Progress Update, Week of May 20th, 2024 During the week of May 20, the Gowanus Remediation Team (GRT) continued the RTA 1 Capping Operation. Supplemental dredging near Douglass St. continued. Sediment was removed. Debris was removed from the Flushing Tunnel. Photos of construction activities are provided below. Material removed from Flushing Tunnel. Water Treatment Barge anchored south of Carroll Street