| 词条 | Tyngsborough Bridge |
| 释义 |
| name = Tyngsborough Bridge | native_name = | native_name_lang = | image = TyngsboroughBridge.jpg | image_upright = | alt = The arch bridge in Tyngsborough, Massachusetts, with the Temporary bridge alongside it in 2006 | caption = The arch bridge in Tyngsborough, Massachusetts, with the Temporary bridge alongside it in 2006 | coordinates = {{coord|42.67605|-71.42133|display=inline,title}} | os_grid_reference = | carries = | crosses = Merrimack River | locale = Tyngsborough, Massachusetts | official_name = Tyngsborough Bridge | other_name = | named_for = | owner = Massachusetts Highway Department | maint = | heritage = | id = | id_type = | website = | preceded = Whipple Truss Bridge | followed = | design = Tied-arch bridge | material = Steel | material1 = | material2 = | length = {{convert|656|ft|m}} | width = {{convert|41.5|ft|m}} | height = | depth = | traversable = | towpath = | mainspan = {{convert|547|ft|m}} | number_spans = 1 | piers_in_water = 0 | load = M 18 | clearance_above = | clearance_below = | life = | architect = | designer = MassHighway in-house Design Unit | contracted_designer = | winner = | engineering = | builder = Simpson Bros. Corporation[1] Boston Bridge Works[2] | fabricator = | begin = | complete = | cost = | open = 1930 | inaugurated = | rebuilt = 1975 | collapsed = | closed = | replaces = | traffic = 22,300 (2007) | toll = | map_type = USA Massachusetts | map_relief = | map_dot_label = | map_image = | map_size = | map_alt = | map_caption = }} The Tyngsborough Bridge is a steel tied-arch bridge located in Tyngsborough, Massachusetts and carries Route 113 over the Merrimack River. With a span of 547 feet, it has the longest span of any steel rib through arch bridges in Massachusetts. It is also the 2nd oldest steel rib through arch bridge in the state. The bridge is center hinged and features pratt-type trussing.[3][4] HistoryThe Tyngsborough Bridge was constructed in 1931 to replace the wooden Whipple truss bridge. The new bridge was sited alongside but not parallel to the older, starting close the old structure on the eastern side of the river but reaching the western side well both of the old bridge.[5] The Tyngsborough Bridge shares its open, braced rib design with the Boston University Bridge.[6] Starting in 1975 the bridge was rebuilt, but the cost of the construction generated controversy.[7] The bridge makes appearances in popular accounts of river voyages that recreate the nineteenth-century canoe trip of Henry Thoreau.[10][11] References1. ^{{cite book|date=1904|title=Building and Engineering Trades Reference Book of Massachusetts and Rhode Island|location=Boston |publisher= F.W. Dodge|pages=270–1|url=https://books.google.com/books?id=heECAAAAYAAJ&pg=PA270|accessdate=29 August 2017}} Advertisement appears between pages 270 and 271. 2. ^{{cite book| title= The Boston Bridge Works and the Evolution of Truss Building Technology | first= Gregory Jay | last = Galer | date= 1989 | publisher = Brown University Press}} 3. ^{{cite web|url=http://mhc-macris.net/Details.aspx?Mhcid=TYN.900 | title=Massachusetts Cultural Resource Information System |publisher=Massachusetts Department of Transport Highway Division|accessdate=22 June 2015}} 4. ^{{cite web|title=National Bridges Entry|url=http://nationalbridges.com/index.php?option=com_lqm&d5040cad4e1d7109e6a75831ceb950b5=1&task=showResults&query=8&lqm_id=271712&&format=raw&&Itemid=2 |website=National Bridges |publisher =National Bridges|accessdate=22 June 2015}} 5. ^{{cite book| pages=21–4 | title= Tyngsborough | first= Herbert | last = Morton | url = https://books.google.com/books?id=CIgx4LZKf9IC&pg=PA23& | accessdate = August 27, 2017}} 6. ^{{cite web| accessdate = August 28, 2017| website = Borough of Tyngsborough | title= About the Tyngsborough Bridge }} 7. ^{{cite news|title=Tyngsboro Voters Face One of the Largest Ballots in Recent History Tomorrow |url=https://www.newspapers.com/clip/2665302/tyngsboro_ballot/|newspaper=The Lowell Sun|date=May 10, 1976|page=36|via = Newspapers.com|accessdate = June 22, 2015 }} {{Open access}} 8. ^{{cite news|last1=Collins|first1=John|title=Tyngsboro Bridge is under repair|url=http://www.lowellsun.com/local/ci_12767526|accessdate=26 June 2015|work=The Lowell Sun|date=July 7, 2009}} 9. ^{{cite news|last1=Favot|first1=Sarah|title=547 feet never meant so much|url=http://www.lowellsun.com/ci_21515139/547-feet-never-meant-so-much|accessdate=26 June 2015|work=The Lowell Sun|date=September 11, 2012}} 10. ^{{cite book | url=https://books.google.com/books?id=yjAsSR-6DdwC&pg=PA130& | page= 130 | first = John | last = McPhee | accessdate = August 28, 2017 | title = Uncommon Carriers | publisher = Farrar, Straus and Giroux | date= 2006}} 11. ^{{cite book| title = Deep Travel: In Thoreau's Wake on the Concord and Merrimack|first =David K. |last=Leff | url = https://books.google.com/books?id=wCNjdXsJnrsC&pg=PA211& | page=211 | accessdate = August 28, 2017}}
External links
7 : Bridges in Middlesex County, Massachusetts|Bridges completed in 1930|Bridges over the Merrimack River|Steel bridges in the United States|Through arch bridges in the United States|Steel bridges in the United States|Road bridges in Massachusetts |
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