Dredging and Capping Pilot Study on the Gowanus Canal

Dredging and Capping Pilot Study

Dredging and Capping Pilot Study on the Gowanus Canal

Boerum Hill
Carroll Gardens
Cobble Hill
Gowanus
Park Slope

According to workers on the site, the large crane pulled into the Fourt Street Basin of the Gowanus Canal in late Otober 2017 and is a part of the Dredging and Capping Pilot Study to rebuild the bulkheads along the canal with metal prior to the dredging of the canal.

The first phase of the project, referred to as the Dredging and Capping Pilot Study, involved the removal of debris from the bottom of the canal in the basin. This second phase, with the large crane, will include dredging contaminated sediment from the turning basin and placing a multi-layered protective cover (or cap) on the original canal bottom. Before dredging, steel sheeting will be installed in front of the existing bulkheads along the shoreline at appropriate depths to provide stuctural support.

Once dredging begins, the contaminated material will be taken by barge to the Citizens MGP State Superfund Site located in a secured, open lot at Smith Street and Huntington Street. Water drained from the sediment will be environmentally treated before being released back into the canal. Cement-like material will be added to the de-watered sediment in order to stabilize it before shipment by barge to off-site licensed disposal facilities. This material will be reused for landfill cover.

The EPA expects to complete the Dredging and Capping Pilot Study effort in the Spring of 2018. The results will be used to evaluate and finalize the dredging and capping of the entire canal.

 

 

VIEW "25 Years of Gowanus: As it WAS, As it IS" - MARK D PHILLIPS' PHOTO EXHIBIT OF THE GOWANUS CANAL

 


Installing steel sheeting in the Fourth Street basin of the Gowanus Canal

 

On Monday, October 23, 2017, the barge containing the crane was positioned right by the Third Avenue Bridge behind Whole Foods. The crane dropped long beams into the bottom of the canal to act as anchors as the work is done.