Bibg D, the Two-headed Monster, and the Slab Setter.Monstrous equipment was specially designed and created the for job of driving piles,leveling and capping the piles,and setting the roadway slabs. This project was so big ,a 100-foot survey tower had to be constructed in the middle of the bay to make the exacting measurements required over both horizons.
Islands made of riprap.Thousands of car-sized boulders,knownas riprap,were dropped to create the outer rims of the four man-made Islands.They were then filled with nearly two million tons of sand and rock.Each island is about the size of Yankee Stadium.Most of the Bridge-Tunnel is comprised of low level trestle in water depths ranging between 30 and 45 feet.This helps to pass any size ship from the channel, because the draft of the ship is never more than 45 feet.
Dips Ahead.The underwater tunnels,each about a mile long, protect two of the world's most important shipping channels.From the Atlantic ocean, the Thimble Shoal Channel leads into Hampton Roads,and the Chesapeake Channel leads to the upper Chesapeake Bay.
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