Editing Burnside Bridge (section)

==Design==
The bridge was designed by [[Ira G. Hedrick]]<ref>[https://select.nytimes.com/gst/abstract.html?res=FA0C12F73B5A157A93CBAB1789D95F438385F9&scp=1&sq=%22Ira%20Grant%20Hedrick%22&st=cse Ira Grant Hedrick, Designer of Bridges; Built the Burnside Lift Span at Portland, Ore.-Firm Did Work in Mexico-Dies at 69]. ''[[The New York Times]]''.</ref> and [[Robert E. Kremers]], incorporating a [[Bascule bridge|bascule]] lift mechanism designed by [[Joseph Strauss (engineer)|Joseph Strauss]].<ref name=wood-wortman>{{cite book |last=Wood Wortman |first=Sharon |author2=Wortman, Ed |title=The Portland Bridge Book |edition=3rd |publisher=Urban Adventure Press |year=2006 |pages=45–52 |isbn=0-9787365-1-6}}</ref>

[[File:Burnside Bridge (south side) open.jpg|thumb|left|The bridge almost fully opened]]
Including approaches, the Burnside has a total length of {{convert|2308|ft|m|abbr=on}} and a {{convert|251|ft|m|abbr=on}} center span. While lowered, this span is normally {{convert|64|ft|m|0|abbr=on}} above the river. The deck is made of concrete, which contributes to its being one of the heaviest bascule bridges in the United States.<ref name=wood-wortman/> The [[counterweight]]s, housed inside the two piers, weigh {{convert|1700|ST|LT t|0}}. The lifting is normally controlled by the [[Hawthorne Bridge]] operator, but an operator staffs the west tower during high river levels.  As of 2005, the bridge opened for river traffic an average of 35 times a month.<ref name=wood-wortman/>{{rp|47}}

The bridge provides shelter for the initially unauthorized [[Burnside Skatepark]] under the east end.<ref>{{cite web |publisher=[[Dreamland Skateparks]] |title=Portland's Burnside Skatepark |url=http://www.dreamlandskateparks.com/burnside/index.html |access-date=2006-11-05 |archive-url=https://web.archive.org/web/20061108012452/http://www.dreamlandskateparks.com/burnside/index.html |archive-date=2006-11-08 |url-status=dead }}</ref> On weekends, the [[Portland Saturday Market]] was held mostly under the bridge's west end for many years. The market was reoriented in 2009, but the Burnside Bridge continues to provide shelter for a few vendor stalls at the market's northern end.