| 词条 | 20th Avenue NE Bridge |
| 释义 |
| bridge_name = 20th Avenue NE Bridge | native_name = | native_name_lang = | image = Ravenna Park Bridge 06 - colormapped.jpg | image_size = | alt = A steel-arched bridge over a wooded ravine | caption = | official_name = | other_name = Ravenna Park Bridge | carries = | crosses = | locale = | owner = | maint = | id = | architect = | designer = Frank M. Johnson | engineering = Arthur Dimock | design = Deck Arch | material = Steel | length = 354 feet (108 m) | width = 18-foot (5.5 m) | height = | mainspan = | spans = | pierswater = | load = | clearance = | below = 41 feet (12 m) | life = | builder = | fabricator = | begin = | complete = | cost = | open = 1913 | inaugurated = | toll = | traffic = | preceded = | followed = | heritage = National Register of Historic Places, Seattle city landmark | collapsed = | closed = 1975 (to vehicles only) | replaces = | map_cue = | map_image = | map_alt = | map_text = | map_width = | coordinates = | lat = | long = | references = | extra ={{Designation list | embed = yes | designation1 = Seattle Landmark | designation1_date = January 17, 1977[1] | designation1_number =}} }} The 20th Avenue NE Bridge (also known as the Ravenna Park Bridge) is a three-hinged, steel, lattice-arched bridge that spans a ravine in Seattle's Ravenna Park. It was designed by Frank M. Johnson under the direction of city engineer Arthur Dimock.[2] Built in 1913, the structure is both listed in the National Register of Historic Places and is a designated city landmark.[2][3] The structure is {{convert|354|ft|abbr=on}} long. It has a {{convert|250|ft|adj=on|abbr=on}} arch that rises {{convert|41|ft|abbr=on}} over the ravine. It supports an {{convert|18|ft|adj=on|abbr=on}} reinforced concrete roadway. The road has been closed to vehicular traffic since 1975, but it is accessible by pedestrians.[4] References{{commons category|Ravenna Park Bridge}}1. ^{{cite web|title=Landmarks and Designation|publisher=City of Seattle|url=http://www.seattle.gov/neighborhoods/preservation/landmarks_listing.htm|accessdate=2013-03-05}} {{Bridges of Seattle}}2. ^{{cite book|title=National Register of Historic Places; Annual Listing of Historic Properties (Part II)|date=March 1, 1983|publisher=National Park Service|page=8669|url=http://www.cr.nps.gov/nr/listings/Weekly_List_FR-March-1-1983-listingyear1982.pdf}} 3. ^{{cite web|title=Individual Landmarks|url=http://www.seattle.gov/neighborhoods/preservation/t.htm|publisher=City of Seattle Department of Neighborhoods|accessdate=March 25, 2011|archive-url=https://web.archive.org/web/20100604232253/https://www.seattle.gov/neighborhoods/preservation/t.htm|archive-date=2010-06-04|dead-url=yes|df=}} 4. ^1 {{cite web|last=Long|first=Priscilla|title=Seattle's Ravenna Park Bridge is constructed in 1913.|url=http://www.historyink.org/index.cfm?DisplayPage=output.cfm&file_id=8699|work=HistoryLink.org Online Encyclopedia of Washington State History|date=July 23, 2008|accessdate=March 24, 2011|archive-url=https://web.archive.org/web/20111003055710/http://www.historyink.org/index.cfm?DisplayPage=output.cfm&file_id=8699|archive-date=2011-10-03|dead-url=yes|df=}} 11 : Bridges in Seattle|Bridges completed in 1913|Road bridges on the National Register of Historic Places in Washington (state)|National Register of Historic Places in Seattle|Landmarks in Seattle|Road bridges in Washington (state)|Pedestrian bridges in Washington (state)|Former road bridges in the United States|1913 establishments in Washington (state)|Open-spandrel deck arch bridges in the United States|Steel bridges in the United States |
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