Franconia in Grafton County, New Hampshire — The American Northeast (New England)
1889 Iron Bridge
This wrought iron bridge is a rare surviving example of the pin-connected lenticular truss design used for iron bridges from 1880 to 1890. The Dow Bridge, a mile southeast of here on Main Street, is of the same rare design. It has been restored for modern use.
This bridge spanned the Ham Branch at the end of Delage Farm Road in Franconia from 1889 to 2001. It was built by the Berlin Bridge Company (Connecticut) to carry horse-drawn wagons over a narrow river to serve the Delage Farm.
This historic bridge was saved for viewing here through the cooperative efforts of the Franconia Board of Selectmen, the Conservation Commission, the Franconia Area Heritage Council, and the contractor David Presby.
Erected by Iron Furnace Interpretive Center and Franconia Area Heritage Council.
Topics. This historical marker is listed in these topic lists: Agriculture • Animals • Bridges & Viaducts • Industry & Commerce • Man-Made Features • Roads & Vehicles.
Location. Touch for map. Marker is in this post office area: Franconia NH 03580, United States of America. Touch for directions.
Other nearby markers. At least 8 other markers are within 5 miles of this marker, measured as the crow flies. Early Franconia (a few steps from this marker); Iron Furnace (a few steps from this marker); Stone Iron Furnace (a few steps from this marker); First Ski School in America (approx. ¾ mile away); Willowdale Settlement (approx. 4.4 miles away); Angel of the Mountains (approx. 4.7 miles away); Sinclair Lodge (approx. 4.7 miles away); Site of Sinclair Hotel (approx. 4.8 miles away). Touch for a list and map of all markers in Franconia.
Related markers. Click here for a list of markers that are related to this marker. Besaw Iron Furnace Interpretive Center
Also see . . .
1. Iron Furnace Bridge.
This link presents a detailed photographic description and analysis of all aspects of the 1889 bridge. Very thorough; many photographs. (Submitted on April 15, 2018, by Cosmos Mariner of Cape Canaveral, Florida.)
2. New Hampshire Metal Truss Bridges.
Metal truss bridges embody the early maturity of American civil engineering. Older wooden covered bridges were often built on the basis of intuition derived from experience. Metal trusses, by contrast, express engineers’ newfound ability to analyze the precise compressive or tensile stresses in a complex structure, and to design a bridge that would carry a specific load with a known factor of safety. (Submitted on April 15, 2018, by Cosmos Mariner of Cape Canaveral, Florida.)
Credits. This page was last revised on November 24, 2019. It was originally submitted on April 15, 2018, by Cosmos Mariner of Cape Canaveral, Florida. This page has been viewed 104 times since then and 10 times this year. Photos: 1, 2, 3, 4, 5, 6. submitted on April 15, 2018, by Cosmos Mariner of Cape Canaveral, Florida. • Bill Pfingsten was the editor who published this page.