CBSNews Redux

I have worked around "wet" construction sites in archaeology (remains of a New Amsterdam warehouse, the wharves under the former US Assay site, behind "sheeting" there too, on a c. 1730 ship hulk used as landfill near the orginal shoreline, and researched the original ferry to Brooklyn site, there Puritan Isaac Allerton, from the Mayflower, kept a warehouse just outside the "Wall" that became Wall Street, at the Water Gate, much of NYC's shore is filled, a couple of blocks in, in the proposed Dutch "polders" for the Hackensack Meadowlands, sections to be turned over for machine farming, too topsy-turvy however, the "meadows" once dammed and breached in a storm in the 1940's, ship-hulks under the Bear Mountain Bridge, other sites along the Hudson River, etc.) and have seen different technologies advanced for construction in less than "fastland" sites. Today there are computers in the cabins of construction equipment that can bore straight down, like a large hollow drill, which can be replaced with I-beam and concrete. I worked a number of years ago in sight of a French company's "slurry wall" being built. 17 ton jaws cut a narrow trench, filled with bentonite slurry to force the surrounding water out, and carry out the debris it and a two-story high chisel dropped into bedrock caused. Huge rebar meshes were lowered into the slurry and concrete poured section by section. I wonder what new technology might be available for N'orlins?