The Berlin Iron Bridge Company was a Berlin, Connecticut company that built iron bridges and buildings that were supported by iron. It is credited as the architect of numerous bridges and buildings now listed on the U.S. National Register of Historic Places. It eventually became part of the American Bridge Company. History The Berlin Iron Bridge Company began in 1868 as the Corrugated Metal Company, a branch of tinware firm Roys and Wilcox, which is now part of Roper Whitney. Originally producing roofing and shutters, the company became involved in roof trusses. In 1878, under Samuel C. Wilcox, the company purchased the rights to the "parabolic" (lenticular truss) bridge patent from William Douglas. Douglas became treasurer and executive manager of the company. In 1885 he received another patent, and the company name was changed to Berlin Iron Bridge Company. The Berlin Iron Bridge Company constructed hundreds of bridges across the eastern United States, until 1900, when the company was acquired by the American Bridge Company. Berlin Steel Almost immediately after its acquisition by the American Bridge Company, three executives from the Berlin Iron Bridge Company split from American Bridge and formed their own company, the Berlin Construction Company. The new company continued in the path of the Berlin Iron Bridge Company and continued building bridges until the 1930s. In 1962 it was renamed to the Berlin Steel Construction Company, and still exists today. Several of their bridges have also been listed on the National Register of Historic Places. Bridges Mattabesset River Bridge (c.1880s or 1890s), abandoned lenticular pony-truss in Connecticut spanning the Mattabesset River between Cromwell and Berlin Berlin Bridge (1880) over Webutuck Creek, a lenticular truss bridge manufactured in 1880 and shipped to the area for installation by local residents, NRHP-listed Bardwell's Ferry Bridge (1882), a lenticular truss bridge over the Deerfield River, Conway, Massachusetts, NRHP-listed Sheffield Street Bridge (1884), carries Sheffield Street over Hancock Brook in Waterbury, Connecticut, NRHP-listed Interlaken Mill Bridge (1885), Rhode Island, built 1885 spanning the Pawtuxet River, NRHP-listed Hadley Parabolic Bridge (1885), only survivor of only three iron semi-deck lenticular truss bridges to have been built (in New York State or in the world?), CR 1, Hadley, NY, NRHP-listed Interlaken Mill Bridge (1885), spanning the Pawtuxet River at Arkwright, Coventry, RI, NRHP-listed Golden Hill Bridge (c.1885), only known surviving bridge to implement modifications to the pony truss design patented by William O. Douglas in