Editing Marquam Bridge (section)

==History==
Planning for the span started in 1956 as the last link in Oregon for the new [[Interstate Highway System]] for the main north-south route through the state.<ref name="hallman2015"/> Even prior to construction, it was decided to name the span after [[Philip Augustus Marquam|Philip Marquam]].<ref name="HAER"/> Marquam was a state legislator and [[Multnomah County]] judge, who owned much of [[Marquam Hill, Portland, Oregon|Marquam Hill]] where [[Oregon Health & Science University]] and the [[Veterans Affairs Medical Center]] now stand.<ref name="hallman2015">{{Cite news |last1=Hallman Jr. |first1=Tom |title=Marquam Bridge lacks beauty and basic amenities but excels in function: 'Spanning Oregon' |url=https://www.oregonlive.com/portland-bridges/2015/10/the_marquam_bridge_lacks_beaut.html |access-date=July 10, 2022 |work=Oregonlive / The Oregonian |date=October 24, 2015 |language=en}}</ref> Construction on the bridge's support piers began in January 1962.<ref>{{Cite news |last=Wood |first=Sharon M. |date=May 14, 1984 |title=Marquam Bridge signals new life in the fast lane |page=B5 |work=The Oregonian}}</ref> Construction on the bridge finished on February 28, 1966.<ref name="HAER"/> The lower southbound deck was opened on October 4, 1966, and the upper northbound deck on October 18, 1966.<ref name="HAER"/>
[[File:MarquamBridgeHill.jpg|thumb|left|The Marquam Bridge over the Willamette River, viewed from the southwest, atop Marquam Hill]]

The bridge was designed and built by the [[Oregon Department of Transportation]] at a cost of $14&nbsp;million, equivalent to ${{Formatprice| {{Inflation|US|14000000|1966|r=-3}} }} today. Funds for the project came from the [[Federal-Aid Highway Act of 1956|Federal Highway Transportation Act]].<ref name="HAER"/> The bridge was redecked in 1983.<ref name="HAER"/> In 1990, the approach lanes from both the east and west were widened to allow four lanes of traffic and an off-ramp to Water Avenue was built.<ref name="HAER"/> Due to its importance, the Marquam was the first Portland bridge to undergo a [[seismic retrofit]] in 1995, which included installation of Italian made [[Rolling-element bearing|bearings]] add to the piers.<ref>{{Cite web |title=Seismic Protection Devices Study – Marquam Bridge |url=https://www.oregon.gov/ODOT/Programs/ResearchDocuments/SeismicProtection.pdf |publisher=Oregon Department of Transportation |access-date=July 10, 2022 |date=April 2000}}</ref>