| 词条 | Charles River Bridge (Commuter Rail) |
| 释义 |
|bridge_name = Charles River Bridge |image = Charles River Bridge from side with train 2013.JPG |alt = A truss bridge with a train passing over it |caption = Charles River Bridge with a train in 2013 |official_name = |carries = rail traffic over 4 tracks, split between the two bridges |crosses = Charles River |locale = Boston, Massachusetts |maint = |id = |designer = Keller & Harrington, Chicago[1] |design = single-leaf, through-truss, rolling bascule bridge |material = steel |spans = 1 |pierswater = 0 |mainspan = |length = {{convert|92|ft}} (±{{convert|5|ft}}) |width = |height = |load = |clearance = |below = |traffic = |begin = |complete = |open = 1931[1] |heritage = |collapsed = |preceded = |followed = |closed = |toll = |map_image = |map_alt = |map_width = |coordinates = {{coord|42.36898|-71.06529|type:landmark_scale:1000|display=title,inline}} |map_caption = {{Location map|USA Massachusetts |border = infobox |float = center |lat = 42.36898 |long = -71.06529 |width = 250 |caption = Location in Massachusetts }} }} The Charles River Bridge is a pair of railroad single-leaf, through-truss, rolling bascule bridges across the Charles River that connects North Station in Boston, Massachusetts to MBTA Commuter Rail lines in northern Massachusetts, United States. HistoryAlthough rail bridges across the Charles River near the present location of North Station have existed since the Boston and Lowell Railroad opened in 1835, the current bridges date from 1931, when the navigable channel of the Charles River was shifted 300 feet to the north of its former route to allow the platforms at North Station to be extended northwards.[1][2] The bridges were formerly connected to North Station by a wooden trestle; the trestle burned in January 1984, forcing all trains to terminate at a temporary station north of the river for 15 months.[2] Design and constructionThese bridges were designed by Keller & Harrington of Chicago, Illinois and built by the Phoenix Bridge Company of Phoenixville, Pennsylvania. Each bridge uses a {{convert|629|ST|adj=on}} over-head concrete counterweight. Originally, there were four bridges, but only two of them remain.[1] See also
References1. ^1 2 3 {{cite web |first = |last = |author = |authorlink = |coauthors = |title = Boston & Maine Railroad, Charles River Bridges, Charles River, North Station vicinity, Boston, Suffolk County, MA |url = https://www.loc.gov/pictures/item/ma1194/ |archiveurl = |work = |publisher = Historic American Buildings Survey/Historic American Engineering Record |location = Washington, DC |pages = 2–3 |language = |trans-title = |format = |doi = |year = 1984 |month = |archivedate = |accessdate = 2009-07-16 |quote = }} 2. ^1 {{cite book|title=Boston's Commuter Rail: The First 150 Years|author1=Humphrey, Thomas J.|author2=Clark, Norton D.|lastauthoramp=yes|publisher=Boston Street Railway Association|year=1985|isbn=9780685412947|pages=55, 57, 65–66}} External links
|structure = Crossings |place = Charles River |bridge = Charles River Bridge |bridge signs = MBTA Commuter Rail |upstream = Lechmere Viaduct |upstream signs = MBTA Green Line |downstream = Leverett Circle Connector Bridge |downstream signs = }}{{MBTA-stub}}{{Massachusetts-bridge-struct-stub}}{{US-rail-bridge-struct-stub}} 9 : MBTA Commuter Rail|Transportation in Cambridge, Massachusetts|Railroad bridges in Massachusetts|Truss bridges in the United States|Buildings and structures in Cambridge, Massachusetts|Bridges in Middlesex County, Massachusetts|Bridges over the Charles River|Steel bridges in the United States|Bascule bridges in the United States |
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