The Brooklyn Bridge is located in New York City which connects Manhattan to Brooklyn. Constructed from 1870 to 1883, this bridge is made of steel cables and masonry towers. How long will this bridge last without people?
100 Years after People: After a century without people, the Brooklyn Bridge is weak, the steel cables are galvanized. The roadway is held up by just over a thousand vertical steel or hanger cables. but after the galvanizing breaks down and a few cables snap, the remaining cables snap and the roadway collapses into the waters of the East River below.
150 Years after People: The end parts of the roadway finally collapse onto the other roadways below. Now, only the crumbling stone towers remain. These stone towers may remain intact for a few more centuries.
500 Years After People: The two masonry towers are in weak condition. The two openings where the roadway once sat is in dire need of maintenance. A catenary cable snaps and one tower falls inward in the openings. This makes a 2.0 quake with the falling debris and the second tower falls outward and the only sign of a bridge is hidden in the river. Seconds later the Manhattan Bridge collapses, causing it to fall down in the river.