霍桑大橋

霍桑大橋（英語：Hawthorne Bridge）是俄勒岡州波特蘭市的一座跨越威拉米特河的桁架升降橋，也是美國最古老的垂直升降橋^[1] 和波特蘭最古老的公路橋^[2]^[1]，於2012年列入國家史蹟名錄^[3]^[4]。

參考文獻

[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]. （原始內容 (PDF)存檔於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]. （原始內容存檔於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]. （原始內容存檔於2018-09-08）.