The Brooklyn Bridge, or how Washington Roebling directed the world's longest span from a sickroom
On a morning in June 1869, John Augustus Roebling was standing at the Manhattan ferry slip, taking sightings for the bridge he had designed to cross the East River, when an incoming boat swung against the dock and crushed his foot. He refused full amputation, developed tetanus, and died three weeks later. His son Washington, thirty-one years old, inherited the project.
John Roebling’s design was the most ambitious bridge yet attempted: granite towers rising 278 feet above the East River, four main cables strung between them carrying a deck 135 feet above the water, a main span of 1,595 feet — more than a quarter mile. It would connect Manhattan to Brooklyn, then the fourth-largest city in the United States, replacing a ferry crossing that iced over in winter and capsized in storms. Washington Roebling was now its chief engineer. The project would nearly ruin him too.
The bottleneck was the riverbed. Reaching solid rock required pneumatic caissons — pressurized timber chambers the size of warehouses, with compressed air holding back the river while workers dug. The Brooklyn caisson went 44.5 feet down; the Manhattan side reached 78.5. Workers who surfaced too quickly suffered “caisson disease” — decompression sickness — which could paralyze or kill. In 1872, Washington Roebling suffered a severe attack that left him partially paralyzed, half-blind, and hard of hearing.
He directed the remaining eleven years from a bedroom on Columbia Heights — through a telescope trained on the site, and through his wife Emily, who learned cable mathematics and managed contractors and trustees in his place. Emily appeared at the bridge site so often that visitors sometimes took her for the chief engineer. Four main cables, each carrying 5,434 parallel steel wires bundled by a method all later bridges would inherit, were spun in place over eighteen months.
In 1878, with the cables being laid, Roebling discovered that J. Lloyd Haigh, the steel-wire contractor, had been running a substitution scheme. Inspectors would test a batch, mark it approved; Haigh’s men would return after hours and swap the good wire for previously rejected stock, shipping the bad material to the bridge with forged paperwork. By the time Roebling caught it, 221 tons of substandard steel had been spun into the cables. He brought this to the board of trustees. Several members had financial ties to Haigh and told him to continue working with the man. Roebling declined. Instead he calculated the precise shortfall and added 150 extra quality wires to each cable, charged to Haigh — since the original design was already built to six times the load it would ever carry. The bridge was stronger for the fraud than it would have been without it.
The bridge opened on May 24, 1883, with President Chester A. Arthur in attendance and roughly 150,000 spectators on both shores. It was the first major suspension bridge built with steel wire cables rather than iron, proving a material that could carry spans iron never reached. The wire-bundling method, the caisson foundations, the safety margins against the unknown — all of it was inherited by the Williamsburg Bridge, the George Washington, and the Golden Gate.
Washington Roebling lived until 1926, long enough to watch the world build bigger on his methods. By then the bridge was simply there — the kind of structure people forget had to be invented, much less fought over.
Sources
- Brooklyn Bridge — Wikipedia — span, tower heights, opening date and attendance figures, Roebling family succession.
- Brooklyn Bridge: An Engineering Marvel — ASCE Civil Engineering — caisson depths, 5,434-wire cable construction, Emily Roebling’s role managing daily operations.
- Corruption Was Built Into the Brooklyn Bridge — The Daily Beast — Haigh wire fraud details, 221-ton figure, Roebling’s compensatory fix and the six-times safety factor.