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  • International Database for Civil and Structural Engineering

Cornish-Windsor Bridge

General Information

Completion: 1866

Project Type

Structure: Town lattice truss bridge
Covered bridge
Function / usage: Road bridge
Material: Wooden bridge


Location: , , ,
, , ,
  • Connecticut River

Technical Information


width 7.32 m
total length 140.3 m
span lengths 62.18 m - 61.87 m


cost of construction United States dollar 9 000


truss wood



The American Society of Civil Engineers designates the bridge as a National Historic Civil Engineering Landmark.

2 July 1987

Closed to traffic.

8 December 1989

Reopened to traffic.


The bridge spans the Connecticut River to connect the towns of Cornish, New Hampshire and Windsor, Vermont. The western bank of the Connecticut River is considered to be the state line between the two states and therefore, the bridge is considered to be a New Hampshire bridge. The bridge is the longest wooden covered bridge in the United States as well as the longest two-span covered bridge existing in the world


Relevant Web Sites

Relevant Publications

  • Austin, Teresa Caring for a Covered Bridge. in Civil Engineering Magazine, v. 61, n. 7 (July 1991)
  • Dupré, Judith Les ponts., Könemann, Cologne (Germany), ISBN 3829004109; pp. 48-49
  • Dupré, Judith Bridges., Black Dog & Leventhal, New York (USA), ISBN 1884822754, 1997; pp. 48-49
  • Dupré, Judith Brücken., Könemann, Cologne (Germany), ISBN 3829004095, 1998; pp. 48-49
  • Jackson, Donald C. Great American Bridges and Dams., John Wiley & Sons, New York (USA), ISBN 0471143855, 1984; pp. 98
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