Editing Hawthorne Bridge (section)

== Statistics ==
The bridge consists of five fixed spans and one {{convert|244|ft|m|adj=mid|-long}} vertical-lift span. It is {{convert|1382|ft|m}} in total length.<ref name = "Wortman"/> The bridge was originally {{convert|63|ft|m}} wide,<ref name="Wood-1989">{{cite book |last=Wood |first=Sharon |title=The Portland Bridge Book |edition=1st |publisher=Oregon Historical Society Press |year=1989 |pages=37–42 |isbn=0-87595-211-9}}</ref> including two five-foot sidewalks, but the sidewalks were widened to 10&nbsp;feet in 1998, increasing the structure's overall width to {{convert|73|ft|m}}.<ref name = "Wortman"/> The {{convert|880000|lb|kg|adj=on}} counterweights are suspended from the two {{convert|165|ft|m|adj=mid|-tall}} towers.<ref name = "Wortman"/> It is operated by a pair of 150-horsepower motors.<ref>{{Cite web |date=September 21, 2010 |title=Vertical Lift Bridge |url=https://multco.us/bridges/vertical-lift-bridge |access-date=August 4, 2020 |website=Multnomah County |language=en |archive-date=October 23, 2019 |archive-url=https://web.archive.org/web/20191023133639/https://multco.us/bridges/vertical-lift-bridge |url-status=live }}</ref> On average, the lift span is raised for river traffic 120 times per month.<ref name = "Wortman"/>{{rp|62}} While the river is at low level, the bridge is {{convert|49|ft|m}} above the water, causing it to be raised an average of 200 times per month. As of 2001, the average daily traffic was 30,500 vehicles. The bridge was designed by [[Waddell & Harrington]], which also designed the [[Steel Bridge|Steel]] and [[Interstate Bridge|Interstate]] bridges.<ref name = "Wortman"/><ref>{{Cite web |date=May 12, 2020 |title=Hawthorne Vertical Lift Bridge |url=https://www.hardestyhanover.com/projects/hawthorne-vertical-lift-bridge/ |access-date=May 30, 2021 |website=Hardesty & Hanover |language=en-US |archive-date=June 2, 2021 |archive-url=https://web.archive.org/web/20210602215404/https://www.hardestyhanover.com/projects/hawthorne-vertical-lift-bridge/ |url-status=live }}</ref> [[John Alexander Low Waddell]] invented the modern-day vertical-lift bridge.<ref name = "Wortman"/>