Manhattan Bridge, New York A wire cable suspension bridge with a main the span of 1470 feet, Manhattan Bridge was Worlds third longest from 1909 to 1924. Working under chief engineer Othniel Foster Nichols, Leon Moisseiff designed the bridge employing the first use of deflection theory on a suspension bridge. Considered to be the first modern suspension bridge, it was the earliest to use slender “two dimensional” steel towers with shallow stiffening trusses. It is an important link in New York’s rail transit system. Construction completed 1909 Designated 2009 National Historic Civil Engineer Landmark #downtownManhattan #NYChistory #historicmarkersofny #manhattanbridge #suspensionbridge #civilengineering #hidinginplainsight #bridgesofnyc #eastriver #20thCentury #landmarksofnewyork #Plaquesofnewyork #manhattanbridge @nycgo @nycarchives @downtownnyc @nyhistory @nycbridges (at Manhattan Bridge)