Pittsburgh's Bridges: The Story of the City of Bridges

Introduction: The City of Bridges

Pittsburgh isn’t just famous for steel or sports. It is known as “The City of Bridges.” A 2006 study counted 446 bridges in the city, though that number has been disputed, and the city is often said to have more bridges than Venice, Italy. These structures are more than concrete and steel; they show Pittsburgh’s grit, innovation and resilience.

Each bridge tells a story of the engineers who dared to span the rivers and the city that grew upward and outward thanks to these crossings. Today Pittsburgh’s bridges are landmarks of both history and design.

Geography Demanded Greatness: Why So Many Bridges?

Three rivers, the Allegheny, Monongahela and Ohio, converge in downtown Pittsburgh. Combined with steep hills and deep ravines, the geography left city planners little choice. Without bridges, the region would be a series of fragmented valleys, hillsides, river plains and isolated communities.

The first river bridges were wooden, at Smithfield Street in 1818 and at Sixth Street in 1819. Pittsburgh then waged a massive road and bridge building campaign from 1924 to 1940, and most of its oldest major bridges date from that period. The Interstate system brought another wave of construction in the second half of the twentieth century. The result is a collection of most of the major bridge types, including suspension, cantilever and arch, mostly built from locally made steel, with about forty river spans. Many downtown bridges are painted Aztec Gold to match the city’s black and gold. For the steel behind them, see our history of the rise and fall of Pittsburgh’s steel industry.

Pittsburgh’s Most Iconic Bridges (And Where to See Them)

The Smithfield Street Bridge (1883)

Location: Downtown, spanning the Monongahela River to Station Square
Designer: Gustav Lindenthal
Claim to Fame: Among the oldest steel bridges in the United States and the city’s oldest bridge still in service; a lenticular truss bridge and a National Historic Landmark (1976)
It is the third bridge at the site. Louis Wernwag’s wooden bridge of 1818 was destroyed in the Great Fire of 1845, and John A. Roebling then built a wire-rope suspension bridge. Lindenthal’s bridge, which opened on March 19, 1883, reused Roebling’s stone piers.
Streetcars crossed it until July 1985, and it is said to be the most heavily walked bridge in the city.

The Roberto Clemente Bridge (1928)

Location: Sixth Street, North Shore to Downtown, spanning the Allegheny River
Type: Self-anchored suspension bridge, officially renamed for Pirates star Roberto Clemente in 1998
Fun Fact: Closed to cars on Pirates game days, providing a walking route to PNC Park.

It is part of the famous “Three Sisters” (with the Andy Warhol and Rachel Carson bridges), built between 1924 and 1928 by the American Bridge Company. They are the only trio of nearly identical bridges, and the first self-anchored suspension spans, built in the United States. The bridge replaced earlier ones, including a Roebling suspension bridge from 1859.

The Fort Pitt Bridge (1959)

Location: Interstate 376, crossing the Monongahela
Designer: George S. Richardson; opened June 19, 1959, as a replacement for the Point Bridge
Known For: The dramatic entrance to the city. Drivers leaving the Fort Pitt Tunnel, which opened in 1960, are suddenly greeted by the entire downtown skyline, a view The New York Times called the best way to enter an American city.

The Hot Metal Bridge (1900; reopened 2000 and 2007)

Carried ladle cars of molten iron from J&L Steel’s blast furnaces to its open hearth furnaces across the Monongahela. During World War II about 15 percent of America’s steel-making capacity crossed it.
The upstream span, a railroad bridge from 1887, was converted for road traffic in 2000, and the 1900 span reopened to pedestrians and cyclists in late 2007. The Great Allegheny Passage trail crosses it, with good city views.

The Liberty Bridge (1928)

A steel cantilever bridge over the Monongahela designed by George S. Richardson, which opened on March 27, 1928, as the missing link between downtown and the Liberty Tunnel to the South Hills.
It remains a commuter artery. A fire during construction work closed it for 24 days in September 2016.

More Bridges Worth Knowing

Fort Duquesne Bridge (opened 1969): A bowstring arch over the Allegheny, nicknamed “The Bridge to Nowhere” because its main span was finished in 1963 but the approach ramps were not. In 1964 a student drove off the unfinished end and landed on the other side.
Panhandle Bridge (1903): Built for the Pennsylvania Railroad’s Panhandle Route and now carrying Pittsburgh’s light rail over the Monongahela since 1985.
16th Street Bridge (1922): A steel arch connecting the Strip District and the North Shore, renamed the David McCullough Bridge in 2013 for the Pittsburgh-born historian. It was falsely reported to have collapsed after the 1936 flood.
Birmingham Bridge (1976): A bowstring arch between the South Side and Uptown.

Steel, Innovation, and Risk: Engineering Feats of Their Time

Pittsburgh’s bridges became engineering showcases because they had to be. Each bridge tested new materials, designs and construction methods.

Steel Innovation: Locally produced steel built most of the city’s bridges, and the Smithfield Street Bridge is among the oldest steel bridges in the United States.
The Three Sisters: The first self-anchored suspension bridges in the U.S. Their design answered War Department clearance rules and a lack of anchorage points along the riverbanks.
Fort Pitt Bridge: A double-decked bowstring arch bridge.

For the railroads that needed many of these crossings, see our history of Pittsburgh’s railroads and Union Station.

The Bridges as Cultural Symbols

Today these bridges are more than infrastructure. They are symbols of Pittsburgh pride, woven into:

Sports: The Clemente Bridge becomes a fan walkway on Pirates game days.
Film: The Smithfield Street Bridge appears in Flashdance and Striking Distance, the Hot Metal Bridge in Warrior, and the Fort Pitt Bridge in The Perks of Being a Wallflower. See famous movies filmed in Pittsburgh.

Preservation and Challenges of Aging Infrastructure

Many bridges face the same fate as the industries they once served: rust, neglect and deferred maintenance. A 2011 study by Transportation for America found that 1,194 bridges in the Pittsburgh area, or 30.4 percent, were deficient, the highest proportion in the nation.

The best-known failure was the Fern Hollow Bridge collapse on January 28, 2022, when the Forbes Avenue bridge over Frick Park fell at 6:39 a.m., injuring at least ten people. No one was killed. President Biden was in town that day for a planned infrastructure speech and visited the collapsed bridge. The 1973 bridge had been rated in poor condition since 2011, and the National Transportation Safety Board’s 2024 final report faulted both city and state inspection and maintenance processes. A new concrete bridge was dedicated on December 20, 2022.

Pittsburgh’s Bridges in Numbers

446 bridges counted in a 2006 study (disputed)
About 40 river crossings
1924 to 1940: the big building campaign behind most of the oldest major bridges
Three Sisters: the only trio of nearly identical bridges in the U.S.

Conclusion: The Bridges That Built a City

Pittsburgh would not exist as we know it without its bridges. They are monuments to the city’s ingenuity and its ability to overcome rivers, hills and history. Each is a chapter in Pittsburgh’s story, a physical reminder of the generations who labored to connect a growing city.

Keep Reading

Sources: Wikipedia articles on the bridges of Pittsburgh, the Smithfield Street, Roberto Clemente, Fort Pitt, Hot Metal, Liberty, Fort Duquesne, Panhandle, 16th Street, Birmingham and Fern Hollow bridges, the Three Sisters and the Fort Pitt Tunnel, and the NTSB’s Fern Hollow report.