaded from smaller “mini” hopper barges that can navigate the narrow canal to the transloading area at Huntington Street. The dredged material is then dewatered and transloaded to larger barges and shipped across New York Harbor to the dredged material processing facility in New Jersey.

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.

Completed reassembly of the dredging barge.
Raising the TB1 pin piles.
Debris removal between 3rd Street and Carroll Street.
Continued debris removal between 3rd Street and Carroll Street.
Dewatering and transloading mini hopper barge materials into the large hopper barge.