Between This Date Or Unknown
1650
1700
1750
1800
1810
1820
1830
1840
1850
1860
1870
1880
1890
1900
1910
1920
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1940
1950
1960
1970
And This Date Or Unknown
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1750
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1900
1910
1920
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1950
1960
1970
Any Builder
A. G. Ryan and Sons of Evansville, Indiana
A. Guthrie and Company of St. Paul, Minnesota
A. H. Austin of Webster City, Iowa
A. Phelps and Sons
A. R. Morrison of Port Huron, Michigan
A. Tenniswood of Yale, Michigan
A. W. Kutche and Company
Alamo Construction Company of San Antonio
Albert Fink
Alex C. Bailey of Philipsburg, Pennsylvania
Alpine Excavating Company of St. Ignace, Michigan
Altoona Construction Corporation of Altoona, Pennsylvania
American Bridge Company of New York, New York
American Bridge Works, of Chicago, Illinois
Andrew Buchanan of Chambersburg, Pennsylvania
Andrew T. Barnes of Cass City, Michigan
Anthony Taylor
Anthracite Bridge Company
Ardelt Industries of Canada
Arthur R. Henry Inc.
Augustus J. Dupuis Company of Detroit, Michigan
B. H. Sargent of Grand Rapids, Michigan
B. M. French
Beighton and Spaulding of Pioneer, Ohio
Bellefontaine Bridge and Iron Company of Bellefontaine, Ohio
Berlin Construction Company of Berlin Connecticut
Berlin Iron Bridge Company of East Berlin, Connecticut
Bethlehem Steel Bridge Corporation of Steelton, Pennsylvania
Bethlehem Steel Company of Bethlehem, Pennsylvania
Board of Wayne County Road Commissioners
Booth and Flinn Company of Pittsburgh, Pennsylvania
Boston Bridge Works of Boston, Massachusetts
Brackett Construction Company of Cincinatti, Ohio
Brighton and Wing
Brookville Bridge Company of Brookville, Ohio
Buckeye Bridge Works of Cleveland, Ohio
Buckeye Portland Cement Company of Bellefontaine, Ohio
Bush, Robers, and Schaefer Company of New York, New York
Campbell and Lattimore of Toronto, Ontario
Canadian Bridge Company of Walkerville, Ontario
Canonie Construction Company of South Haven, Michigan
Canton Bridge Company of Canton, Ohio
Capitol Construction Company of Columbus, Ohio
Carl Goodwin and Sons of Allegan, Michigan
Central Bridge and Engineering Company of Peterborough, Ontario
Central Bridge Company of Tenton, Ontario
Central Concrete and Construction Company of Canton, Ohio
Central States Bridge Company of Indianapolis, Indiana
Champion Bridge Company of Wilmington, Ohio
Charles Borromeo Mattaini of Fergus, Ontario
Charles Chambers
Charles J. Rogers Construction Company
Charles M. Driver
Chester County Maintenance Forces
Chicago Bridge and Iron Works of Chicago, Illinois
Cleveland Bridge and Iron Company of Cleveland, Ohio
Clinton Bridge and Iron Works of Clinton, Iowa
Colonel John Choate
Columbia Bridge Works of Dayton, Ohio
Columbia Contracting Company of Pittsburgh, Pennsylvania
Columbus Bridge Company of Columbus, Ohio
Continental Bridge Company of Chicago and Peotone, Illinois
Continental Bridge Company of Philadelphia, Pennsylvania
Cook and Clark
Corcoran Construction Company of West Chester, Pennsylvania
Corrugated Metal Company of East Berlin, Connecticut (Berlin Iron Bridge Company of East Berlin, Connecticut)
Couse and Saunders of Detroit, Michigan
Cummings Structural Concrete Company of Pittsburgh, Pennsylvania
Curwensville Construction Company of Curwensville, Pennsylvania
D. E. O'Connell and Sons
D. H. Overman
D. H. Young of Manchester, Iowa
Daniel Deering Construction Company of Norwalk, Connecticut
Daniel O'Connells Sons of Holyoke, Massachusetts
Darin and Armstrong, Inc of Detroit, Michigan
David Graham of Minnesota
David L. Green of Muskegon, Michigan
David Shriver Jr.
Davidson and Doctor
Dean and Westbrook of New York, New York
Detroit Bridge and Iron Works of Detroit, Michigan
Dixon, Appleby and Thorne
Dominion Bridge Company of Montréal, Québec
Dominion Steel and Coal Corporation
Dravo Contracting Company of Pittsburgh, Pennsylvania
Dumond Contractors of Brentwood, Ontario
Dunleavy Brothers of Coatesville, Pennsylvania
Dyer Brothers
E. B. and B. F. Lippincott
E. C. Nolan and Son of Detroit, Michigan
E. J. Albrecht Company of Chicago, Illinois
E. J. Vander Veen
E. M. Wichert Company of Pittsburgh, Pennsylvania
E. W. Baldwin of St. Louis, Michigan
Eastern Bridge and Structural Company of Worcester, Massachusetts
Edward E. Bray Construction Company of Bridgeport, Connecticut
Edwards Sheet Metal Works of Frederickton, Ohio
Elkhart Bridge and Iron Company of Elkhart, Indiana
Empire Engineering
Eyre Construction Company of Philadelphia, Pennsylvania
F. Bicchieri and Brothers
F. H. Zeigler
Fargo Engineering Company of Kalamazoo, Michigan
Farris Bridge Company of Pittsburgh, Pennsylvania
Filbert, Porter, and Company
Fitch-Eva Company
Flinn-Moyer Company of Weatherford, Texas
Fort Pitt Bridge Works of Pittsburgh, Pennsylvania
Frank and Stiehl
Fred H. Price and Company
Fry and Cain
Fry and Cain / Walter Toebe Company
G. M. Rusling of Hackettstown, New Jersey
Gene Fewell
General Construction Company
George Bussell Company
George Dole of Wilmington, Delaware
George Stine
George W. Jackson of Chicago, Illinois
Getman Brothers
Gillette-Herzog Manufacturing Company of Minneapolis, Minnesota
Gradle Brothers of Indianapolis, Indiana
Groton Bridge Company of Groton, New York
H. E. Bunce
H. G. Christman Burke Company of Lansing, Michigan
H. L. Maddocks Company
H. W. Sebastian and Company of St. Louis, Missouri (St. Louis Bridge and Iron Works)
Hamilton Bridge Company of Hamilton, Ontario
Harris Structural Steel Company of New York, New York
Harry Ericksen of Manistique, Michigan
Henry Harman
Henry Lovatt of Wolverhampton, England
Herman Tapp Construction Company of Fort Wayne, Indiana
Hertel-Deyo Company
Hillding and Rabe
Hodson
Holdcroft Construction Company of Kingston, Ontario
Holloway Construction Company
Holloway Construction Company and Argersinger - Morse Construction Company
Holloway Construction Company and E. C. Nolan and Son of Detroit, Michigan
Holloway Construction Company and Jarvick Construction Company
Holloway Construction Company and Raff and Dexter of Lansing, Michigan
Hoose and Person Construction Company of Iron Mountain, Michigan
Hoover Construction Company of Philadelphia, Pennsylvania
Horseheads Bridge Company of Horseheads, New York
Illinois Bridge Company of Chicago, Illinois
Illinois Steel Bridge Company of Jacksonville, Illinois
Independent Bridge Company of Pittsburgh, Pennsylvania
Indiana Bridge Company of Muncie, Indiana
Iowa Bridge Company of Des Moines, Iowa
J. A. Morris
J. B. Whitcomb Construction Company of Detroit, Michigan
J. E. Jayne and Son of Iowa City, Iowa
J. G. Ratcliff of Waukon, Iowa
J. H. Baker and Sons of Port Huron, Michigan
J. H. Cofrode and Company of Philadelphia, Pennsylvania
J. Morehouse
James B. Diver Bridge Company of Keokuk, Iowa
James Clyde and James Elliot
James F. Powers
James House of Edgarton, Michigan
James Lloyd and Robert Wilson of Hagerstown, Maryland
James White
Jarvick Construction Company
John A. Roebling Sons Company of New York, New York
John A. Roeblings Sons Company of Trenton, New Jersey
John Denithorne and Sons of Phoenixville, Pennsylvania
John F. Casey Company of Pittsburgh, Pennsylvania
John Gill and Sons of Cleveland, Ohio
John Parker Corcoran Construction Company of West Chester, Pennsylvania
John T. Brubaker
John W. Hertel
Johnson-Greene Company
Joliet Bridge and Iron Company of Joliet, Illinois
Jones and Bunzendahl of Connersville, Indiana
Jones and Girouard of Ottawa, Ontario
Joseph A. Dice
Joseph Klein of Freeburg, Illinois
Joseph Leach Jr.
Joseph Mathews
Jules E. Roemheld Company
K. G. Marks
Kansas City Bridge Company of Kansas City, Missouri
Kelly-Atkinson Construction Company of Chicago, Illinois
Ketler-Elliott Company of Chicago, Illinois
Keystone Bridge Company of Pittsburgh, Pennsylvania
Keystone Contractors
King Bridge Company of Cleveland, Ohio
L. A. Davidson of Saginaw, Michigan
L. Smith, H. A. and M. C. Nichols of Hastings, Michigan
L. W. Edison and Company and Carl Goodwin and Sons of Allegan, Michigan
L. W. Lamb Company of Jackson, Michigan
Lackawanna Bridge Company of Buffalo, New York
Lafayette Bridge Company of Lafayette, Indiana
Lassig Bridge and Iron Works of Chicago, Illinois
Lomas Forge and Bridge Works of Cincinnati, Ohio
Loselle Construction Company
Lovering-Longbotham Company
Lyons-Wagner
M. Bennett and Sons
M. E. White Company of Chicago, Illinois
Mallory and Nash
Mariani Construction Company of New Haven, Connecticut
Marsh Engineering Company of Des Moines, Iowa
Massillon Bridge Company of Massillon, Ohio
Massillon Bridge Company of Massillon, Ohio, Darst and Hughes of Chicago, Illinois Agents
Massillon Bridge Company of Massillon, Ohio, Smith - Wynkoop and McGormley Agents
McClintic-Marshall Company of Pittsburgh, Pennsylvania
McMyler-Interstate Company of Cleveland, Ohio
Mead Brothers
Meads and Anderson
Meredith Construction Company
Michael J. McDermott and Company
Michelmann Steel Construction Company of Quincy, Illinois
Michigan Bridge Company of Portland, Michigan
Millard-Quigg Construction Company of Philadelphia, Pennsylvania
Miller and Whyte
Milliken Brothers of Brooklyn, New York
Milwaukee Bridge and Iron Works of Milwaukee, Wisconsin
Minneapolis Bridge Company of Minneapolis, Minnesota
Modern Construction Company of Fremont, Ohio
Mohawk and Hudson Iron Works of Waterford, New York (G.W. Eddy Foundry)
Morris Knauer
Morse Bridge Company of Youngstown, Ohio
Mortimer W. Smith
Moseley Iron Bridge and Roof Company of Boston, Massachusetts
Moses Shepherd
Mount Vernon Bridge Company of Mount Vernon, Ohio
Murray Dougal and Company of Milton, Pennsylvania
National Concrete
Nelson and Buchanan of Chambersburg, Pennsylvania
New Castle Bridge Company of New Castle, Indiana
New Columbus Bridge Company of Columbus, Ohio
New Haven Construction Company of New Haven, Connecticut
New Jersey Steel and Iron Company of Tenton, New Jersey
Northern Builders
Ohio Department of Highways, American Bridge Division
Oregonia Bridge Company of Lebanon, Ohio
Overland Construction Company
Owego Bridge Company of Owego, New York
Owen-Ames-Kimball Company
P. E. Lane of Chicago, Illinois
P. E. Mason Company of Sandusky, Michigan
P. I. Cox Construction Company
P. J. McCormick and Son of West Chester, Pennsylvania
P.J. Nickel Company of Ironwood, Michigan
Pan American Bridge Company of New Castle, Indiana
Paul Bacco Construction Company of Stamford, Connecticut
Paul Construction Company
Paul D. Kauffman of Reading, Pennsylvania
Paul Weinlander of Saline, Michigan
Peninsular Construction Company of Grand Rapids, Michigan
Penn Bridge Company of Beaver Falls, Pennsylvania
Pennsylvania Steel Company of Steelton, Pennsylvania
Phoenix Bridge Company of Phoenixville, Pennsylvania
Pierson Contracting Company and Owen-Ames-Kimball Company
Pierson Contracting Company and Raff and Dexter of Lansing, Michigan
Pittsburgh Bridge Company of Pittsburgh, Pennsylvania
Pittsburgh Bridge Company of Pittsburgh, Pennsylvania, Nelson and Buchanan of Chambersburg, Pennsylvania Agents
Price Brothers Company of Lansing, Michigan
Queen City Bridge Company of Cincinnati, Ohio
R. D. Wheaton Bridge Company of Chicago, Illinois
R. L. Ericson of Bessemer, Michigan
R. R. Brenner and Son of Kalamazoo, Michigan
R. T. Meredith
Randolph MacDonald Company of Toronto, Ontario
Reid-Riddell Engineering of Toronto, Ontario
Rieth-Riley Construction Company of Goshen, Indiana
Riverside Bridge Company of Martins Ferry, Ohio
Roanoke Iron and Bridge Works of Roanoke, Virginia
Roberts Supply Company of Lima, Ohio
Rodgers and Hagerty of New York, New York
Roemheld and Gallery
Russell-Townsend Company
Sarnia Bridge Company of Sarnia, Ontario
Sheesley and Janney
Smith Bridge Company of Toledo, Ohio
Squire Whipple Patent
Standard Steel Construction Company of Port Robinson, Ontario
Storms Contracting Company of Toronto, Ontario
Straits Construction Company
Stratford Bridge Company of Stratford, Ontario
Strobel Steel Construction Company of Chicago, Illinois
Stupp Brothers Bridge and Iron Company of St. Louis, Missouri
Super and Moulder
Taber Company
Thomas E. Currie
Thomas Gilkey
Toledo Bridge Company of Toledo, Ohio
Toledo-Massillon Bridge Company of Toledo, Ohio
Toledo-Massillon Bridge Company of Toledo, Ohio (W. Wylie)
Toledo-Massillon Bridge Company of Toledo, Ohio Wynkoop and McGormley, Agents
Tonawanda Engineering Corporation
Townsend-Shuttleworth-Ballmer Company of Lansing, Michigan
Trimpey and Whipkey
Tunnel City Bridge and Iron Works of Port Huron, MI
Unknown
Variety Ironworks of Cleveland, Ohio
Various Builders
Vincennes Bridge Company of Vincennes, Indiana
Virginia Bridge and Iron Company of Roanoke, Virginia
W. H. Harvie
W. H. Knapp Company of Monroe, Michigan
W. J. Storen Company
W. Marshall and Son of Galesburg, Michigan
W.McCarthy
Walsh Construction Company
Walter Toebe Company
Welden Brothers Construction Company of Iowa Falls, Iowa
Wendel Bollman of Baltimore, Maryland
West and Barden
Western Bridge Company of Vancouver, British Columbia
Western Bridge Works of Fort Wayne, Indiana
Whitaker and Diehl of Harrisburg, Pennsylvania
Whitehead and Kales Company of River Rouge, Michigan
Wiley-Maxon Construction Company of Dayton, Ohio
Will Dickinson of Ridgway, Pennsylvania
Willauer and Company
William F. Remppis Company of Reading, Pennsylvania
William Gross
Willits Brothers Construction Company of Bay City, Michigan
Wilson
Wisconsin Bridge and Iron Company of Milwaukee, Wisconsin
WM Cowin of Lambertville, Pennsylvania
Wolverine Engineering Company of Mason, Michigan
Woods and Golden
Wrought Iron Bridge Company of Canton, Ohio
York Bridge Company of York, Pennsylvania
Yost Brothers of Decatur, Indiana
Youngstown Bridge Company of Youngstown, Ohio
Any Engineer/Designer
A. B. Crealock
A. B. Sanderson and Company
A. Burton Cohen of New York, New York
A. L. Carruthers
Abraham Burton Cohen of New York, New York
Alfred Benesch and Associates of Chicago, Illinois
Allegheny County Department of Public Works
Arthur Engh
Asa Waters Grosvenor of Fort Wayne, Indiana
Ash, Howard, Needles, and Tammen of New York, New York
Bessemer and Lake Erie Railroad
Brooklyn Department of City Works
C. C. Parker and Associates
C. R. Dart
C.R. Hagey Engineering Associates of Fort Erie, Ontario
Caldwell and Drake Iron Works of Columbus, Indiana
Central States Bridge Company of Indianapolis, Indiana
Charles Ellis and Joseph Strauss
Charles F. Sanders
Chicago Bascule Bridge Company of Chicago, Illinois
City of Chicago
Clarence W. Hudson
D. H. Overman
Department of Railways and Canals
Detroit Bridge and Steel Works of River Rouge, Michigan
Dreibelbis and Company
Emil Swensson, of Mercantile Bridge Company
F. W. Adgate of Chicago, Illinois
Fay, Spofford, and Thorndike of Boston, Massachusetts
Ferris, Kaufman, and Company of Pittsburgh, Pennsylvania
Frank Barber of Toronto, Ontario
Frank H. Shaw of Lancaster, Pennstlvania
Frederick Blackburn Pelham
G. A. Flink
G. J. McLravy and Sons of Lansing, Michigan
George F. Swain
George L. Vose
George S. Richardson
George S. Webster
Gustav Lindenthal
H. C. Taylor
H. G. Balcom of New York, New York
Harold Hawley Corson
Harrington, Howard, and Ash
Harry K. Ellis
Hazelet and Erdal of Chicago, Illinois
Howard, Needles, Tammen and Bergendorff
Hugh E. Young of Chicago, Illinois
Indiana State Highway Commission
J. A. L. Waddell
J. A. Patterson
J. E. Greiner Company of Chicago, Illinois
James B. Long and W. C. Frey
John L. Stewart
John Lewis
John W. Storrs of Concord, New Hampshire
Joseph G. Henszey
Joseph Hobson
Karl A. Miller
Mark C. Krause of Duboistown, Pennsylvania
Max L. Wilder, Maine State Highway Commission
Melvin B. Stone of Minneapolis, Minnesota
Michigan State Highway Department
Modjeski and Masters
Nathan R. Rambo
Ohio State Highway Department
Onward Bates
Othmar Ammann
Pennsylvania State Highway Department
Philadelphia Department of Public Works
Philip Louis Pratley
Pittsburgh Department of Public Works
R.J. Teague and C. Ott
Ralph Modjeski
Richardson, Gordon, and Associates
Robinson and Steinman
Scherzer Rolling Lift Bridge Company of Chicago, Illinois
Sprague and Reppert of Pittsburgh, Pennsylvania
Steinman, Boynton, Gronquist and London of New York, New York
Strauss Bascule Bridge Company of Chicago, Illinois
T. J. Wilkerson of Beaver Falls, Pennsylvania
Theodor Rall
W. M. Hughes of Chicago, Illinois
Waddell and Hardesty
Waddell and Harrington
William H. Pratt