© 2004 Ralph Greene, All Rights Reserved.
The Brooklyn Bridge incorporated many engineering firsts including: The first suspension bridge to use steel cables and the first bridge to use explosives in a dangerous underwater device called a caisson. The two arched towers, built of limestone and granite, reach a height of 276 feet above the river. They support the four suspension cables each 15.75 inches in diameter and 3578.5 feet long, containing 5434 wires each, for a total length of 3515 miles of wire per cable.
The Brooklyn Bridge is currently nominated to be included as a UNESCO World Heritage Site.