Flood Barriers Construction
Although the dike closes up to a dozen times a year for storm events that bring southerly gales and tidal surges, a closure for a hurricane is a rare occurrence. Hurricane Bob in 1991 met the criteria for closure as the Category 2 storm impacted Southern New England causing over $1.5 Billion in damages. New Bedford's inner harbor was protected by the dike from a storm surge of 7.6 feet. A major hurricane hasn't impacted the region since.
On May 21, 1966 the dedication of the largest Hurricane Barrier in the world took place in New Bedford, MA. Forty-five years later, this massive stone structure has yet to be given the "ultimate test" for which it was designed for; a 1938 style Category 3 Hurricane.
Many agree that this barrier would have been met with resounding opposition by environmentalists today if an intrusive stone structure of this magnitude enclosing an entire bay was introduced. Environmental laws and stricter regulations that were virtually non-existent 45 years ago would have made this idea just a pipe dream today.
It cost $1,000 a foot, is long enough to span the 3.5 mile width of New Bedford, is as high (and wider ) than The Great Wall of China, and has enough steel in it to build a Navy destroyer. Its two huge steel navigational-sector gates weigh 400 tons apiece-each 35 tons heavier than the biggest locomotive ever built-and each as tall as a six-story house.
When the gates swing shut at the touch of a button to lock out devastating storm tides, they create a pond inside the barrier which could cover 6,500 acres of land with a foot of water. They keep out much more. More details
