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Spring Garden Street Bridge is a highway bridge in Philadelphia, Pennsylvania, USA, that crosses the Schuylkill River below Fairmount Dam. It connects West Philadelphia to the Philadelphia Museum of Art and Benjamin Franklin Parkway. It is the fourth bridge at this location. The bridge is located at . ==1st bridge: The Colossus== As early as 1693, a ferry operated, crossing the Schuylkill River at Fairmount, the hill on which the Philadelphia Museum of Art now stands. Being upstream of the others, this was called the Upper Ferry. For the Upper Ferry site, bridgebuilder Louis Wernwag designed "The Colossus", the longest single-span wooden bridge in the United States. Construction began in April 1812, and it opened on January 7, 1813. A double-arched-truss with a clear span of , it was a marvel of engineering for its time. Also called the "Colossus of Fairmount", the "Upper Ferry Bridge", and the "Lancaster Schuylkill Bridge", the tollbridge was part of the Philadelphia and Lancaster Turnpike. It was destroyed by fire September 1, 1838. Thomas Birch painted at least two views of the bridge, and one of them was made into an 1813 engraving by Jacob J. Plocher. This "Upper Ferry Bridge" engraving was copied frequently on Staffordshire china. File:Fairmount Waterworks 1835 (cropped).jpg|"Schuylkill Waterworks" (1835), with "The Colossus" in the background. File:A View of Fairmount and the Waterworks by John Rubens Smith 1835.jpg|"A View of Fairmount and the Waterworks" (1835) by John Rubens Smith. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Spring Garden Street Bridge」の詳細全文を読む スポンサード リンク
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