__NOTOC__ The Rachel Carson Bridge, also known as the Ninth Street Bridge, spans the

Allegheny River The Allegheny River ( ; ; ) is a tributary of the Ohio River that is located in western Pennsylvania and New York (state), New York in the United States. It runs from its headwaters just below the middle of Pennsylvania's northern border, nor ...

Downtown ''Downtown'' is a term primarily used in American and Canadian English to refer to a city's sometimes commercial, cultural and often the historical, political, and geographic heart. It is often synonymous with its central business district ( ...

Pittsburgh, Pennsylvania Pittsburgh ( ) is a city in Allegheny County, Pennsylvania, United States, and its county seat. It is the List of municipalities in Pennsylvania#Municipalities, second-most populous city in Pennsylvania (after Philadelphia) and the List of Un ...

in the

United States The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 U.S. state, states and a federal capital district, Washington, D.C. The 48 ...

. Named for the naturalist and author

Rachel Carson Rachel Louise Carson (May 27, 1907 – April 14, 1964) was an American marine biologist, writer, and conservation movement, conservationist whose sea trilogy (1941–1955) and book ''Silent Spring'' (1962) are credited with advancing mari ...

, a Pittsburgh native, it is one of three parallel bridges called the Three Sisters, the others being the Roberto Clemente Bridge and the Andy Warhol Bridge. The Three Sisters are self-anchored suspension bridges and are significant because they are the only trio of nearly identical bridges—as well as the first self-anchored suspension spans—built in the United States. All three bridges were built by the American Bridge Company. The total length of the Rachel Carson Bridge is including the main span and two side spans, or including the approaches. The total width of the deck is , including the roadway plus two sidewalks outside the compressive plate girder. Whereas the roadway formerly carried two vehicle lanes and two streetcar tracks, it was changed to carry four wide vehicle lanes. The 2019-2020 refurbishment reduced the lanes to three.

History

The Rachel Carson Bridge was dedicated and opened during a noontime ceremony with Commissioner Babcock, Mayor Kline, and city council members including Herron and McArdle in attendance. The cost of construction was $1.46 million or $ in terms. The bridge was renamed on

Earth Day Earth Day is an annual event on April 22 to demonstrate support for environmental protection. First held on April 22, 1970, it now includes a wide range of events coordinated globally through earthday.org (formerly Earth Day Network) includin ...

, April 22, 2006, after years of lobbying by Esther Barazzone, president of Chatham University, the alma mater of the renowned

environmentalist Environmentalism is a broad Philosophy of life, philosophy, ideology, and social movement about supporting life, habitats, and surroundings. While environmentalism focuses more on the environmental and nature-related aspects of Green politics, g ...

. Carson was born in 1907 in Springdale, Pennsylvania, in a farmhouse up the Allegheny River, now the Rachel Carson Homestead. On February 11, 2019, the bridge was closed to vehicles and pedestrians for a comprehensive rehabilitation project. The bridge was expected to remain closed until at least June 2020. Traffic was detoured over either the Andy Warhol Bridge or the Roberto Clemente Bridge, both of which run parallel and are less than 1/2 mile away from the Rachel Carson Bridge. The bridge reopened in November 2020 after the completion of a $23.3 million rehabilitation project. It was reconfigured from four lanes to three with the direction of the middle lane depending on time of day.

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External links

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at pghbridges.com
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at BridgeMeister.com {{NRHP bridges Carson Bridges completed in 1926 Bridges over the Allegheny River Road bridges on the National Register of Historic Places in Pennsylvania

Bridge A bridge is a structure built to Span (engineering), span a physical obstacle (such as a body of water, valley, road, or railway) without blocking the path underneath. It is constructed for the purpose of providing passage over the obstacle, whi ...

Pittsburgh History & Landmarks Foundation Historic Landmarks Suspension bridges in Pennsylvania Self-anchored suspension bridges Historic American Engineering Record in Pennsylvania 1926 establishments in Pennsylvania National Register of Historic Places in Pittsburgh

History

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References

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