+Companies consolidated into American Bridge Company # Company name Headquarters 1 Keystone Bridge Company Pittsburgh, Pennsylvania 2 Wrought Iron Bridge Company Canton, Ohio 3 Berlin Iron Bridge Company Berlin, Connecticut 4 Pencoyd Iron Works Philadelphia, Pennsylvania 5 Union Bridge Company Athens, Pennsylvania 6 Groton Bridge Company Groton, New York 7 Pittsburgh Bridge Company Pittsburgh, Pennsylvania 8 Youngstown Bridge Company Youngstown, Ohio 9 Carnegie Company Pittsburgh, Pennsylvania 10 Post & McCord Brooklyn, New York 11 J.B. & J.M. Cornell Cornell, New York 12 Elmira Bridge Company, Limited Elmira, New York 13 American Bridge Works Chicago, Illinois 14 Edgemoor Bridge Works Edgemoor, Delaware 15 Lessig Bridge and Iron Works Chicago, Illinois 16 Shiffler Bridge Company Pittsburgh, Pennsylvania 17 Detroit Bridge and Iron Company Detroit, Michigan 18 Rochester Bridge and Iron Works Rochester, New York 19 J.G. Wagner and Co. Milwaukee, Wisconsin 20 Toledo Bridge Company Toledo, Ohio 21 Gilette & Herzog Manufactering Company Minneapolis, Minnesota 22 Lafayette Bridge Company Pittsburgh, Pennsylvania 23 Schultz Bridge and Iron Company Pittsburgh, Pennsylvania 24 Buffalo Bridge and Iron Works Buffalo, New York 25 Canton Bridge Company Canton, Ohio 26 Bellefonte Bridge and Iron Company Bellefonte, Pennsylvania 27 Coke and Iron Works St. Louis, Missouri 28 Hilton Bridge and Construction Company Albany, New York 29 Horseheads Bridge Company Horseheads, New York 30 Columbia Bridge Company, Successors to Columbia Bridge Works of Dayton, OH Pittsburgh, Pennsylvania
References [Author Unknown] (1899, September 15). "Trust Conference Work". The New York Times.