Tyngsborough Bridge | |
|---|---|
 The arch bridge in Tyngsborough, Massachusetts, with the Temporary bridge alongside it in 2006 | |
| Coordinates | 42°40′34″N 71°25′17″W / 42.67605°N 71.42133°W |
| Crosses | Merrimack River |
| Locale | Tyngsborough, Massachusetts |
| Official name | Tyngsborough Bridge |
| Owner | Massachusetts Highway Department |
| Preceded by | Whipple Truss Bridge |
| Characteristics | |
| Design | Tied-arch bridge |
| Material | Steel |
| Total length | 656 feet (200 m) |
| Width | 41.5 feet (12.6 m) |
| Longest span | 547 feet (167 m) |
| No. of spans | 1 |
| Piers in water | 0 |
| Load limit | M 18 |
| History | |
| Designer | MassHighway in-house Design Unit |
| Constructed by | Simpson Bros. Corporation[1] Boston Bridge Works[2] |
| Opened | 1930 |
| Rebuilt | 1975 |
| Statistics | |
| Daily traffic | 22,300 (2007) |
| Location | |
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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]
- ^ Building and Engineering Trades Reference Book of Massachusetts and Rhode Island. Boston: F.W. Dodge. 1904. pp. 270–1. Retrieved 29 August 2017. Advertisement appears between pages 270 and 271.
- ^ Galer, Gregory Jay (1989). The Boston Bridge Works and the Evolution of Truss Building Technology. Brown University Press.
- ^ "Massachusetts Cultural Resource Information System". Massachusetts Department of Transport Highway Division. Retrieved 22 June 2015.
- ^ "National Bridges Entry". National Bridges. National Bridges. Retrieved 22 June 2015.
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