![]() Survey boats are brought in to certify the new depth of the harbor or waterway. The rocks loosened from the resulting blast are collected by an excavator dredge. The holes are then filled with a liquid explosive called Porvex. Drill boats are used to make holes in rock, 6 feet deeper than the intended rock removal depth and approximately 10 feet apart. ![]() The removal of rock is entirely different–and much more exciting and destructive. Soft or loose material on the harbor floor is removed by a clamshell bucket attached to a barge-mounted crane, which places the sediment on an scow that is carried to a final disposal site. ![]() New York also houses the largest barge-mounted dredge in the world, which can drill down to 65 feet, has a bucket the approximate size of a garbage truck, and is appropriately named “T-Rex.” New York Harbor’s dredging process involves up to eighty pieces of dredging machinery, making for the largest concentration of dredging equipment ever assembled in America. Ships have only grown larger since then, and harbor dredging has only intensified to accommodate them.
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |