How the Brooklyn Bridge Was Built—and Why It Remains an Engineering Wonder

When the Brooklyn Bridge opened on May 24, 1883, it was more than a new route across the East River. It was the longest suspension bridge in the world, the first permanent connection between the then-independent cities of Brooklyn and New York, and a breathtaking demonstration of what American engineering could accomplish.

Building it required 14 years, approximately $15 million, and the persistence of three remarkable members of the Roebling family.

A Bridge Many Believed Could Not Be Built

By the mid-nineteenth century, Brooklyn and Manhattan were expanding rapidly, but the East River could only be crossed by ferry. Ice, fog, congestion, and severe weather frequently disrupted travel. Yet constructing a bridge posed an extraordinary challenge: it had to span a busy tidal waterway without obstructing the masts of ships entering one of the world’s busiest ports.

Engineer John A. Roebling proposed an audacious solution—a monumental suspension bridge with a central span of 1,595.5 feet and a roadway rising 135 feet above the river. Its total length, including the approaches, would exceed 6,000 feet. Roebling died from tetanus after an accident near the construction site in 1868, leaving his son Washington Roebling to oversee the project as chief engineer.

Dangerous Work Beneath the East River

The bridge’s enormous granite-and-limestone towers rest upon caissons: vast, bottomless wooden chambers sunk into the riverbed. Compressed air kept water from entering while laborers—often called “sandhogs”—excavated mud, gravel, and rock beneath the structures.

Conditions inside were hot, noisy, and dangerous. Workers emerging too quickly from the pressurized chambers sometimes developed what physicians called “caisson disease,” now known as decompression sickness or the bends. Washington Roebling was among those seriously injured, leaving him unable to supervise construction regularly in person.

His wife, Emily Warren Roebling, became essential to the bridge’s completion. She carried Washington’s instructions to the construction site, communicated with engineers and contractors, maintained records, and mastered technical subjects including cable construction, stress analysis, and the calculation of catenary curves. Her contribution was finally acknowledged during the bridge’s 1883 dedication.

An Engineering Achievement That Changed New York

The Brooklyn Bridge pioneered the large-scale use of steel-wire suspension cables. Four immense main cables carried the roadway between its Gothic-inspired towers, while vertical suspenders and diagonal stays added strength and stability. Its elevated pedestrian promenade was also visionary, allowing people to cross above the traffic while enjoying extraordinary views of the New York Harbor and the Manhattan skyline.

The bridge immediately transformed movement between Brooklyn and Manhattan and helped bind the two cities economically and socially—15 years before they became part of a consolidated New York City. Its hybrid suspension system influenced later bridge engineering, while its union of stone, steel, utility, and beauty made it an enduring symbol of New York’s ambition.

Today, millions recognize the Brooklyn Bridge, but far fewer know the human drama behind it.

To experience the bridge where its history unfolded, join our Brooklyn Revolution Walking Tour. Walk across this engineering masterpiece with an experienced New York City historian, hear the remarkable stories of the Roeblings and the people who built it, and discover how the Brooklyn Bridge helped revolutionize New York. Book your Brooklyn Revolution Walking Tour and see one of America’s greatest landmarks with new eyes.