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Pittsburgh - A City of Bridges
Picture of the Three Sisters - trio of identical suspension bridges

The Three Sisters - Sixth, Seventh & Ninth Street Bridges

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Picture of the Three Sisters Bridges in Pittsburgh Pennsylvania

The Sixth (Roberto Clemente), Seventh, and Ninth Street bridges are called the "Three Sisters" - the only identical trio of bridges in the United States. All three replaced former bridges, but the story of the Roberto Clemente (Sixth Street) Bridge is the most interesting - the original Sixth Street bridge burned in the late 1800's because the sparrows nests in the beams caught fire from the steamboat smoke stacks.


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Recommended Reading:

Pittsburgh's Bridges - Architecture & Engineering
Want to learn more about Pittsburgh's bridges? Consider Walter C. Kidney's expansive work packed with photos, history, architecture, stories and engineering of the many bridges of the city of Pittsburgh.

URL: http://pittsburgh.about.com/library/pictures/bridges/bl_bridge-7.htm
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