Between This Date Or Unknown
1650
1700
1750
1800
1810
1820
1830
1840
1850
1860
1870
1880
1890
1900
1910
1920
1930
1940
1950
1960
1970
And This Date Or Unknown
1650
1700
1750
1800
1810
1820
1830
1840
1850
1860
1870
1880
1890
1900
1910
1920
1930
1940
1950
1960
1970
Any Builder
A. Bentley and Sons of Toledo, Ohio
A. D. Briggs of Springfield, Massachusetts
A. G. Ryan and Sons of Evansville, Indiana
A. Guthrie and Company of St. Paul, Minnesota
A. H. Austin of Webster City, Iowa
A. H. Proksch of Iron River, Michigan
A. Oscar Martin
A. Phelps and Sons
A. R. Morrison of Port Huron, Michigan
A. S. Decker of Flint, Michigan
A. Tenniswood of Yale, Michigan
A. W. Kutche and Company
Alamo Construction Company of San Antonio
Albert and Frank Harman
Albert Fink
Aldrich and Cook and Jerome Wilhelm
Alex C. Bailey of Philipsburg, Pennsylvania
Algoma Steel Bridge Company of Winnipeg, Manitoba
Allen, McEvoy and Company of Beloit, Wisconsin
Alpine Excavating Company of St. Ignace, Michigan
Altoona Construction Corporation of Altoona, Pennsylvania
American Bridge Company of New York, New York
American Bridge Company of New York, New York, United Construction Company of Albany, New York Contractors
American Bridge Works, of Chicago, Illinois
Anderson and Company of Chicago, Illinois
Andrew Buchanan of Chambersburg, Pennsylvania
Andrew Kloman
Andrew T. Barnes of Cass City, Michigan
Anthony Taylor
Anthracite Bridge Company
Ardelt Industries of Canada
Arthur R. Henry Inc.
Attica Bridge Company of Attica, Indiana
Austin Bridge Company of Dallas, Texas
B. A. Sheeler
B. C. Lord of Clayton, Michigan
B. H. Sargent of Grand Rapids, Michigan
Barrett and Hilp of San Francisco, California
Bates and Rogers of Chicago, Illinois
Beckel Iron Foundry and Machine Shop of Bethlehem, Pennsylvania
Beighton and Spaulding of Pioneer, Ohio
Bell-Bockel Company of Altoona, Pennsylvania
Bellefontaine Bridge and Iron Company of Bellefontaine, Ohio
Bender Construction Company
Berlin Construction Company of Berlin Connecticut
Berlin Iron Bridge Company of East Berlin, Connecticut
Berlin Iron Bridge Company of East Berlin, Connecticut and Groton Bridge Company of Groton, New York
Bethlehem Steel Bridge Corporation of Steelton, Pennsylvania
Bethlehem Steel Company of Bethlehem, Pennsylvania
Bishop and Weir of Detroit, Michigan
Board of Wayne County Road Commissioners
Bontrager Construction Company
Booth and Flinn Company of Pittsburgh, Pennsylvania
Boston Bridge Works of Boston, Massachusetts
Brackett Construction Company of Cincinatti, Ohio
Brenaman Corporation
Brighton and Wing
Brookville Bridge Company of Brookville, Ohio
Brown Brothers of Lansing, Michigan
Buckeye Bridge Works of Cleveland, Ohio
Buckeye Portland Cement Company of Bellefontaine, Ohio
Bush, Robers, and Schaefer Company of New York, New York
C. A. Handeyside Construction Company
C. B. and M. R. Taylor
C. E. Almond
C. E. Cotton
C. Fiske Campbell
C. G. Bridges
C. J. Nystedt
Cambria Iron Works of Johnstown, Pennsylvania
Campbell and Lattimore of Toronto, Ontario
Canadian Bridge Company of Walkerville, Ontario
Canadian Vickers Limited of Montreal, Quebec
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
Carnegie Steel Company of Pittsburgh, Pennsylvania
Carrothers and Crouch of Kansas City, Kansas
Central Bridge and Engineering Company of Peterborough, Ontario
Central Bridge Company of Tenton, Ontario
Central Concrete and Construction Company of Canton, Ohio
Central Construction Company
Central States Bridge Company of Indianapolis, Indiana
Champion Bridge Company of Wilmington, Ohio
Champion Iron Company of Kenton, Ohio
Charles Borromeo Mattaini of Fergus, Ontario
Charles Chambers
Charles E. Walton of Pottsville, Pennsylvania
Charles Ellet
Charles J. Rogers Construction Company
Charles M. Driver
Chermus Construction Company
Chester County Maintenance Forces
Chicago Bridge and Iron Works of Chicago, Illinois
Civilian Conservation Corps
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
Concrete Steel Bridge Company of Clarksburg, West Virginia
Consolidated Steel Company of Los Angeles, California
Consolidated Western Steel Corporation of Los Angeles, California
Continental Bridge Company of Chicago and Peotone, Illinois
Continental Bridge Company of Philadelphia, Pennsylvania
Cook and Clark
Corbet Foundry and Machine Company of Owen Sound, Ontario
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
Crossan Construction Company of Philadelphia and Brownsville, Pennsylvania
Cummings Structural Concrete Company of Pittsburgh, Pennsylvania
Curwensville Construction Company of Curwensville, Pennsylvania
D. B. Hoover
D. E. O'Connell and Sons
D. H. Overman
D. H. Young of Manchester, Iowa
D. T. Frank
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
Dean Construction Company
Decatur Bridge Company of Decatur, Illinois
Delta Contracting Company of Escanaba, Michigan
Denton and Johnson of Saginaw, Michigan
Detroit Bridge and Iron Works of Detroit, Michigan
Detroit Bridge and Iron Works of Detroit, Michigan and King Bridge Company of Cleveland, Ohio (Repairs)
Dickson Bridge Works Company of Campbellford, Ontario
Dixon, Appleby and Thorne
Dominion Bridge Company of Montréal, Québec
Dominion Bridge Company of Vancouver, British Columbia
Dominion Construction Company
Dominion Steel and Coal Corporation
Donald L. McDowell
Dover Boiler Works of Dover, New Jersey
Drake and Stratton of Philadelphia, Pennsylvania and H. S. Kerbaugh of Philadelphia, Pennsylvania
Dravo Contracting Company of Pittsburgh, Pennsylvania
Dumond Contractors of Brentwood, Ontario
Duncan Construction Company of Marlinton, West Virginia
Dunleavy Brothers of Coatesville, Pennsylvania
Dyer Brothers
E. B. and B. F. Lippincott
E. C. Nolan and Son of Detroit, Michigan
E. H. Shuttleworth
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
Eaton and Smith
Edge Moor Bridge Works of Wilmington, Delaware
Edge Moor Bridge Works of Wilmington, Delaware and King Bridge Company of Cleveland, Ohio
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
Engels Steel Construction Company of Alabama
Erickson Trucking Service Company
Eyre Construction Company of Philadelphia, Pennsylvania
F. Bicchieri and Brothers
F. C. Amoroso and Sons of San Francisco, California
F. C. Atletwed
F. H. Zeigler
F. M. Williams Construction Company of Winamac, Indiana
F. W. Whitehead
F. Yeager Bridge and Culvert Works of Port Huron, Michigan
Fargo Engineering Company of Kalamazoo, Michigan
Farris Bridge Company of Pittsburgh, Pennsylvania
Ferguson Construction of Rockford, Illinois
Ferro-Concrete Construction Company of Harrisburg, Pennsylvania
Filbert, Porter, and Company
Fitch-Eva Company
Flickwir and Bush of New York, New York
Flinn-Moyer Company of Weatherford, Texas
Fogleman and Davidson
Fort Pitt Bridge Works of Pittsburgh, Pennsylvania
Frank and Stiehl
Fred H. Price and Company
Frederick Snare Construction Corporation of New York, New York
Freeland McHale and PA
Fry and Cain
Fry and Cain / Walter Toebe Company
Fry Construction Company
G. A. and F.M. Wagman Company of York, Pennsylvania
G. E. Warden Company of Eau Claire, Wisconsin
G. M. Rusling of Hackettstown, New Jersey
G. T. Richards
Gehret Brothers of Bridgeport, Pennsylvania
Gene Fewell
General Asphalt Paving Company
General Construction Company
Genesee Bridge Company of Rochester, New York
George Bussell Company
George Dole of Wilmington, Delaware
George Stine
George W. Condon of Omaha, Nebraska
George W. Drew
George W. Jackson of Chicago, Illinois
Getman Brothers
Gilbert and Smith of Gettysburg, Pennsylvania
Gillette-Herzog Manufacturing Company of Minneapolis, Minnesota
Gilliland Construction Company
Good Roads Machinery Company of Marathon, New York
Gosner and Company
Gosner and Flynn of Dearborn, Michigan
Gradle Brothers of Indianapolis, Indiana
Gray Brothers Artificial Stone Paving Company of San Francisco, California
Great Lakes Dredge and Dock Company of Chicago, Illinois
Groton Bridge Company of Groton, New York
Guy Trimpey
H. E. Bunce
H. G. Christman Burke Company of Lansing, Michigan
H. Geary and C. F. Murray
H. H. Stoddard Company
H. L. Maddocks Company
H. Stewart
H. T. Osburn and Company
H. W. Sebastian and Company of St. Louis, Missouri (St. Louis Bridge and Iron Works)
Haller and Davis
Hamilton Bridge Company of Hamilton, Ontario
Harris Structural Steel Company of New York, New York
Harry Ericksen of Manistique, Michigan
Hartman and Clark Brothers
Havana Bridge Works of Montour Falls, New York
Hawkes, Crayshay and Company of Gateshead, England
Hedges Construction Company
Hennepin Bridge Company of Minneapolis, Minnesota
Henry B. Rust
Henry Harman
Henry Lovatt of Wolverhampton, England
Herman Tapp Construction Company of Fort Wayne, Indiana
Hertel and Vander Veen
Hertel-Deyo Company
Hill and Belknap
Hillding and Rabe
Hillding Construction Company
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
Horace E. Horton of Minneapolis, Minnesota
Horseheads Bridge Company of Horseheads, New York
I. E. Smith of Richmond, Indiana
Illinois Bridge Company of Chicago, Illinois
Illinois Steel Bridge Company of Jacksonville, Illinois
Independent Bridge Company of Pittsburgh, Pennsylvania
Indiana Bridge Company of Indianapolis, Indiana
Indiana Bridge Company of Muncie, Indiana
Indianapolis Bridge Company of Indianapolis, Indiana
Industrial Construction Company
International Engineering and Construction Company Limited of Braine-le-Comte, Belgium
Interstate Building Company
Iowa Bridge Company of Des Moines, Iowa
Ira J. Reighter Construction Company
J. A. Morris
J. B. Jewell
J. B. Whitcomb Construction Company of Detroit, Michigan
J. D. Hutchinson of Troy, New York
J. E. Jayne and Son of Iowa City, Iowa
J. E. Mason
J. G. Ratcliff of Waukon, Iowa
J. H. Baker and Sons of Port Huron, Michigan
J. H. Cofrode and Company of Philadelphia, Pennsylvania
J. H. Wickersham
J. Lee Plumer
J. Morehouse
J. W. Mathews and Company
J. W. Scott of Flemington, New Jersey
J.M. Hickman Company
Jack Lemon
Jackson Construction Company
Jaicks Brothers of River Forest, Illinois
James B. Diver Bridge Company of Keokuk, Iowa
James Brooke
James Clyde and James Elliot
James F. Powers
James House of Edgarton, Michigan
James Lloyd and Robert Wilson of Hagerstown, Maryland
James M. Smith
James McGraw Company of Philadelphia, Pennsylvania
James W. Craig
James White
James William LeGore
Jarvick Construction Company
Jenkins and Anderson
Jenkins and Elton of Sacramento, California
Jenks-Dresser Company of Sarnia, Ontario
John A. Roebling Sons Company of New York, New York
John A. Roeblings Sons Company of Trenton, New Jersey
John Decker of Rogers City, Michigan
John Denithorne and Sons of Phoenixville, Pennsylvania
John F. Casey Company of Pittsburgh, Pennsylvania
John Gill and Sons of Cleveland, Ohio
John H. Sparks of St. Joseph, Missouri
John J. Gallery
John L. Foreman
John Parker Corcoran Construction Company of West Chester, Pennsylvania
John R. Edelman Company
John S. Wells
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
Judson Pacific Murphy Company
Judson Pacific Murphy-Kiewit
Jules E. Roemheld Company
Jutton-Kelly Company of Detroit, Michigan
K. G. Marks
Kansas City Bridge Company of Kansas City, Missouri
Kelly-Atkinson Construction Company of Chicago, Illinois
Ketler-Elliott Company of Chicago, Illinois
Keweenaw County Road Commission
Keystone Bridge Company of Pittsburgh, Pennsylvania
Keystone Contractors
King Bridge Company of Cleveland, Ohio
Koss Construction Company of Des Moines, Iowa
Kuert Contracting Company of Indianapolis, Indiana
L. A. Davidson of Saginaw, Michigan
L. A. Davidson of Saginaw, Michigan (Widening)
L. G. Garrison
L. H. Focht and Son
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. Edison Company
L. W. Edison Company and Own-Ames-Kimball Company
L. W. Lamb Company of Jackson, Michigan
Lackawanna Bridge Company of Buffalo, New York
Lackawanna Steel Construction Corporation of Buffalo, New York
Lafayette Bridge Company of Lafayette, Indiana
Lafayette Engineering Company of Lafayette, Indiana
Lambertville Iron Works of Lambertville, New Jersey
Langton and Bartho of Toronto, Ontario
Larkin and Sangster of Seneca Falls, New York
Lassig Bridge and Iron Works of Chicago, Illinois
Leamon and Evans of Atlanta, Georgia
Lomas Forge and Bridge Works of Cincinnati, Ohio
Lord and Bishop
Loselle Construction Company
Louis Caravaglia
Louis J. Bacco Construction Company of Stamford, Connecticut
Lovering-Longbotham Company
Luten Bridge Company of York, Pennsylvania
Lyons Construction Company
Lyons-Wagner
M. A. Gammino Construction Company of Providence, Rhode Island
M. B. C. (Unknown Initials)
M. Bennett and Sons
M. E. White Company of Chicago, Illinois
M. Rorabaugh of Mountville, Pennsylvania
Mac Donald and Kahn of Los Angeles, California
Macomb County Road Commission
Mallory and Nash
Manistique Pulp and Paper Company of Manistique, Michigan
Mariani Construction Company of New Haven, Connecticut
Marsh Engineering Company of Des Moines, Iowa
Marshall Campbell of Port Huron, Michigan
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
Massman Construction Company of Kansas City, Missouri
McClintic-Marshall Company of Pittsburgh, Pennsylvania
McDiarmid Company of Winnipeg, Manitoba
McDowell Wellman of Cleveland, Ohio
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 and Pipe Company of Lansing, Michigan
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
Minns Brothers
Mississippi Valley Structural Steel Company
Missouri Valley Bridge and Iron Company of Leavenworth, Kansas
Modern Construction Company of Fremont, Ohio
Mohawk and Hudson Iron Works of Waterford, New York (G.W. Eddy Foundry)
Moore and Moore
Moore Dry Dock Company of Oakland, California
Morris Handler Company
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
Mumaw and Briege
Murray Dougal and Company of Milton, Pennsylvania
N. M. Stark of Des Moines, Iowa
National Bridge Company of Boston, Massachusetts
National Concrete
Nelson and Buchanan of Chambersburg, Pennsylvania
Nelson Construction Company of Chambersburg, Pennsylvania
New Castle Bridge Company of New Castle, Indiana
New Columbus Bridge Company of Columbus, Ohio
New England Structural Company of East Everett, Massachusetts
New Haven Construction Company of New Haven, Connecticut
New Jersey Bridge Company of Manasquan, New Jersy
New Jersey Steel and Iron Company of Tenton, New Jersey
New York Central Iron Works of Hagerstown, Maryland
Newman and Armstrong Engineers
Northern Bridge Company
Northern Builders
Northwestern Bridge and Iron Company of Milwaukee, Wisconsin
Nystedt and Isham
O.L. Hicks of Humber Bay, Ontario
Ohio Steel Erection Company
Ontario Bridge Company of Toronto, Ontario
Oregonia Bridge Company of Lebanon, Ohio
Ortale Construction Company
Ottumwa Supply and Construction Company of Ottumwa, Iowa
Overland Construction Company of Chicago, Illinois
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. N. Massie of Bessemer, Michigan
P.J. Nickel Company of Ironwood, Michigan
Pan American Bridge Company of New Castle, Indiana
Parmalee and Carpenter
Passaic Rolling Mill Company of Paterson, New Jersey
Paul Bacco Construction Company of Stamford, Connecticut
Paul Construction Company
Paul D. Kauffman of Reading, Pennsylvania
Paul Weinlander of Saline, Michigan
Pencoyd Iron Works of Pencoyd, Pennsylvania
Pencoyd Iron Works of Pencoyd, Pennsylvania, A and P Roberts, Agents
Peninsular Construction Company of Grand Rapids, Michigan
Penn Bridge Company of Beaver Falls, Pennsylvania
Pennsylvania Steel Company of Steelton, Pennsylvania
Perkins Bridge and Supply Company
Peter Brill
Peter Mitchell Construction Company of Greenwich, Connecticut
Philadelphia Bridge Works of Philadelphia, 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 - Des Moines Steel Company
Pittsburgh Bridge Company of Pittsburgh, Pennsylvania
Pittsburgh Bridge Company of Pittsburgh, Pennsylvania, Nelson and Buchanan of Chambersburg, Pennsylvania Agents
Port Arthur Construction Company
Possibly Dean and Westbrook of New York, New York
Powell and Mitchell of Marquette, Michigan
Price Brothers Company of Lansing, Michigan
Proksch Construction Company
Queen City Bridge Company of Cincinnati, Ohio
R. C. Burket
R. D. Wheaton Bridge Company of Chicago, Illinois
R. L. Ericson of Bessemer, Michigan
R. R. Brenner and Son of Kalamazoo, Michigan
R. S. McMannus Steel Construction Company of Buffalo, New York
R. T. Meredith
R.D. Wheaton Bridge Company of Chicago, Illinois
Raff and Dexter of Lansing, Michigan
Randolph MacDonald Company of Toronto, Ontario
Reid-Riddell Engineering of Toronto, Ontario
Richard Adler
Richard Delafield, U.S. Army Corp of Engineers
Richard F. Hawkins Ironworks of Springfield, Massachusetts
Rieth-Riley Construction Company of Goshen, Indiana
Riverside Bridge Company of Martins Ferry, Ohio
Roanoke Iron and Bridge Works of Roanoke, Virginia
Robert Mowbray of Whitechurch, Ontario
Roberts Paving Company
Roberts Supply Company of Lima, Ohio
Rocca and Caletti of San Rafael, California
Rochester Bridge and Construction Company
Rochester Bridge and Construction Company of Rochester, New York
Rochester Bridge Company of Rochester, Indiana
Rodgers and Hagerty of New York, New York
Roemheld and Gallery
Ross and Williams of Beaverton, Michigan
Ruckman-Hansen, Inc. of Fort Wayne, Indiana
Russell-Townsend Company
Ryan-Parker Construction Company of New York, New York
Samuel Mills of Escanaba, Michigan
Samuel P. White of Beaver Falls, Pennsylvania
Sanders Contracting Company of Portland, Maine
Sarnia Bridge Company of Sarnia, Ontario
Schuylkill Bridge Company of Phoenixville, Pennsylvania
Schuylkill Construction Company
Scribner and Heyworth
Sharpsville Steam Boiler Works of Sharpsville, Pennsylvania
Sheesley and Janney
Silas Harry of Chambersburg, Pennsylvania
Simon DeGraff of Syracuse, New York
Simon Dreibelbies
Smith and Nichols of Hastings, Michigan
Smith Bridge Company of Toledo, Ohio
Smith, Latrobe, and Company of Baltimore, Maryland
Smith-Byers-Sparks Company of Houghton, Michigan
Smith-Holmes-Burridge-Sparks of Houghton, Michigan
Squire Whipple Patent
St. Lawrence Bridge Company of Montréal, Québec
Standard Engineering and Contracting Company
Standard Engineering Company of Toledo, Ohio
Standard Steel Construction Company of Port Robinson, Ontario
Stine and Pollock
Storms Contracting Company of Toronto, Ontario
Straits Construction Company
Stratford Bridge Company of Stratford, Ontario
Strobel Steel Construction Company of Chicago, Illinois
Strom Construction Company
Stupp Brothers Bridge and Iron Company of St. Louis, Missouri
Sugden and Sivier
Super and Moulder
Superior Concrete Construction Company
Swanger-Fackler Construction Company
T. J. Foley
Taber Company
Theodore Seaman
Thomas B. Russell of Hayward, California
Thomas E. Currie
Thomas E. Hill
Thomas J. Kennedy
Thomas McAdams
Thomas Welch
Tibbitts-Pacific Company of San Francisco, California
Toledo Bridge and Crane Company of Toledo, Ohio
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
Union Bridge Company of Athens, Pennsylvania
United Construction Company of Albany, New York
Unknown
Varcoe and Boyd
Vare Construction Company
Variety Ironworks of Cleveland, Ohio
Various Builders
Victor C. Minteer of New Wilmington, Pennsylvania
Vincennes Bridge Company of Vincennes, Indiana
Virginia Bridge and Iron Company of Roanoke, Virginia
W. B. Rogers
W. H. Harvie
W. H. Harvie and J. H. Frisinger
W. H. Knapp Company of Monroe, Michigan
W. J. Anschutz of Saginaw, Michigan
W. J. Storen Company
W. L. Eva
W. L. Proctor of Santa Rosa, California
W. Marshall and Son of Galesburg, Michigan
W. Marshall and Sons of Grand Rapids, Michigan
W. N. Concanon Company of San Francisco, California
W.McCarthy
Waddell and Harrington
Wadel Construction Company
Walbridge and Aldinger Company
Walker Brothers of Charleston, West Virginia
Walsh Construction Company
Walter Toebe Company
Walter Willets
Watson Manufacturing Company of Paterson, New Jersey
Wausau Iron Works of Wausau, Wisconsin
Welden Brothers Construction Company of Iowa Falls, Iowa
Wendel Bollman of Baltimore, Maryland
West and Barden
Western Bridge and Steel Fabricators Limited of Vancouver, British Columbia
Western Bridge Company of Vancouver, British Columbia
Western Bridge Works of Fort Wayne, Indiana
Wetzel Engineering Company of New Martinsville, West Virginia
Whitaker and Diehl of Harrisburg, Pennsylvania
Whitehead and Kales Company of River Rouge, Michigan
Whitney Brothers
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
Wilson Brothers of Geneva, Illinois
Wisconsin Bridge and Iron Company of Milwaukee, Wisconsin
WM Cowin of Lambertville, Pennsylvania
Wolverine Engineering Company of Mason, Michigan
Woods and Golden
Worden-Allen Company of Milwaukee, Wisconsin
Wrought Iron Bridge Company of Canton, Ohio
Wynkoop and McGormley of Toledo, Ohio
York Bridge Company of York, Pennsylvania
Yost Brothers of Decatur, Indiana
Youngstown Bridge Company of Youngstown, Ohio
Yuba Consolidated Industries
Any Engineer/Designer
A. B. Crealock
A. B. Sanderson and Company
A. Burton Cohen of New York, New York
A. L. Carruthers
A. P. Dise
Abraham Burton Cohen of New York, New York
Albert Lucius of New York, New York
Alfred Benesch and Associates of Chicago, Illinois
Alfred W. Eichler
Allegheny County Department of Public Works
Arthur Engh
Arthur Page Brown
Asa Waters Grosvenor of Fort Wayne, Indiana
Ash, Howard, Needles, and Tammen of New York, New York
B. M. French
Barber and Young of Toronto, Ontario
Benjamin Herman Davis
Bennett, Parsons, and Frost of Chicago, Illinois
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
CBA Engineering
Central States Bridge Company of Indianapolis, Indiana
Charles C. Schneider
Charles Ellis and Joseph Strauss
Charles F. Sanders
Charles Henry Purcell, Charles E. Andrew, and Glen Woodruff
Chicago Bascule Bridge Company of Chicago, Illinois
City of Chicago
Clarence W. Hudson
Colonel Emmor B. Cope
Concrete-Steel Engineering Company of New York, New York
County of Alameda Surveyors Office
D. H. Overman
David Steinman of New York, New York
Department of Railways and Canals
Detroit Bridge and Steel Works of River Rouge, Michigan
Dravo Contracting Company of Pittsburgh, Pennsylvania
Dreibelbis and Company
E. A. Peugh of Santa Rosa, California
Edward P. Lupfer of Buffalo, New York
Edward S. Shaw of Boston, Massachusetts
Edward Von Geldern
Edwin Dwight Graves of Hartford, Connecticut
Edwin Kirtland Morse of Pittsburgh, Pennsylvania
Emil Swensson, of Mercantile Bridge Company
Ernest L. Ransome of New York, New York
Evrett S. Sherman of Galena, Ohio
F. W. Adgate of Chicago, Illinois
Farris Engineering Company of Pittsburgh, Pennsylvania
Fay, Spofford, and Thorndike of Boston, Massachusetts
Ferris, Kaufman, and Company of Pittsburgh, Pennsylvania
Foster Engineering Company
Frank Barber of Toronto, Ontario
Frank H. Shaw of Lancaster, Pennstlvania
Frank Lloyd Wright
Frank P. Adams
Frederick Blackburn Pelham
G. A. Flink
G. Edwin Pidcock Company
G. J. McLravy and Sons of Lansing, Michigan
Gérard Macquet
George F. Swain
George Jaap
George L. Vose
George S. Richardson
George S. Webster
Gustav Lindenthal
Gustav Lindenthal, Othniel Foster Nichols, and Leon Moisseiff
H. B. Hammill
H. C. Taylor
H. G. Balcom of New York, New York
Harold Hawley Corson
Harrington and Cortelyou
Harrington, Howard, and Ash
Harry K. Ellis
Hazelet and Erdal of Chicago, Illinois
Howard, Needles, Tammen and Bergendorff
Hugh E. Young of Chicago, Illinois
Illinois Division of Highways
Indiana State Highway Commission
J. A. L. Waddell
J. A. Patterson
J. A. Staag and Bruce Craig
J. C. Lewis
J. E. Greiner Company of Chicago, Illinois
J. G. White Engineering Company
J. H. Gray
J. P. Kirkwood and J. W. Adams
James B. Long and W. C. Frey
James Cresson
James, Proctor, and Redfern of Toronto, Ontario
John C. Prior
John D. Isaacs
John L. Stewart
John Lewis
John W. Storrs of Concord, New Hampshire
Joseph G. Henszey
Joseph Hobson
Karl A. Miller
Keller and Harrington
Lee and Nash of Brantford, Ontario
Leffert L. Buck
Leon Hagop Nishkian of San Francisco, California
Leonard & Day of San Francisco, California
Lupfer and Remick of Buffalo, New York
M. M. Dillon and Company
Mark C. Krause of Duboistown, Pennsylvania
Marsh Engineering Company of Des Moines, Iowa
Max L. Wilder, Maine State Highway Commission
Melvin B. Stone of Minneapolis, Minnesota
Michigan State Highway Department
Missouri State Highway Commission
Modjeski and Masters
Nathan R. Rambo
Newman and Armstrong
Norman C. Raab
O. O. Clayton
Ohio State Highway Department
Olaf Hoff of New York, New York
Ontario Department of Highways
Onward Bates
Othmar Ammann
P. A. Haviland
Parr and Kunz of Toronto, Ontario
Pennsylvania Railroad
Pennsylvania State Highway Department
Pennsylvania Turnpike Commission
Peter J. Weber
Peth and Reed of Pittsburgh, Pennsylvania
Philadelphia Department of Public Works
Philip Louis Pratley
Phoenix Bridge Company of Phoenixville, Pennsylvania
Pittsburgh Department of Public Works
R. M. Strohl
R.J. Teague and C. Ott
Ralph Burke
Ralph Modjeski
Richard B. Osborne
Richard Birdsall Rogers
Richardson, Gordon, and Associates
Robinson and Steinman
Sanderson and Porter of New York, New York
Sanitary District of Chicago
Saskatchewan Department of Public Works
Scherzer Rolling Lift Bridge Company of Chicago, Illinois
Seidel Studios of Chicago, Illinois
Sprague and Reppert of Pittsburgh, Pennsylvania
Squire Whipple
Standard Engineering and Contracting Company
Steinman, Boynton, Gronquist and London of New York, New York
Storrs and Storrs of Concord, New Hampshire
Strauss Bascule Bridge Company of Chicago, Illinois
Strauss Engineering Company of Chicago, Illinois
Sverdrup and Parcel of St. Louis, Missouri
T. B. Dinsmore
T. J. Wilkerson of Beaver Falls, Pennsylvania
Theodor Rall
Theodore Cooper
Thomas Gilkey
Thomas M. Griffith
Trygve Hoff and Associates
Vallée
Virginia State Highway Commission
W. H. Ashwell and Company
W. M. Hughes of Chicago, Illinois
Waddell and Hardesty
Waddell and Harrington
Wilbur J. Watson and Associates
William H. Brown
William H. Goshorn and Alvin John Stewart
William H. Harrison
William H. Law of Peterborough, Ontario
William H. Pratt
William S. Moore