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B A Scheeler (1)
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Basic Marine Inc. of Escanaba, Michigan (3)
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Bellefontaine Bridge & Iron Co. of Bellefontaine, Ohio (24)
Bellefontaine Bridge & Steel Co. (alternate name for Bellefontaine Bridge & Iron Co.)
Belmont Iron Works (1)
Belvidere Construction, Belvidere, Illinois (1)
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Ben C. Gerwick Co. (1)
Ben Cole & Sons of Ames, Iowa (4)
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Benjamin L. Crosby (4)
Benno Janssen (1)
Benton Jones (6)
Bergen & Bergen (1)
Berlin Construction Co. (10)
Berlin Iron Bridge Co. of East Berlin, Connecticut (46)
Berne Welch (1)
Berriman & Anderson (1)
Bethehem Steel
Bethlehem Pacific Coast Steel Co. (1)
Bethlehem Steel
Bethlehem Steel Bridge Co.
Bethlehem Steel Bridge Corp. of Steelton, Pennsylvania
Bethlehem Steel Co. (35)
Bethlehem Steel Corp. (2)
Bethlehem Steel Corporation.
Billmeyer, Nogel & Co., Lewisburg, Pa. (1)
Biltolast Products Inc. (1)
Black & Veatch (1)
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Boardman Co. (9)
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Bordwell & Zimmerman (1)
Boston Bridge Works (12)
Boston and Maine Railroad (1)
Boynton and Warriner of Cedar Rapids, IA (1)
Brackett Bridge Co. of Cincinnati, Ohio (18)
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Brookville Bridge Co. (24)
Brown & Root (1)
Buchanan Bridge Co. (1)
Buckeye Bridge Co. (1)
Buckeye Bridge Works (9)
Buckeye Portland Cement Co. of Bellfontaine, Ohio (1)
Buckland & Taylor (2)
Buckner Bros. (1)
Bud Gentry (1)
Built in 1881 by T.S. Christian (1)
Bullen Bridge Co. (alternate name for Pueblo Bridge Co.)
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Burgess & Niple of Columbus Ohio (1)
Burk Construction Co. (11)
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Byrne & Black (1)
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Byron B. Carter (1)

C W Deterding Jr (2)
C&O Railway (1)
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C.F. Lytle Co. of Sioux City, Iowa (3)
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C.G. Kershaw Contracting Co. (2)
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CHARLES A. WILLIAMS (4)
CHARLES A. WILLIAMS, CO ENG (6)
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CVRR (5)
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Cambria (9)
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Campbell Bros. (1)
Canton Bridge Co. of Canton, Ohio (128)
Capital City Construction Co. of Des Moines, Iowa (1)
Capital Construction Co.
Capitol Construction Co. of Columbus, Ohio (6)
Capt. Joseph Balsey (1)
Capt. Richard Delafield (1)
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Caputo and Keeble (1)
Carl Bjork (1)
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Carnegie (7)
Carnegie Steel Co. (4)
Carnegie, Phipps and Co. (1)
Carolina Concrete Co. (1)
Carolina Steel & Iron Co. (3)
Carolina, Clinchfield & Ohio Railroad (2)
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Cascade Bridge, LLC (1)
Caspar Weaver (1)
Cass Gilbert (1)
Cassimer Cramer (1)
Cast Iron Pile and Bridge Co. (1)
Cecil C. Arnold (1)
Central Bitulithic Co. (1)
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Central Concrete & Construction Co. of Canton, Ohio (2)
Central Construction Co. (3)
Central States Bridge & Structure Co. (2)
Central States Bridge Co. (22)
Central States Bridge Co. of Indanapolis, In (1)
Cha. W. Deterding (1)
Chambers and Dobson (1)
Chambersburg Bridge Co. (1)
Champion Bridge Co. of Wilmington, Ohio (70)
Champion Iron Co. (1)
Chaney & Armstrong (4)
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Chappel Construction Co. (1)
Charles A. Ellis (1)
Charles A. Sims & Co.-Contractors (1)
Charles A. de St. Maurice (1)
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Charles Carr (1)
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Charles D. Withers (1)
Charles Davis (5)
Charles E. Andrew (7)
Charles E. Neville (1)
Charles Ellet (1)
Charles Frederick Loweth (2)
Charles G. Huber (1)
Charles G. Sheely (3)
Charles G. Sheely Contracting Co. (1)
Charles H. Hull (1)
Charles H. Kendall (1)
Charles H. Mull (1)
Charles H. Parker (2)
Charles H. Purcell (21)
Charles Hartman, Jr. (1)
Charles Hopkins Cartlidge (1)
Charles Horton (6)
Charles Huffine (1)
Charles J. Glasgow (1)
Charles L. Strobel (2)
Charles Leonard (1)
Charles M. Smith (1)
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Charles Nathaniel Beckel (2)
Charles O. Holcombe (1)
Charles O. Young (1)
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Charles Peter Weeks (1)
Charles R. Wermuth & Sons, Inc. (1)
Charles S. Davis (1)
Charles S. Whitney (5)
Charles Scheidl (2)
Charles Shaler Smith (2)
Charles Vaughan (1)
Charles W. Stoughton (1)
Charles Wilson (1)
Charter Oak Construction Co. (1)
Chas A. Williams, Engineer (1)
Chas F. Loweth (1)
Chas H. Hamann (1)
Chas. M. Schoenfeld (1)
Chas. W. Deterding (1)
Chernus Construction Co. (1)
Cheshire Railroad (1)
Chester W. Schlusser, Jr., Contractor (1)
Chicago & Northwestern RR
Chicago & Western Indiana Railroad (1)
Chicago Bascule Bridge Co. (1)
Chicago Bridge & Iron Co. (4)
Chicago Bridge Co. of Chicago, Illinois (12)
Chicago Bridge and Iron Works Co. (2)
Chicago Milwaukee St. Paul & Pacific Railway
Chicago Northwestern Railway (-2)
Chicago Rock Island & Pacific
Chicago, Kansas and Nebraska Railway (1)
Chicago, Milwaukee St. Paul and Pacific Railroad (-4)
Chicago, Milwaukee, St. Paul & Pacific
Chicago, St. Paul and Fond du Lac Railroad (1)
Chicago, St.Paul, Minneapolis,Omaha Railroad (1)
Chico Construction Co. (1)
Chillicothe Iron Co. (1)
Chris O'Neil (1)
Christian Ankeny & Jacob Walter (1)
Christian Menn (1)
Christian T. Gutleben (5)
Christie-Hutchinson and Burton Co. (1)
Christy Corp. (1)
Cincinnati Bridge Co. (1)
Cincinnati Hamilton & Dayton Railroad (1)
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Civil Construction Co. (1)
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Civilian Conservation Corps (47)
Clackamas Construction Co. (4)
Clarence Burrow (1)
Clark & Henery (3)
Clark County (1)
Clark H. Eldridge (5)
Clark McDaniel (1)
Clark, Reeves, and Co. (1)
Clarke, Reeves & Co. (2)
Cleary - Kuery Co. (1)
Clement E. Chase (1)
Cleveland Bridge & Iron Co. (5)
Cleveland Bridge Co. of Cleveland, Ohio (1)
Cleveland, Cincinnati, Chicago, & St. Louis Railroad (1)
Clifford A. Dunn (1)
Clifford Holland (1)
Clinton Bridge & Iron Works of Clinton, Iowa (23)
Clinton Bridge Co. (alternate name for Clinton Bridge & Iron Works)
Clinton Bridge Works (4)
Clinton Smith Bridge Co. (1)
Coast Bridge Co. of Portland, Oregon (10)
Collier Bridge Co. (1)
Collins Haynes (1)
Colonial Building Co. (4)
Colonial Construction Co. (1)
Colorado Bridge and Construction Co. (1)
Colorado Fuel and Iron Corp. (1)
Columbia Bridge Co. (2)
Columbia Bridge Co. of Walla Walla, Washington (4)
Columbia Bridge Works of Dayton, Ohio (22)
Columbia Bridge Works, Dayton, OH (1)
Columbia Contracting Co. (1)
Columbus Bridge Co. (4)
Colusa Stone Co. (1)
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Compania de Ferrocariles de PR (1)
Concrete & Steel Construction Co. of Joplin, Missouri (7)
Concrete Construction Co. (1)
Concrete Steel Bridge Co. (3)
Concrete Steel Bridge Co. of Clarksburg, WV (1)
Concrete Steel Engineering Co. (1)
Conde B. McCullough (92)
Condon, Cunningham & Lemmon (2)
Continental Bridge (1)
Continental Bridge Co. of Alexandria, Minnesota (6)
Continental Bridge Co. of Alexandria, MN (1)
Converse Bridge Co. (8)
Cook & Ransom of Ottawa, Kansas (2)
Cook-O'Brien Construction Co. (1)
Cooper's Construction Service Co. (1)
Corbett Construction Co. (1)
Corman Construction (1)
Cornell & Co., Inc. (1)
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Corrugated Metal Co. (alternate name for Berlin Iron Bridge Co.)
Coshocton Iron Works (1)
Cotton Bros. and Co. (1)
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County Forces (1)
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Cowin Iron Works (3)
Cramer & Associates, Inc. (1)
Craven Smith (1)
Creech Bros. (2)
Croghan Construction Co. (2)
Crossan Construction Co. (1)
Cumberland Valley Railroad (1)
Cunningham & Johnson (1)
Curn Mathis (1)
Curwensville Construction Co. (1)
Cushman Fairleigh Co. (1)
Cutter and Malmgren (1)

D. C. Sampley (1)
D. M. McPhetres (1)
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D. W. McKenzie (1)
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D.F. Jones Construction Co. of Little Rock, Arkansas (5)
D.F. Keith (1)
D.H. Morrison (3)
D.H. Young of Manchester, Iowa (3)
D.H.Morrison (2)
D.J. Wise (1)
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DCF Engineeringm Cary, NC (1)
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DLZ Ohio, Designer (1)
Dakota Concrete Co. (1)
Dan Collom & Sons (1)
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Dan McIntier (1)
Daniel B. Luten (16)
Daniel Clouse (1)
Daniel Deering Construction Co. (1)
Daniel E. Beasley, P.E. (1)
Daniel E. Moran (1)
Daniel Jeffery & Sons Inc. (1)
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Darius Lapham (1)
Dauphin County (1)
David B. Steinman (12)
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David Evans & Associates (2)
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David Shriver, Jr. (1)
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David, Bigelow, and Stratton (1)
Davis Construction Co. (2)
Dawson Bridge Co. (1)
Day Laborers (1)
DeLong Corporation (1)
DeWaart and Son (1)
Dean & Westbrook (8)
Debolt Construction Co. (1)
Decatur Bridge Co. (16)
Decatur Iron & Steel Co. (1)
Decker & Hague (1)
Deering & Davidson (2)
Delaware Bridge & Iron Co. (1)
Delaware Lackawanna & Western Railroad (4)
Delaware River Port Authority (4)
Denithorne Bros. (1)
Dennis Scivally (1)
Denver Bridge Co. (1)
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Denver, South Park & Pacific Railroad (1)
Department of Highways (1)
Des Moines Bridge & Iron Works (2)
Des Moines Steel Co. of Des Moines (4)
Designed by Teng & Assoc (1)
Designer, Herman Tachau (1)
Desmond & Lord (1)
Detroit Bridge & Iron Works of Detroit, Michigan (7)
Detroit Bridge Co (1)
Detroit Bridge and Iron Co. (1)
Detroit Bridge and Iron Works of Detroit, MI (3)
Detroit Steel & Bridge Co. (1)
Dexter Smith (4)
Dickey & Saxon (1)
Dildine Bridge & Construction Co. (alternate name for Dildine Bridge Co.)
Dildine Bridge & Iron Co. (alternate name for Dildine Bridge Co.)
Dildine Bridge Co. (50)
Dolph Jones (1)
Donald H. Evans (2)
Douglas E. Johnson (1)
Dover & Wood (1)
Dr. Sena Kumarasena, Ph.D., P.E. (1)
Drake & Stratton (1)
Drake & Stratton Co, Contractors (1)
Dravo Contracting Co. (6)
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Drexel Construction Co. (1)
Dulin Construction (1)
Duncanson - Harrelson Co. (1)
Duncason-Harleson and Stolte Inc. (1)
Dunleavey Bros Co. (1)
Dunleith & Dubuque Bridge Co. (1)
Dunn McCarthy Co. (1)
Dunning Supply Co. (1)
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Dyer Brothers (1)

F. A. Steiger (3)
F. C. Phillips, Engineer (3)
F. D. Diefendorf Co. (1)
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F. E. Kelly (1)
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F. J. Maurer & Son (1)
F. L. Grimm (1)
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F.E. Ward Inc (3)
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F.K. Ketler Co. (1)
F.L. Odom (2)
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F.M. WAGMAN CO (1)
F.N. Hoffman (1)
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F.V. Ragsdale Co (1)
F.W. Adgate of Chicago (1)
F.W. Menke Stone & Lime Co. (1)
FIGG (1)
FRANCIS GEESEY (1)
FRANK G NASH (1)
Fair Williams and Co of Ottumwa, Iowa
Fair-Williams Bridge & Manufacturing Co. (1)
Fair-Williams Bridge Co. (1)
Fancus Machine Co. (1)
Fargo Bridge & Iron Co. (13)
Farnsworth & Blodgett (7)
Farris Bridge Co. (2)
Farris Engineering Co. (2)
Farris Engineering Co. of Pittsburgh, Pennsylvania (1)
Fay, Spofford and Thorndike (2)
Federal Bridge Co. (3)
Federal Engineering Co. (1)
Federal Highway Administration (1)
Feldshau and Chaffee (1)
Felix Benitez-Rexach (1)
Ferguson Construction Co. & Donald B. Ferguson, Rockford, Ill. (2)
Ferguson and Houston (1)
Ferris Engineering Co. (1)
Ferro Concrete Co. (2)
Ferro Concrete Co., Harrisburg, PA (1)
Ferry and Class (1)
Fifield Construction Co. (1)
Figg & Muller Engineering Group (3)
Figg Engineering Group, designers (1)
Finley Engineering Group (2)
Fisher Construction Co. (1)
Fisher, Ross, MacDonald, and Kahn (1)
Fitzsimons & Connell Co. (2)
Fitzsimons & Connell Dredge and Dock Co. (4)
Flatiron Construction Co. (1)
Flinn-Moyer Bridge Co. (1)
Floyd C. Frear (4)
Fogleman & Davidson (1)
Forcum James Co. (1)
Forrester-Swenson Construction Co. (1)
Forsgren Brothers (3)
Fort Pitt Bridge Co. (5)
Fort Pitt Bridge Works (12)
Fort Smith and Choctaw Bridge Co. (1)
Foster & Creighton Construction Co. (1)
Foster and Creighton Co. (1)
Foster-Creighton-Gould Co. (3)
Fought & Co. (1)
Foundation Co. of New York (4)
Fox Construction Co. (1)
Fox Redpath Construction Co. (1)
Francis C. Lowthrop (1)
Frank Auza (1)
Frank Boyle (1)
Frank Doran (3)
Frank Harry (1)
Frank J. Hanley, Asst. County Engineer (1)
Frank L. Gover (1)
Frank Lloyd Wright (1)
Frank McEnteer (2)
Frank Milward (1)
Frank P. Allen Jr. (1)
Frank Payne (2)
Frank Yehle (4)
Frankfurt Construction Co. (1)
Franklin Hiser Wissler (1)
Frazier-Davis Construction Co. (1)
Fred Boedecker (1)
Fred Byrne (1)
Fred L. Appleby (3)
Fred L. Klein (2)
Fred Luttjohann of Topeka, Kansas (9)
Fred M. Clark & Son (1)
Fred Schimmle (1)
Fred T. Fowler (2)
Fred Tracy (1)
Fred W. Appleby (1)
Fred Wustholz (1)
Frederic A. Nassaux & Assoc., Engineer (1)
Frederick Law Olmsted (1)
Frederick W. Panhorst (5)
Frederick William Cappelen (1)
Frederick von Emperger (1)
Fredericksburg Bridge Co. (1)
Freeland-Roberts & Co., Nashville, Tennessee (1)
Freygang & Trogon of Kansas City, Missouri (1)
Fritz S. Elving (1)
Fritz, Rummer, Cook Construction Co. (1)
Ft. Wayne Iron Works (1)

G. A. (1)
G. A. WAGMAN (1)
G. E. Cotton (1)
G. H. Gildersleeve (2)
G. H. Wallace (1)
G. W. ENSIGN (1)
G. W. ENSIGN, INC (1)
G.A WAGMAN (1)
G.A. & F.M. WAGMAN (1)
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G.E. Chroder, Designer (1)
G.F. Burch, Designer (1)
G.H. Weller (1)
G.K. Foster (1)
G.L. Johnson (1)
G.M. Tompson (1)
G.W. Ensign, Contractor (1)
GEORGE F.P. WANGER (1)
Gaines Bros. (1)
Gaines Brothers (1)
Gaines, Yeokum & Mackey (3)
Galen Clark (1)
Gannett Fleming, Inc. (1)
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Gary Rayor (1)
General Builders, Inc. (1)
General Construction Co. (13)
General Contracting Corporation (1)
Geo FP Wanger (1)
Geo Fink (1)
Geo. S. Nickerson, Engineer (1)
George A. Wagal (1)
George Ake (1)
George Bird (3)
George Boyer (1)
George Brandt (1)
George Burgan (2)
George Clark (1)
George D. Whittle (3)
George Dole, Cont. (1)
George E. Cole (1)
George E. Kessler (1)
George E. King Bridge Co. of Des Moines, Iowa (14)
George E. Schroeder, Engineer (3)
George F. Wightman (1)
George Fillmore Swain (1)
George Forder (1)
George H. Delano (1)
George H. Griffin Inc. (1)
George H. Turner (4)
George Hancock (1)
George Harkness (1)
George I. Brown (1)
George Kessler (1)
George L. Dunkelberger (1)
George L. Vose (1)
George McCollough (1)
George Nauman, Assistant Engineer (1)
George Notter (2)
George Pegram (7)
George Pollock & Co. (1)
George Probst (1)
George Ray (1)
George Reuss (1)
George Riffe (1)
George S. Morison (17)
George S. Webster (2)
George Spraker (1)
George Stevens (1)
George W. Breeding (1)
George W. Condon (4)
George W. Condon Co. (3)
George W. Holmes (1)
George W. Keefer (1)
George W. Rockwell (1)
George W. Rockwell, Sunbury for Sunbury Bridge Co. (1)
George W. Smith (1)
George W. Wynn (1)
George Weaver (2)
George Woerntz & Son (2)
George cressman (1)
Georgia Appalachian Trail Club (1)
Georgia Railroad (1)
Gerard Knutson (2)
Gerard Knutson Construction Co. (1)
Gerhard F. Stuewe Co. (1)
Gerrick & Gerrick (1)
Gibb Gilchrist (1)
Gilbert & Smith (1)
Gilbert H Macmillan (1)
Gildersleeve Construction Co. (2)
Gillette-Herzog Manufacturing Co. of Minneapolis, Minnesota (6)
Gilpin Construction (6)
Glen E. Stoner (3)
Glen M. Gordo (1)
Glen Wiley (Wiley-Maxon Construction Co.), Builder (1)
Glenn E. Bras (1)
Glenn S. Paxson (50)
Glenway Maxon (Wiley-Maxon Construction Co., Builder (1)
Globe Construction Co. (1)
Godfrey Messerli (3)
Good Roads Commission (2)
Gordon Construction Co. (1)
Gorton Bridge Co. (1)
Goshorn, N. Engineer (1)
Gould Contracting Co. (1)
Gradle Brothers (1)
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Graff Construction Co. (1)
Gragg Construction Co. (4)
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P.E. Lane (10)
P.F. Brendlinger, Contractor (1)
P.L. Frazier (2)
P.N. Gillham (1)
P.S. Easterday & Co. of Walla Walla, Washington (1)
PA RR (1)
PA STATE HWY DEPT BRIDGE DIV (3)
PA STATE HWY DEPT BRIDGE DIVISION (1)
PA STATE HWY DEPT BRIDGE UNIT (4)
PCL Civil Constructors, Inc., builder (1)
PCL Construction Enterprises (1)
PDM Bridge (1)
PENNSYLVANIA RR (1)
PWA (2)
Pacific Bridge Co. (20)
Pacific Bridge Co. Oakland, CA (1)
Pacific Construction Co. (3)
Pacific Electric Rail Road (1)
Pacific Iron Works (3)
Pacific Iron and Steel Co. (1)
Pacific Portland Cement Co. (1)
Pacific-Murphy Corporation (1)
Paige, Carey & Co. (1)
Paine & Gallucci Inc. (1)
Pakar Construction Co. (1)
Pan American Bridge Co. of New Castle, Indiana (25)
Pandora Cement Block Co. (1)
Parham Construction Co. (1)
Paris Bridge Co. (1)
Park Boulevard Co. (1)
Parker & Banfield (5)
Parker-Schram Co. (1)
Parsons (1)
Parsons Brinckerhoff (3)
Parsons Transportation Group (1)
Parsons, Brinckerhoff, Quade, & Douglas (1)
Parsons, Klapp, Brinckerhoff and Douglas (1)
Pasadena Water Division (1)
Passaic Rolling Mill Co. (1)
Passaic Rolling Mills (1)
Patapsco Bridge & Iron Works (1)
Patterson Steel Co. (2)
Patterson-Burghardt Bridge Co. (1)
Patterson-Burghardt Construction Co. (1)
Paul Bacco Construction Co. (1)
Paul D. Kaufmsan (per builders plate (1)
Paul D. Simpson (1)
Paul Jarvis Inc. (1)
Paul Kingsley of Strawberry Point, Iowa (1)
Paul P. Cret (1)
Paul Phillippe Cret (2)
Peacock Construction Co. (1)
Pearly Weaver (1)
Peart Bros. (1)
Peirce, James M. (1)
Pencoyd Bridge & Construction Co. (7)
Pencoyd Iron Works (6)
Penn Bridge Co. (35)
Penn Bridge Works (6)
Pennsylvania & Reading Railroad (1)
Pennsylvania Bridge Co. (1)
Pennsylvania Bridge Co. of Beaver Falls, PA (1)
Pennsylvania Canal Co. (1)
Pennsylvania Main Line Canal (1)
Pennsylvania Rail Road commissioned (1)
Pennsylvania Steel Co. (27)
Pennsylvania Turnpike Commission (7)
Pennsylvania state highway department (1)
Pennyslvania Bridge Co. (1)
Pensacola Shipbuilding Co. (1)
Peppard & Fulton (1)
Per builders plate (1)
Perkins Bridge & Supply Co. (2)
Perkins Brothers (1)
Perry McGlone Construction Co. (1)
Peter Keefer (1)
Peter Kiewit & Sons (6)
Peterson Builders Inc. (1)
Peterson and Earnhart (1)
Pharaoh & Co. (1)
Philip Ensminger (1)
Phillips Contracting Co. (2)
Phoenix Bridge Co. (33)
Phoenix Bridge Co. of Phoenixville, Pennsylvania (1)
Phoenix Iron Co. (6)
Pierce Bodner (1)
Pierce Gruber & Beam (1)
Piers built by, Tillman J. Gaydon. (1)
Pioneer Bridge Co. (3)
Pioneer Construction Co. of Kansas City, Missouri (25)
Pithie (1)
Pittsburg Bridge Co. (3)
Pittsburg Steel Casting Co. (1)
Pittsburg Steel Co (1)
Pittsburg Steel Construction Co (1)
Pittsburgh Bridge Co. (14)
Pittsburgh-Des Moines Steel Co. (8)
Plaque reads, "J.P. McNulty, Contractor, 1938." (1)
Pleasant-Hasler Contracting Co. (2)
Pope Construction Co. (2)
Porter Brothers Co. (2)
Porter-Dewitt Construction Co. (1)
Portland Bridge Co. (3)
Portland Dredging Co. (1)
Portland, Vancouver and Yakima Railroad (1)
Powell's Valley Railroad (2)
Pratt, Tomas & Caleb Co. (1)
Praytor, Howton & Wood (1)
Price Brothers (1)
Prison workers (1)
Provo Foundary & Machine Co. (1)
Public Works Administration (1)
Public Works Construction Co. (5)
Pueblo Bridge Co. of Pueblo, Colorado (16)
Puget Construction Co. (3)
Puget Sound Bridge & Dredging Co. (4)
Purcell & Clark (1)
Putnam & Healy Creelman (1)

S Severtgon (1)
S. & H. Howard & Co. (1)
S. B. Twining Co. (1)
S. E. Evans (1)
S. R. Gray (1)
S.B. Coutts (3)
S.H. Smith (1)
S.J. Cohen & Co. (1)
S.J. Riley (1)
S.M. Dixon (2)
S.P. White & Co. (1)
S.R. Wilcus (1)
S.S. Mullen Inc. (1)
SAMUEL A. ARNOLD (1)
SAMUEL ARNOLD (1)
STEWART & MARCH, INC (1)
Sahale LLC (1)
Saint Charles Bridge Co. (1)
Salle Construction Co. (1)
Salmond Emmons III (1)
Sam R. Boudrye (1)
Sam Reamsnyder (1)
Samuel & Neef (1)
Samuel Kraus Co. (1)
Samuel Lancaster (4)
Samuel Myers (1)
Samuel Ramsey & Co. (1)
Samuel Taylor (1)
Samuel W. Gumbes (1)
San Francisco Bridge Co. (2)
Sand Springs Home (1)
Sanders Construction Co., Contractor (2)
Sanders Contracting Co. (1)
Sandy Hites (1)
Sanitary District of Chicago (1)
Santiago Calatrava (2)
Santiago Calatrava, Designer (1)
Santina & Thompson (1)
Sargent Engineers (1)
Sarnias Bridge Co. (1)
Scaife Foundry & Machine Co. (1)
Schaffer Construction Co. (1)
Scherzer Rolling Lift Bridge Co. of Chicago, Illinois (5)
Schmidt Construction Company, Inc. (1)
Schmidt Engineering (1)
Schmidt Engineering Co. (2)
Schuler and McDonald (1)
Schuylkill Bridge Co. (1)
Scott Nettleton (1)
Seaboard Air Line Railway (10)
Security Bridge Co. (9)
Seevers Manufacturing Co. of Oskaloosa, Iowa (3)
Selby Bridge Co. (1)
Service Construction Co. (1)
Shappert Engineering Co. (2)
Shatto Construction (1)
Shaw and Wolke (1)
Sheppard, Winston and Co. (1)
Shimmick Construction (1)
Shoemaker & Co. of Pottstown, Pennsylvania (1)
Siah Armajani (1)
Sigvald Johannesson (1)
Silas Harry (10)
Silas Hussey, Jr. (1)
Simeon S. Post (1)
Simon DeGraff (1)
Simon Dreibelbies (1)
Simone Jaffe Collins (1)
Simpson Timber Co. (1)
Simpson-Parker Co. (1)
Sitts and Hill Engineers (1)
Six Companies Inc (1)
Skully Steel Co. (1)
Slayden Construction (1)
Smeeth Foundry Co. (1)
Smith & Greer (1)
Smith Bridge Co. of Toledo, Ohio (42)
Smith and Nichols (1)
Smith, Latrobe, & Co. (1)
Smith, McCormick Co. (1)
Smith-Sparks Construction Co. (1)
Snyder & Johnson of Humbolt, Iowa (3)
Snyder and Johnson
Snyder and Kramer (1)
Soloman Swiger, L. E. Strum (1)
Soo Line (3)
Sooysmith & Co. (1)
Soule Steel Co. (3)
South & Western Railroad Co. (2)
South & Western Railroad, later the Clinchfield Railroad (1)
South Pennsylvania Railroad (6)
South and Western Railroad (3)
South and Western Railway (6)
South and Western Railway Co. (3)
Southern Bridge Co. (2)
Southern Indiana Railroad (2)
Southern Pacific Railroad Engineering Department (1)
Southern Railroad (9)
Southern Railway Co., Design Engineers (2)
Southwestern Bridge Co. (1)
Sparks & Kinney (2)
Speria Construction Co. (1)
Springfield Bridge and Iron Co. (1)
Springtown Bridge Co. (1)
Squire Whipple (5)
St. Joseph Bridge & Iron Co. of St. Joseph, Missouri (2)
St. Louis Bridge & Iron Co. of St. Louis, Missouri (13)
St. Louis Bridge & Supply Co. (2)
St. Louis Construction Co. (1)
St. Louis County Hwy. Dept. (1)
St. Louis-San Francisco Railway (3)
St. Paul, Minneapolis & Manitoba Railway Co. (1)
Stacy & Witbeck (1)
Stalling Bros. (1)
Standard Bridge Co. (19)
Standard Engineering & Contracting Co. (2)
Standard Engineering Co. (1)
Standard Paving Co. (3)
Standish Engineering Co. (1)
Stanford Madden (1)
Stanley Barber Construction Co. (1)
Star Iron and Steel Co. (1)
Starbuck Iron Works (1)
State Of Minnesota (1)
State Of Ohio Department of Highways (1)
State of California Department of Public Works (1)
State of Indiana (1)
State of Tennessee Highway Department (2)
Steadfast Bridges (7)
Steadfast Bridges, Biltolast Products, Ft. Payne, AL (1)
Stebbinger Bros. (1)
Steel & Lebby of Knoxville, Tennessee
Steel & Lebby Bridge Co. of Knoxville, Tennessee (7)
Steel and Lebby Bridge Co.
Steelman Construction Co , Contractor (1)
Stein Construction Co. (1)
Steiner & Pollock (1)
Stephen Stone (1)
Stephens & Bolderston (1)
Sterling Bridge Construction Co (1)
Steven Brothers (1)
Stevenson,V.K (1)
Steward & McDermott (1)
Stewart & McDermott (1)
Stewart, Alvin John Engineer (1)
Stewart, Shirreffs & Co. (1)
Stokes & Whittingham (1)
Stone & Webster Engineering Corp. (1)
Stone and Boomer (1)
Stoops and Williamson (1)
Straits Construction Co. (1)
Strauss Bascule & Concrete Bridge Co. (1)
Strauss Bascule Bridge Co. of Chicago, Illinois (23)
Strauss Engineering Co. (3)
Strobel Engineering of Chicago (1)
Strobel Steel Construction Co. (4)
Strong and Grant (1)
Stupp Brothers Bridge & Iron Co. of St. Louis, Missouri (58)
Sullivan & Sullivan (2)
Susquehanna & Union Bridge Co. (1)
Sutton, Kennerly & Associates Engineering (1)
Sverdrup Civil, Inc (1)
Sverdrup and Parcel (15)

T. & S. White, Builders, New Brighton, PA (1)
T. C. Ottinger (1)
T. E. Jones (1)
T. L. Eyre (1)
T. Potisuk (1)
T. Saulpaugh & Co (1)
T. Stuart and Sons (1)
T. T. Polich & Associates (1)
T.A. Loving Co. (1)
T.A. Miller (3)
T.B.White (1)
T.F. Pyott Bridge Co., Chattanooga (1)
T.H. Banfield (1)
T.J. Brereton (1)
T.J. Morris (1)
T.Y. Lin International (3)
THOMAS M. ADAMS (1)
TY Lin International Structural Engineers (1)
Tacoma Narrows Constructors (1)
Taggart Construction Co. (1)
Tammen & Bergendoff (1)
Tapani Underground (1)
Tapp, H.W. (1)
Taylor & Majors (1)
Taylor & Murphy Construction Co. (1)
Taylor and Murphy Construction Co. (1)
Tennessee Bridge, Steel Co. Division, Johnson City, Tennessee (1)
Tennessee Central Railway Co. (1)
Tennessee Department of Transportation (2)
Tennessee Highway Department (1)
Tennessee Southern Railroad Co. (1)
Tennessee State Highway Department (18)
Tennessee Valley Authority (7)
Terrell Bartlett (1)
Teufel & Carlson (2)
Texas Bridge Co. (1)
The A. Bentley & Sons Co. of Jacksonville, Fla. (1)
The B&P Bridge Co. (1)
The Concrete Steel Engineering Co. (1)
The Construction Co. (5)
The Cope Bridge Co. (1)
The Drake and Stratton Co. (1)
The Foundation Co. (2)
The General Corporation (1)
The Harlan Co. (1)
The Lloyds Co. of Philadelphia (1)
The Luten Bridge Co. of York, PA (1)
The Luten Bridge Co., York, PA (1)
The Mason Syndicate (1)
The Millard-Quigg Construction Co. of Philadelphia, Pennsylvania (1)
The Oliver Co., Knoxville (1)
The Providence, Warren and Bristol Railroad (1)
The Ryerson Co. (1)
The South and Western Railroad (1)
The Southern Co., Birmingham (1)
The Spink Corp (1)
The United Construction Co. (2)
Theodor Rall (1)
Theodore C. Roake (5)
Theodore Cochran (1)
Theodore Zoli (1)
Thomas A. McGee (1)
Thomas B. Russell (1)
Thomas C. Fitzgerald (1)
Thomas C. Vint (1)
Thomas D. Lulay (1)
Thomas Ellis Brown (1)
Thomas Griffith (2)
Thomas Hardman (1)
Thomas K. Menifee (1)
Thomas M. Mock (1)
Thomas Matson, contractor (1)
Thomas McGilvray (1)
Thomas McQueen (1)
Thomas Pihlfeldt (3)
Thomas Reilly, Engineer (1)
Thomas Seabrook, Principle Asst. Engineer (1)
Thomas Seevers (1)
Thomas Slattery (1)
Thomas Staunton Co. (1)
Thomas and Post (3)
Thomas,William M., Allen & Fulton (1)
Thompson Brothers (1)
Thurlow, contractor (1)
Tibbets, Pleasant, Green & Beckman (1)
Ticonic Foot Bridge Co. (1)
Tillman Gaydon (1)
Timothy Horton (1)
Toledo Bridge & Crane Co. (3)
Toledo Bridge Co. (14)
Toledo Bridge and Crane Co. (1)
Toledo Massillon Bridge Co. (3)
Toledo St. Louis and Western Railroad (1)
Toledo, St. Louis, and Western(Cloverleaf)Railroad (1)
Tom Hull (1)
Tom Lillebo (1)
Tom Lyons (1)
Tonawanda Engineering Corp. (1)
Topeka Bridge & Construction Co. (3)
Topeka Bridge & Iron Co. (18)
Topeka Bridge & Iron Works (1)
Township Supply Co. (2)
Traylor Brothers Inc., AJV (1)
Trenton Locomotive & Machine Works (1)
Tri-State Construction (1)
Troy and Greenfield Railroad (1)
Trumball (1)
Tudor Engineering Co. (2)

U. S. Steel (1)
U.G. Jackson (1)
U.G.I. Contracting Co. (2)
U.S. Army Corps of Engineers (8)
U.S. Department of Agriculture (2)
U.S. Steel (1)
U.S. Steel Co. (1)
US Army
US Bridge (1)
US Department of Agriculture Forest Service (2)
US Forest Service (3)
US Steel Corp (1)
Ulysses Sumner Grant (1)
Under direction of Major C.S Riche (1)
Under the direction of C.S. Riche (1)
Union Bridge & Construction Co. (10)
Union Bridge Co. (28)
Union Bridge Co., Athens, Pennsylvania. (1)
Union Bridge and Construction Co. (1)
Union Construction Co. (1)
Union Iron Works. (1)
Union Iron and Bridge Co. (1)
Union Lumber Co. (2)
Unit Construction Co. (1)
United Construction Co. (2)
United Contracting Co. (1)
United Engineering and Construction (1)
United States Army (4)
United States Bridge Co. (1)
Universal Bridge Co. (1)
Universal Structural, Inc. (1)
Unknown (13)
Unknown Builder (1)
Unknown Philadelphia company (1)
Utah Crane & Rigging (1)
Utah Power (1)
Uvalde Construction Co. (1)

V. W. Clanton (1)
Van Camp Brothers (1)
Vanfossan & Noble (1)
Vang Construction Co. (1)
Variety Iron Works of Cleveland, Ohio (8)
Vaughn & Melton Consulting Engineers (1)
Vaughn Construction Co. (1)
Ventura County Railway (1)
Vermillion Brothers Contractors (1)
Vernon Bridge Co (1)
Vernon Covell (1)
Vierling Steel Works (3)
Vincennes Bridge Co. of Vincennes, Indiana (79)
Vincennes Bridge Co. , Contractor
Vincennes Bridge Co. of Vincennes, Indiana (2)
Vincennes Steel Corp. (1)
Virginia Bridge & Iron Co. (alternate name for Virginia Bridge Co.)
Virginia Bridge & Iron Works (alternate name for Virginia Bridge Co.)
Virginia Bridge Co. of Roanoke, Virginia (27)
Virginia Department of Highways (2)
Virginia Dept. of Highways (1)
Virginia Iron & Bridge Co., Roanoke (1)
Virginia Iron and Bridge Co. (1)
Virginia Turnpike Co. (1)
Vulcan Road Machine Co. of Charles Town, WV (1)

W E Bradley, Contractor (1)
W R SMITH (1)
W. A. Bechtel Co. (2)
W. B. Burch (1)
W. C. Babcock Grain Co., Contractor (1)
W. Denney Pate (1)
W. E. Dickerson (2)
W. E. Ireland (1)
W. H. DRAWBAUGH (3)
W. H. Eirely (1)
W. H. Murphy & Sons (1)
W. H. Witt (1)
W. Hasell Wilson (1)
W. M. Pickett & Co. (1)
W. N. Concanon, Builder (1)
W. R. Holway (1)
W. R. Montgomery (2)
W. S. Maloney (1)
W. S. Post (1)
W. T. Young Bridge Co. (3)
W. W Winslow (1)
W. W. Clyde & Co. of Springville, Utah (2)
W.A. Abrams (1)
W.A. Barnes (1)
W.A. Palmateer (1)
W.A. Ross Co. (1)
W.A. Ross Construction Co. (4)
W.B. Basset (1)
W.B. Chase (2)
W.B. King (1)
W.C. Earle (1)
W.C. Howton Co. of Birmingham, Alabama (1)
W.C. Johnson (4)
W.C. Marion (1)
W.C. McNeely Construction Co. (1)
W.C. Witt Co. (1)
W.E. Callahan Construction Co. (1)
W.E. Scott (1)
W.E.Pickens-Contractor (1)
W.F. Cresson (1)
W.F. Fogleman (1)
W.F. Luning (1)
W.G. Cook (1)
W.G. Fowler (4)
W.G. Jenks (1)
W.G. Watt Construction Co. (1)
W.H. & G.H. Turner (1)
W.H. Foreman (1)
W.H. Groome Son (1)
W.H. Knapp Co. (1)
W.H. Pratt (1)
W.H. Shons, Contractor (1)
W.J. Meagher and Sons (1)
W.J. Menefee Construction Co. (2)
W.M. Hendricks (2)
W.M. Pickett & Co. (1)
W.McCarthy-Contractor (1)
W.O. Graham (2)
W.P. McGeorge & Co (1)
W.P.A. 1942
W.R. Larsen (1)
W.S. Hewett (1)
W.S. Hewett & Co. (3)
W.S. MacDonald (1)
W.T. Butler Co. (1)
W.T. Young Bridge Co. (1)
W.W. Allen (1)
W.W. Boxley and Co. (2)
W.W. Morehouse (1)
W.W. White Steel Construction Co. (1)
WALTER BROMBAUGH (1)
WALTER DRAWBAUGH (1)
WC Pennington (1)
WILLIAM H. DRAWBAUGH (2)
WILLIAM WAGNER & BROS (1)
WPA
Wabash Bridge & Iron Works (3)
Wabash Railroad (13)
Wabash Railroad B&B crew (1)
Wabash and Erie Canal (2)
Wabash-St. Charles Bridge Co. (1)
Waddell & Hardesty (1)
Waddell & Harrington (15)
Waddell & Hedrick (4)
Waddell & Son (1)
Wadell & Son (1)
Wagman Construction, Inc. (1)
Wakefield & Jacobson (1)
Walker Brothers of Charleston, West Virginia (2)
Wallace Bridge and Structural Steel Co. (5)
Wallace Marshall (1)
Wallace-Coates Engineering Co. (1)
Walsh & Thomas (1)
Walsh Construction Co. (2)
Walsh-Burney & Moore (1)
Walter Bagley (1)
Walter E. Myers- Contractor (1)
Walter J. Hart (4)
Walter Moore (1)
Walter Sharp Bridge Co. (7)
Walter Sorenson (1)
Walter Weaver (1)
Walters & Son (5)
Walters Brothers (6)
Ward & Teslow of Decorah, Iowa (1)
Ward & Ward, Inc. (2)
Ward Brothers (1)
Ward and Keepers of Clinton, Iowa (1)
Warren & Wetmore (1)
Warren Cressman (2)
Warren F. Cressman (2)
Washington A. Roebling (2)
Washington State Department of Transportation (1)
Washington W. King (2)
Washington W.King (1)
Washington Water Power Co. (1)
Waterloo Construction Co. (1)
Watson Manufacturing Co. (3)
Wauna Toll Bridge Co. (1)
Wausau Bridge and Iron? No data. (1)
Wausau Iron Works (8)
Wayland Bridge Co. (1)
Weeks & Day (1)
Welden Brothers Construction Co. of Iowa Falls, Iowa (5)
Wendel Bollman (4)
Wendell Bollman (1)
Wesley Hartman (1)
West & Jamison (1)
West Arkansas Construction Co. (1)
West Coast Steel Works (6)
West Penn Bridge Co. (1)
West Virginia Bridge Works (1)
Western Bridge & Construction Co. of Omaha, Nebraska (7)
Western Bridge & Construction company (1)
Western Bridge Co. of Harrisonville, Missouri (16)
Western Bridge Co., Omaha, NE (1)
Western Bridge Works (3)
Western Construction Co. (1)
Western Engineering Constructors Inc. (1)
Western Maryland (1)
Western Maryland Railroad (1)
Western Maryland Railway (2)
Western Pacific Erectors (1)
Western Wood Structures (1)
Westinghouse Electric Corporation (1)
Weyerhauser Co. (1)
Weymouth Construction Co. (1)
Wheeler Bridge Co., Minneapolis, MN (1)
Wheeler Inc. LLC, Minneapolis, MN (1)
Wheelock Bridge Co. (2)
Wheelock, McKay & Goshorn (1)
Wheelwright Construction Co. (1)
Wheelwright, Haven and Hoyt (1)
Whit Pass & Yukon Railroad (1)
Whitham Construction Co. (2)
Whitson & Kirby (2)
Whittaker & Diehl (1)
Wichita Construction Co. (1)
Wickham Bridge & Pipe Co. (1)
Wicks Engineering & Construction Co. (1)
Wilbur Watson & Associates of Cleveland (1)
Wilder Construction Co. (1)
Wildish Standard Paving Co. of Eugene, Oregon (3)
Will Pardue (1)
Willaeur & Co. Contractors (1)
Willard Construction Co. (1)
William A. Bugee (1)
William A. Irelan (1)
William A. Irwin (1)
William A. Pratt, Assistant Chief Engineer (1)
William Burr (1)
William Butts (1)
William C. Smith (1)
William Cowin (1)
William F. Luning (2)
William Fish Williams (1)
William Forsythe (1)
William Funk (1)
William G. Preston (1)
William Grimmett (1)
William Gunn (1)
William H. Brown (1)
William H. Brown, Chief Engineer (3)
William H. Brown, Chief Engineer, PRR (1)
William H. C. Greer (1)
William H. Ferguson (1)
William Hasell Wilson (1)
William Hildenbrand (1)
William Hood (1)
William Jackson (2)
William John McDannald (1)
William Krome (3)
William Lang (1)
William M. Hughes (1)
William M. Thomas (4)
William Marshall & Son (1)
William McComas (1)
William O'neal and Sons Construction (1)
William Peyton Day (1)
William Rezner (3)
William Sooy Smith (2)
William T. Washer (4)
William T. Washer & Son (1)
William V. Ingham (1)
William Valleau (1)
William Yates (1)
Williams & Douglas (1)
Williams Bridge Co. (1)
Williamson and Williamson Bridge Construction (1)
Willis B. Horn (1)
Wilson Bros (1)
Wilson Construction Co. (1)
Winamac Bridge Co. (3)
Windaor, Coleman & King (1)
Winfield Fries (1)
Winterburn and Lumsden (1)
Wisconsin Bridge & Iron Co. of Milwaukee, Wisconsin (51)
Wisconsin Bridge Co. (1)
Wisconsin Bridge and Iron Co.
Wisconsin State Highway Commission (4)
Wisconsin, Minnesota & Pacific (1)
Witham Construction Co. (1)
Wm H. Brown-Chief engineer (1)
Wm Wagman and Bro (of Dallastown), Contractor (1)
Wood and Witten (1)
Woods Brothers Construction Co. (1)
Woodward Construction Co. (1)
Worden and Allen Co. Milwaukee, WI
Worden-Allen Co. of Milwaukee, Wisconsin (14)
Works Progress Administration (139)
Wright Lyons and Co. (1)
Wrought Iron Bridge Co. of Canton, Ohio (179)
Wynkoop & McGormley (3)

Y.P. Reagan (1)
YORK ENGR & CONST CO (1)
Yancey Construction Co. (2)
Yancy Construction Co. (2)
Yant Construction Co. (1)
Yawger & Betterfeld of Indianapolis, Indiana (1)
Yeager & Sons (1)
York Bridge Co. of York, Pennsylvania (17)
York Bridge Co. for Sunbury Bridge Co. (1)
York Rail (1)
York Railroad (1)
Yost Brothers (1)
Youngstown Bridge Co. of Youngstown, Ohio (18)

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