Arthur Kill Channel Navigation Improvement Project, Contract 11 (S-NB-2/S-AK-1)
The Arthur Kill is a tidal strait and a kill between Staten Island and Union and Middlesex counties in northern New Jersey. A major navigational channel, it is ~10 miles long and connects Newark Bay with Raritan Bay. Along the New Jersey side, it is lined with industrial sites; the Staten Island side is lined with salt marshes.
To prepare the Port of NY/NJ for post-Panamax vessels, a CASHMAN JV was contracted to deepen the existing 43’-47’ MLW channel to a depth of 52’ MLW (+1.5’ overdredge). Marine operations included various types of dredging, including environmental dredging of contaminated sediments and disposal within a CAD cell; controlling marine traffic; and coordination with local, state and federal authorities.
- Drilled and blasted 2.1 million square feet of rock.
- Dredged 2.9 million CY of silt, clay, sand and blasted rock.
- Transported rock to Axel Carlson Reef construction site 45 nautical miles off the coast of New Jersey.
- CASHMAN processed and transported suitable rock material to the Historic Area Remediation Site (HARS) 25 nautical miles away.
- Silt material not suitable for the HARS was processed and transported to an approved, permitted upland disposal facility for beneficial reuse.
- Additionally, the team processed and transported suitable silt material to the HARS as part of the Mud Dump Site (MDS) capping project.
- Used articulated buoys (using a pivoting post as opposed to a chain to connect the buoy to the anchor) to mark the blast area more accurately by preventing buoy drift.
- Equipped all vessels with an Automated Disposal Surveillance System (ADISS) and an Automatic Identification System (AIS) for tracking.
- Maintained environmental windows and working distances from protected species.