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Douglas & Jarvis Patent Parabolic Truss Iron Bridge
U.S. National Register of Historic Places
Location	Mill Hill Rd., Highgate, Vermont
Coordinates	44°56′3″N 73°2′53″W / 44.93417°N 73.04806°W / 44.93417; -73.04806
Area	less than one acre
Built	1887 (1887)
Built by	The Berlin Iron Bridge Company; Douglas & Jarvis
Architectural style	Parabolic Truss Iron
NRHP reference No.	74000213
Added to NRHP	March 21, 1974

The Douglas & Jarvis Patent Parabolic Truss Iron Bridge is a historic bridge across the Missisquoi River in Highgate, Vermont. Located at the end of Mill Hill Road, it is at 215 feet (66 m) one of the longest bridges of its type in the northeastern United States. It was built in 1887, and was listed on the National Register of Historic Places in 1974.

Description and history

The Douglas & Jarvis Patent Parabolic Truss Iron Bridge stands south of Highgate Falls village, at the end of Mill Hill Road, where it formerly crossed the Missisquoi River to meet Highgate Road (Vermont Route 207). The bridge is oriented east-west across the river, just downstream (north of) the dam at Highgate Falls, and is open to pedestrian use. It is 215 feet (66 m) long and is set on stone abutments. It is of a parabolic or lenticular truss design, with a secondary lenticular pony truss span at its southern end. The main trusses are supported by iron I-beam portal posts topped by decorative finials, and are joined to each other by a web of overhead iron rods.

The bridge was built in 1887 by the Berlin Iron Bridge Company of Berlin, Connecticut, which held rights to the Douglas and Jarvis patent for the lenticular truss design. The bridge was one of the first to be built in the state with state-assisted local funding, and is one of the largest surviving lenticular truss bridges in the northeastern United States. The company built many instances of this design in the late 19th century, but gradually phased out its use in the early 20th century.

See also

• Transport portal
• Engineering portal
• National Register of Historic Places listings in Franklin County, Vermont
• National Register of Historic Places listings in Vermont

References

1. ^ "National Register Information System". National Register of Historic Places. National Park Service. July 9, 2010.
2. ^ Chester Liebs (1974). "NRHP nomination for Douglas & Jarvis Patent Parabolic Truss Iron Bridge". National Park Service. Retrieved 2016-10-21. with photos from 1972

v t e National Register of Historic Places in Franklin County, Vermont
Districts	Ballard Farm Central Vermont Railroad Headquarters Downtown Richford Historic District St. Albans Historic District
Buildings	Billado Block Sheldon Boright House Brigham Academy Community Baptist Church and Parsonage District No. 2 School District No. 8 School Enosburg Congregational Memorial Church Enosburg Opera House Evarts-McWilliams House Fairfield Street School First Congregational Church of Swanton Fletcher Union Church Georgia Plain Baptist Church Giroux Furniture Company Building Solomon Goodrich Homestead Hathaway's Tavern Houghton House Kemp-Shepard House Dr. B. J. Kendall Company L'Ecole Saintes-Anges Methodist Episcopal Church Montgomery House Ovitt Grist Mill Parish of the Holy Trinity Perley Block Moses P. Perley House Quincy Hotel Richford Primary School Richwood Estate Rockledge St. Albans Town Hall St. Ann's Episcopal Church St. Bartholomew's Episcopal Church St. George's Catholic Church St. John's Episcopal Church Swanton School Sweat-Comings Company House U.S. Inspection Station-East Richford, Vermont U.S. Inspection Station-Richford, Vermont U.S. Inspection Station-West Berkshire, Vermont United States Post Office and Custom House Warner Home West Berkshire School F.W. Wheeler House Willard Manufacturing Company Building
Structures	Bridge 9 Bridge 12 Bridge Number VT105-10 Comstock Covered Bridge Douglas & Jarvis Patent Parabolic Truss Iron Bridge East Fairfield Covered Bridge Fairfax Covered Bridge Fuller Covered Bridge Hectorville Covered Bridge Hopkins Covered Bridge Hutchins Covered Bridge Longley Covered Bridge Missisquoi River Bridge Swanton Covered Railroad Bridge West Hill Covered Bridge
See also: National Register of Historic Places listings in Franklin County, Vermont and List of National Historic Landmarks in Vermont

• Bridges on the National Register of Historic Places in Vermont
• National Register of Historic Places in Franklin County, Vermont
• Bridges completed in 1887
• Bridges in Franklin County, Vermont
• Buildings and structures in Highgate, Vermont
• Pedestrian bridges in Vermont
• Truss bridges in the United States
• Iron bridges in the United States
• 1887 establishments in Vermont