Boston Bridge Works (also known as Boston Bridge Works, Inc.) was a popular engineering firm, building bridges throughout New England, during the late nineteenth and early twentieth centuries. Operating out of Boston, they specialized in the drafting, design and implementation of both road and railway truss bridges, a popular bridge style of that period. Employees of the company were engineers and contractors for steel bridges, buildings, roofs, and railway turntables. The general offices, for most of their operating years, were at 47 Winter Street, Boston, with a plant in East Cambridge.