霍桑大桥

霍桑大桥（英语：Hawthorne Bridge）是俄勒冈州波特兰市的一座跨越威拉米特河的桁架升降桥，也是美国最古老的垂直升降桥^[1] 和波特兰最古老的公路桥^[2]^[1]，于2012年列入国家史迹名录^[3]^[4]。

[1]
Wood Wortman, Sharon; Wortman, Ed. The Portland Bridge Book 3rd. Urban Adventure Press. 2006: 61–68. ISBN 0-9787365-1-6.
[2]
2011 Bicycle Counts Report. Portland Bureau of Transportation. [April 24, 2013]. （原始内容 (PDF)存档于2021-04-26）.
[3]
Weekly list of actions taken on properties: 11/13/12 through 11/16/12. National Park Service. November 23, 2012 [April 24, 2013]. （原始内容存档于2016-03-12）.
[4]
Tims, Dana. Four Multnomah County bridges listed on National Register of Historic Places. The Oregonian. November 20, 2012 [December 9, 2014]. （原始内容存档于2018-09-08）.

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