Editing Tobin Bridge (section)

{{short description|Bridge between Boston and Chelsea, Massachusetts}}
{{For|the bridge in California|Tobin Bridge (California)}}
{{redirect|Mystic River Bridge|the bridge in Mystic, Connecticut|Mystic River Bascule Bridge}}
{{Use American English|date=February 2025}}
{{Use mdy dates|date=September 2019}}
{{Infobox bridge
|bridge_name   = Tobin Bridge
|image         = Tobin bridge 2009f.JPG
|caption       = The Tobin Bridge viewed from East Boston in 2009
|image_size    = 300px
|official_name = Maurice J. Tobin Memorial Bridge
|carries       = 6 lanes (3 upper, 3 lower) of {{jct|state=MA|US|1}}
|crosses       = [[Mystic River]]
|locale        = [[Charlestown, Boston|Charlestown]]–[[Chelsea, Massachusetts|Chelsea]], Massachusetts
|maint         = [[Massachusetts Department of Transportation|MassDOT]]
|id            = 
|design        = 3-span double-deck [[cantilever]]ed [[truss bridge|truss]]
|mainspan      = {{convert|800|ft}}<ref name=structurae>{{Structurae|id=20009330|name=Tobin Memorial Bridge}}</ref>
|length        = {{convert|11906|ft}}<ref name=structurae />
|width         = {{convert|36|ft}}<ref name=structurae />
|height        = {{convert|254|ft}}
|clearance     = 
|below         = {{convert|135|ft}}<ref name=massport/>
|material      = [[steel]]<ref name=structurae />
|traffic       = 
|begin         = April 12, 1948<ref name=structurae /> 
|open          = February 27, 1950<ref name=structurae />
|closed        = 
|toll          = $2.50 ([[E-ZPass]]); $3.00 (pay-by-plate) (2023)
|coordinates   = {{coord|42.38483|-71.04755|display=inline,title}}
}}

The '''Maurice J. Tobin Memorial Bridge''' (formerly the '''Mystic River Bridge''') is a [[cantilever bridge|cantilever truss bridge]] that spans more than {{convert|2|mi|km|spell=in}} from [[Charlestown, Boston|Boston]] to [[Chelsea, Massachusetts|Chelsea]] over the [[Mystic River]] in [[Massachusetts]], United States.<ref name=abel/> The bridge is the largest in [[New England]].<ref name=abel>{{cite news |url=http://www.boston.com/news/local/articles/2007/10/23/work_never_stops_on_tobin_bridge/ |title=Work never stops on Tobin bridge: Costs rising as crews try to maintain old structure |first=David |last=Abel |newspaper=The Boston Globe |date=October 23, 2007}}</ref> It is operated by the [[Massachusetts Department of Transportation]] and carries [[U.S. Route 1]]. It was built between 1948 and 1950 and opened to traffic on February 2, 1950, replacing the former '''Chelsea Bridge'''. The {{convert|36|feet|adj=on}}-wide roadway has three lanes of traffic on each of the two levels with northbound traffic on the lower level and southbound traffic on the upper level.