Rachel Carson Bridge

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Rachel Carson Bridge
Pittsburgh Ninth Street Bridge.jpg
Rachel Carson Bridge as seen from the roof of the David L. Lawrence Convention Center
Official name Rachel Carson Bridge
Other name(s) Ninth Street Bridge
Carries Ninth Street
Total length 840 feet (256 m) spans (main and 2 215 side spans) 995 feet (303 m) with approaches
Width 38 ft roadway (formerly 2 vehicle, 2 tramway tracks, now 2 wide vehicle lanes) 10 ft sidewalks (outside the compressive plate girder) or total 62 ft
Longest span 410 feet (125 m)
Vertical clearance above 78 ft towers
Clearance below deck is 40.3 ft above Emsworth Dam normal pool level (710 ft above sea level)
Opened 26 November 1926
Coordinates 40°26′48″N 79°59′59″W / 40.4467°N 79.9998°W / 40.4467; -79.9998Coordinates: 40°26′48″N 79°59′59″W / 40.4467°N 79.9998°W / 40.4467; -79.9998

Rachel Carson Bridge, also known as the Ninth Street Bridge, spans the Allegheny River in Downtown Pittsburgh, Pennsylvania.

Named for the naturalist Rachel Carson, 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.

The bridge was renamed on Earth Day, April 22, 2006, after years of lobbying by Esther Barazzone, president of Chatham University, the alma mater of the renowned environmentalist. Carson was born in 1907 in Springdale, Pennsylvania in a farmhouse 18 miles up the Allegheny River, now the Rachel Carson Homestead.

Image gallery[edit]

Plaque on North Shore of the Ninth Street Bridge in Pittsburgh, PA.
From south bank of the Allegheny, looking NE, oblique view of roadway and south tower, showing eyebar links for main suspenders and roadway suspenders, as well as main compressive stiffening girders dividing roadway from sidewalks 
Plaque on North Shore of the Rachel Carson Bridge. 

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