Cashman Dredging announced last Friday that the company has begun the 24/7 operations regarding the dredging of Boston Harbor.
As the company reported, Cashman will be removing approximately 11.7 million cubic yards of silt, blue clay, till and weathered rock over the next several years to deepen and widen the Harbor.
“ In order to perform quickly and efficiently, Cashman purchased a 33-cubic yard bucket. The bucket has 13 teeth and weighs 80,000 lbs ,” the company said.
The Federal Navigation Project for Boston Harbor includes deepening and widening the Broad Sound North Channel to -51 feet Mean Lower, Low Water (MLLW), deepening and widening the Main Ship Channel (MSC) to the Conley Terminal including the turning basin or “MSC Notch” to -47 feet MLLW, deepening the President Roads Anchorage and deepening the lower Reserved Channel to -47 feet MLLW.
Earlier this year, the Army Corps reported that the material dredged to create this federal navigation project will be placed at the Massachusetts Bay Disposal Site (MBDS) approximately 20 miles offshore of Boston Harbor with the exception of a small fraction of the material being placed as a cap to the Main Ship Channel Confined Aquatic Disposal cell, just downstream of the inner confluence of the Chelsea and Mystic Rivers.