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- 0.1078992 (dbd:kilometre)
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- The 20th Avenue NE Bridge (also known as the Ravenna Park Bridge) is a three-hinged, steel, lattice-arched bridge that spans a ravine in Seattle's Ravenna Park. It was designed by Frank M. Johnson under the direction of city engineer Arthur Dimock. Built in 1913, the structure is both listed in the National Register of Historic Places and is a designated city landmark. The structure is 354 ft (108 m) long. It has a 250 ft (76 m) arch that rises 41 ft (12 m) over the ravine. It supports an 18 ft (5.5 m) reinforced concrete roadway. Beginning on March 11, 1975, a four-month trial began wherein the bridge was closed to vehicular traffic. The bridge did not meet the standards for arterial roads at the time, and upgrading the bridge would have been cost prohibitive. The trial period was successful and the bridge has been closed to vehicle travel ever since, but it is accessible by pedestrians and cyclists.
* The newly constructed 20th Avenue NE Bridge (now known as Ravenna Park Bridge), Seattle, Washington, U.S., 1914. Originally a bridge for automobiles, it was eventually pedestrianized.
* A person rides a bike over the 20th Avenue NE Bridge. (en)
- 第二十大道东北大桥（英語：20th Avenue NE Bridge），又称拉文纳公园大桥（英語：Ravenna Park Bridge），是一座位于美国西雅图深谷之上的三铰钢桁拱桥。大桥由弗兰克·M·约翰逊在城市工程师阿瑟·迪莫克的指导下设计。大桥于1913年建成投入使用，并被列入美国国家史迹名录和中。 大桥总长108米（354英尺），横跨整个深谷的主拱长76.3米（250英尺），高12.4米（41英尺）。大桥桥面为5.5米（18英尺）宽的水泥路面。大桥自1975年起对机动车关闭，并作为人行道桥向行人开放。
* 图为1914年刚刚建造完成时的第二十大道东北大桥（常称拉文纳公园大桥），大桥最初为公路桥，现已改为人行道桥 (zh)
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- 6155 (xsd:nonNegativeInteger)
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- A steel-arched bridge over a wooded ravine (en)
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- 0001-01-17 (xsd:gMonthDay)
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- 第二十大道东北大桥（英語：20th Avenue NE Bridge），又称拉文纳公园大桥（英語：Ravenna Park Bridge），是一座位于美国西雅图深谷之上的三铰钢桁拱桥。大桥由弗兰克·M·约翰逊在城市工程师阿瑟·迪莫克的指导下设计。大桥于1913年建成投入使用，并被列入美国国家史迹名录和中。 大桥总长108米（354英尺），横跨整个深谷的主拱长76.3米（250英尺），高12.4米（41英尺）。大桥桥面为5.5米（18英尺）宽的水泥路面。大桥自1975年起对机动车关闭，并作为人行道桥向行人开放。
* 图为1914年刚刚建造完成时的第二十大道东北大桥（常称拉文纳公园大桥），大桥最初为公路桥，现已改为人行道桥 (zh)
- The 20th Avenue NE Bridge (also known as the Ravenna Park Bridge) is a three-hinged, steel, lattice-arched bridge that spans a ravine in Seattle's Ravenna Park. It was designed by Frank M. Johnson under the direction of city engineer Arthur Dimock. Built in 1913, the structure is both listed in the National Register of Historic Places and is a designated city landmark.
* The newly constructed 20th Avenue NE Bridge (now known as Ravenna Park Bridge), Seattle, Washington, U.S., 1914. Originally a bridge for automobiles, it was eventually pedestrianized.
* (en)
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- 20th Avenue NE Bridge (en)
- 第二十大道东北大桥 (zh)
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- 20th Avenue NE Bridge (en)
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