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When did the Galloping Gertie bridge collapse?

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The original Tacoma Narrows Bridge twisted and vibrated violently under 40-mile-per-hour (64 km/h) winds the day of the collapse.

  • Design: Suspension
  • Longest span: 2,800 feet (853.4 m)
  • Total length: 5,939 feet (1,810.2 m)
  • Clearance below: 195 feet (59.4 m)
  • Opening date: July 1, 1940
  • Collapsed: November 7, 1940
  • Coordinates 47°16′00″N 122°33′00″W/47.266667°N 122.55°W/47.266667; -122.55Coordinates: 47°16′00″N 122°33′00″W/47.266667°N 122.55°W/47.266667; -122.55

The original Tacoma Narrows Bridge opened on July 1, 1940, and dramatically collapsed into Puget Sound on November 7 of the same year. The suspension bridge spanned the Tacoma Narrows strait between Tacoma and the Kitsap Peninsula. Its replacement was opened in the same location in 1950, and a second, parallel bridge opened in 2007. The instability in winds inspired the nickname Galloping Gertie.

Includes CC-BY-SA content from Wikipedia's Tacoma_Narrows_Bridge_(1940) article (authors)

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