Browse by Builder
(Companies, Contractors, Engineers, etc.)
Jump to: * | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z- * -
- A -- A & M Concrete Products Co. of Clear Lake, Iowa (1)
- A & P Roberts Co. of Pencoyd, Pennsylvania (33)
- A Bentley & Sons (1)
- A Teichert & Sons Inc of Sacramento, California (1)
- A&L Construction Co. of Hattiesburg, Mississippi (1)
- A&P Roberts Co. (1)
- A. Guthrie & Co. of St. Paul, Minnesota (9)
- A. Ives (1)
- A. M. Cohron & Sons of Des Moines, Iowa (1)
- A. Martini & Co. (1)
- A. Morton Thomas & Associates of Rockville, Maryland (1)
- A. Olson Construction Co. of Waterloo, Iowa (15)
- A. Soda & Son (1)
- A. V. Saph (1)
- A.A. Davis Construction Co. (1)
- A.C Wood Construction Co. (1)
- A.C. Boyle & Co. of McGregor, Iowa (3)
- A.D. Briggs & Co. of Springfield, Massachusetts (5)
- A.D. O'Brien of Wilmington, North Carolina (1)
- A.E. Shorthill Co. (2)
- A.G. Ryan & Sons (1)
- A.J. Cheff Construction Co. (1)
- A.J. Yawger Co. of Indianapolis, Indiana (2)
- A.L. Greenberg Iron Co. (1)
- A.M. Kennedy & Sons (22)
- A.P. Poirot Construction Co. of Belleville, Illinois (3)
- A.S. Lyon, (1)
- A.S. Miller & Sons of Eugene, Oregon (1)
- A.W. Stedman of Mauch Chunk, Pennsylvania (1)
- A.Y. Bayne & Co. of Minneapolis, Minnesota (10)
- ABKJ Inc. of Seattle, Washington & Bangalore/Bengaluru, Karnataka, Republic of India (2)
- AECOM of Los Angeles. California (3)
- APAC of Kansas City, Kansas (1)
- ARUP of London, England, United Kingdom (1)
- Aadams, Thomas M. (1)
- Abarca, Isidoro (1)
- Aberthaw Construction Co. of Boston, Massachusetts (3)
- Abrams, W.A. (2)
- Achey, E.D. (1)
- Ackley, Joshua (1)
- Ackley, Samuel (1)
- Acrow Corporation of America of Parsippany, New Jersey (12)
- Adain Bros. (1)
- Adam, John (1)
- Adams Construction Co. (1)
- Adams, Arthur C. (2)
- Adams, H. C. (1)
- Adams, Jack of Endee, New Mexico (1)
- Adams, Julius W. (1)
- Adams, Milo (2)
- Adams, Milo A. of Minneapolis, Minnesota (6)
- Adams, W. A. (1)
- Adgate, F.W. of Chicago, Illinois (1)
- Adolph Green Construction Co. (1)
- Advance Construction Co. of Waukesha, Wisconsin. (2)
- Aetna Bridge (1)
- Agnew Construction Co. (1)
- Agnew, Spiro T. (1)
- Ake, George (1)
- Alabama Dry Dock & Shipbuilding Co. of Mobile, Alabama (1)
- Alabama Road Commission (1)
- Alamo Construction Co. of San Antonio, Texas (2)
- Albany Bridge Co. (1)
- Alberici Constructors of St. Louis, Missouri (1)
- Albina Engine & Machine Works of Portland, Oregon (1)
- Albinson Construction Co. (1)
- Alcoa of Pittsburgh, Pennsylvania (1)
- Alden & Lassig Bridge & Iron Works of Chicago, Illinois (6)
- Alden, John F. of Cohoes, New York (1)
- Alderman, E. S. (1)
- Aldrich, W. R. (1)
- Alesghem & Sons Rope Co. (1)
- Alex Findlay & Co. of Motherwell, North Lanarkshire, Scotland, United Kingdom (1)
- Alexander & Charles Provost (1)
- Alexander & Higby of Des Moines, Iowa (1)
- Alexander Brociner (1)
- Alexander von Babo (4)
- Alexander, W. H. (1)
- Alfred Caldwell (1)
- Alfred Cook & James Allen (2)
- All-Steel Equipment Co. (1)
- Allaman, Jacob (1)
- Allan A. Myers, Inc. of Malvern, Pennsylvania (1)
- Allen & Fulton of Topeka, Kansas (2)
- Allen, C. E. (1)
- Allen, McEvoy & Co. of Beloit, Wisconsin (2)
- Allen, W.W. (1)
- Allentown Bridge Co. of Allentown, Pennsylvania (1)
- Allied Contractors, Inc. of Omaha, Nebraska (2)
- Allied Structural Steel Co. of Chicago, Illinois (4)
- Alpine Construction (8)
- Alsbury & Co., A.A. (1)
- Altman-Rogers Co. of Oklahoma City, Oklahoma (2)
- Alton-St. Louis Bridge Co (1)
- Alvin John Stewart (3)
- Ambrose-Burdsall Co. (1)
- Ambursen Hydraulic Construction Co. of Boston, Massachusetts (3)
- AmerCom Corp. of Parsippany, New Jersey (1)
- American Arch and Culvert Co. of Toledo, Ohio (1)
- American Bascule Bridge Co (1)
- American Bascule Bridge Corp. of Pensacola, Florida (1)
- American Bridge & Iron Co. of Roanoke, Virginia (2)
- American Bridge Co. of New York (1,367)
- American Bridge Works of Chicago, Illinois (28)
- American Civil Constructors of Littleton, Colorado (1)
- American Coal Co., and Maryland Coal Co. (1)
- American Concrete Co. (1)
- American Construction Co. of Chicago, Illinois/Dallas, Texas/Houston, Texas (2)
- American Consulting Engineers of Lexington, Kentucky (1)
- American Paving & Construction Co. (1)
- American Pile Driving Co. of Everett, Washington (1)
- American Steel & Wire Co. (2)
- Ames Construction Inc. of Burnsville, Minnesota (2)
- Amis Construction Co. of Oklahoma City, Oklahoma (2)
- Ammann & Whitney of New York City, New York (2)
- Ammann, Othmar of Feuerthalen, Canton of Zürich, Switzerland (12)
- Amos Campbell (2)
- Amos Melberg Co. of Cedar Rapids, Iowa (5)
- Anamosa State Penitentiary Convicts of Anamosa, Iowa (1)
- Anden, Van (1)
- Andersen Bjornstad Kane of Seattle, Washington (1)
- Andersen Construction Co. of Portland, Oregon (1)
- Anderson & Barr (1)
- Anderson, Albert (1)
- Anderson, Gust (1)
- Anderson, Lars (1)
- Anderson, O.A. (1)
- Andrew Weston Co. of Rouses Point, New York (1)
- Andrew, Charles E. (9)
- Andrews & Locke of Baltimore, Maryland (1)
- Andrews, D. H. (1)
- Andrews, David H. (1)
- Andrews, George H. (1)
- Andrews, Tim (1)
- Angeles Gravel & Supply Co. of Port Angeles, Washington (2)
- Angus McGuire of Great Falls, Montana (1)
- Angwin, Henry R. (19)
- Anil Verma Associates, Inc. (1)
- Anlaan Construction (1)
- Annear, E. H. (2)
- Anschutz, W.J. of Saginaw, Michigan (1)
- Aparicio, Martin (1)
- Appleby, Fred L. (3)
- Appleby, Fred W. (1)
- Appleby-Frodingham Steel Co. of Scunthorpe, North Lincolnshire, England, United Kingdom (1)
- Appleton & Davis (1)
- Applied EarthWorks, Inc. of Fresno, California (1)
- Archibald, Raymond (2)
- Archie Alphonso Alexander of Des Moines, Iowa (1)
- Arkansas Bridge & Steel Co. (1)
- Arkansas Bridge Co. of Kansas City, Kansas (1)
- Arkansas General Construction Co. of Little Rock, Arkansas (1)
- Arkansas Highway Department (2)
- Armajani, Siah of Tehrān, Islamic Republic of Iran (1)
- Armour Townsend Granger of Austin, Texas (1)
- Armstrong & Sons (1)
- Armstrong & Ugland (1)
- Armstrong Co. of Chicago, Illinois (1)
- Armstrong, J.H. (5)
- Arnold M Graton Associates Inc of Ashland, New Hampshire (12)
- Arnold, Cecil C. of Seattle, Washington (3)
- Arnold, James (1)
- Arnold, Justin (1)
- Arnold, Samuel A. (3)
- Arthur Andersson, designer (1)
- Arthur De Wint Foote (2)
- Arthur G. Leake & Co. (1)
- Arthur McMullen Co. of New York City, New York (4)
- Artingstall, S. G. of Chicago, Illinois (1)
- Artmann, Edwin of Lee, Texas (1)
- Arute Brothers (1)
- Arvid Grant & Associates of Seattle, Washington (2)
- Ash, Charles (1)
- Ash, Howard, Needles, & Tammen of Kansas City, Missouri (9)
- Ash, John (1)
- Ash, John W. (2)
- Ash, M. R. (1)
- Ash, Sig (1)
- Ashley, P. N. (1)
- Ashton, Ned L. of Iowa City, Iowa (17)
- Associated Contractors Inc. of Monroe, Louisiana (1)
- Atkinson-Windle Co. of Chillicothe, Missouri (3)
- Atlantic Bridge Co. (4)
- Atlantic Bridge Co. of Charlotte, North Carolina (5)
- Atlantic Bridge Co. of Greensboro, North Carolina (1)
- Atlantic Bridge Co. of Roanoke, Virginia (4)
- Atlantic County of New Jersey (1)
- Atlantic, Gulf & Pacific Co. of New York City, New York & Sacramento, California (8)
- Atlas Machine & Iron Works of Arlington, Virginia (5)
- Attica Bridge Co. of Attica, Indiana (34)
- Audley General Contractors of Bow, New Hampshire (1)
- Ault, J.C. (2)
- Ault-Rich Construction Co. of Cassville, Missouri (5)
- Austin Bridge & Road, Inc. (alternate name for Austin Bridge Co.)
- Austin Bridge Co. of Dallas, Texas/Atlanta, Georgia (34)
- Austin Brothers Bridge Co. (alternate name for Austin Bridge Co.)
- Austin Road Co. (alternate name for Austin Bridge Co.)
- Austin, A.H. of Webster City, Iowa (6)
- Austin, George F. of North Kingstown, Rhode Island (1)
- Auza, Frank (1)
- Aylett, Philip (1)
- Ayres, Richardson of Hope, Arkansas (4)
- B -- B&O Mount Clare Shops of Baltimore, Maryland (14)
- B&O Railroad (1)
- B&P Bridge Co., The (1)
- B&W Concrete Co. of Newark, New Jersey (1)
- B. Griffin & Son (1)
- B. Perini & Sons, Inc. of Framingham, Massachusetts (1)
- B. W. Candage & Sons of Seal Harbor, Maine (3)
- B.J. McGrann & Co. of Lancaster, Pennsylvania (2)
- B.P. Panas & Co. of Houston, Texas (1)
- BASKERVILLE & CO ENG'S BIRMINGHAM, AL (1)
- BNIM of Kansas City, Missouri (1)
- Babbitt, Charles (1)
- Bagley, C. W. (1)
- Bagley, Walter (1)
- Bailey Bridge Co, Inc of Abilene, Texas (2)
- Bailey Brothers (1)
- Bailey, E.W. (1)
- Bailey, J.A (1)
- Bailey, W.E. (1)
- Bainbridge, Charles W. (1)
- Baird Brothers of Pittsburgh, Pennsylvania (2)
- Baker & Koontz of Carthage, Missouri (3)
- Baker white pine lumber company (1)
- Baker, Ira O. (1)
- Balchin, W. G. of Providence, Rhode Island (1)
- Baldwin, Archibald Stuart of Winchester, Virginia (1)
- Baldwin, Issac (1)
- Ball, Charles H. of East Windsor, Massachusetts (4)
- Ball, Edward P. (1)
- Balsey, Capt. Joseph (1)
- Baltimore Bridge Co. of Baltimore, Maryland (7)
- Banden, Butin & Bowman (2)
- Banfield, T.H. (1)
- Bangs, Anson, & Co. (1)
- Barally & Ingersoll of Rochester, New York (3)
- Barber Construction Co. (3)
- Barcus, L.G. (2)
- Barham Brothers (1)
- Barlow & Mackey (1)
- Barnes, K.W. (1)
- Barnes, W.A. of Storm Lake, Iowa (3)
- Barnhardt, F.H. (1)
- Barnsley, George T. (1)
- Barnum and Counihan (1)
- Barron & Hole (1)
- Bart Moore, Inc. of San Antonio, Texas (4)
- Bartlett & Kling Co. of Cedar Rapids, Iowa (4)
- Bartlett & Ranney Inc. of San Antonio, Texas (1)
- Basic Marine Inc. of Escanaba, Michigan (3)
- Basset, W.B. (2)
- Bassi, D.M. (2)
- Batcheler, Bowen, and Wolverton (1)
- Bateman Contracting Co. of Nashville, Tennessee (1)
- Bates & Rogers Construction Co. of Chicago, Illinois (13)
- Bates, Onward of St. Charles County, Missouri (2)
- Bates, R.E. (2)
- Bates, Thomas C. (1)
- Batson Brothers (1)
- Bauer, Jacob L. (1)
- Baumert, M. of Astoria (1)
- Bay Shipbuilding Corp. of Sturgeon Bay, Wisconsin (1)
- Bayne & Hewett of Minneapolis, Minnesota (3)
- Beach, Lansing H. (1)
- Bean & Co. (1)
- Bear Creek Co. (1)
- Bear Creek Construction Co. of Landisville, Pennsylvania (1)
- Beard, Elmer H. (1)
- Beard, John (2)
- Beard, R.R. (1)
- Beattie & Cornell (1)
- Beatty, E.S. of Blair, Nebraska (1)
- Bechly, Ernest C. (1)
- Bechtel Corporation of San Francisco, California (2)
- Beckel Iron Foundry and Machine Shop of Bethlehem, Pennsylvania (5)
- Becker, Donald (1)
- Becker, M. J. (1)
- Beckwith & Quackenbush of Rome, New York & Mohawk, New York (1)
- Bedford Foundry & Machine Co. (1)
- Bedford Iron Works (1)
- Bedwell Co. (1)
- Beebe Orchard Co. of Chelan, Washington (1)
- Beekman, Green of Oklahoma City, Oklahoma (1)
- Beer's Building Co. of Seattle, Washington (1)
- Beley Construction Co. of Livingston, Montana (1)
- Bell & Associates of Kansas City, Missouri (2)
- Bell & Bell of Watertown, Tennessee (2)
- Bell and Breckinridge (1)
- Bell, A.C. (1)
- Bell-Bockel Co. of Altoona, Pennsylvania (1)
- Bellefontaine Bridge & Iron Co. of Bellefontaine, Ohio (28)
- Bellefontaine Bridge & Steel Co. (alternate name for Bellefontaine Bridge & Iron Co.)
- Bellows, Robert P. (1)
- Belmont Iron Works of Chester, Pennsylvania (4)
- Belvidere Construction of Belvidere, Illinois (1)
- Bement-Witt Lumber Co. of Shell Rock, Iowa (1)
- Ben C. Gerwick Co. (3)
- Ben Cole & Sons Construction Co. of Ames, Iowa (9)
- Ben Pipes (1)
- Bender, P.F. (1)
- Benesch of Chicago, Illinois (2)
- Benjamin Henry Latrobe II of Philadelphia, Pennsylvania (3)
- Benjamin Lord (1)
- Benjamin M St. John (1)
- Benjamin Sweeten (1)
- Bennett & Talbot of Greensburg, Pennsylvania (2)
- Bennett, A.G. (2)
- Bennett, J.D. (1)
- Bentley & Sons Co. of Jacksonville, Florida (1)
- Benton, Robert (1)
- Benítez-Rexach, Félix of Isla de Vieques, Puerto Rico (3)
- Bergen & Bergen of Franklin, Indiana (1)
- Berger/Abam Engineers, Inc. (1)
- Bergmann Associates (1)
- Berkeley Steel Co. (1)
- Berlin (1)
- Berlin Bridge Co. of New Berlin, Connecticut (1)
- Berlin Construction Co. of Berlin, Connecticut (40)
- Berlin Iron Bridge Co. of East Berlin, Connecticut (151)
- Bernhisel Construction Co. of Chicago, Illinois (1)
- Berriman & Anderson (1)
- Berry, Jacob (3)
- Berry, William M. (1)
- Bert Stark (1)
- Bethlehem Pacific Coast Steel Co. of Seattle, Washington (1)
- Bethlehem Steel Bridge Corporation of Steelton, Pennsylvania (3)
- Bethlehem Steel Co. of Bethlehem, Pennsylvania (126)
- Bette & Cring of Latham, New York (1)
- Bibb, C.F. (1)
- Bicknell, Warren of Cleveland, Ohio (2)
- Big 4 Railroad (1)
- Big R Bridge (1)
- Big Wabash Bridge Co. of Carmi, Illinois (1)
- Biggs & Pauley of Winfield, Kansas (1)
- Bigley, Richard A. (1)
- Bill Barnard of Ames, Iowa (1)
- Billmeyer, Nogel & Co. of Lewisburg, Pennsylvania (1)
- Billner, Karl P. (14)
- Biltolast Products Inc. of Ft. Payne, Alabama (2)
- Bingham, C.A. (1)
- Bingham, Henry (1)
- Bird, George of Harrisonville, Missouri (3)
- Birdsall, George W. (2)
- Birkemeier & Sarema of Portland, Oregon (1)
- Birnie, Alexander (5)
- Bishop, A.D. (12)
- Bishop, Jacob (2)
- Bishop, Judson W. of St. Paul, Minnesota (1)
- Bitner, Jonathan (1)
- Bitterell, W.J. of Webster City, Iowa (1)
- Bjork, Carl (1)
- Black & Veatch of Kansas City, Missouri (1)
- Black, William (1)
- Blackburn & Whiteside of Mammoth Springs, Arkansas (1)
- Blackshire & Blackshare (2)
- Blackwell Engineering Co. of Merrifield, Virginia (3)
- Blackwell, Roll (1)
- Blair, John (1)
- Blaisdell, Frank H. (1)
- Blaisdell, Hiram W. (1)
- Blake, E. J. (1)
- Blakeley, C.W. (1)
- Bland, J.C. (2)
- Blankenstein, E. of Temple, Texas (1)
- Blodgett Construction Co. of Kansas City, Missouri (2)
- Blodgett, A.M. of Kansas City, Missouri (24)
- Bloomfield Bridge & Culvert, Inc. of Bloomfield, Iowa (1)
- Blount Brothers Construction Co. of Shreveport, Louisiana (1)
- Blow & Cote Inc. of Morrisville, Vermont (8)
- Blumschein, E.W. of Ames, Iowa (1)
- Blythe, William (1)
- Boardman Co. of Oklahoma City, Oklahoma (11)
- Bock, C.H. (1)
- Bodine, S.L. (1)
- Bodner, Pierce (1)
- Boedecker, Fred (1)
- Bogert-Carlough Co. of Paterson, New Jersey (1)
- Bohn, H. M. (1)
- Bohren, F. (1)
- Bohrofen, Mathias of Saarbrücken, Saarland, Germany (1)
- Boise Construction Co. of Boise, Idaho (1)
- Boise Iron Works of Boise, Idaho (1)
- Boll, Charles (1)
- Boller & Hodge of New York, New York (2)
- Boller, Alfred P. of Philadelphia, Pennsylvania (8)
- Bollman, James (2)
- Bollman, Wendel of Baltimore, Maryland (17)
- Bond, H.D. of McMinnville, Oregon (1)
- Bonebrake, F.T. (1)
- Boner, C.P. (1)
- Bontrager Construction Co. (1)
- Boody, Stone & Co. of Springfield, Massachusetts (1)
- Booker, Kiehl & Whipple of Seattle, Washington (1)
- Boomer, McGuire & Blakesley of Great Falls, Montana (1)
- Booth & Flinn Co. of Pittsburgh, Pennsylvania (7)
- Booth & Glinn Co. (1)
- Booth & Pomeroy, Inc. of Portland, Oregon (3)
- Borchers, Perry E. (1)
- Bordwell & Zimmerman of Calistoga, California (1)
- Borg & Ericson of Chicago, Illinois (1)
- Borneman, August (4)
- Borntreger, Moses (1)
- Borthwick, Pringle of Philadelphia, Pennsylvania (1)
- Boss Construction, Inc. (1)
- Boston & Maine Bridge Crew (1)
- Boston Bridge Works of Boston, Massachusetts (94)
- Bothers, Lindstrom (1)
- Bottomfield, A.D. (1)
- Boudrye, Sam R. (1)
- Bowen, W.F. (1)
- Bower, Jacob (3)
- Bowerman & McCloy of Seattle, Washington (2)
- Bowers, J.S. of Whitesville, North Carolina (1)
- Bowlby, Henry L. (1)
- Bowman, Lloyd (2)
- Boyd E. Phelps Co. of Michigan City, Indiana (1)
- Boyer, George (1)
- Boyington, Rust, & Bruce of Chicago, Illinois & Marseilles, Illinois (2)
- Boyle, Blair (1)
- Boyle, Frank (1)
- Boynton & Warriner of Cedar Rapids, Iowa (1)
- Brackbill, Christian (1)
- Brackett Bridge Co. of Cincinnati, Ohio (22)
- Brackett Bridge Co. (likely fabricator). (1)
- Braden, Richard J. (1)
- Bradley, W. E. (1)
- Bradley, William (1)
- Brady & Simpson (1)
- Braley, Zacheus (1)
- Brandt, George (2)
- Brandt, Jacob R. (3)
- Bras, Glenn E. of Muskogee, Oklahoma (1)
- Brasfield & Gorrie, LLC of Birmingham, Alabama (1)
- Braun-Fleming-Knollman & Prior of Columbus, Ohio (1)
- Bravo Corporation (1)
- Brayman Construction Corp (1)
- Brazos River Bridge Co. (2)
- Breckenridge, W. L. of Chicago, Illinois (1)
- Breeding, George W. (1)
- Brendlinger, P.F. of Philadelphia, Pennsylvania (6)
- Brennan, J.P. (1)
- Brennecke & Fay of St. Louis, Missouri (1)
- Brereton, T.J. (1)
- Bresee, Jared N. (2)
- Breslin Construction Co. of Louisville, Kentucky (1)
- Bridge Commision (1)
- Bridge Construction Corporation of Augusta, Maine (1)
- Bridges, C.G. (1)
- Bridgewater, John (1)
- Briggs, Alexander (3)
- Briggs, John C. (1)
- Brink, John (2)
- Briscoe Construction Co. of Stillwater, Oklahoma (1)
- Bristol Steel & Iron Works of St. Louis, Missouri (1)
- Britton Bridge, LLC of Knoxville, Tennessee (1)
- Britton, Eugene (1)
- Britton, Joseph A. (17)
- Broad, J. C. (1)
- Broadman Co. (1)
- Brolley, Thomas (1)
- Bromaugh, Walter (1)
- Bronson, R. J. (1)
- Bronx Asphalt Corporation of New York City, New York (1)
- Brookfield Construction Co. (1)
- Brooks & Dahlgren of Oklahoma City, Oklahoma (1)
- Brooks & Mixon of Decatur, Alabama (1)
- Brookville Bridge Co. of Brookville, Ohio (25)
- Bros, Hannam-Hickeys of St. Louis, Missouri (1)
- Bros, McArthur of New York City, New York (3)
- Bros, Wilson of Geneva, Illinois (1)
- Broughton Lumber Co. of Underwood, Washington (1)
- Broughton, Charles (1)
- Broughton, Frank (1)
- Brown & Root Inc. of Houston, Texas (10)
- Brown Brothers of Lansing, Michigan (1)
- Brown, Baxter L. (1)
- Brown, Curtis S. (1)
- Brown, D.M. (1)
- Brown, George I. (1)
- Brown, Glenn (1)
- Brown, James R. (1)
- Brown, Joseph (1)
- Brown, Thomas Ellis (3)
- Brown, William H. (18)
- Brubaker, John T. (2)
- Brubaker, M. N. (1)
- Bruce, R. N. (1)
- Bruecker & Granitoid Co. (1)
- Bruley, Richard (1)
- Brunner, Arnold W. of New York City, New York (1)
- Brunnier, H.J. (1)
- Bryan, C. A. (1)
- Bryant, Josiah (1)
- Buchanan Bridge Co. of Bellefontaine, Ohio (1)
- Buchanan County Secondary Roads Department of Independence, Iowa (1)
- Buchanan, A. of Chambersburg, Pennsylvania (1)
- Buchanan, J.W. (6)
- Buchholz, C. W. (1)
- Buck, Leffert L. of Canton, New York (6)
- Buckeye Bridge Co. (1)
- Buckeye Bridge Works of Cleveland, Ohio (16)
- Buckeye Portland Cement Co. of Bellefontaine, Ohio (1)
- Buckingham, Cathernius (2)
- Buckland & Taylor Ltd. of North Vancouver, British Columbia, Canada (7)
- Buckman, O.H. (3)
- Buckner Bros. of Cleburne, Texas (5)
- Buckner, John F. of Cleburn, Texas (1)
- Bud King Construction Co. of Missoula, Montana (1)
- Buddington, J. E. of New Haven, Connecticut (2)
- Buffalo Bridge & Iron Works of Buffalo, NY (1)
- Bugee, William A. (1)
- Bullen Bridge Co. (alternate name for Pueblo Bridge Co.)
- Bumpy's Steel Erection of East St. Louis, Illinois (1)
- Burch, G.F. (1)
- Burch, W. B. (1)
- Burdett, F.O. (2)
- Burdick Bros. Inc. (1)
- Burdine Construction Co. of Magnolia, Arkansas (1)
- Bureau of Indian Affairs (2)
- Burgan, George (2)
- Burger Iron Co. of Mogadore, Ohio (1)
- Burgess & Niple of Columbus, Ohio (1)
- Burk Construction Co. of New Castle, Indiana (16)
- Burket, Bud (1)
- Burket, R. C. (1)
- Burkhardt Steel Co. (1)
- Burnham & Ives of Bloomington. Illinois (3)
- Burnham & Root (1)
- Burnham, Daniel H. (1)
- Burnham, Joseph B. of Gloucester, Massachusetts (1)
- Burns & McDonnell of Kansas City, Missouri (3)
- Burns, Edward C. (1)
- Burnside, L.E. (1)
- Burr, Fred (1)
- Burr, Theodore of Torrington, Connecticut (4)
- Burr, William (1)
- Burr, William H. (2)
- Burrington, M.J. (1)
- Burrow, Clarence (1)
- Burrow, W. C. of Malvern, Arkansas (1)
- Burt, George (1)
- Burtle, Joe (1)
- Burton Construction Co. of Richmond, Virginia (2)
- Bush, Lincoln (3)
- Bushman Construction Co. of St. Josesph, Missouri (4)
- Bushman Construction Co., St. Joseph, Missouri (1)
- Business Men's League of Durand, Wisconsin (1)
- Bussell, Erastus (1)
- Butcher & Sweeny (2)
- Butler, Alfred D. (3)
- Butler, Drury D. (3)
- Butler, Fairman & Seufert Inc. (1)
- Butler, M. P. (1)
- Butler, Merrill (6)
- Butler, William (1)
- Butler-Ryan Co. of St. Paul, Minnesota (2)
- Button, A.E. (1)
- Butts, William (1)
- Butzer, G.D. (6)
- Byer, J.J. (1)
- Byrne & Blake of Dubuque, Iowa (1)
- Byrne Brothers Dredging & Engineering Co. of Chicago, Illinois (2)
- Byrne, Fred (1)
- C -- C&F Teaming & Trucking Co. of Butte, Montana (1)
- C. A. Holvil (1)
- C. A. Rasmussen Inc. of Valencia, California (1)
- C. C. Myers, Inc (2)
- C. G. Willis & Sons (1)
- C. Macdonald & Co. (1)
- C. P. Macarthur (1)
- C. W. Deterding, Jr of Sacramento, California (3)
- C.A. Grinde Co. of Norway/Taopi Township, South Dakota (1)
- C.A. Wever & Son of Clayton, Illinois (3)
- C.C. Keeper (1)
- C.D. Caldwell (1)
- C.E Carson Co. of Chicago, Illinois (1)
- C.E. Maxwell & Son (1)
- C.F. Dinsmore Co. of Ogden. Utah (3)
- C.F. Hunt Co. of Indianapolis, Indiana (1)
- C.F. Johnson & Son (1)
- C.F. Lytle Co. of Sioux City, Iowa (3)
- C.H. Atkinson Paving Co. of Chillicothe, Missouri (6)
- C.H. Turner Construction Co. of Pensacola, Florida (1)
- C.H. Wildman (1)
- C.J. Parker (1)
- C.L. Hubner Co. (1)
- C.M Ingersoll (1)
- C.M. Bolton-Asst. (1)
- C.M. Corkum Co. (1)
- C.M. Neeld Construction Co. of Pittsburgh, Pennsylvania (2)
- C.M. Russell & Co. (1)
- C.P. Allen Contracting Co. of Denver, Colorado (1)
- C.P. O'Reilly & Co. of St. Louis, Missouri (3)
- C.R. Boulton of Columbus, Ohio (1)
- C.R. Dart (2)
- C.S. Aldrich of Guthrie Center, Iowa (1)
- C.S. Christian (1)
- C.S. d'Invilliers (1)
- C.T. Felix Construction Co (1)
- C.T. Fogle Construction Co. (1)
- C.W. Atkinson Paving Co. of Saint Joseph, Missouri (1)
- C.W. Bishop (2)
- C.W. Blakeslee & Sons of New Haven, Connecticut (2)
- C.W. Bowles Co. of New York, New York (1)
- C.W. Lane & Co. Inc. of Atlanta, Georgia (1)
- C.W. Requarth Co. (1)
- C.Y. Thomason Co. of Greenwood, South Carolina (2)
- CCC (3)
- CJ Mahan Construction Co. of Grove City, Ohio (2)
- CMI-Promex, Inc. of Pedricktown, New Jersey (1)
- CON/SPAN Bridge Systems of West Chester, Ohio (1)
- CRAY, B.J. (1)
- Cady, William (1)
- Cafrode & Saylor (1)
- Cage Bros. of Bishop, Texas (5)
- Cage Brothers (1)
- Calatrava, Santiago of Benimàmet, Valencia, Spain (3)
- Caldwell & Drake Iron Works of Columbus, Indiana (1)
- Caldwell, M.M. (3)
- Calhoun, A. (1)
- Calhoun-Burns & Associates Inc. of West Des Moines, Iowa (1)
- California Bridge & Construction Co. (1)
- California Division of Highways (2)
- California Highway Commission (2)
- Call Construction Co. (1)
- Calley, Charles D. (1)
- Callihan & Wallmar, and Carl Partin (1)
- Caltrans (4)
- Calumet Land Co. (1)
- Calvert Vaux and Frederick Law Olmsted (1)
- Calvert Vaux and Jacob Wrey Mould (3)
- Cambria Iron Works of Johnstown, Pennsylvania (2)
- Cambria Steel Co. of Johnstown, Pennsylvania (20)
- Camden Iron Works (1)
- Cameron Bros. & Finley (1)
- Cameron and Halby (1)
- Cameron, McManus, & Joyce of Keokuk, Iowa (1)
- Camp Fire Girls of America of Kansas City, Missouri (1)
- Camp, Carl of Bethlehem, Pennsylvania (2)
- Campbell Bros. of Kansas City, Missouri (1)
- Campbell, Alexander (1)
- Campbell, Colonel of Dallas, Texas (1)
- Campbell, H.L. (1)
- Campbell, Henry R. (1)
- Campbell, Jack (1)
- Canal, Pennsylvania (2)
- Canion-Francis & Royden of Phoenix, Arizona (2)
- Cannady, H. L. (1)
- Cannon & Associates of Phoenix, Arizona (1)
- Canton Bridge Co. of Canton, Ohio (183)
- Canzanelli, Andrew (1)
- Capital City Brick & Pipe Co. of Des Moines, Iowa (1)
- Capital City Construction Co. of Des Moines, Iowa (1)
- Capital Engineering & Construction Co. (1)
- Capital Steel Co. of Lincoln, Nebraska (2)
- Capitol Construction Co. of Columbus, Ohio (7)
- Capitol Construction Co. of Texas (1)
- Cappelen, Frederick William of Drammen, Buskerud, Norway (3)
- Capps, Edwind (1)
- Captain Watkie of Menasha, Wisconsin (1)
- Caputo and Keeble (1)
- Carl H. Parker of Fairfield, Iowa (1)
- Carlos Bianchi Inc. (1)
- Carman, Duane (1)
- Carmichael-Cryder of St. Louis, Missouri (2)
- Carmoega, Rafael of Río Piedras, Puerto Rico (1)
- Carnegie Steel Co. of Pittsburgh, Pennsylvania (42)
- Carney, B. (1)
- Carolina Bridge Co. of Orangeburg, South Carolina (1)
- Carolina Concrete Co. of Greensboro, North Carolina (1)
- Carolina Steel & Iron Co. of Greensboro, North Carolina (4)
- Carolina Steel Corporation of Winston-Salem, North Carolina (1)
- Carpenter, D.S. of Des Moines, Iowa (1)
- Carpenter, Ed of Portland, Oregon (1)
- Carpenter, James C. (5)
- Carr, Capt. Jonathan (1)
- Carr, Charles (1)
- Carrington, David (1)
- Carrother & Huggins Contractors (1)
- Carrothers & Crouch of Kansas City, Kansas (3)
- Carrère & Hastings of New York City, New York (1)
- Carson, A. B. of Bryan, Texas (1)
- Carswell, William B. of Wilmington, Delaware (1)
- Carte-Harlin Construction Co. of West Plains, Missouri (1)
- Carter & Co. of Salem, Oregon (2)
- Carter & Hughes (1)
- Carter, B. J. (2)
- Carter, Byron B. (1)
- Carter, Carl (1)
- Carter, E.C. of Chicago, Illinois (1)
- Carter, Robert D. (1)
- Cascade Bridge, LLC of Vancouver, Washington (1)
- Cascade Construction Co. of Portland, Oregon (2)
- Case Construction Co. of Mt. Airy, Maryland (2)
- Case Crane & Engineering Co. of Columbus, Ohio (1)
- Case, A.D. (1)
- Casement, John S. of Geneva, New York (1)
- Cason, A.J. (1)
- Cast Iron Pile & Bridge Co. of Keosauqua, Iowa (1)
- Catching, C.A. (2)
- Catt, George W. (1)
- Causey, Joseph (1)
- Cavenagh, Dan J (1)
- Cayuga Bridge Co. (1)
- Cedar Rapids Construction Co. of Cedar Rapids, Iowa (2)
- Cedar Valley Quarry of Cedar Valley, Iowa (7)
- Central Bitulithic Construction Co. of Dallas, Texas (3)
- Central Bridge Co. of St. Louis (1)
- Central Bridge Works of Buffalo, New York (1)
- Central Concrete & Construction Co. of Canton, Ohio (4)
- Central Construction Co. of Harrisburg, Pennsylvania (3)
- Central Engineering Co. Inc. of Seattle, Washington (1)
- Central Iron & Steel of Harrisburg, Pennsylvania (2)
- Central States Bridge & Structure Co. (alternate name for Central States Bridge Co.)
- Central States Bridge Co. of Indianapolis, Indiana (39)
- Chalfant, James (2)
- Chamberlain, John (1)
- Chamberlain, W.G.S. (4)
- Chamberlin, Harrison (1)
- Chamberlin, Mahlon (1)
- Chambers & Dobson of New Hampton, Iowa (2)
- Chambers, E.L. of New Hampton, Iowa (1)
- Chambers, J. E. (1)
- Chambersburg Bridge Co. of Chambersburg, Pennsylvania (1)
- Champion Bridge Co. of Wilmington, Ohio (91)
- Champion Iron Co. (1)
- Chandler, Theophilus P. (1)
- Chandra, Vijay of Fairfax Station, Virginia (1)
- Chaney & Armstrong of Washington, Pennsylvania (5)
- Chaney Engineering Co. of Washington, Pennsylvania (1)
- Chanute, Octave of Paris, France (7)
- Chapman Timber Co. of Chapman, Oregon (1)
- Chappel Construction Co. of DeSoto, Missouri (1)
- Chappel, R.D. (1)
- Chappell, T.F. (1)
- Charles A. Sims & Co. of Philadelphia, Pennsylvania (2)
- Charles A. de St. Maurice (1)
- Charles B. Hawley & Co. of Washington, D.C. (1)
- Charles Butler (1)
- Charles Frederick Loweth of Cleveland, Ohio (26)
- Charles G. Kershaw Contracting Co. of Birmingham, Alabama (2)
- Charles Hartman, Jr. (1)
- Charles Hopkins Cartlidge of New York City, New York (2)
- Charles J. Glasgow Co. of Detroit, Michigan (2)
- Charles Nathaniel Beckel of Bethlehem, Pennsylvania (2)
- Charles Nelson & Co. (1)
- Charles O. Hamar Jr. (5)
- Charles Peter Weeks of San Francisco, California (1)
- Charles R. Wermuth & Sons, Inc. of Fort Wayne, Indiana (1)
- Charles Shaler Smith of Pittsburgh, Pennsylvania (7)
- Charles W. Deterding (1)
- Charles Ward Engineering Works of Charleston, West Virginia (1)
- Charles, Kellogg & Maurice Bridge Co. (1)
- Charter Oak Construction Co. (1)
- Chas. M. Schoenfeld & Sons of Tyler, Texas (1)
- Chase, Clement E. (1)
- Chase, Marvin (1)
- Chase, W.B. (3)
- Chauncey A. Reese (1)
- Cheever, A.S. (1)
- Cheney & Trumbull (1)
- Cheney, George M. of Indianapolis, Indiana (1)
- Chenoweth, Eli (1)
- Chenoweth, Lemuel (2)
- Cherf Brothers (1)
- Chernus Construction Co. of St. Louis, Missouri (2)
- Chesapeake and Ohio Canal Co. (1)
- Chester W. Schlusser, Jr. (1)
- Chicago Bascule Bridge Co. of Chicago, Illinois (1)
- Chicago Bridge & Iron Co. of Chicago, Illinois (23)
- Chicago Bridge & Iron Works of Chicago, Illinois (8)
- Chicago Bridge Co. of Chicago, Illinois (17)
- Chicago Forge & Bolt Co. of Chicago, Illinois (1)
- Chico Construction Co. (1)
- Childers Construction Co. of Columbus, Ohio (1)
- Childs, D.W. (1)
- Childs, Horace (2)
- Childs, John W. (2)
- Childs, O.W. of St. Louis, Missouri (1)
- Chillicothe Iron Co. of Chillicothe, Missouri (1)
- Chillion Johnson (1)
- Chittenden, Samuel (1)
- Chris O' Neill of Platteville, Colorado (2)
- Christensen Brothers, Inc. of Cherokee, Iowa (1)
- Christian Ankeny & Jacob Walter (1)
- Christian, C. E. (1)
- Christian, T.S. (1)
- Christiansen, John (1)
- Christie-Hutchinson and Burton Co. (1)
- Christy Corp. (1)
- Christy Corporation, Sturgeon Bay, Wisconsin (1)
- Christy, Bruce V. of Seattle, Washington (1)
- Chroder, G.E. (1)
- Churchill, Harry (3)
- Cianbro Corporation of Pittsfield, Maine (14)
- Cie Participation Belgue of Belgium (1)
- Cincinnati Bridge Co. (1)
- Cincinnati Southern Division (1)
- Citizens of Elgin or (1)
- City of Chicago (1)
- City of Cincinnati, Ohio (2)
- City of Detroit Department of Parks and Boulevards of Detroit, Michigan (1)
- City of Pasadena (1)
- City of West Allis (1)
- Civil Construction Co. (1)
- Civil Works Administration (6)
- Civilian Conservation Corps (138)
- Clackamas Construction Co. of Clackamas, Oregon (5)
- Claggett & Sons (1)
- Clanton, V. W. (1)
- Clarahan, Charles H. (1)
- Clare, Jacob (1)
- Clarence, Edmonds (1)
- Clarey Quert Construction Co. of Indianapolis, Indiana (1)
- Clark & Henery of Stockton, California (3)
- Clark & Westbrook of New York City, New York (1)
- Clark County (1)
- Clark, "Boston" John (1)
- Clark, Alfred S. (1)
- Clark, Daniel (1)
- Clark, Fred M. (1)
- Clark, Galen (1)
- Clark, George (1)
- Clark, J.P. (2)
- Clark, John (1)
- Clarke, C. A. (1)
- Clarke, Reeves & Co. of Philadelphia, Pennsylvania (13)
- Clarke, Reeves and Co. (1)
- Clarke, Thomas Curtis (1)
- ClearWater Constructors of Mercer, Pennsylvania (1)
- Clearly Brothers Construction Co (1)
- Cleary-Kuert Construction (1)
- Cleary-White Construction Co. of Chicago, Illinois (8)
- Clehorn, John C. (1)
- Clement, John (1)
- Clement, Lewis M. (1)
- Cleveland Bridge & Car Works of Cleveland, Ohio (5)
- Cleveland Bridge & Iron Co. of Cleveland, Ohio (8)
- Cleveland Bridge Co. of Cleveland, Ohio (4)
- Cleveland, Lou B. of Watertown, New York (2)
- Cleverdon, Varney & Pike of Boston, Massachusetts (3)
- Clifton & Applegate (1)
- Climax Road Machine Co. (1)
- Clinton Bridge & Iron Works of Clinton, Iowa (67)
- Clinton Bridge Co. (alternate name for Clinton Bridge & Iron Works)
- Clinton Bridge Works (alternate name for Clinton Bridge & Iron Works)
- Clinton Engineering Co. of Clinton, Iowa (1)
- Clinton Smith Bridge Co. (1)
- Clotts, Herbert V. (1)
- Clouse, Daniel (1)
- Clouser, Andrew (1)
- Clover Howard & Huston Co (1)
- Coast Bridge Co. of Portland, Oregon (11)
- Coburn, Larned (1)
- Cochran, Theodore (1)
- Cofrode & Saylor of Philadelphia, Pennsylvania (1)
- Coggin & Deermont of Chipley, Florida (1)
- Cole & Jones (1)
- Cole, Charles W. (1)
- Cole, George (1)
- Cole, George E. (1)
- Coleman Breuchaud & Co. (1)
- Coleman Brothers of Boston, Massachusetts (2)
- Collier Bridge Co. of Indianapolis, Indiana (3)
- Collins Engineering Co. (3)
- Collins Engineering Inc (1)
- Collins, C. C. of Richland County, Ohio (1)
- Collins, Charles (1)
- Collins, John (1)
- Colonial Building Co. of Spokane, Washington (4)
- Colonial Construction Co. (1)
- Colonial Steel & Iron Co (1)
- Colorado Bridge & Construction Co. of Denver, Colorado (3)
- Colorado Fuel & Iron Corp. of Pueblo, Colorado (1)
- Colton, John D. (2)
- Columbia Bridge Co. (1)
- Columbia Bridge Co. of Dayton, Ohio (11)
- Columbia Bridge Co. of Walla Walla, Washington (4)
- Columbia Bridge Works of Dayton, Ohio (48)
- Columbia Contracting Co. (1)
- Columbus Bridge Co. (7)
- Colusa Stone Co. (1)
- Commodore C.C. Bartlett (1)
- Commonwealth Engineering Co. (1)
- Commonwealth of Pennsylvania (1)
- Comstock & Sherwood of Johnsonville, New York (1)
- Comstock-Haigh-Walker Co. of Detroit, Michigan (5)
- Con Plex (1)
- Con-Struct, Inc. of Ames, Iowa (1)
- Concanon, W. N. of San Francisco, California (2)
- Concarron (2)
- Concrete & Steel Construction Co. of Joplin, Missouri (9)
- Concrete Building & Construction Co. of South Norwalk, Connecticut (1)
- Concrete Construction Co. (1)
- Concrete Engineering Co (2)
- Concrete Steel Bridge Co. of Clarksburg, West Virginia (6)
- Concrete-Steel Bridge Co. of Clarksburg, WV (1)
- Concrete-Steel Engineering Co. of New York, New York (15)
- Condon, Cunningham & Lemmon (2)
- Condon, George W. (4)
- Condron, T.L. (1)
- Cone Brothers (1)
- Confluence of Des Moines, Iowa (1)
- Connecticut Department Of Transportation (1)
- Conner, Addison (1)
- Consolidated Steel Corporation of Wilmington, California & Orange, Texas (1)
- Consolidated Western Steel Co. of Los Angeles, California & Orange, Texas (4)
- Construction Technologies & Engineering, Inc. of Portsmouth, Rhode Island (1)
- Contech Bridge Solutions Inc. of Fort Payne, Alabama (3)
- Continental Bridge Co. of Peotone, Illinois & Chicago, Illinois (8)
- Continental Bridge Co. of Alexandria, Minnesota (7)
- Continental Bridge Co. of Philadelphia (6)
- Contractor-Barletta Materials and Const. Inc (1)
- Converse Bridge & Steel Co. of Chattanooga, Tennessee (1)
- Converse Bridge Co. of Chattanooga, Tennessee (11)
- Cook & Ransom of Ottawa, Kansas (2)
- Cook, James (1)
- Cook, Jim (1)
- Cook-O'Brien Construction Co. of Kansas City, Missouri (1)
- Cooney, Edward (1)
- Cooper's Construction Service Co. (1)
- Cooper, Theodore (4)
- Cope Bridge Co. (1)
- Cope, Emmor B. (1)
- Copeland, Arad (1)
- Corbaley, C. W. (1)
- Corbett Construction Co. of Louisville, Kentucky (1)
- Corbetta Concrete Corporation of New York City, New York (1)
- Corcoran Brothers of Chester County, Pennsylvania (1)
- Corcoran Construction Co. (2)
- Coreslab Structures of Omaha (2)
- Corman Construction of Annapolis Junction, Maryland (1)
- Corneilus Barnes (1)
- Cornelius Barnes (1)
- Cornell & Co., Inc. of Westville, New Jersey (1)
- Cornell Heights Improvement Co. (1)
- Cornell, Ezra (1)
- Cornell-Young Co. Inc. of Macon, Georgia (1)
- Corning Inc. (1)
- Corrigan, Lee & Halpin of Kansas City (1)
- Corrigan, McKinney & Co. (1)
- Corrugated Metal Co. (alternate name for Berlin Iron Bridge Co.)
- Corthell, E.L. (4)
- Corwin Iron Works of Lambertville, New Jersey (5)
- Coryell, Richard (1)
- Coshocton Iron Works of Coshocton, Ohio (1)
- Cotton Brothers of Oakland, California (4)
- Cotton States Bridge Co. of Atlanta, Georgia (1)
- Cotton, G. E. (1)
- Cottongim Enterprises of Salem, Indiana (1)
- County of Yuba (1)
- Coutts, S.B. (3)
- Covell, Vernon R. (2)
- Cowin Iron Works of Lambertville, New Jersey (5)
- Cowin, Charles (1)
- Cowin, William (1)
- Cowing Engineering Co. of Cleveland, Ohio (1)
- Cox, Eli of Ohio (2)
- Cozens, John (1)
- Crafts, Nathan (1)
- Craig, Elijah (1)
- Craig, John (1)
- Cramer & Associates, Inc. of Grimes, Iowa (5)
- Cramer Brothers Construction Co. of Des Moines, Iowa (2)
- Cramer, Cassimer (1)
- Crandall Engineering Co. (1)
- Crane Co. of Chicago, Illinois (1)
- Crane-Hogan Structural Systems of Spencerport, New York (1)
- Crawford Construction Co. of Cincinnati, Ohio (1)
- Crawford, H. W. (7)
- Creative Pultrusions, Inc of Pleasantville, Pennsylvania (1)
- Crebo Construction Co. of Kansas City, Missouri (1)
- Creech Bros. Contracting Co. of South Bend, Washington (2)
- Creelman, C.L. (1)
- Creelman, Putnam & Healy (2)
- Cressman, George (1)
- Cressman, Warren (2)
- Cressman, Warren F. (2)
- Cresson, James (5)
- Cresson, W.F. (1)
- Cret, Paul P. (2)
- Crick, R.M. (2)
- Crittenden, O.H. (1)
- Crocker, Herbert S. (1)
- Croghan Construction Co. (2)
- Crosbie, J.A. (1)
- Crosby & Parker of Brattleboro, Vermont (2)
- Crosby, Benjamin L. of St. Louis, Missouri (4)
- Cross, L.N. of New York City, New York (1)
- Cross, Richard (1)
- Crossan Construction Co. of Philadelphia, Pennsylvania (1)
- Crossett Western Co. of Wauna, Oregon (1)
- Crouch Engineering P.C. of Brentwood, Tennessee (1)
- Crowell, E.H. (1)
- Crowell, George (1)
- Crowell, James (1)
- Crozet, Claudius (2)
- Cry Brothers of Waterville, Maine (1)
- Culbertson Construction Co. Pana IL (1)
- Culbertson, R.G. (3)
- Cullinan, R.A. of Tremont, Illinois (1)
- Culp, J.F. of Skidmore, Missouri (1)
- Cummings Construction (1)
- Cunningham & Johnson (1)
- Cunningham, J.E. of Spokane, Washington (1)
- Cunningham, Jeremiah (1)
- Cunningham, Monty & Co. (1)
- Cunningham, Thomas F. of Ticonderoga, New York (1)
- Curran, Kenneth E. (1)
- Curtis, F.S. (2)
- Curtis, Fredrick (1)
- Curtiss, W. W. (1)
- Curwensville Construction Co. of Curwensville, Pennsylvania (3)
- Cushion, James (1)
- Cushman Fairleigh Co. (1)
- Cutter and Malmgren (1)
- D -- D. A. Bohlen & Son (1)
- D. A. Collins Construction Co. of Wilton, New York (1)
- D. Bromfield & C. Tobey Jr. (1)
- D. C. Cloud & George Leffingwell, Sr. (1)
- D. H. Dalton Co. (1)
- D. Minnotti (1)
- D. Munro & Co. (1)
- D.A. Molitor (1)
- D.D. McBean (1)
- D.F. Jones Construction Co. of Little Rock, Arkansas (6)
- D.H. & C.C. Morrison (1)
- D.P. Le Fevre (1)
- D.S. McClanahan & Son (1)
- DCF Engineering of Cary, North Carolina (1)
- DLZ of Louisville, Kentucky (2)
- DRC Construction LLC of Beaumont, Texas (1)
- DRC Consultants of New York, New York (1)
- DRMP, Inc. (1)
- Dager, John H. (5)
- Dailey Construction Co. of Wycombe, Pennsylvania (1)
- Dakota Concrete Co. (1)
- Dallas Bridge Co. of Dallas, Texas (1)
- Dallas County (1)
- Dallas Water Co (1)
- Daly & Holbrook (1)
- Damon, Isaac (3)
- Dan Caputo Co. (1)
- Dan Collom & Sons (1)
- Dan Collum & Co. (2)
- Dana, Allston (1)
- Dando, Joseph P. (1)
- Daniel & Webster of Garden Grove, Iowa (2)
- Daniel Deering Construction Co. (1)
- Daniel E. Beasley, P.E. of Columbus, Ohio (1)
- Daniel Jeffery & Sons Inc. of Jeanerette, Louisiana (1)
- Daniel O'Brien (1)
- Daniel O'Connell & Sons of Holyoke, Massachusetts (2)
- Daniel Oatman (1)
- Daniel Woods (1)
- Daniels, Joseph J. (27)
- Darby Laydon & Co. of San Francisco, California (1)
- Darin and Armstrong (1)
- Darling, W.L. (1)
- Darragh, Edward (1)
- Daugherty, George (1)
- Dauphin County (1)
- Davenport, J.T. (1)
- Davenport, Joseph (2)
- David Evans & Associates of Portland, Oregon (3)
- David Shriver, Jr. (1)
- David Snively Stoner (1)
- David, Bigelow, and Stratton (1)
- Davidson, John (1)
- Davidson, W. C. (1)
- Davie Shipbuilding of Lauzon, Québec, Canada (1)
- Davis Construction Co. of Boonville, Missouri (3)
- Davis Construction Inc. of Lansing, Michigan (3)
- Davis, Benjamin H. of New York City, New York (5)
- Davis, C.E. (2)
- Davis, Charles (5)
- Davis, Charles S. (1)
- Davis, Grant (1)
- Davis, N.M. (2)
- Davis, Webster (1)
- Davis-Heller-Pearce Co. of Stockton, California (2)
- Davison, C. B. (1)
- Dawes & Norris (1)
- Dawson Bridge Co. (1)
- Dawson, G.K. (1)
- Dawson, Symmes & Usher (1)
- Day Laborers (7)
- Dayton & Western Turnpike Co. (1)
- DeLong Corporation (1)
- DeLong's Inc. Jefferson City Mo., Fabricator (1)
- DeLong, W. (1)
- DeWaart and Son (1)
- Dean & Westbrook of New York, New York (34)
- Dean and Westbrook (1)
- Dean, John of Chicago, Illinois (1)
- Debolt Construction Co. (1)
- Decatur Bridge Co. of Decatur, Illinois (25)
- Decatur Iron & Steel Co. (1)
- Decker & Hague (1)
- Decker, A. S. (1)
- Decker, John (1)
- Deering & Davidson of St. Louis, Missouri (4)
- Deering, E.W. (1)
- Del Valle Group of Toa Baja, Puerto Rico (2)
- DelaCruz, Angelito (1)
- Delafield, Capt. Richard (1)
- Delano, George H. (1)
- Delaware Bridge & Iron Co. (1)
- Delaware Bridge Co. (3)
- Delaware Construction Co. of Wilmington, Delaware (2)
- Delaware River Bay Authority (2)
- Delaware River Joint Toll Bridge Commission (1)
- Delaware River Port Authority (4)
- Delaware State Highway Department (1)
- Delaware-Vianini-Memco Corp. (1)
- Delay, Patrick J. (4)
- Delgado, Cecilio (1)
- Delta Contracting Co. of Escabana, Michigan (1)
- Denithorne Bros. (1)
- Denman, Walter M. (1)
- Denton Construction Co. (1)
- Denton and Johnson (1)
- Denver Bridge Co. (1)
- Denver Steel Iron Works of Denver, Colorado (1)
- Department of Highways (1)
- Des Moines Asphalt Paving Co. (2)
- Des Moines Bridge & Iron Co./Works of Des Moines, Iowa (11)
- Des Moines Steel Co. of Des Moines, Iowa (12)
- Desmond & Lord (2)
- Detailing, Upstate (1)
- Deterding, Cha. W. (1)
- Deterding, Chas. W. (1)
- Detroit Bridge & Iron Co. of Detroit, Michigan (2)
- Detroit Bridge & Iron Works of Detroit, Michigan (39)
- Detroit Bridge & Steel Works of River Rouge, Michigan (1)
- Detroit Bridge Co. of Detroit, Michigan (3)
- Detroit Steel & Bridge Co. of River Rouge, Michigan (1)
- Dewart, C.V. (1)
- Dewberry & Davis of Fairfax, Virginia (1)
- Dewberry-Goodkind, Inc. of Fairfax, Virginia (1)
- Deweese, Aden (1)
- Dewey Bros. of Goldsboro, North Carolina (1)
- DiFiore Construction (1)
- Dialogue & Co. of Camden, New Jersey (1)
- Diamond Construction Co. (1)
- Dibley & Robinson of Fargo, North Dakota (2)
- Dibley and Robinson (1)
- Dice, Joseph (14)
- Dick Anderson Construction of Great Falls, Montana (1)
- Dickerson, W. E. (2)
- Dickey & Saxon (1)
- Dickinson, P. P. (1)
- Dickinson, Will of Ridgeway, Pennsylvania (2)
- Dickson, J.B. (1)
- Diescher, Samuel of Budapest, Hungary (1)
- Dietrich, William (1)
- Dildine Bridge & Construction Co. (alternate name for Dildine Bridge Co.)
- Dildine Bridge & Iron Co. (alternate name for Dildine Bridge Co.)
- Dildine Bridge Co. of Cameron, Missouri (52)
- Dilliard, Herbert C. (1)
- Dimensional Innovations of Shawnee Mission, Kansas (1)
- Dingle, Samuel (1)
- Dingle-Clark (1)
- Dise, A.P. (3)
- District of Columbia government (1)
- Dixon, S. M. of Warren, AR (1)
- Dixon, S.M. (2)
- Dobson, George D. of Newell, Iowa (1)
- Dodd & Baldwin of Pennsylvania (1)
- Dodd, Jared (1)
- Dodd, Jerry (3)
- Dodge, Grenville of Danvers, Massachusetts (1)
- Doering, H.E. (2)
- Dolby & Co., A. L. (2)
- Dole, George of Wilmington, Delaware (1)
- Dominion Bridge Co. of Montréal, Québec, Canada (2)
- Don Hall Constructors (2)
- Donahue, James (1)
- Donahue, T.J. of Dubuque, Iowa (1)
- Donald C. Pray (1)
- Donald MacDonald Architects of San Francisco, California (1)
- Donaldson Construction Co. of Skidmore, Missouri (1)
- Donaldson Hampton Evans of Seattle, Washington. (1)
- Doran, Frank of Richmond, Indiana (3)
- Dorr Co. of Denver, Colorado; London, England, United Kingdom; & New York City, New York (1)
- Douglas, E.A. (1)
- Douglas, J.W. (2)
- Douglas, Smith & Co. of Zanesville, Ohio (1)
- Dover & Wood (1)
- Dover Boiler Works (4)
- Dr. B.F. Cory (1)
- Dr. Sena Kumarasena, Ph.D., P.E. (1)
- Drager, John (1)
- Drake & Stratton Co. of New York City, New York & Philadelphia, Pennsylvania (7)
- Drake, W.A. (1)
- Drano Flume & Lumber Co. (1)
- Dravo Contracting Co. of Pittsburgh, Pennsylvania (11)
- Drawbaugh, W. H. (3)
- Drawbaugh, Walter (1)
- Drawbaugh, William H. (2)
- Dreibelbies, Simon (1)
- Dresser, Marshall (2)
- Drew, Frederick E, Jr. (1)
- Drexel Construction Co. (1)
- Driver, C.M. (2)
- Drought, Frank T. (1)
- Dubuque & Wisconsin Bridge Co. (1)
- Dubuque Boat & Boiler Works of Dubuque, Iowa (1)
- Duclos & Co. of Paris, France (4)
- Dudley, H.E. (2)
- Duke, E.R. (1)
- Dulin Construction (1)
- Duluth Rotary Club of Duluth, Minnesota (1)
- Dumbarton Bridge Co. (1)
- Duncan, B.M. (1)
- Duncanson-Harrelson Co. of San Francisco, California (3)
- Dunfee, Belden, Dwyer & Co. (1)
- Dunkelberger, George L. (1)
- Dunleavey Bros Co. (2)
- Dunleith & Dubuque Bridge Co. (1)
- Dunn & Lallande Bros. of Birmingham, Alabama (1)
- Dunn Engineering (1)
- Dunn McCarthy Co. (1)
- Dunn, Clifford A. (1)
- Dunn, Leland & Bros. of Birmingham, Alabama (1)
- Dunning Supply Co. (3)
- Dunsmore, Thomas (1)
- Dunwody, Charles of Roswell, Georgia (1)
- Durfee, Josiah (3)
- Durkee, E. L. (1)
- Duryea, Edwin (1)
- Dwyer & Huntington of Buffalo, New York (1)
- Dyer Brothers (1)
- Dyer, Arthur (1)
- Dywidag Systems International USA Inc. of Bolingbrook, Illinois (1)
- E -- E Bruce Johnson (1)
- E. A. Wood & Co. of Andrews, North Carolina (2)
- E. C. Nolan and Son (1)
- E. C. Sherwin & Son (1)
- E. G. Fike & Son of Tulsa, Oklahoma (2)
- E. Kunert Manufacturing Co. (1)
- E. O. Korsmo Construction Co of Memphis, Tennessee (1)
- E. Pihl & Søn A/S of Kongens Lyngby, Lyngby-Taarbæk, Denmark (3)
- E. Thompson (1)
- E.A. Kramme Co. of Des Moines, Iowa (8)
- E.A. Perkins & Co. (1)
- E.B. & A.L. Stone Co. of Oakland, California (3)
- E.E. & W.E. Philpott (1)
- E.E. Barber Construction Co. (5)
- E.E. Moncla (1)
- E.E. Shaffer (1)
- E.F. Goetz Construction Co. of Chambersburg, Pennsylvania (1)
- E.H Mc Hengry (1)
- E.H. Mayne (1)
- E.H. Stone (1)
- E.J. Albrecht Co. of Chicago, Illinois (2)
- E.J. Cross Co. (1)
- E.L. Kennedy & Sons (2)
- E.L.Kennedy (4)
- E.M. Wichert & Co. of Pittsburgh, Pennsylvania (1)
- E.P. Alsbury and Sons (1)
- E.T. Techtonics of Alum Bank, Pennsylvania (1)
- E.W. Blumenschein of Ames, Iowa (1)
- EEG Europe Etudes Gecti of Nanterre, Île-de-France, France (1)
- ET&L Construction Co. of Stow, Massachusetts (1)
- Eager, E.N. (1)
- Eagle Bridge Inc. of Kitchener, Otario, Canada (1)
- Eagle Iron Works of St. Louis, Missouri (1)
- Earl Bushnell, contractor (1)
- Earle W. Meckley (1)
- Earle, W.C. (1)
- Earth Tech Inc. of Land O' Lakes, Florida (1)
- East St. Louis Bridge Co. of East St. Louis, Illinois (7)
- Eastern Bridge & Structural Co. of Worcester, Massachusetts (2)
- Eastman, C.E. of Des Moines, Iowa (1)
- Eaton & Smith (1)
- Eau Claire Engineering Co. (1)
- Ebbe Construction Co. (2)
- Ecale, Henry (1)
- Eck, Theodore (1)
- Eco-Span Arch Systems of Dayton, Ohio (2)
- Ed B. Mooney, Inc. (1)
- Eddy, A.H. (1)
- Eddy, J.M. (1)
- Edegerton Swartwout, designer (1)
- Edge Moor Bridge Works of Wilmington, Delaware (65)
- Edward A Ramsey (1)
- Edward Buehler Delk (1)
- Edward Clapp Shankland of Pittsburgh, Pennsylvania (1)
- Edward Crebo Construction Co. (1)
- Edward E. Gillen Co. (2)
- Edward J. Varney (1)
- Edward Kraemer & Sons, Inc. of Plain, Wisconsin (14)
- Edward Scully Co. (1)
- Edward Strathmann & Co. (1)
- Edward T Milton (1)
- Edward von Geldern (1)
- Edwards & Symes of London, England, United Kingdom (1)
- Edwards & Walsh Construction Co. of Davenport, Iowa (1)
- Edwards Construction Co. of Tampa, Florida (1)
- Edwards Sheet Metal Works, Inc. (1)
- Edwards, Harlan H. (1)
- Edwards, Llewelyn N. (2)
- Edwards, Llewlyn (1)
- Edwin Dwight Graves (2)
- Edwin Kirtland Morse (1)
- Efnor, H.S. of Newton, Iowa (1)
- Eichler, Alfred (1)
- Eirely, W. H. (1)
- El Paso Bridge & Iron Co. of El Paso, Texas (7)
- Elder Construction Co. of San Antonio, Texas (2)
- Elder, John (1)
- Elder, John L. (1)
- Eldridge, Clark H. (6)
- Elford Construction Co. (1)
- Elkan, M.M. of Macon, Georgia (1)
- Elkhart Bridge & Iron Co. of Elkhart, Indiana (52)
- Elkhart Bridge Co. (4)
- Ellerman & McLain (1)
- Ellet, Charles (1)
- Elliott, John L. (1)
- Elliott, Joseph (1)
- Elliott, Joseph C. of Payson, Illinois (6)
- Ellis & Buswell (1)
- Ellis, Charles A. (2)
- Ellis, R.K. (1)
- Ellis-McGinnis Construction Co. (1)
- Elmira Bridge Co. of Elmira, New York. (4)
- Elmira Bridge Works of Elmira, New York (1)
- Elmo Greer & Sons, Inc. of London, Kentucky (1)
- Elon Steer (1)
- Elting Inc. of Gladstone, Oregon (1)
- Elving, Fritz S. (1)
- Elwell, O.R. (2)
- Elwyn E. Seelye & Co. of New York City, New York (1)
- Emmett M. Williams Construction of Moore, Georgia (1)
- Emmett, J. (1)
- Emory River Lumber Co. (1)
- Empire Bridge Co. of Lexington, Kentucky (4)
- Empire Engineering Corp. of New York City, New York (3)
- Empire State Development Corporation of New York (1)
- Endres, John of Prussia (1)
- Engineer-Carbon Engineering Inc (1)
- Engineers, Lu (1)
- Engineers, Sargent (1)
- Engles Steel Construction Co. (1)
- Enoch Hale (1)
- Enoch, John (1)
- Ensign, G.W. (1)
- Ensminger, Philip (4)
- Enterprise Bridge Co. (1)
- Envirodyne Engineers Inc. of Delaware (1)
- Epperson, Richard (1)
- Eppstein, H.L. (1)
- Erdman Anthony & Associates Inc. of Rochester, New York (1)
- Erdman Anthony, Engineer (1)
- Erdman, Anthony and Associates (1)
- Erhart, Eric E. (2)
- Ericksen, Harry (1)
- Erickson & Petterson of San Francisco, California (2)
- Ericson, John (5)
- Ericson, John E. (1)
- Ericson, R.L. (2)
- Ernst Steel Corporation of Cheektowaga, New York (1)
- Eugene Rollin & Co. of Braine-le-Comte, Belgium (6)
- Evans, Donald H. (2)
- Evans, R. R. (1)
- Evans, Robert R. (1)
- Evans, S. E. of Ft. Smith, Arkansas (1)
- Evarts Blakeslee of Great Falls, Montana (1)
- Evelyn Pierpoint (1)
- Everett (1)
- Everett-Moore of Cleveland, Ohio (1)
- Evrett S Sherman (1)
- Ewell, Mark D. (2)
- Ewig, I. (1)
- Excel Bridge Co. (1)
- Expressway Constructors of Saraland, Alabama (1)
- Eyre Construction Co. of Philadelphia, Pennsylvania (4)
- Eyre, T. L. of Philadelphia, Pennsylvania (1)
- F -- F. A. Moser Construction Co. of Farmersburg, Iowa (2)
- F. D. Diefendorf Co. (1)
- F. Herbert Snow (7)
- F. J. Maurer & Son (1)
- F. S. Brown & Co. of Chicago, Illinois (1)
- F. Stuart Williamson (1)
- F.A Howard (1)
- F.A. Gerig & Co. (1)
- F.C. Balyss (1)
- F.C. O'Reilly & Son of Jersey City, New Jersey (1)
- F.D. Shufflebarger of Phoenix (1)
- F.E. Marsh & Co. of Des Moines, Iowa (7)
- F.E. Ward Inc of Vancouver, Washington (3)
- F.F. Stineman (1)
- F.H. O'Brien and York (1)
- F.K. Ketler Co. of Chicago, Illinois (1)
- F.K. Vaughn Building Co. (1)
- F.M. Talbot Construction Co. of New York City, New York (2)
- F.M. Wagman Co. of York, Pennsylvania (3)
- F.R. Long & Co. of New York City, New York (5)
- F.R. Long - W.G. Broadhurst Co. of Hackensack, New Jersey (1)
- F.S. Harvey (1)
- F.T. O'Dell of Hannibal, Missouri (3)
- F.V. Ragsdale Co (1)
- F.W. Byron Metal Co. (1)
- F.W. Hunter, designing engineer (1)
- F.W. Menke Stone & Lime Co. of Melrose, Illinois (1)
- F.W. Schwiers Jr. Co. of New York City, New York (1)
- FIGG Engineering Group of Tallahassee, Florida (6)
- FINLEY Engineering Group of Tallahassee, Florida (3)
- Fair-Williams Bridge & Manufacturing Co. of Ottumwa, Iowa (6)
- Fairbairn, E.A. (1)
- Fairbairn, Seager (1)
- Fancus Machine Co. (1)
- Fannon, James H. (1)
- Fargo Bridge & Iron Co. of Fargo, North Dakota (20)
- Farley, Jim of Sebring, Ohio (1)
- Farmington Cement Co. of Farmington, Illinois (1)
- Farnam, Henry (1)
- Farnsworth & Blodgett of Kansas City, Missouri (7)
- Farnsworth & Chambers Co. of Houston, Texas (1)
- Farrell Construction Co. of Chicago, Illinois (1)
- Farrell, William P. of St. Paul, Minnesota (1)
- Farris Bridge Co. of Charleston, West Virginia (3)
- Farris Engineering Co. of Pittsburgh, Pennsylvania (10)
- Farwell, M.S. (1)
- Fauntleroy, J. D. (2)
- Fay, Spofford & Thorndike of Burlington, Massachusetts (5)
- Federal Bridge Co. of Des Moines, Iowa (6)
- Federal Bridge Co. of Waukesha, Wisconsin (1)
- Federal Emergency Relief Administration (3)
- Federal Engineering Co. (1)
- Federal Highway Administration (1)
- Federal Works Agency (2)
- Fegles Construction Co. of Minneapolis, Minnesota (1)
- Feldschau, C.F. (1)
- Feldshau and Chaffee (1)
- Felician Slataper-designer (1)
- Fellheimer, Alfred T. (1)
- Ferguson Construction Co. of Rockford, Illinois (2)
- Ferguson and Houston (1)
- Ferguson, Angus (1)
- Ferguson, E. K. (1)
- Ferguson, G.R (1)
- Ferguson, John A. (1)
- Ferguson, William H. (1)
- Ferreo, John (1)
- Ferris, C. E. (1)
- Ferro Concrete Co. of Harrisburg, Pennsylvania (7)
- Ferro Construction Co. of Chicago, Illinois (1)
- Ferry & Clas of Milwaukee, Wisconsin (1)
- Fidelity Construction Co. of Kansas City, Missouri (2)
- Fiedler, H. W. (1)
- Fifield Construction Co. of Waterloo, Iowa (3)
- Fifth Avenue and High Street Bridge Co. (1)
- Figg & Muller Engineering Group of Tallahassee, Florida (4)
- Filbert, Porter & Co. (1)
- Fimple, Ralph W. (1)
- Fink, Albert of Lauterbach, Hesse, Germany (6)
- Fink, Geo (1)
- Fink, Levi (2)
- Finke, Ralph W. of Olympia, Washington (7)
- Finley, John (1)
- Finley, W.H. (1)
- Finley, William H. (1)
- Finney, A. L. (1)
- Firm, Unknown of Dubuque, Iowa (1)
- Fischer, John O. (1)
- Fischetti, David, P.E. (1)
- Fisher Associates (1)
- Fisher Construction Co. of Joliet, Illinois (3)
- Fisher Construction Co. of Norman, Oklahoma (1)
- Fisher Contracting Co. (1)
- Fisher, A. (1)
- Fisher, Carl (1)
- Fisher, Frederick (1)
- Fisher, Oscar (1)
- Fisher, R.F. (1)
- Fisher, Ross, MacDonald, & Kahn (1)
- Fishler, George W. (1)
- Fitz, Rudolph H. of St. Paul, Minnesota (1)
- Fitzgerald, Thomas C. (1)
- Fitzpatrick, L.W. (1)
- Fitzsimons & Connell Co. of Chicago, Illinois (5)
- Fitzsimons & Connell Dredge & Dock Co. of Chicago, Illinois (6)
- Five Shovelmen, The of Sparta, Wisconsin (4)
- Flagler, Henry (19)
- Flander, C.E. (1)
- Flannery, Patrick (1)
- Flasher, Comet (1)
- Flatiron Construction (1)
- Flatiron Corp. of Broomfield, Colorado (3)
- Fleming, J.S. (1)
- Fletcher, Bela of Claremont, New Hampshire (3)
- Flickwir & Bush, Inc. (1)
- Flink, G.A. (4)
- Flinn-Moyer Bridge Co. of Weatherford, Texas (2)
- Flood, J.E. (1)
- Florida Dredging Co. of Jacksonville, Florida (1)
- Florida International University (1)
- Fogleman & Davidson (1)
- Fogleman, W.F. (1)
- Folsom, George F. (4)
- Forbes, Chas A. (1)
- Forces, County (1)
- Forces, State (1)
- Forcum-James Co. of Dyersburg, Tennessee (3)
- Ford, Bacon & Davis of New York City, New York (1)
- Ford, Bacon & Davis Inc. (1)
- Ford, Bacon and Davis (1)
- Ford, F. D. (1)
- Forder, George (1)
- Foreman, John L. of Pottstown, Pennsylvania (4)
- Foreman, W.H. (1)
- Forrester-Swenson Construction Co. of Kansas City, Missouri (1)
- Forsbeck, C.D. (1)
- Forsgren Brothers (3)
- Forsyth, Thomas (1)
- Forsythe, William (1)
- Fort Pitt Bridge Works of Pittsburgh, Pennsylvania (35)
- Fort Smith and Choctaw Bridge Co. (1)
- Foster & Creighton Construction Co. of Nashville, Tennessee (3)
- Foster-Creighton-Gould Co. of Nashville, Tennessee (6)
- Foster-Smetana Co. (1)
- Fought & Co. (1)
- Foundation Co. of New York (11)
- Foutes, Cornelius (1)
- Fowler & Wilson (1)
- Fowler Jones Beers Construction Co. (1)
- Fowler, Fred T. (2)
- Fowler, W.G. (5)
- Fowler, Wm. L. (1)
- Fox & Howard (9)
- Fox Construction Co. (1)
- Fox Redpath Construction Co. (1)
- Fox, H.M. (1)
- Fox, Jacob (1)
- Foy, J.D. of Dothan, Alabama (1)
- Francis J. Palo (1)
- Francisco Fortuño (1)
- Francisco, L.A. (1)
- Frank Lloyd Wright of Richland Center, Wisconsin (2)
- Frank P. Allen Jr. (1)
- Frankfort Construction Co. (2)
- Franklin & Leinhardt of New York City, New York (1)
- Franklin Hiser Wissler (1)
- Frankman Bros. Construction Co. of Milwaukee, Wisconsin (1)
- Frantam, Wayne (1)
- Franz, Joseph (1)
- Fratt, Frederick William (1)
- Frazier, P.L. (2)
- Frazier-Davis Construction Co. (1)
- Frear, Floyd C. (4)
- Fred A. Hannum (1)
- Fred Berry (1)
- Fred M. Clark & Son (1)
- Fred T. Ley Co. of Springfield, Massachusetts (5)
- Frederic A. Nassaux & Assoc. (1)
- Frederick H. Smith & Co. of Baltimore, Mayland (1)
- Frederick Snare, Inc (3)
- Fredericksburg Bridge Co. (1)
- Freeholders 1838 (1)
- Freeland-Roberts & Co. of Nashville, Tennessee (1)
- Freeman, Francis B. (1)
- Freese & Nichols of Fort Worth, Texas (1)
- Freeto, F.H. (1)
- French, Alexis (1)
- French, Uziel H. (1)
- Fretz Construction Co. of Houston, Texas (1)
- Freygang & Trogon of Kansas City, Missouri (1)
- Freyssinet International of Sterling, Virginia (1)
- Friemoth, A.J. (1)
- Fries, Winfield of Greenfield, Indiana (4)
- Fritz-Rumer-Cooke Co. of Columbus, Ohio (2)
- Fritze, Lundt & Co. of San Juan, Puerto Rico (1)
- Fruin-Conlon Contracting Co. of St. Louis, Missouri (1)
- Fry and Kain (1)
- Fry, John W. (1)
- Ft. Wayne Iron Works of Fort Wayne, Indiana (1)
- Fteley, Alphonse (1)
- Fuertes, James H. (1)
- Fuertes, James M. (1)
- Fuller, O.O. of Nevada, Missouri (2)
- Fulton, Joseph (1)
- Fund for North Bennington (1)
- Funk, William (1)
- Furrow, Raymond A. (8)
- G -- G. Edwin Pidcock Co. (1)
- G. H. Scribner Jr. of Chicago, Illinois (2)
- G. M. Thompson (1)
- G. W. Condon Construction Co. of Randolph, Massachusetts (2)
- G. W. Ensign Inc (1)
- G.A. & F.M. Wagman of York, Pennsylvania (5)
- G.E Hungerford of Mt Carroll Illinois (1)
- G.E. Warden Co. (1)
- G.M. Williams (1)
- G.W. & J.V.V. Fisher (1)
- G.W. Eddy Foundry of Waterford, New York (1)
- G.W. James & Co (1)
- GLF Construction Co. of Miami, Florida (1)
- Gagel, Edward (2)
- Gaines Bros. of Oklahoma City, Oklahoma (2)
- Gaines, Yeokum & Mackey of Oklahoma City, Oklahoma (3)
- Galena Construction Co. (1)
- Gallbreath, J.F. (1)
- Gallop, Homer (1)
- Gamble's Inc. of Montgomery, Alabama (1)
- Gannett Fleming, Inc. of Harrisburg, Pennsylvania (1)
- Garbarini, V.F. (1)
- Garber, Frederick W. of Cincinnati, Ohio (1)
- Garcia-Gonzalez, Jose (1)
- Gardner Construction Co. of Glenwood Springs, Colorado (1)
- Garleb, Herman (1)
- Garner, R.D. (1)
- Garnett, B.J. (4)
- Garnett, Sieloy & Fleming of Harrisburg, Pennsylvania (1)
- Garran, Frank (1)
- Garrett, M. L. (1)
- Garver, N.B. (3)
- Garvey, James P. (1)
- Gasner, John (1)
- Gass Brothers (2)
- Gast, E. A. (1)
- Gates, Art (1)
- Gaydon, Tillman (1)
- Gaydon, Tillman J. (1)
- Gaylord Construction Co. (1)
- Geesy, Francis (1)
- Geisel Construction Co. of St. Louis, Missouri (2)
- Gemmer, Wilmer H. (2)
- Gemmill, James R. of Sharpsville, Pennsylvania (2)
- General Asphalt Paving Co. (2)
- General Builders, Inc. of Kalamazoo, Michigan (1)
- General Construction Co. of Federal Way, Washington (13)
- General Construction Co. of Omaha, Nebraska (1)
- General Construction Co. of St. Louis, Missouri (3)
- General Construction Co., Seattle (1)
- General Contracting Co. (1)
- General Contracting Corporation (1)
- Genesee Bridge Co. (1)
- Gentry, Bud (1)
- Geo. Bennett Construction Co. (1)
- George & Faith Hewett (1)
- George & Lynch of Dover, Delaware (2)
- George Cooke & Sons of Minneapolis, Minnesota (2)
- George E. King Bridge Co. of Des Moines, Iowa (28)
- George F.P. Wanger (2)
- George Fillmore Swain (1)
- George H. Crafts Co. of Atlanta, Georgia (2)
- George H. Griffin Inc. (1)
- George Harding (3)
- George M. King Construction Co. of Des Moines, Iowa (1)
- George M. Quigley & Co. (1)
- George Miller (1)
- George Pollock & Co. (1)
- George W. Condon Co. of Omaha, Nebraska (3)
- George W. Drew (1)
- George W. Kelham (1)
- George Wickline of the Texas Highway Department's Bridge Division (1)
- George Woerntz & Son (3)
- George. O. Wagner (1)
- Georgia Appalachian Trail Club (1)
- Georgia State Highway Department (3)
- Georig, A.C. (1)
- Gerald & Michael Waldbillig (1)
- Gerard Knutson Construction Co. of Kansas City, Missouri (4)
- Geraux Bros. Co. (1)
- Gerhard F. Stuewe Co. (1)
- German-American Portland Cement Co. of Hamburg, Germany & LaSalle, Illinois. (4)
- Gerrick & Gerrick Co. of Seattle, Washington. (3)
- Gilbert & Nelson of Chambersburg, Pennsylvania (1)
- Gilbert & Smith of Gettysburg, Pennsylvania (1)
- Gilbert, Cass of Zanesville, Ohio (6)
- Gilbert, Harold E. (1)
- Gilchrist, Gibb of Wills Point, Texas (14)
- Gildersleeve Construction Co. of Napa, California (2)
- Gildersleeve, C. H. of Napa, California (8)
- Gildersleeve, C.H. of Napa, California. (2)
- Giles, Robert (1)
- Gilham, Paul C. (1)
- Gilifillan, C.W. (1)
- Gill, Irving (1)
- Gillette-Herzog Manufacturing Co. of Minneapolis, Minnesota (16)
- Gillham, P.N. (1)
- Gillham, Perely N. (1)
- Gilliland, Jesse (1)
- Gillioz, M.E. of Monett, Missouri (40)
- Gilpin Construction (7)
- Gimrock Construction Inc. of Hialeah, Florida (1)
- Gindley, A.B. (1)
- Githens, J. W. of Poplar Bluff, Missouri (1)
- Glardon, William P. (1)
- Glen Severson Construction Co. (1)
- Glenn O. Hawbaker Inc. of State College, Pennsylvania (1)
- Glessner, Tobias (1)
- Glicken, M.J. (1)
- Glidden, William P. (1)
- Glidden, William R. (2)
- Globe Construction Co. (1)
- Gochanour, Elmer L. of Grandview, Iowa (1)
- Goggin Construction of Arcola Illinois (1)
- Golden Gate Portland Cement Co. of Cement, California (1)
- Golden State Bridge (1)
- Goll, George F. (1)
- Good Roads Commission (2)
- Goodell, Lee (1)
- Gooding, W.J. (1)
- Goodkind, Morris (1)
- Goodwin Brothers Construction Co. (1)
- Goodwin, George E. (1)
- Goodyear, David (4)
- Gordo, Glen M. (1)
- Gordon Construction Co. (1)
- Gordon R. Archibald, Inc. of Pawtucket, Rhode Island (1)
- Gordon, Max (1)
- Gordon, Nathan (1)
- Gordon, William (1)
- Goshorn, W.H. (3)
- Gottemoellar, Frederick of Columbia, Maryland (1)
- Gould Construction Co. of Davenport, Iowa (24)
- Gould Contracting Co. of Nashville, Tennessee (1)
- Gould, Calvin A. (1)
- Gould, Carl F. (1)
- Gould, James H. (1)
- Gover, Frank L. (1)
- Graber Post Buildings of Montgomery, Indiana (1)
- Gradle Brothers (1)
- Grady & Smith (1)
- Graef, Anhalt, Schloemer & Associates of Chicago, Illinois (1)
- Graff Construction Co. of Seattle, Washington and Kansas City, Missouri (1)
- Graff, Bennett & Co. of Pittsburgh, Pennsylvania (1)
- Grafton Cheese Co. (1)
- Gragg Construction Co. of Henryetta, Oklahoma (4)
- Graham & Boals (1)
- Graham Brothers (1)
- Graham, W.O. (2)
- Grainert & Whitman Consulting Engineers of Baltimore, Maryland (1)
- Granger, Sanford of Chesterfield, Cheshire, New Hampshire (4)
- Granite Bridge Co. (1)
- Granite Construction of Watsonville, California (3)
- Granitoid Co. (1)
- Grant Smith & Co. (3)
- Grant, Asher (1)
- Grant, E.R. (1)
- Grant, George J. of St. Paul, Minnesota (1)
- Grant, H.B. (1)
- Graves Construction Co. of Melvin, Iowa (2)
- Gray & Chandler (1)
- Gray, J.H (1)
- Gray, S.R. of Puyallup, Washington (1)
- Great Lakes Dredge & Dock Co. of Oak Brook, Illinois (8)
- Great Lakes Engineering Co. of Detroit, Michigan (1)
- Great Northern Bridge Co. (1)
- Green Construction Co. of Green Bay, Wisconsin (1)
- Greene, Roy L. (4)
- Greenfield Bridge & Sewer Co. (1)
- Greenville Steel & Iron Co. (1)
- Greenville Steel Foundry Co. (1)
- Greenway, O. J. (1)
- Gregg & Stout Bridge Co. of Sheridan, Wyoming (1)
- Gregg, Gibson & Gregg (1)
- Gregg, Jack of Sheridan, Wyoming (1)
- Gregg, John C. (2)
- Greiling Engineering Co. of Green Bay, Wisconsin (1)
- Greiner, James P. (2)
- Griffin, James H. (2)
- Griffith, John (1)
- Griffith, Thomas (2)
- Grimes, E.L. (1)
- Grimm, F. L. (1)
- Grimmett, William (1)
- Grimshaw Construction Co. of Winfield, Iowa (1)
- Gross, William (1)
- Grosshans & Petersen, Inc. of Marysville, Kansas (2)
- Grossman, Leo (5)
- Grosvenor, A.W. (4)
- Grosvenor, A.W. (4)
- Groton Bridge & Manufacturing (1)
- Groton Bridge Co. of Groton, New York (79)
- Grub, Charles E. (1)
- Grubbs, Robert E. (3)
- Guaranty Construction Co. of Minneapolis, Minnesota (2)
- Gudgel & McVey (1)
- Guetzko Construction Ltd. of Manchester, Iowa (1)
- Guidane, A.E. (1)
- Guinard, Louis (1)
- Gulf Bitulithic Co. of Houston, Texas (3)
- Gulf Concrete Construction Co. (1)
- Gumbes, Samuel W. (1)
- Gunn, William of North Carolina (1)
- Guppy, B.W. (1)
- Gurnet Bridge Co. (1)
- Gustaf Widell & Co. of Mankato, Minnesota (6)
- Gustavus Wilhelm Nagle of Hamburg, Germany (1)
- Gutleben Brothers Bridge Co. of San Francisco, California (3)
- Gutleben, C.T. (1)
- Gutleben, Christian T. (5)
- Guy F. Atkinson Co. (2)
- Guy H. James Construction Co. of Oklahoma City, Oklahoma (4)
- H -- H L Hauser Building Co. Inc. (1)
- H. B. Zachry Co. of Laredo, Texas (2)
- H. E. Ahrens & Bros of Reading, Pennsylvania (1)
- H. E. Talbot & Co. (1)
- H. F. Ringeling (1)
- H. Gene McKeown of Council Bluffs (6)
- H. M. Waite (1)
- H. Neuman & Co. of Des Moines, Iowa (2)
- H. O'Neill (1)
- H.A. Boedker of Chicago, Illinois (1)
- H.A. Field (1)
- H.B. Thompson & Co. of Birmingham, Alabama (2)
- H.C. Lallier Construction & Engineering Co. (2)
- H.C. Modlin & Co. (2)
- H.C. Wood & Co. (1)
- H.D. Williar Jr. (1)
- H.E. Bovav Jr. (2)
- H.E. Culbertson Co. of Muskegon Heights, Michigan (1)
- H.E. Stevens (1)
- H.H. Stoddard Co. (1)
- H.J. Forbes & Co. (1)
- H.L. Dresser (1)
- H.L. Maddocks Co. (1)
- H.P. Converse Co. (1)
- H.P. Jones & G.K. Foster of Winterset, Iowa (4)
- H.S Wetherell of Morgan Park Illinois (1)
- H.S. Hopkins & Co. of St. Louis, Missouri (1)
- H.S. Kerbaugh, Inc. (6)
- H.T. Ward Co. of Tecumseh, Nebraska (1)
- H.V. Dwelle (1)
- H.W. Sebastian & Co. of St. Louis, Missouri (3)
- H.W. Tapp Construction (4)
- H2L2 Architecture of Philadelphia, Pennsylvania (1)
- H2L2 Infrastructure (1)
- HDJ Design Group of Vancouver, Washington (1)
- HIPCO of Ligonier, Indiana (1)
- HIPCO of Ligonier, Indiana (1)
- Haarman Steel Co. (1)
- Haase, Mike of St. Joseph, Missouri (4)
- Habluetzel, Jacob (1)
- Hackedorn Construction Co. of Indianapolis, Indiana (2)
- Hackendorn Construction (1)
- Hadley, Homer of Seattle, Washington (7)
- Haffner, Henry (1)
- Hagan-Thibodeau Construction Co. (1)
- Hagedorn Construction Co. (1)
- Haggerty Brothers (1)
- Haggerty, Charles A. (1)
- Hagman, Henry (3)
- Hagney, J.W. (1)
- Haines & Haines (1)
- Halbfass, Frederick Paul Gerhart of La Porte City, Iowa (2)
- Hall, Arthur C. (1)
- Hall, Fred T. (1)
- Hall, Martin (1)
- Haller & Davis (1)
- Halteman, Jonathan L. (1)
- Halter, Alphonse (1)
- Halvardson, Mats O. (4)
- Halverson Construction (1)
- Hamann, Chas H. (1)
- Hamar and Curry (1)
- Hamilton & Chambers Co. of New York City, New York (1)
- Hamilton Construction of Springfield, Oregon (11)
- Hamlin, Homer (1)
- Hammon, Jerry (1)
- Hamp, C.Y. (1)
- Hampton, Colonel Wade (1)
- Hancock, George (1)
- Hancock, James R. of St. Louis, Missouri (3)
- Haney & Ryan (1)
- Hanford, Aven (2)
- Hankins & Collins of Richmond, Virginia (1)
- Hanley, Michael (1)
- Hanley,, Frank J. (1)
- Hanly & Young Structural Engineers of Cincinnati, Ohio (2)
- Hannibal & New London Plank Road & Bridge Co. (1)
- Hannibal Bridge Co. (1)
- Hanover Construction Co. (1)
- Hanrahan Co. (1)
- Hansell Elcock Co. of Chicago, Illinois (1)
- Hansen & Parr Co (1)
- Hanson Professional Services Inc. of Springfield, Illinois (2)
- Hanson, Julius (1)
- Hardaway Co. of Columbus, Georgia (1)
- Hardaway Construction Co. of Columbus, Georgia (1)
- Hardaway Contracting Co. of Columbus, Georgia (2)
- Hardaway, B.H. (1)
- Harder, F.R. (1)
- Hardesty & Hanover of New York, New York (17)
- Hardesty, R.R. (1)
- Hardman, Thomas (1)
- Hargreaves & Lindsay (3)
- Harkness, George (1)
- Harlan, James (1)
- Harman, William (3)
- Harmon Bros. (1)
- Harmon, Henry (1)
- Harold MacQuinn Construction Co. of Hulls Cove, Maine (1)
- Harper & Tweedale (1)
- Harpers Ferry Job Corps (1)
- Harrington & Cortelyou of Kansas City (11)
- Harrington, Howard & Ash of Kansas City, Kansas & New York, New York (21)
- Harrington, J. F. of Missoula, Montana (1)
- Harrington, J. L. of Kansas City, Missouri (1)
- Harris Structural Steel Co. of South Plainfield, New Jersey (9)
- Harris, Lee (2)
- Harris, Melton (1)
- Harris, T. W. (1)
- Harrison & Burrowes Bridge Constructors Inc. (2)
- Harrison & Burton Co. of New York City, New York (5)
- Harrison & Green (1)
- Harry & Charles Ness of Dallastown, Pennsylvania (1)
- Harry K. Ellis (1)
- Harry Leslie Walker of New York City, New York (1)
- Harry, Frank (1)
- Harry, Silas (10)
- Hart Construction Co. of Gerber, California (1)
- Hart Construction Co. of Tacoma, Washington of Tacoma, Washington (3)
- Hart, Charles (1)
- Hart, Richard E. (1)
- Hart, Walter J. (4)
- Hartford & Fugatt of Batesville, Arkansas (1)
- Hartford Accident & Idemnity Co. (1)
- Hartley, Henry (1)
- Hartley, John W. (2)
- Hartman & Co., Inc. of Springfield, Missouri (4)
- Hartman, Jason (1)
- Hartman, Wesley (1)
- Hartmann-Clark Bros. Co of Dwight, Illinois (2)
- Hash, Albert B. (1)
- Hasie, Montague S. of Dallas-Fort Worth, Texas (1)
- Hastings, I.M. (1)
- Hastman, Benjam F. (1)
- Hatch, Mott, McDonald, (1)
- Haupt, Herman of Philadelphia, Pennsylvania (2)
- Havana Bridge Works of Elmira, New York (2)
- Haviland, P. A. (1)
- Hawking, Dude of Burlington, North Carolina (1)
- Hawkins Construction Co. of Omaha, Nebraska (2)
- Hawkins and Armstrong of Seattle, Washington (2)
- Hawkins, E.C. (4)
- Hawkins, Herthel & Burrell of Springfield, Massachusetts (1)
- Hawman, Albert H. (1)
- Hawman, Penrose W. (1)
- Hay, Henry V. (1)
- Hayden, Arthur G. (1)
- Hayden, John (1)
- Hayes, John H. (1)
- Haynes & Box (1)
- Haynes, Collins (1)
- Hayward, Joseph (1)
- Hazelet + Erdal of Chicago, Illinois (12)
- Hazelton, David (1)
- Hazzard Wire Rope Co. (1)
- Heagy, Ira B. (2)
- Healy-Tibbitts Construction Co. (1)
- Hebble, Henry (2)
- Hecker, A.S. (1)
- Hedrick & Cochrane of Kansas City, Missouri (2)
- Hedrick & Kremers (1)
- Hedrick, Ira G. of West Salem, Illinois (7)
- Heintz, O.E. of Portland, Oregon (1)
- Heiss, C. M. (1)
- Helmle., George H. (1)
- Hemberle, Edward (1)
- Hembt, Henry (1)
- Henderlite, Harry (1)
- Henderson, E.B. (4)
- Henderson, William S. (1)
- Hendricks, W.M. (2)
- Hendrix, Charles (1)
- Henkel & Brown of Mason City, Iowa (1)
- Henkel, William of Mason City, Iowa (1)
- Hennepin Bridge Co. of Minneapolis, Minnesota (6)
- Henry & McFee (2)
- Henry A. Hagman (1)
- Henry Bickel Co. (3)
- Henry Clark (1)
- Henry Randolph Holbrook (1)
- Henry Steers, Inc. (2)
- Henry Stephenson (1)
- Henry T.Clarke (1)
- Henry Williams Parkhurst of Chicago, Illinois (4)
- Henryetta Construction Co. of Henryetta, Oklahoma (1)
- Hensel Phelps Construction Co. (3)
- Henszey, Joseph G. (6)
- Henzey (1)
- Hepburn, H.P. (6)
- Herber, Mike (1)
- Herbertson Foundry of Brownsville, Pennsylvania (1)
- Herkoltz and Herchert Construction Co. (1)
- Hernan Behn (1)
- Herr, W. H. (1)
- Hershey, C. M. (1)
- Hersum, Leroy M. (1)
- Hess & Skinner Engr Co (1)
- Hewins, Edmund H. (1)
- Hewitt, F. R. (1)
- Hezlep Sinclair Co. of Cleveland, Ohio (1)
- Hezlep-Seaton Co. of Cleveland, Ohio (1)
- Hiatt, Byron of Creston, Iowa (2)
- Hicks & Holmes (1)
- Hicks & Sons (1)
- Higgins, L. of Des Moines, Iowa (1)
- High Steel Structures, Inc. of Lancaster, Pennsylvania (7)
- Highway Construction Co. (1)
- Highway Iron Products Co. (1)
- Higley, C.W. (1)
- Hildenbrand, William (1)
- Hilgard, K.E. (2)
- Hill Brothers Construction Co. of Falkner, Mississippi (1)
- Hill Construction Co (1)
- Hill, C.R. (1)
- Hill, CH2M of Corvallis, Oregon (2)
- Hillding Costruction Co. (1)
- Hilo, Hawaii (1)
- Hilp, Barrett (1)
- Hilton Bridge Construction Co. of Albany, New York (4)
- Hilton, Charles (2)
- Himes, A.J. (1)
- Hinckley, H. V. (1)
- Hinds & Hodgkins of Watertown, New York (1)
- Hinkle, H. G. (1)
- Hinkley, F. E. (1)
- Hinman Brothers (1)
- Hinshaw, Orris L. (1)
- Hipskin, P. (1)
- Hirons, James A. (1)
- His Brother (1)
- Hites, Sandy (1)
- Hobo Construction Co. of Albion, Pennsylvania (1)
- Hobson, Joseph (2)
- Hocking Valley Bridge Works of Lancaster, Ohio (4)
- Hodge Manufacturing Co. (1)
- Hoff Bros.-Butler Co. of New York City, New York (1)
- Hoffman & Bates (1)
- Hoffman Construction Co. (1)
- Hoffman, F.N. (3)
- Hoffman, F.N. - Designer (1)
- Hoffman, F.R. (1)
- Hoffman, Jean L. (1)
- Hoffman, Lee (1)
- Hoffman, Ralph A. (1)
- Hogan & Humphreys (1)
- Holabird & Root of Chicago, Illinois (1)
- Holbrook, Cabot & Daly Corp. of Boston, Massachusetts (6)
- Holbrook, Cabot & Rollins Corp. of Boston, Massachusetts (6)
- Holcombe, Charles O. (1)
- Holden, C. (1)
- Holland, Clifford (1)
- Hollen, E.J. of Providence, Rhode Island (1)
- Hollerbach & May Co. of Evansville, Indiana (1)
- Holm II (1)
- Holmes Construction Co. (1)
- Holmes, George W. (4)
- Holt, John K. (2)
- Holvik, C.A. of Mason City, Iowa (1)
- Holway, W. R. (1)
- Home Engineering & Construction Co. (2)
- Home Engineering & Contracting Co. (2)
- Homer B. Spaulding (1)
- Homer L. Chastain & Associates of Decatur, Illinois (1)
- Honolulu Iron Works of Honolulu, Hawaiʻi (1)
- Hood, William (4)
- Hooper, Sanford A. of St. Paul, Minnesota (1)
- Hoopes, J. W. (1)
- Hoose & Person Construction Co. of Iron Mountain, Michigan (1)
- Hoosier Bridge (1)
- Hoover & Kinnear of Columbus, Ohio (3)
- Hoover, J.W. (1)
- Hoover-Ryan Co. of Pottstown, Pennsylvania (1)
- Hopkins & Co. (1)
- Hopper, J. W. of Oklahoma City, Oklahoma (4)
- Hopson, Alvah (1)
- Horace Peaslee (1)
- Horatio Potter (1)
- Horn, John (1)
- Horn, Willis B. (3)
- Hornbostel, Henry (1)
- Hornby, John (1)
- Horner, George of Iowa City, Iowa (1)
- Horseheads Bridge Co. of Horseheads, New York (9)
- Horton Concrete Construction Co. (1)
- Horton, C. Q. of Austin, Texas (3)
- Horton, Charles (9)
- Horton, Charles K. of Houston, Texas (2)
- Horton, Chas. K. of Houston, Texas (1)
- Horton, Horace B. of Chicago, Illinois (1)
- Horton, Horace E. of Rochester, Minnesota (12)
- Horton, O. H. of Colfax, Washington (1)
- Horton, Timothy (1)
- Hosmer, C.I. (1)
- Houston Structural Steel Co. of Houston, Texas (3)
- Howard & Caudwell (1)
- Howard Shipyard Co. of Jeffersonville, Indiana (1)
- Howard, Needles, Tammen & Bergendoff Corporation of Kansas City, Kansas (28)
- Howe & Wise (1)
- Howe, Malverd A. (1)
- Hsu, Ruchu (1)
- Hubbard, Henry (1)
- Huber, Charles G. of Seattle, Washington (12)
- Huber, George G. (1)
- Huddleston & Driver, Inc (1)
- Hudson & Watson (1)
- Hudson Bridge Works (1)
- Hudson River Bridge Co. (1)
- Hudson, Clarence W. of New York City, New York (4)
- Hudson, Robert (1)
- Huffine, Charles (1)
- Hugh Davey & Son (1)
- Hughes & Easton of Council Bluffs, Iowa (1)
- Hughes, Edward (1)
- Hughes, F. D. of Dallas, Texas (11)
- Hughes, R. K. (1)
- Hughes, William M. of Chicago, Illinois (6)
- Hugill,Asa S. (1)
- Hull, Charles H. (1)
- Hull, Tom (1)
- Hull-Oaks Lumber Co. (1)
- Humber, Jason (1)
- Humboldt Bridge Co. of Humboldt, Kansas (1)
- Hunley & Henry of Hoquiam, Washington (1)
- Hunley, J.B. (1)
- Hunter Contracting Co. of Gilbert, Arizona (1)
- Hunter, A. (1)
- Hunter, Matthew (1)
- Huntingdon County (1)
- Huntington County commissioners (1)
- Huntington, D. R. (1)
- Hurley-Manson & Co. (1)
- Hurst & Sweet (1)
- Hussey, Clarence (1)
- Husted Family (1)
- Huston and Cleveland of Columbus, Ohio (1)
- Hutchinson & Shipman (1)
- Hutchinson Construction Co. (1)
- Hutchinson, J.D. of Troy, New York (1)
- Hutchinson, John of Troy, New York (3)
- Hutte & Foley of Pittsburgh, Pennsylvania (1)
- Hyde Construction Co. of Mississippi (1)
- I -- I. P. Bartley & Co. of Bartley, New Jersey (3)
- I.E. Smith Construction (3)
- I.J. Smith & Co. (1)
- I.M. Ludington Sons, Inc. of Rochester, New York (2)
- I.R.Leap (1)
- IBI Group Inc. of Toronto, Ontario, Canada (1)
- INDOT (1)
- INDOT Designer (1)
- Ide, Paul (3)
- Illeman, J.H. (1)
- Illinois & St. Louis Bridge Co. (1)
- Illinois Bridge & Iron Co. of Sullivan, Illinois (5)
- Illinois Bridge Co. of Chicago, Illinois (5)
- Illinois Highway Department (1)
- Illinois River Bridge Co. (1)
- Illinois Steel Bridge Co. of Jacksonville, Illinois (72)
- Illinois Steel Co. of Chicago, Illinois (29)
- Imbach-Wozny-McCoy, Inc. of Baltimore, Maryland (1)
- Inc, HDR of Omaha, Nebaraska (4)
- Incat of Hobart, Tasmania, Commonwealth of Australia (1)
- Independent Bridge Co. (2)
- Indiana Bridge Co. of Muncie, Indiana (120)
- Indiana Bridge Co. of Indianapolis (2)
- Indiana Department of Highways (10)
- Indiana Department of Transportation (5)
- Indiana Dept. of Transportation (1)
- Indiana Highway Commission (2)
- Indiana Highway Department (2)
- Indiana State Highway Commission (50)
- Indiana State Highway Department (5)
- Indianapolis Bridge Co. of Indianapolis, Indiana (17)
- Industrial Construction Co. of Minneapolis, Minnesota (4)
- Industrial Contracting Co. of Minneapolis (1)
- Industrial Engineering Co. of Minneapolis, Minnesota (1)
- Industrial Steel Construction Inc of Gary, Indiana (1)
- Ingalls Iron Works of Birmingham, Alabama (3)
- Ingersoll, C. M. (4)
- Ingham, William V. (1)
- Inland Steel Co. of East Chicago, Indiana (16)
- Inman, John (1)
- Inmates of Lorton Reformatory (1)
- Interbeton, Inc. of Rockland, Massachusetts (1)
- International Contract Co. (1)
- International Steel & Iron Co. of Evansville, Indiana (2)
- Interstate Bridge Co. of Kansas City, Missouri (8)
- Interstate Power Co. (1)
- Iowa Bridge & Culvert LLC of Washington, Iowa (2)
- Iowa Bridge Co. of Des Moines, Iowa (58)
- Iowa Department of Transportation of Ames, Iowa (4)
- Iowa State Highway Commission of Ames, Iowa (773)
- Iowa State Penitentiary Convicts of Ft. Madison, Iowa (3)
- Iowa State University Bridge Engineering Center of Ames, Iowa (4)
- Iowa Youth Conservation Corps (1)
- Irelan, William A. (1)
- Ireland, W. E. (1)
- Ireland, W.E. (1)
- Iron City Bridge Works of McKees Rocks, Pennsylvania (1)
- Irving, George (1)
- Irwin, William A. (1)
- Isaac "Ike" Stewart (1)
- Isaac Meharry (1)
- Isaacs, John D. (1)
- Isbell Construction Co. of Reno, Nevada (1)
- Israel Brothers Construction Co. (1)
- Ivey's Construction, Inc. of Merritt Island, Florida (1)
- J -- J & J Napier of St. Paul, Minnesota (1)
- J & S Construction of Spokane, Washington (1)
- J W Buchanan (1)
- J. A. Bader Co. of Wilmington, Delaware (1)
- J. A. Ballentine Sr. of Seabrook, Texas (1)
- J. A. Gaboury & Son of Jacksonville, Alabama (1)
- J. A. McEachern Co. (1)
- J. B. Klein Iron & Foundry Co. of Oklahoma City, Oklahoma (5)
- J. B. Whitcomb Construction Co. (1)
- J. B. White and Sons (1)
- J. Charles Thonney of Dixie, Washington (1)
- J. D. Eckman Construction Co. of Atglen, Pennsylvania (1)
- J. E. Cashman Inc. of Burlington, Vermont (6)
- J. E. Greiner Co. of Baltimore, Maryland & Chicago, Illinois (17)
- J. Elmer Nelson (2)
- J. F. Brown (1)
- J. F. Shea Co.,Inc. of Walnut, California (3)
- J. G. Donovan & Son of Los Angeles, California (1)
- J. G. White Co. (16)
- J. H. Scruggins Construction Co. (1)
- J. Howard Poe (1)
- J. Howard, Inc. of Chicago, Illinois (1)
- J. K. Hilton (1)
- J. K. Miller & Co. of Steubenville, Ohio (1)
- J. M. Heiskell (1)
- J. Marshall Young (1)
- J. Miller Eschelman (2)
- J. Moore, T. Sandford, H. Nichols (1)
- J. P. Miller & Co. (1)
- J. Rassmussen and Sons Co. (1)
- J. Rich Steers, Inc (1)
- J. Waldo Ellis (2)
- J.A. Tobin Construction Co (2)
- J.A. Watkins (1)
- J.A.Crosbie (2)
- J.B Allen & Co. (1)
- J.B. & J.M. Cornell Co. of Cold Spring, New York & New York, New York (5)
- J.B. & W.W. Cornell (1)
- J.B. McClain (1)
- J.B. Tremblay (1)
- J.B. Watkins & Co. of South Omaha, Nebraska (1)
- J.C. Ault Construction (1)
- J.C. Bealer, Elmer of Cedar Valley, Iowa (9)
- J.C. Elois Construction Co. (1)
- J.C. Jones (1)
- J.C. Ragusa, Jr. (1)
- J.D. Torr & Co. (1)
- J.E Greiner (1)
- J.E. FitzGerald Construction Co. of New London, Connecticut (1)
- J.E. Jayne & Son Bridge Co. of Iowa City, Iowa (10)
- J.E. Latta Construction (1)
- J.E. Moss Iron Works of Wheeling, West Virginia (1)
- J.E. Nye (1)
- J.E. Williams of Vevay (2)
- J.E.Starbuck (1)
- J.F. Fitzgerald Co. (1)
- J.F. Leonard- Chief Engineer (1)
- J.F. Wayland Bridge Co. (1)
- J.G. Wagner Co. of Milwaukee, Wisconsin (1)
- J.H. Burghardt & Co. (1)
- J.H. Cofrode & Co. of Philadelphia, Pennsylvania (2)
- J.H. Forbes & Co. of Caldwell, Idaho (4)
- J.H. Murray & Co. (2)
- J.H. Richardson Co. of Houston, Texas (1)
- J.H. Ryan and Sons, Inc. of Albuquerque (1)
- J.H. Sparks of St. Joseph, Missouri (12)
- J.I. & E.J. Foster Bridge Builders (1)
- J.J. Daniels (4)
- J.J.McHenry (1)
- J.L. Van Fossen (2)
- J.L.Kennedy (1)
- J.M. "Pink" Hunt (2)
- J.M. Francesca & Co. of Fayetteville, West Virginia (2)
- J.M. Hickman Co. (1)
- J.M.Larish (1)
- J.P. Olds (1)
- J.P. Reiter Construction Co. (1)
- J.P. Sicard Inc. (1)
- J.P. Van Fossen (1)
- J.R Rablin (2)
- J.R. Fitzgerald Co. (1)
- J.R. Sheely & Co. of Des Moines, Iowa (1)
- J.R. Wood & Co. of Seattle, Washington. (2)
- J.R.Gates (1)
- J.S. Cox (1)
- J.S. Culver Stone Co. (1)
- J.S. Langthorn (1)
- J.S. McCleary & Sons (2)
- J.S. Paterson Construction Co. (1)
- J.S. Vance & Son of Parsons, Kansas (7)
- J.Thompson, David (1)
- J.W. Hardison Co. (1)
- J.W. Matthews & Co. (1)
- J.W. Stagg (1)
- JAL Construction (1)
- JCF Bridge & Concrete of Driftwood, Texas (1)
- JL Patterson & Associates, Inc. (1)
- Jaap, George (1)
- Jackson Construction Co. of Nevada, Iowa (1)
- Jackson County Road & Bridge Crew (1)
- Jackson, George W. of Chicago, Illinois (1)
- Jackson, U.G. (1)
- Jackson, William (2)
- Jacob Berry Jr. (1)
- Jacob Wrey Mould of Chislehurst, Kent, England, United Kingdom (1)
- Jacobs & Ober (1)
- Jacobs Engineering Group of Pasadena, California (2)
- Jacobs, Charles M. of New York City, New York (3)
- Jacobsen-Jenson Co. (1)
- Jacobus & Winging Concrete Construction Co. (2)
- Jacon Wrey Mould (1)
- Jaicks Brothers (1)
- James B. Diver Bridge Co. of Keokuk, Iowa (11)
- James Barney Marsh of North Lake, Wisconsin (9)
- James Buchanan Eads of Lawrenceburg, Indiana (1)
- James Construction Co. (2)
- James F Lee Paving Co. of Dubuque, Iowa (2)
- James F. Tasker (1)
- James Finley (1)
- James Hamilton & Co. of Pickaway, Ohio (1)
- James J. Burke & Co. of Salt Lake City, Utah (4)
- James Laurie of Bellsquarry, West Lothian, Scotland, United Kingdom (1)
- James Madison Porter III (1)
- James Madison Taylor (1)
- James McGraw Co. of Philadelphia, Pennsylvania (5)
- James McHugh Construction Co. of Chicago, Illinois (2)
- James O'Connor & Son (1)
- James O. Heyworth, Inc. of Lake Forest, Illinois (1)
- James Otis Follett of Jamaica, Vermont (4)
- James Price of Hebron (1)
- James Renwick Jr. (1)
- James Wordlaw Legg (1)
- James and E. Appleton (1)
- James, Claude L. (1)
- Jamison, Robert (1)
- Janke, Harold B. (1)
- Janni, Alfredo C. (1)
- Janse Bros., Boomer, Crain & Howe Construction of Detroit, Michigan (1)
- Janssen, Benno of St. Louis, Missouri (1)
- Jardine & Anderson (1)
- Jarrell, E.G. of Muncie, Indiana (2)
- Jasper Construction Co. (1)
- Jefferson P. Van Fossen (1)
- Jeffery, J. G. (5)
- Jenkins & Elton (1)
- Jenkins & Wells (1)
- Jenkins, Alan (1)
- Jenkins, Anson (1)
- Jenkins, M. A. (2)
- Jenks, W.G. (1)
- Jensen Construction Co. of Des Moines, Iowa & Sand Springs, Oklahoma (17)
- Jensen, Jens of Dybbøl, Sønderjylland, Denmark (6)
- Jervis, John B. (2)
- Jewett Brothers (4)
- Jiří Stráský of Brno, South Moravia, Czech Republic (5)
- Jim Bowman Construction Co. of Plano, Texas (1)
- Jno. Gilligan Construction Co. of Falls City, Nebraska (1)
- Job, Samson & Solomon Fudge (1)
- Jobson-Gifford Co. (1)
- Jobst, J. J. (1)
- Joe Wood of Seattle, Washington (1)
- Johannesson, Sigvald (1)
- John A. Foley Co. (1)
- John A. Roebling's Sons Co. of Roebling, New Jersey (15)
- John Alexander Low Waddell-designer (1)
- John Aloysius Green of Stone City, Iowa (2)
- John Arthur Elliott (1)
- John Baptiste Richard (1)
- John Beattle of Stony Creek (1)
- John Bilger (1)
- John C. O'Connor (1)
- John Cashman & Sons (1)
- John D. Rockefeller, Jr. (1)
- John Denithorne & Sons of Phoenixville, Pennsylvania (6)
- John Dildine & Co. (1)
- John Dunbar (1)
- John Duncan Forsythe (1)
- John E. Fitzgerald (1)
- John F. Beasley Co. of Muskogee, Oklahoma (3)
- John F. Beasley Construction Co. (1)
- John F. Casey Co. of Pittsburgh, Pennsylvania (3)
- John F. O'Rourke (1)
- John Frank Stevens (2)
- John Galen Howard (1)
- John Gilligan Bridge Co. of Fall City, Nebraska (5)
- John Giorgetti (1)
- John Goll & Co. of Philadelphia, Pennsylvania (1)
- John H Moon & Sons (1)
- John Hampshire & Co. (1)
- John J. O'Heron & Co. of Chicago, Illinois (1)
- John Johnson Construction Co. of Buffalo, New York (2)
- John M Pittenturf (1)
- John Maguire of Mahanoy City, Pennsylvania (1)
- John Marsh Co. of Chicago, Illinois (1)
- John R. Dover (1)
- John R. Price & Bros. (1)
- John Rutter & Son (1)
- John Shields Construction Co. (1)
- John Shriner Jr. (1)
- John Smolen Engineering Co. of Jefferson, Ohio (3)
- John Strona & Sons of Los Angeles, California & Philadelphia, Pennsylvania (1)
- John T Leslie (1)
- John W. Vierck of Menomonee Falls, Wisconsin (1)
- John Wheeler Construction Co. of Geneva, Illinois (2)
- John William Baughman (2)
- John Williams Storrs (10)
- Johns Riddle Sons & Co. (1)
- Johnson Architecture & Planning, LLC of Seattle, Washington (1)
- Johnson Bros. Corp. of Litchfield, Minnesota (2)
- Johnson Brothers Construction (1)
- Johnson City Foundry & Machine Co. of Johnson City, Tennessee (1)
- Johnson Construction Co. of Minneapolis, Minnesota (1)
- Johnson, A.F. of Lockridge, Iowa (1)
- Johnson, C.S. of St. Louis, Missouri (1)
- Johnson, Douglas E. (1)
- Johnson, E.C. of Ca rrollton, Missouri (1)
- Johnson, Frank M. (1)
- Johnson, G. L. (1)
- Johnson, J. F. (3)
- Johnson, J.M. (2)
- Johnson, Joseph G. (1)
- Johnson, L.H. (3)
- Johnson, Lawrence (1)
- Johnson, W.C. (5)
- Johnston & ??? Bridge Builders of Chicago, Illinois (1)
- Johnston, J.F. (1)
- Johnston-Campanella & Co (1)
- Joliet Bridge & Construction Co. of Joliet, Illinois (1)
- Joliet Bridge & Iron Co. of Joliet, Illinois (33)
- Jonas Erb Co. (1)
- Jonathan Parker Snow (4)
- Jones & Bunzendahl (2)
- Jones & Laughlin Steel Co. of Pittsburgh, Pennsylvania & Woodlawn, Pennsylvania (22)
- Jones & Murray (1)
- Jones & Thorne of Baltimore, Maryland (1)
- Jones Brothers Structural Steel Co. (1)
- Jones, Benton of Winterset, Iowa (2)
- Jones, Dolph of Tacoma, Washington (1)
- Jones, George E. (1)
- Jones, Howard M. (1)
- Jones, L.B. (1)
- Jones, T. E. (1)
- Jordan, Arthur (4)
- Jos.Klein (1)
- Jose Maria Sainz y Ramirez of Spain (1)
- Jose de Echevarria (1)
- Joseph Gordon McKenzie (3)
- Joseph Ross & Sons of Boston, Massachusetts (1)
- Joseph Walker Barnwell of Charleston, South Carolina (1)
- Joshua Lafayette Mitchell of Loganville, Georgia (1)
- Josiah Durfee & Co. (2)
- José Rodriguez Lopez (1)
- José Roque-Paniagua of San Juan, Puerto Rico (1)
- Jowett, J.A. of Nashville, Tennessee (1)
- Joyce Brothers Construction Co. of Springfield, Illinois (1)
- Joyce, James A. (1)
- Jozo Lozovina-Mosor Shipyard of Mali Lošinj, Primorje-Gorski Kotar, Lošinj, Yugoslavia (Now Croatia) (1)
- Judah, Theodore (1)
- Judson Manufacturing Co. of San Francisco, California. (4)
- Judson Pacific Co. of San Francisco, California (4)
- Judson Pacific Murphy Corp of Emeryville, California (4)
- Julius Pfaff (2)
- Julius Schaub (1)
- Jutton-Kelly Co. of Dearborn, Michigan (1)
- K -- K & L Rebar of Tukwila, Washington (1)
- KPFF Consulting Engineers of Seattle, Washington (3)
- KWH Constructors of Burnaby, British Columbia, Canada (1)
- Kadane Construction Co. (1)
- Kadrmas, Lee & Jackson, Inc. of Bismarck, North Dakota (1)
- Kahman-McMurray Co. of Kansas City, Missouri (1)
- Kaiser Industries (1)
- Kalogridis Contracting of North Brunswick, New Jersey (1)
- Kampeter, Joseph (1)
- Kane, J.A. of Charlotte, Iowa (1)
- Kansas City Bridge & Iron Co. of Kansas City, Missouri (17)
- Kansas City Bridge Co. of Kansas City, Missouri (130)
- Kansas City Structural Steel Co. of Kansas City, Missouri (8)
- Kansas City and Memphis Railway and Bridge Co. (1)
- Kashow, Israel (1)
- Kasier Steel Corp. (1)
- Kaspari, Robert (1)
- Kast, Gerald (1)
- Kast, Jerry (1)
- Katenbach, Albert B. (1)
- Katz Craig Construction Co. of Omaha, Nebraska (1)
- Kauffman, Paul D. of Reading, Pennsylvania (3)
- Kaufman, Gustave (1)
- Keefe, David A. (2)
- Keefer, George W. (1)
- Keefer, Peter (1)
- Keefer, W. W. (1)
- Keefers & Wyncoop (1)
- Keeler, Elmer (1)
- Keep, George F. (2)
- Keepers & Riddle Co. (1)
- Keepers & Thatcher (2)
- Keffer, George W. (1)
- Keim Cement Co. of Tecumseh, Nebraska (1)
- Keith, D.F. (1)
- Keith, H.C. (1)
- Keliher Construction Co. of Dallas, Texas/Little Rock, Arkansas (4)
- Kellam, David (1)
- Kelleer & Slipher (1)
- Keller & Harrington of Chicago, Illinois (11)
- Keller, Adam (1)
- Keller, John (1)
- Keller, John F. (1)
- Kelley, William (1)
- Kellner Jetties Co. (1)
- Kellog Brothers Co. (1)
- Kellogg & Maurice Bridge Co. of Athens, Pennsylvania (5)
- Kellogg Bridge Co. of Buffalo, New York (4)
- Kellogg, Robert N. (1)
- Kelly & Underwood of Granby, Missouri (6)
- Kelly, C.J. (1)
- Kelly, F. E. (1)
- Kelly-Atkinson Construction Co. of Chicago, Illinois (15)
- Kelsall, George of St. Louis, Missouri (1)
- Ken & Evan Sigfridson (1)
- Kendall, Charles H. (1)
- Kennedy Brothers (7)
- Kennedy, A.M.(Archibald) (1)
- Kennedy, E.L. (2)
- Kennedy, E.O. (1)
- Kennedy, P.J. (1)
- Kennedy, W.H. (1)
- Kenny, Jabez (1)
- Kent, C.R (1)
- Kentucky Highway Commission (1)
- Kentucky State Highway Department (1)
- Kenwood Bridge Co. of Chicago, Illinois (2)
- Keokuk & Hamilton Bridge Co. (1)
- Kerch, C.V. (1)
- Kern & Kibbe (1)
- Kern, A.D. (2)
- Kern, Sheffier and Co. (1)
- Kerr, J.A. (1)
- Kesler, L.C. (1)
- Kessing-Thompson Contractors of Greensburg (1)
- Kessler, F. D. (1)
- Kessler, George (1)
- Kessler, George E. (2)
- Ketchum, Mark (1)
- Ketler-Elliot Erection Co. of Chicago, Illinois (12)
- Keys & Searight (1)
- Keys, James of Omaha, Nebraska (8)
- Keystone Bridge Co. of Pittsburgh, Pennsylvania (61)
- Keystone State Construction Co. (1)
- Kidwell, J.S. (2)
- Kidwell, Josiah (1)
- Kiefer, A. L. (1)
- Kiefer, Anton of Germany (1)
- Kiefer, Arthur L. (1)
- Kiewit Corporation of Omaha, Nebraska (12)
- Kile, A.H. of Muscatine, Iowa (1)
- Killmar, J.H. of Des Moines, Iowa (1)
- Kilpatrick Brothers & Collins Contracting Co. of Beatrice, Nebraska (9)
- Kimball, George A. (1)
- Kimballton Construction Co. (1)
- King & Co. of Cleveland, Ohio (1)
- King & Twiss of Des Moines, Iowa (3)
- King Bridge Co. of Cleveland, Ohio (326)
- King Brothers (1)
- King Construction Inc. (1)
- King Iron Bridge & Manufacturing Co. (alternate name for King Bridge Co.)
- King Iron Bridge Co. (alternate name for King Bridge Co.)
- King, David W. (1)
- King, EEW of McComb, Mississippi (1)
- King, F.E. (1)
- King, Horace of Chesterfield County, South Carolina (9)
- King, J.S. (1)
- King, James (1)
- King, Robert H. (1)
- King, Robert H. (1)
- King, W.B. (1)
- King, W.F. (1)
- King, Washington W. (3)
- King? (5)
- Kingman, Lewis (1)
- Kingsbury & Stone (1)
- Kingsley, Capt. Pelig (1)
- Kingsley, Lyman (1)
- Kingsley, Paul of Strawberry Point, Iowa (3)
- Kinney, E.C. of Green River, Wyoming (1)
- Kinsley Construction Inc. of York, Pennsylvania (1)
- Kirchner Construction Co. (1)
- Kirk, Raleigh, & Co. of Syracuse, New York (1)
- Kirkham, Michael & Associates of Omaha, Nebraska (1)
- Kirkwood, James P. (3)
- Kirsch, C.H. (1)
- Kisker, Isaac (1)
- Kitch, Davis (2)
- Kittridge Bridge Co. of Concord, NH (2)
- Klapp, Eug (2)
- Klatt, Oscar (2)
- Klausmann, H. W. (1)
- Klausmann, H.W. (1)
- Klaussman, Henry W. (1)
- Klein Brothers Construction Co. (1)
- Klein, Fred L. (2)
- Kleven, O. H. of Elk Mound, Wisconsin (1)
- Kleven, O.H. (4)
- Klug & Smith of Milwaukee, Wisconsin (1)
- Klug and Smith Co. (1)
- Knapp, J.P. (1)
- Knauer, Morris (1)
- Kneass, Samuel H. (1)
- Kneass, Strickland of Philadelphia, Pennsylvania (1)
- Knife River Corporation of Bismarck, North Dakota (1)
- Knox County Good Roads Commission (1)
- Knox, Jean H. (4)
- Knutson, Otto K. (1)
- Knutson, Otto W. of Kansas City, Missouri (6)
- Koch, O. L. of Thayer, Missouri (1)
- Kochtitzky & Johnson, Inc. of Forrest City, Arkansas (1)
- Kocktitsky, Oscar of England, Arkansas (1)
- Koehler Construction Co. (1)
- Kohen Iron Works Co. of Detroit, Michigan (1)
- Kohmann & McMurry of Kansas City, Missouri (1)
- Koken Iron Works (1)
- Kokosing Construction Co., Inc. of Westerville, Ohio (2)
- Korea Institute of Civil Engineering & Building Technology of Goyang, Gyeonggi-do, South Korea (1)
- Kornemann Bros. of Muscatine, Iowa (1)
- Korshoj Construction Co. of Blair, Nebraska (1)
- Koru, B. (1)
- Koski Construction Co. of Ashtabula, Ohio (1)
- Koss Construction Co. of Des Moines, Iowa (17)
- Kostenbauder, Jacob (1)
- Kramer Gehlen & Associates (2)
- Kraus, Henry S. (1)
- Kreis Contracting Co. of Knoxville, Tennessee (2)
- Kress, Joseph (1)
- Krieg, Edward (1)
- Kristoffer Olsen Oustad of Romedal Parish, Norway. (3)
- Krohn, B.M. (1)
- Krome, William (3)
- Kronenberger, Thomas J. (1)
- Krug & Son of Baltimore, Maryland (1)
- Kuckenberg & Wittman of Portland, Oregon (9)
- Kuert Contracting Co. of Indianapolis, Indiana (1)
- Kuhn, Vernon (1)
- Kuphal, Henry E. (1)
- Kutte, Colonel Walter (1)
- Kuyes and Work (1)
- Kyle, Charles A. of Canada (3)
- L -- L & K Contracting Co., Inc. (1)
- L. A. Young Construction Co. (1)
- L. B. Foster Co. of New York (1)
- L. F. G. Bouscaren (1)
- L. H. Lacy Co. of Dallas, Texas (1)
- L. K. Sherman & Co. of Chicago, Illinois (1)
- L. Romano Engineering Co. (1)
- L. Starrick (1)
- L. W. Hancock Co. (1)
- L.A. Woods Construction Co. (1)
- L.C. Lashmet Co. (3)
- L.C. Smallwood Contracting (1)
- L.E. Roys (1)
- L.F. Kittridge & Son of Lowell, Massachusetts (1)
- L.G. Arnold Inc. of Eau Claire, Wisconsin (1)
- L.H. Focht & Sons of Reading, Pennsylvania (2)
- L.M. Feller Construction of Rochester, Minnesota (2)
- L.N. Roney (1)
- L.O. Hopkins & Sons of Nashville, Tennessee (9)
- L.O. Kennedy of Walla Walla, Washington (3)
- L.P. Santy Co. (1)
- L.V. Hites Construction Co. (1)
- LL Brown Construction Co. (1)
- La Crosse Bridge & Steel Co. (9)
- Lackawanna Bridge Co. of Buffalo, New York (7)
- Lackawanna Steel Co. of Lackawanna, New York (17)
- Lackey, Oscar F. of Baltimore, Maryland (1)
- Laclede Steel Co. of Madison, Illinois (1)
- Ladd Construction of Redding, California (2)
- Lafarge Canada Inc. of Calgary, Alberta, Canada & Mississauga, Ontario, Canada (2)
- Lafayette Bridge Co. of Lafayette, Indiana (65)
- Lafayette Engineering Co. of Lafayette, Indiana (17)
- Lahiff, Henry of County Galway, Connach, Republic of Ireland (3)
- Laing & Douglas Construction Co. (3)
- Lake Arrowhead Community (1)
- Lake County Department of Public Works (1)
- Lake Erie Construction Co. of Cleveland, Ohio (1)
- Lakeside Bridge & Steel Co. of North Milwaukee, Wisconsin (8)
- Lam Construction Co. (2)
- Lamb, George N. of St. Charles, Illinois (1)
- Lamb-Fish Lumber Co. of Charleston, Mississippi (1)
- Lambert, B. J. of Iowa City, Iowa (3)
- Lambertville Iron Works of Lambertville, New Jersey (2)
- Laminated Concepts Inc. of Big Flats, New York (2)
- Lamoreaux Brothers of Omaha, Nebraska (1)
- Lamson, Caleb (1)
- Lana Construction Co. of Council Bluffs, Iowa (1)
- Lancaster, Samuel (5)
- Land & Marine Fabricators Corp. of Slidell, Louisiana (1)
- Land Construction Co. (1)
- Landon, C. G. (1)
- Landon, Jarvis (1)
- Landor, Edward (1)
- Landscape Concepts Construction (1)
- Lane Bridge & Iron Works (2)
- Lane Bridge Co. of Painted Post, New York (2)
- Lane Bridge Works of Painted Post, New York (3)
- Lane Construction Co. of Charlotte, NC (1)
- Lane Construction Corp of Meriden, Connecticut (1)
- Lane, P.E. of Chicago, Illinois (11)
- Lang & Bergstrom (1)
- Lang, William (1)
- Langdon & Co. of Minneapolis, Minnesota (1)
- Langenfelder & Son (1)
- Langenheim & Thomson Co. (1)
- Langley, Harold E. (5)
- Lanning, William L. (1)
- Lapham, Darius (1)
- Larrinaga, Julio of San Juan, Puerto Rico (1)
- Larry M. Turbes & Associates (1)
- Larsen, W.R. (1)
- Lasell & Gibbons (1)
- Lassig Bridge & Iron Works of Chicago, Illinois (201)
- Last Chance Canal Co. (1)
- Lathrop & Shea of New Haven, Connecticut (1)
- Latrobe, Charles H. of Baltimore, Maryland (5)
- Laub & Stuart of Pittsburgh, Pennsylvania (1)
- Laub, Hermann of Pittsburgh, Pennsylvania (1)
- Laughlin, C.V. (1)
- Laura and Kerry Sweitz (1)
- Laurgaard, Olaf (2)
- Lawler, John of Prairie Du Chien, Wisconsin (1)
- Lawler, Patrick J. (1)
- Lawrence J. Utley of Mt. Vernon, Indiana (1)
- Laws, C.F. (1)
- Lawson Ambrose Nicholson (1)
- Lawson, Joseph (1)
- Lay Construction Co. of Hannibal, Missouri (2)
- Layette Engineering Co. (1)
- Layton F. Smith (1)
- Layton, George (1)
- Leamon and Evans of Atlanta, Georgia (2)
- Leavenworth Bridge Co. (5)
- Ledford & Way (1)
- Lee Country Bridge Department (1)
- Lee Foundation Co. (1)
- Lee Moor Contracting Co. of El Paso, Texas (4)
- Lee W King (1)
- Lee's Dock Co. (1)
- Lee, C.J. (1)
- Leeson, R. V. (1)
- Leffler, B. R. (1)
- Legore, James (1)
- Lehigh Coal and Navigation Co. (1)
- Leighton Bridge & Iron Works of Rochester, New York (11)
- Leighton, Thomas (1)
- Lemaster, Walter (1)
- Lematen & Luke (1)
- Lemke Industrial Machine LLC (1)
- Lemkuhl, Charles H. of Greenfield, Iowa (1)
- Lentz & Co. of Mauch Chunk, Pennsylvania (1)
- Leo Cardwell Construction Co (1)
- Leon Hagop Nishkian of San Francisco, California (1)
- Leonard & Day (1)
- Leonard Sherman (1)
- Leonard and Day (1)
- Leonard, A.S. (1)
- Leonard, Charles (1)
- Leonard, H.R. (2)
- Leonard, John B. of Union City, Michigan (24)
- Leonardt, Carl (1)
- Leonhardt, Andrä & Partner of Stuttgart, Baden-Württemberg, Germany (3)
- Leslie G. Sumner (1)
- Leslie, Snodgrass & Dunro (1)
- Levander, C. G. (3)
- Levins Bros & Roden (1)
- Levis, John (1)
- Levy Construction Co. of Denver, Colorado (4)
- Lewandoski, Jan (10)
- Lewis F. Shoemaker & Co. of Pottstown, Pennsylvania (8)
- Lewis M. Loss of Rochester, New York (1)
- Lewis, A. A. (1)
- Lewis, A.F. of Wellsville, Kansas (2)
- Lewis, Eugene Castner (1)
- Lewis, J. C. (1)
- Lewis, J.F. (1)
- Lewisburg Bridge Co. (2)
- Lewiston Concord Bridge Co. of Lewiston, Idaho (2)
- Ley Construction Co. (1)
- Liberenz & Robinson (1)
- Liesch & Tofte (1)
- Lightbody, Thomas (1)
- Lightner, Joseph D. (1)
- Lightner, William (1)
- Lillebo, Tom (1)
- Limited, Strescon of St. John, New Brunswick, Canada (1)
- Lincoln Construction Co. of Lincoln, Nebraska (3)
- Linde & Griffith of Newark, New Jersey (1)
- Lindenthal, Gustav of Brno, Cisleithania, Austro-Hungarian Empire (Now known as Brno, South Moravia, Czech Republic) (14)
- Lindstrom & Feigenson of Portland, Oregon (13)
- Linehan & Molo of Dubuque, Iowa (1)
- Lingenfelter, F. C. (1)
- Linville, Jacob H. of Pittsburgh, Pennsylvania (20)
- Lippencott Brothers (2)
- Lippert, F.G. (1)
- Lisby & Masten (2)
- List & Clark Construction Co. (4)
- List & Weatherly Construction Co. of Kansas City, Missouri (9)
- List Construction Co. (2)
- Littleton Bridge Co. (1)
- Littrell, R.R. (1)
- Livermore, Alonzo (2)
- Livesay, Derby (1)
- Livingston, FNU (1)
- Llewellyn Iron Works of Los Angeles, California (1)
- Lloyd & Weeks (1)
- Lloyd Collins Contracting Co. (1)
- Lloyd E. Jones Co. (1)
- Lloyd, James of Hagerstown, Maryland (3)
- Lloyds Co. of Philadelphia, Pennsylvania (1)
- Loami Road District, Sangamon County (1)
- Lochner Consulting Engineers and Planners (1)
- Locke, James B. of Binghampton, New York (7)
- Lockhart, A.J. (1)
- Lockhart, D.H. (1)
- Lockwood, J.C.B. of Portland, Oregon (2)
- Lofberg Cement Co. of Grand Rapids, Minnesota (1)
- Lomas Forge & Bridge Works of Cincinnati, Ohio (5)
- Lomas Forge Bridge & Iron Works (1)
- Londino & Gallo (1)
- London Engineering & Iron Ship Building Co. of London, England, United Kingdom (1)
- Lone Pine Construction, Inc. (1)
- Long, James B. (9)
- Longfield, A.C. (1)
- Lord & Bishop Co. of Sacramento, California (4)
- Lord Construction Co. of Missoula, Montana (1)
- Lord, Russel F. (1)
- Los Angeles City Department of Public Works (1)
- Louis Rich Construction Co. (1)
- Louisiana Highway Commission (2)
- Louisville & Jefferson Bridge Co. (1)
- Louisville Bridge & Iron Co. of Louisville, Kentucky (13)
- Love Construction & Engineering Co. (1)
- Lovejoy Granite Co. (1)
- Loveren, Reuben E. (1)
- Lowery, R. E. (1)
- Lowthrop, Francis C. (4)
- Lucius Engineering Co. of Pittsburgh, Pennsylvania (2)
- Lucius, Albert of New York City, New York (6)
- Luckey, Z.H. (1)
- Luiseno, Inc. (1)
- Lukens Iron & Steel of Coatesville, Pennsylvania (2)
- Lulay, Thomas D. (1)
- Lunda Construction Co. (6)
- Luning, W.F. (1)
- Luning, William F. of Red Bluff, California (2)
- Lupfer, A.M. (1)
- Luten Bridge Co. of York, Pennsylvania & Knoxville, Tennessee (126)
- Luten Engineering Co. (5)
- Luten, Daniel B. (62)
- Luttjohann, Fred of Topeka, Kansas (15)
- Lyle & McWilliams (1)
- Lyle Buckner, Inc. (1)
- Lynch & Hill Construction of Little Rock, AR (1)
- Lynch-Cannon Engineering Co. of Los Angeles, California (2)
- Lyndon Wire Cable Bridge Co. (1)
- Lyons Iron Works (1)
- Lyons, Albert (1)
- Lyons, Tom (1)
- M -- M & H Construction of Burlington, Iowa (1)
- M&M Construction Co. (1)
- M&P Construction of Rockport, Indiana (1)
- M&P Contract Co. of Rockport, Indiana (1)
- M. A. Waldo (1)
- M. L. & M. A. Cleveland of Watertown, New York (1)
- M. Marshall & Son of Grand Rapids, Michigan (1)
- M. O'Brien of St. Paul, Minnesota (1)
- M.A. Gammino Contruction Co. (1)
- M.E. White Co. (1)
- M.J. McDermott & Co. (1)
- M.J. Paquet Inc. of Palisades Park, New Jersey (1)
- M.J. Patterson Construction Co. of Denver, Colorado (4)
- M.J. Walsh & Sons (1)
- M.M. Sundt Construction Co. (1)
- M.S. Cartter & Co. of St. Louis, Missouri (2)
- MC2 Architects of Houston, Texas (1)
- MCM Construction Inc. of Sacramento, California (2)
- Mabel, Philip (4)
- Mabey Bridge Ltd. of Lydney, Gloucestershire, England, United Kingdom & Chepstow, Monmouthshire, Wales, United Kingdom (4)
- MacArthur Bros. Co. of Chicago, Illinois (3)
- MacCornack, Clyde (1)
- MacDonald & Kahn Co. Ltd. of San Francisco, California (2)
- MacDonald, F.A. of Cedar Rapids, Iowa (1)
- MacDonald, W.S. (1)
- MacKenzie, Mann & Co., Ltd of Toronto, Ontario, Canada (1)
- MacKenzie, William (1)
- MacRae Brothers (6)
- Macco Corporation (1)
- Macdonald, Charles (2)
- Mackey, L. M. of Wagoner, Oklahoma (3)
- Macmillan, Gilbert H. (1)
- Macri Brothers & Co. (1)
- Madden, Stanford (1)
- Madigan-Hyland of New York, New York (2)
- Maginnis, Patrick (1)
- Mahl, J.T. (1)
- Mahle Brothers (1)
- Mahoney & Swanson of Jamestown, New York (1)
- Majestic Colleries Co. (1)
- Major General George A. McCall (1)
- Major William Turnbull (1)
- Malhorn, Charles (1)
- Mallory and Nash (1)
- Maloney, D.C. (1)
- Maloney, W.S. (1)
- Malony, W.L. (1)
- Maney & Alley (1)
- Maney, George A. (1)
- Manistique Pulp & Paper Co. of Manistique, Michigan (1)
- Manitowoc Shipbuilding Co. of Manitowoc, Wisconsin (3)
- Manley & Young (1)
- Manning, W. T. (1)
- Manson Construction (6)
- Manuel López-Bayo (2)
- Manufactures Bridge Co. (1)
- Marble Cliff Quarries of Columbus, Ohio (1)
- March, J.B. (1)
- Marcus Bridge & Iron Co. (1)
- Marcus Bridge & Iron Works (2)
- Marietta Manufacturing Co. of Point Pleasant, West Virginia (1)
- Marinette Marine Co. of Marinette, Wisconsin (1)
- Marinucci Bros & Co. Inc. (1)
- Mario Bridge Co. (1)
- Marion County Construction Co. (1)
- Marion, W.C. (1)
- Mark S. Hopkins (1)
- Marklo Cement Co. (1)
- Marks, Levi (1)
- Markum, John (1)
- Marsh Engineering Co. of Des Moines, Iowa (39)
- Marsh, Sylvester of Campton, New Hampshire (1)
- Marshall, Wallace (1)
- Marshalltown Bridge & Iron Works of Marshalltown, Iowa (3)
- Marston, Anson of Ames, Iowa (1)
- Martin & Kane Inc. of Newport Beach, California (1)
- Martin Kendall (1)
- Martin Sigvart Grytbak of Nedre Stjørdal, Norway (1)
- Martin, Adam Oscar of Doylestown, Pennsylvania (14)
- Martin, Charles (1)
- Martin, E. (1)
- Martin, R.E. of Nashville, Tennessee (1)
- Martin, W. A. (1)
- Martini Co. (1)
- Martini, Guiseppi (1)
- Maryland Mining Co. (1)
- Mason Syndicate, The (1)
- Mason, Adam (2)
- Mason, J.E. of Michigan City, Michigan (1)
- Mason-Walsh-Atkinson-Kier Co. (1)
- Massachusetts Department Of Transportation (1)
- Massie, Paul N. of Bessemer, Michigan (1)
- Massillon Bridge & Structural Co. (4)
- Massillon Bridge Co. of Massillon, Ohio (127)
- Massman Construction Co. of Kansas City, Missouri (16)
- Masters & Mullen Construction Co. of Cleveland, Ohio (1)
- Materials, Sunrise of Orono, Maine (1)
- Mathew Tschirgi Jr. of Dubuque, Iowa (2)
- Mathews, J. O. (2)
- Mathis, Curn (1)
- Mathis, Marshall (1)
- Mathis, Moody (1)
- Mathis, Raymond (1)
- Matson, Thomas (1)
- Matthews & Kenan (1)
- Matthews & Sturdevant (1)
- Matthews, E. N. (2)
- Matthews, E.N. (1)
- Mau, Carl F. (1)
- Maurice H. Connell & Associates, Inc. of Miami, Florida (1)
- Maury M. Caldwell (1)
- Max J. Kuney Co. (1)
- Maxcy, John W. of Houston, Texas (1)
- Maxon Construction Co. of Dayton, Ohio (1)
- Maxwell Bridge Co. (2)
- Maxwell Construction Co. of Columbus, Kansas (14)
- Mayberry and Parker (1)
- Mayer Brothers Construction Co. of Mankato, Minnesota (1)
- McAfee, M. (1)
- McBride Construction Co. of Fort Smith, Arkansas. (1)
- McCain, Daniel (1)
- McCall-Moore Engineering Co. of Waco, Texas (1)
- McCarthy Brothers Co. of River Forest, Illinois (1)
- McCarthy Improvement Co. of Davenport, Iowa (2)
- McCarthy, W. (1)
- McCartney, John (1)
- McCartney, Morton (2)
- McCarty Brothers (1)
- McCauliff, F.A. of Fitchburg, Massachusetts (1)
- McCerary-Koretsky International Inc. (1)
- McClintic-Marshall
- McClintic-Marshall Co. of Chicago, Illinois & Pittsburgh, Pennsylvania (72)
- McClung, Charles A. of Spokane, Washington (2)
- McCollough, George K. of Storm Lake, Iowa (1)
- McComas, William (1)
- McComb, D.E. (1)
- McConnel, F. H. of Caldwell, Idaho (1)
- McCormack & Sweeney (1)
- McCormack Construction Co. of Lohrville, Iowa (2)
- McCormick & Co. (2)
- McCormick, Joseph of East Providence, Rhode Island (1)
- McCracken, Frederick (1)
- McCreary & Willard of Spokane, Washington (1)
- McCreary, J. B. of Atlanta, Georgia (2)
- McCullough, Conde B. of Redfield, South Dakota (114)
- McDaniel, Clark (1)
- McDermott, Carmondy & Co. (1)
- McDonald Construction of Slidell, Louisiana (1)
- McDonald Construction Co. of Seattle, Washington (1)
- McDonald and Fealy (3)
- McDonald and Merrill (1)
- McEachern, J. A. (2)
- McEachin & McEachin, Inc. of Little Rock, Arkansas (5)
- McEnteer, Frank (2)
- McFarland-Johnson, Inc. of Binghamton, New York (1)
- McGee Engineering (1)
- McGee, Thomas A. (1)
- McGilvray, Thomas of Duluth, Minnesota (1)
- McGlone and Walesby Co. (1)
- McGowan, M.B. (2)
- McGreevy, C.J. (1)
- McGuire & Blakeslee of Lovell, Wyoming (1)
- McGuire & Cavender (3)
- McHarg-Barton of New York City, New York (1)
- McIlvaine Construction Co. (1)
- McIntier, Dan (1)
- McIntosh And Crandall (1)
- McKay & Nelson of Ft. Wayne, Indiana (1)
- McKay, John (3)
- McKee & Eck (1)
- McKeesport and Reynoldton Bridge Co. (1)
- McKellar, Everett of Chelan, Washington (1)
- McKelvy-Hine Co. of Pittsburgh, Pennsylvania (2)
- McKenzie Bridge Co. (1)
- McKenzie Construction Co. (5)
- McKenzie, D. W. (1)
- McKenzie, J.G. of Houston, Texas (3)
- McKerney & Newton (1)
- McKim, Mead & White of New York City, New York (3)
- McKinnon Construction Co. (1)
- McKinnon, R. B. (2)
- McKinnon, Rogers (1)
- McLean Contracting of Baltimore, Maryland (1)
- McLean Contracting Co. of Baltimore, Maryland (1)
- McLean, A.A. (1)
- McLouth, Amos of Monroe County, Michigan (1)
- McManis & Son (3)
- McMellen, E. of Lancaster, Pennsylvania (2)
- McMellen, Elias (11)
- McMenamin & Sons (1)
- McMenamy, John (2)
- McMillan & Pitz Construction of Manitowoc, Wisconsin (1)
- McMillan, John G. (1)
- McNairy & Claflen Manufacturing Co. of Cleveland, Ohio (7)
- McNary Bergeron & Associates of Old Saybrook, Connecticut & Broomfield, Colorado (1)
- McNeeley, Yeager & Gardner (1)
- McNeill, Capt. William Gibbs (1)
- McNerney & Hallett (1)
- McNulty, J.P. of Pine Bluff, Arkansas (4)
- McNutt Brothers (1)
- McPhetres, D. M. of Modesto, California (2)
- McQueen, Thomas (1)
- McWade, John (1)
- Mead Bros. of Battle Creek, Michigan (1)
- Mead, Frank (1)
- Mead-Balch Construction (1)
- Meads & Anderson (1)
- Mears, Colonel Frederick of Omaha, Nebraska (1)
- Megquier and Jones (1)
- Meigs, Montgomery C. (2)
- Meissert, Joe (1)
- Mekis Construction (1)
- Melan Arch Construction Co. (1)
- Melan, Josef of Vienna, Austria (1)
- Melville, C. G. (1)
- Melvin . O. Adams (1)
- Memphis Steel Co. of Memphis, Tennessee (1)
- Menifee, Thomas K. (1)
- Menn, Christian (1)
- Mercantile Bridge Co. (2)
- Mercer-Fraser Co. (3)
- Merchant, Ivan D. (11)
- Meredith, Joseph (1)
- Merrick, A.W. of Boone, Iowa (1)
- Merrifield, Joseph of Brown, Ohio (1)
- Merritt Architects, designer (1)
- Merritt-Chapman & Scott Corporation of New York, New York (16)
- Merveldt & Lawson of El Reno, Oklahoma (2)
- Mervy Elwell Co (1)
- Merydith Construction Co. (1)
- Merydith, Rolla (4)
- Messerli, Godfrey (3)
- Messmore, C.L. (1)
- Messrs. Barbaroux & Co. of Louisville, Kentucky (1)
- Metcalf, Leonard (1)
- Metcalfe, O. E. (1)
- Metropolitan Bridge Co. (1)
- Metzer, Elmer (1)
- Metzger, C.F. (1)
- Metzger, E.R. (1)
- Metzger, Lewis W. (15)
- Meyer & Greenwald Construction Co. of Meridian, Mississippi (2)
- Meyer, Valentine (1)
- Miami Central Bridge Co. (1)
- Miami Conservancy District (1)
- Michael Baker Corporation of Moon Township, Pennsylvania (2)
- Michael Erastus Rudisill (1)
- Michael J. Baker, Inc. of Coraopolis, Pennsylvania (1)
- Michael James Heney of Cordova, Alaska (4)
- Michaelsen, Thorvald of Cedar Falls, Iowa (1)
- Michelmann Steel Construction Co. of Quincy, Illinois (4)
- Michigan Bridge Co. (3)
- Michigan Department Of Transportation (1)
- Mid-Ohio Structures of Norwalk, Ohio (1)
- Mid-West Engineering Inc. (1)
- Middle States Construction Co. of Columbus, Ohio (1)
- Middleboro Pike Co. (1)
- Middlesex Companies of Littleton, Massachusetts (3)
- Midland Bridge & Iron Co. of Kansas City, Missouri (1)
- Midland Bridge Co. of Kansas City, Missouri (41)
- Midland Bridge Co. of Salt Lake City, Utah (1)
- Midland Construction Co. (1)
- Midland Erection Co. (1)
- Midland Steel Co. (1)
- Midwest Construction Co. of Nebraska City, Nebraska (1)
- Midwest Foundation Corp. of Tremont, Illinois (1)
- Midwest Steel & Iron Co. (1)
- Midwest Steel & Iron Works of Denver, Colorado (1)
- Mienan, Van (1)
- Mieth, R.E. of Portland, Oregon (1)
- Mihaljan, M.J. (1)
- Milbank, R.V. (1)
- Miles, L.J. of Fort Worth, Texas (1)
- Millard-Quigg Construction Co., The of Philadelphia, Pennsylvania (1)
- Miller & Borcherding Bridge Builders of St. Louis, Missouri (28)
- Miller & Husband Springfield IL (1)
- Miller Construction, Inc (1)
- Miller's Garage & Construction Co. of St. Louis, Missouri (2)
- Miller, A. S. (1)
- Miller, D.B. of Cheyenne & Denver (1)
- Miller, Edward (3)
- Miller, Elbin (1)
- Miller, Franklin J. (1)
- Miller, G.W. (1)
- Miller, Harlan D. of Oakland, California (8)
- Miller, Jamieson & Co. of Cleveland, Ohio (2)
- Miller, Joseph (1)
- Miller, Karl A. (1)
- Miller, R.L. (5)
- Miller, T.A. (3)
- Miller-Fifield Construction Co. of Waterloo, Iowa (3)
- Miller-Hey Construction Co. of Des Moines, Iowa (Formerly of Waterloo) (3)
- Miller-Hutchinson Co. of New Orleans, Louisiana (1)
- Miller-Taylor Construction Co. of Waterloo, Iowa (3)
- Milliken Brothers of New York City, New York (6)
- Mills, E.R. (2)
- Mills, Merton (1)
- Milne, James of Scotch Grove, Iowa (1)
- Milton & James C. Stevens (1)
- Milton Graton & Son of Ashland, New Hampshire (8)
- Milton Graton Associates (2)
- Milward, Frank (1)
- Milwaukee Bridge & Iron Co. of Milwaukee, Wisconsin (13)
- Milwaukee Bridge & Iron Works of Milwaukee, Wisconsin (30)
- Milwaukee Bridge Co. of Milwaukee, Wisconsin (21)
- Milwaukee Bridge Works of Milwaukee, Wisconsin (3)
- Miner, William H. (1)
- Mineralized Cell Wood Preserving Co. of Portland, Oregon (1)
- Minesinger, James (1)
- Mingle, F.H. (1)
- Minneapolis Bridge & Iron Co. (1)
- Minneapolis Bridge & Iron Works (1)
- Minneapolis Bridge Co. of Minneapolis, Minnesota (16)
- Minneapolis Steel & Machinery Co. of Minneapolis, Minnesota (24)
- Minneapolis-Moline Power Implement Co. of Minneapolis, Minnesota (1)
- Minnesota Highway Commission (1)
- Minnesota Highway Department (5)
- Minnesota-Moline Power Implement Co. (1)
- Minnick, Mike (1)
- Minnowa Construction Inc. of Harmony, Minnesota (2)
- Miron Construction Co. of Neenah, Wisconsin (1)
- Mississippi Structural Steel Co. of Melrose Park, Illinois (1)
- Mississippi Valley Bridge Co. of Leavenworth, Kansas (2)
- Mississippi Valley Structural Steel Co. of Decatur, Illinois (5)
- Missouri Bridge & Iron Co. of St. Louis, Missouri (32)
- Missouri Bridge & Iron Works (1)
- Missouri Construction & Ballast Co. (1)
- Missouri DOT engineered bridge (1)
- Missouri Highway Department (1)
- Missouri State Highway Commission (1)
- Missouri State Highway Department (1)
- Missouri Valley Bridge & Iron Co. of Leavenworth, Kansas (105)
- Missouri Valley Bridge & Iron Works of Leavenworth, Kansas (26)
- Mitchell & Hunt (1)
- Mitchell, F. C. (1)
- Mitchell, Robert C. (1)
- Mitsubishi Heavy Industries, Ltd. of Tokyo, Japan (1)
- Mittry Brothers Construction Co. (1)
- MoDot (1)
- Mock, Thomas M. (1)
- Modern Continental Construction Co. of Tarzana, California (1)
- Modern Steel Structural Co. of Waukesha, Wisconsin (1)
- Modern Steel Structures Co. of Waukesha, Wisconsin (3)
- Modjeski & Chase (1)
- Modjeski & Masters of Mechanicsburg, Pennsylvania (25)
- Modjeski, Masters & Chase of Harrisburg, Pennsylvania (2)
- Modjeski, Ralph of Bochnia, Poland (49)
- Moffatt & Nichol (1)
- Moffatt, J. H. (1)
- Moffatt, Nichol and Taylor (1)
- Mohawk & Hudson Iron Works of Waterford, New York (1)
- Moisseiff, Leon of Riga, Latvia (8)
- Monarch Engineering Co. of Denver, Colorado (13)
- Monongahela Valley Engineering Co. (1)
- Monson-Treiweiler Co. (1)
- Montag, C.J. (1)
- Montana Bridge & Iron Co. (1)
- Montana Department of Transportation (2)
- Montana State Prison Convicts of Deer Lodge, Montana (2)
- Montgomery County (1)
- Montgomery Waddell (1)
- Montgomery and Parker Co. of Rockport, Indiana (2)
- Montgomery, Julian of Austin, Texas (6)
- Montgomery, W. R. (2)
- Montour Steel Co. (1)
- Monty Brothers (1)
- Monty Brothers Co. (1)
- Mooney, J.H. (1)
- Moore Drydock Co. of Oakland, California (2)
- Moore, F.C. of Milwaukee, Wisconsin (1)
- Moore, J. A. of Muskogee, Oklahoma (1)
- Moore, J. M. (1)
- Moore, John (1)
- Moore, W. H. (6)
- Moore, Walter (1)
- Moore, William H. (1)
- Moore, William S. of South Bend, Indiana (4)
- Moore-Lopier Corp. (1)
- Moore-Mansfield Construction of Indianapolis, Indiana (5)
- Moran & Buckner of Muskogee, Oklahoma (1)
- Moran and Proctor of New York, NY (2)
- Moran, Daniel E. (1)
- Morava Bridge Co. of Chicago, Ilinois. (1)
- Morava Construction Co. of Chicago, Illinois (3)
- Morehouse, W.W. (1)
- Morelli, Carlo (1)
- Moretti, Giuseppe of Siena, Tuscany, Italy (1)
- Morgan, N.W. (1)
- Morgan, Nathan W. (1)
- Morison, Field & Co. (1)
- Morison, George S. of New Bedford, Massachusetts (32)
- Morris & Essex RR (1)
- Morris, Clyde T. (2)
- Morris, J. A. (1)
- Morris, John (1)
- Morris, Johnny (1)
- Morris, T.J. of Hannibal, Missouri (1)
- Morrisey, M.F. (1)
- Morrison and Coleman (1)
- Morrison, C.C. (2)
- Morrison, D.H. of Dayton, Ohio (14)
- Morrison, George E. (1)
- Morrison-Knudsen Co. of Boise, Idaho (10)
- Morrison-Maierle Inc. of Helena, Montana (1)
- Morrow Construction Co. (1)
- Morrow, Irving (1)
- Morse Bridge Co. of Youngstown, Ohio (31)
- Morse, Roy W. (1)
- Mortland, James A. (1)
- Moseley Iron Bridge & Roof Co. of Boston, Massachusetts (8)
- Moseley, John (1)
- Moseley, Thomas (6)
- Moses, Robert of New Haven, Connecticut (2)
- Mosher Steel Co. of Dallas, Texas (2)
- Mosites Construction Co. of Pittsburgh, Pennsylvania (1)
- Motes & Vardaman Construction Co. (1)
- Motherwell Iron & Steel Co. of Logan, Ohio (1)
- Motz, T.B. (1)
- Mould, Jacob W. (2)
- Mountain States Construction Co. of Eugene, Oregon (6)
- Mountz, Jeremiah (1)
- Mowat Construction Co. of Woodinville, Washington (16)
- Moyano, David C. (1)
- Mt. Vernon Bridge Co. of Mt. Vernon, Ohio (59)
- Mudget, Ira (1)
- Muehler & Notter (4)
- Mueller, J.W. (2)
- Mueller, John W. (2)
- Mueller, Martin P. (2)
- Mueller, Reinhard (2)
- Mueser, William of Moers, North Rhine-Westphalia, Germany (6)
- Mulholland Construction Co. (1)
- Mull, Charles H. (1)
- Mullan Contracting Co. of Baltimore, Maryland (1)
- Mullen, C.S. (2)
- Mullen, John L. of Lincoln, Nebraska (1)
- Muller, Jean (1)
- Mullins, J.F. (1)
- Mullins, L.A. of Atlanta, Georgia (1)
- Mullins, W.S. (1)
- Mumaw and Briege (1)
- Mundy, A.A. of Austin, Texas (1)
- Munfordville Bridge Co. (1)
- Munilla Construction Management (1)
- Munson, A.P. (1)
- Munster, A. (1)
- Munster, Andreas Wendslbo of Bergen, Hordaland, Norway (2)
- Murch Brothers Construction of St. Louis, Missouri (1)
- Murdoch, Alexander (1)
- Murdoch, R.B. of Crown Point, New Jersey (1)
- Murphy Brothers, Inc. (1)
- Murphy, T.B. (1)
- Murphy, W.J. of Tacoma, Washington (1)
- Murphy-Pacific Corp. of San Francisco, California (3)
- Murray, Dougal & Co. of Milton, Pennsylvania (2)
- Murray, R.M. (2)
- Murray, Ray M. (3)
- Murrow, Lacey V. (1)
- Muscatine Bridge Co. of Muscatine, Iowa (1)
- Muscatine Rotary Club of Muscatine, Iowa (1)
- Muskogee Bridge Co. (1)
- Muskogee Contracting Co. (2)
- Muskogee Iron Works of Muskogee, Oklahoma (3)
- Myers, R.R. (1)
- Myers, Samuel (3)
- Myers, Walter E. (1)
- Myers-engineer, E.T.D. (1)
- N -- N.M. Stark & Co. of Des Moines, Iowa (43)
- NC-DOT (2)
- NNW Engineering, Inc. of Iowa City, Iowa (1)
- Nading, A.J. of Clayton County, Iowa (1)
- Naiden, F.S. (1)
- Napier, T.H. (1)
- Nash, Melvin A. of Fort Edward, New York (1)
- Nashville Bridge Co. of Nashville, Tennessee (33)
- Nassaux-Hemsley, Inc. (1)
- National Bridge & Iron Works of Boston, Massachusetts (6)
- National Bridge Co. of Indianapolis, Indiana (7)
- National Concrete Co. of Indianapolis, Indiana (18)
- National Construction & Equipment Co. of New York, New York (1)
- National Construction Co. of South Omaha, Nebraska (1)
- National Engineering & Construction Co. of Milwaukee, Wisconsin (1)
- National Park Service of Washington, D.C. (3)
- National Steel Corporation (1)
- National Youth Administration (1)
- Natural Rock formation, Post Wisconsin Glacier (1)
- Naugle, Holcomb & Co. of Chicago, Illinois (1)
- Nauman, George (4)
- Navares, Raphael (1)
- Nebraska Bureau of Roads & Bridges (4)
- Nebraska Highway Department (1)
- Nebraska Steel Erectors, Inc. of South Sioux City, Nebraska (1)
- Needles, Howard (2)
- Needs, A.G. (1)
- Neely Smith & Co. of Chattanooga, Tennessee (1)
- Neer, G.D. (1)
- Neff, Abel of Oshkosh, Wisconsin (1)
- Nehalem Timber & Logging Co. of Scappoose, Oregon (1)
- Neidig, Augustus (1)
- Neidt, A.F. (1)
- Nels Lind & Co. (1)
- Nels Peter Lund (1)
- Nelsen Concrete Culvert Co. of Pontiac, Illinois (2)
- Nelso Shields (1)
- Nelson & Buchanan (1)
- Nelson & Buchanan Co. of Chambersburg & Pittsburgh, Pennsylvania (26)
- Nelson Construction Co. (1)
- Nelson, A.T. of Duluth, Minnesota (1)
- Nelson, Alexander H. (1)
- Nelson, Harry (1)
- Nelson, L.W. (1)
- Nelson, Olaf (1)
- Nelson-Merydith Co. of Chambersburg, Pennsylvania (10)
- Nettleton, Scott (1)
- Neukirch Brothers of Seattle, Washington (1)
- Neumann Monson PC of Iowa City, Iowa (1)
- Nevada Construction Co. (1)
- Neville, Charles E. (1)
- Neville, M. A. (1)
- Nevins, J. R. (1)
- New Atlantic Contracting Inc. of Winston-Salem, North Carolina (1)
- New Bremen Bridge Co. (4)
- New Castle Bridge Co. of New Castle, Indiana (6)
- New Castle Bridge Co. of Indianapolis, Indiana (4)
- New Castle County Engineer's Office (2)
- New Columbus Bridge Co. of Columbus, Ohio (8)
- New England Structural Co. of Boston, Massachusetts (12)
- New Hampshire Cement Construction Co. (1)
- New Hampshire Highway Department (1)
- New Jersey Bridge & Iron Co. (1)
- New Jersey Bridge Co. (4)
- New Jersey Interstate Bridge and Tunnel Commission (1)
- New Jersey Steel & Iron Co. of Trenton, New Jersey (13)
- New Jersey-West Virginia Bridge Co. (1)
- New Point Stone (1)
- New York Bridge Co. (1)
- New York Central Ironworks (1)
- New York State Bridge and Tunnel Commission (1)
- New York State Fence (1)
- Newkirk & Powers (2)
- Newman, J.B. (1)
- Newman, J.J. (1)
- Newton Engineering Co. of Milwaukee, Wisconsin (2)
- Neyer Construction Co. (1)
- Niagara Bridge Works of Buffalo, New York (2)
- Nicholas Hall & M.L.Carter (1)
- Nichols Brothers Boat Builders (1)
- Nichols Montgomery Powers (6)
- Nichols, Olo E. (3)
- Nichols, Othniel F. (1)
- Nicholson, George (1)
- Nick Fabrikant (1)
- Nickerson, Geo. S. (1)
- Nicolaysen, A. K. (2)
- Nicolls, Gustavus A. of Baile Mhic Andáin, Contae Chill Chainnigh, Éire (2)
- Nicrisse & Decluve of La Louvière, Hainaut, Wallonia, Belgium (2)
- Nielson, F. H. (1)
- Nims & Frost (2)
- Ninlliat, Luis of San Juan, Puerto Rico (1)
- No public records of its design, funding or contractors. (1)
- Noble County Commission (1)
- Noble, Alfred (3)
- Noftzger, Lee (1)
- Nolan & Brothers Co. (1)
- Nones, Rafael of San Juan, Puerto Rico (6)
- North Carolina Department Of Transportation (1)
- North Carolina Department of Highways (1)
- North Carolina State Highway Commission (2)
- North Carolina State Highway Department (1)
- North Carolina State Highway and Public Works Commission (1)
- North Dakota State Highway Commission (1)
- Northern Construction Service, LLC of Palmer, Massachusetts (1)
- Northern Stud Welding (1)
- Northland Constructors of Duluth, Minnesota (1)
- Northrup, Joseph W. (2)
- Northwest Bridge Co. of Tacoma, Washington (1)
- Northwest Bridge Works of Portland, Oregon (1)
- Northwest Contract Co. (2)
- Northwest Steel Co. of Portland, Oregon (3)
- Northwestern Bridge & Iron Co. of Milwaukee, Wisconsin (1)
- Northwestern Electric Co. (1)
- Northwestern States Portland Cement Co. of Mason City, Iowa (1)
- Northwestern Terra Cotta Co. (1)
- Norton and Collins Co. (1)
- Norwood, C.H. (1)
- Notarn, R.M. (1)
- Nothnagel Enterprises (1)
- Notter, George (2)
- Nourse, Asa (1)
- Nunn, Herbert (1)
- Nunnally, Jim P. (1)
- Nuttall Gear Co (1)
- Nygren, N. (1)
- Nystedt & Isham (1)
- Nystedt, C. J. (2)
- O -- O & M Burnett of Marengo, Iowa (1)
- O'Brien Bros. of St. Paul, Minnesota (1)
- O'Connell Electric (1)
- O'Hanlan & O'Hara (3)
- O'Keefe & Orbison Engineering & Construction Co. of Appleton, Wisconsin (4)
- O'Neil Brothers of Champaign, Illinois (2)
- O'Neill Brothers Construction Co. from Danville, IL (1)
- O'Neill, George (2)
- O'Rourke Engineering Construction Co. (1)
- O.J.Larkin (1)
- OBEC Consulting Engineers of Eugene, Oregon (13)
- ODOT (2)
- OPAC Consulting Engineers of San Francisco, California (3)
- Oakes, J.C. (1)
- Obayashi Corporation of Tokyo, Japan (1)
- Oberholtzer, M.L. (3)
- Odom, F. L. (2)
- Odom, F.L. (2)
- Oglesby, John C. (1)
- Ohio Bridge Co. of Cleveland (14)
- Ohio Bridge Co. of Toledo (2)
- Ohio Bridge Co.? (1)
- Ohio Steel Erection Co. (1)
- Ojard, Krech of Duluth, Minnesota (2)
- Oklahoma Highway Commission (1)
- Oklahoma Iron Works of Tulsa, Oklahoma (1)
- Oklahoma Paving Co. of Oklahoma City, Oklahoma (3)
- Oklahoma State Highway Department (2)
- Oklahoma State Penitentiary Convicts of McAlester, Oklahoma (1)
- Olberg, Charles R. (1)
- Older, Clifford (1)
- Olds, E.D. (1)
- Ole Sinsgtad-designer (1)
- Olin, Nathaniel (1)
- Olinger Brothers (1)
- Olinger, R.P. of Huntingburg, Indiana (1)
- Oliver Co. of Knoxville, Tennessee (1)
- Oliver Iron & Steel Co. of Pittsburgh, Pennsylvania (1)
- Olmsted, Frederick Law (15)
- Olsen, Alfred (1)
- Olsen, John (1)
- Olson & Johnson Co. (1)
- Olson Beale Construction of Lindon, Utah (1)
- Olson Construction Co. (1)
- Olson, Maurice (1)
- Oltendorf Construction Co. (1)
- Omaha & Council Bluffs Railway & Bridge Co. (1)
- Omaha Steel Works of Omaha, Nebaraska (10)
- Omaha Structural Steel Co. of Omaha, Nebraska (2)
- Omaha Structural Steel Works (2)
- Omberg, J. A. (1)
- Orders Construction Co. (1)
- Orders Construction Co., Inc. of St. Albans, West Virginia (1)
- Oregon Bridge & Construction Co. (1)
- Oregon Improvement Co (1)
- Oregon-Washington Bridge Co. (1)
- Oregonia Bridge Co. of Lebanon, Ohio (24)
- Orino, Bell & Malcolm of Portland, Oregon (3)
- Orino, Sam (1)
- Orr, John (1)
- Orr, M. K. of Little Rock, Arkansas (3)
- Orrin Backus (1)
- Ortega, Enrique (1)
- Osage Bridge & Iron Works (1)
- Osborn Engineering Co. of Cleveland, Ohio (8)
- Osborn-Barnes Construction Co. (1)
- Osborne, Richard B. (3)
- Osburn, Robert J. (1)
- Oscar H. Schmidt, Inc. of St. Joseph, Missouri (1)
- Oscar Shields (1)
- Ostrander Co. (1)
- Otak of Portland, Oregon (1)
- Otis Elevator of Farmington, Connecticut (3)
- Otis Hamar (1)
- Ottawa Bridge Co. (1)
- Ottinger Brothers Construction Co. (1)
- Ottinger, E. C. (1)
- Ottinger, T. C. (1)
- Otto, Carl L. (1)
- Otto, Olaf (1)
- Ottumwa Bridge Co. of Ottumwa, Iowa (4)
- Ottumwa Supply & Construction Co. of Ottumwa, Iowa (3)
- Overland Construction Co. of Chicago, Illinois (1)
- Overman, D.H. (4)
- Owego Bridge Co. of Owego, New York (31)
- Owen H. O'Neill (1)
- Owen, Abraham (1)
- Owens, Gerald B. (1)
- Ozark Engineering Co. of Joplin, Missouri (1)
- P -- P. G. Cowan, John Lynch of Darlington, and H. Severenson (1)
- P. I. Cox Construction Co. (1)
- P. McManus Co. (1)
- P. Mervyn Stephenson (7)
- P. Wiest (1)
- P.A.C. Spero & Co. (1)
- P.J. Nickel Co. (1)
- P.L. Crooks & Co. (1)
- P.S. Easterday & Co. of Walla Walla, Washington (1)
- PCL Construction Enterprises of Edmonton, Alberta, Canada (7)
- PDM Bridge of Eau Claire, Wisconsin (2)
- PSM Construction USA, Inc. of Brisbane, California (1)
- Pacific Bridge Co. of Portland, Oregon (24)
- Pacific Bridge Co. of Oakland, California (3)
- Pacific Bridge Co. of San Francisco, California (1)
- Pacific Car & Foundry Co. of Seattle, Washington (2)
- Pacific Construction Co. of San Francisco, California (6)
- Pacific Construction Co. of Spokane, Washington (1)
- Pacific Iron & Steel Co. (1)
- Pacific Iron Works of Portland, Oregon (3)
- Pacific Railway & Navigation Co. (1)
- Pacific States Construction Co. (1)
- Pacific-Murphy Corporation (1)
- Packard, Franklin L. (1)
- Packard, Lambert (1)
- Paddleford, Phillip (3)
- Page & Schnable of Chicago, Illinois (4)
- Page, Charles (1)
- Page, Rufus (1)
- Page, Todd (1)
- Paige, Carey & Co. (1)
- Paine & Gallucci Inc. of Tacoma, Washington (1)
- Paine, Arthur B. (1)
- Pakar Construction Co. (1)
- Palatka Bridge Co. of Palatka, Florida (1)
- Palmateer, W.A. (1)
- Palmer & Baker, Inc. (3)
- Palmer & Hornbostel of New York, New York (1)
- Palmer & Reed (1)
- Palmer Steel Co. of Springfield, Massachusetts/Holyoke, Massachusetts (8)
- Palmer, Timothy (2)
- Palmetto Bridge Constructors of Charleston, South Carolina (1)
- Pan American Bridge Co. of Moberly, Missouri (1)
- Pan American Bridge Co. of New Castle, Indiana (38)
- Pandora Cement Block Co. (1)
- Panhorst, Frederick W. (5)
- Paniagua, Roque (1)
- Pardue, Will (1)
- Parham Construction Co. of East St Louis, Illinois (1)
- Paris Bridge Co. (5)
- Park Boulevard Co. (1)
- Parker & Banfield of Portland, Oregon (5)
- Parker, Charles H. (6)
- Parker, George A. (2)
- Parker, H.G. (1)
- Parker, Henry G. (1)
- Parker-Schram Co. (1)
- Parlier, Oscar (3)
- Parsons Brinckerhoff of New York City, New York (4)
- Parsons Transportation Group of Pasadena, California (2)
- Parsons, Austin F. (3)
- Parsons, Brinckerhoff, Quade & Douglas of New York City, New York (5)
- Parsons, Brinkerhoff, Hall & Macdonald of New York City, New York (2)
- Parsons, J. L. of Fort Dodge, Iowa (1)
- Parsons, Klapp, Brinckerhoff & Douglas of New York City, New York (2)
- Partridge, J.R. of Augusta, Maine (1)
- Partridge, Reuben of Wilmington, New York/Marysville, Ohio (9)
- Pasadena Water Division (1)
- Pasco Construction Co. (1)
- Passaic Rolling Mill Co. of Paterson, New Jersey (9)
- Passaic Steel Co. of Patterson, New Jersey (1)
- Patapsco Bridge & Iron Works (1)
- Patch & Swords (1)
- Patterson Steel Co. (2)
- Patterson, Earl (1)
- Patterson, J.A. (1)
- Patterson, Robert (1)
- Patterson-Burghardt Construction Co. of Denver, Colorado (2)
- Pattillo & Associates of Glenwood Springs, Colorado (1)
- Paul Bacco Construction Co. (1)
- Paul F. Barnard of Ames, Iowa (1)
- Paul Jarvis Inc. (2)
- Paul Philippe Cret (4)
- Paul Smith Construction Co. (1)
- Paul Wills (1)
- Paul, Frederick T. (1)
- Paules, J.O. (1)
- Pavlo Engineering Co. of New York City, New York (1)
- Paxson, Glenn S. of Salem, Oregon (59)
- Paxton-Vierling Steel Co. of Carter Lake, Iowa (3)
- Paxton-Vierling Steel Works (2)
- Payne, Frank of Danville, Illinois (2)
- Payson, William (3)
- Peacock Construction Co. (1)
- Pearson & Son, Ltd of London, England, United Kingdom (1)
- Peart Bros. (1)
- Peckham Construction Co. Inc. of Buffalo, New York (1)
- Pederson, Hans (1)
- Pee, Joe (1)
- Pegram, George of Council Bluffs, Iowa (24)
- Peirce, James M. (1)
- Peirce, James M. (2)
- Pelgate, Alfred M. (2)
- Pencoyd Bridge & Construction Co. of Pencoyd, Pennsylvania (13)
- Pencoyd Iron Works of Pencoyd, Pennsylvania (28)
- Pendleton, Craig R. (1)
- Penn Bridge & Machine Works of Beaver Falls, Pennsylvania (1)
- Penn Bridge Co. of Beaver Falls, Pennsylvania (68)
- Penn Bridge Works of Beaver Falls, Pennsylvania (7)
- PennDOT Bridge Division (10)
- Pennington, WC (1)
- Pennsylvania Bridge Co. of Beaver Falls, Pennsylvania (5)
- Pennsylvania Canal Co. (1)
- Pennsylvania Department of Highways (1)
- Pennsylvania Main Line Canal (1)
- Pennsylvania Steel Co. of Steelton, Pennsylvania (141)
- Pennsylvania Turnpike Commission (7)
- Pennsylvania state highway department (2)
- Pensacola Shipbuilding Co. (1)
- Penzel, Linus (2)
- Peppard & Fulton (1)
- Peppard, O.E. of Missoula, Montana (15)
- Perkins Bridge & Supply Co. (2)
- Perkins Brothers of Horseheads, New York (1)
- Perlatti, Luigi (1)
- Perry McGlone Construction Co. of Kansas City, Missouri (4)
- Perry, Arthur I. (1)
- Pertell, Mr. of Milwaukee, Wisconsin (1)
- Petardi, Joseph (1)
- Peter Kiewit & Sons of Omaha, Nebraska (15)
- Peter Paddleford (1)
- Peter Sluszka (1)
- Peters, Amos J. of Longview, Washington (1)
- Peterson & Earnhart (2)
- Peterson Builders Inc. (1)
- Peterson Contractors Inc. of Reinbeck, Iowa (1)
- Peterson, Charles E. (1)
- Peterson, Vernon (1)
- Petry-Moulton Co. of Cheyenne, Wyoming (1)
- Pharaoh & Co. of Henryetta, Oklahoma (1)
- Phee Construction Co. of Chicago, Illinois (1)
- Phelps, George W. (1)
- Philadelphia Bridge Works of Philadelphia, Pennsylvania (2)
- Phillips Contracting Co. (2)
- Phillips,, F. C. (3)
- Phoenix Bridge Co. of Phoenixville, Pennsylvania (170)
- Phoenix Iron Co. of Philadelphia, Pennsylvania (29)
- Phoenix Iron Works of Phoenixville, Pennsylvania (14)
- Phoenix Steel Inc. of Eu Claire, Wisconsin (1)
- Phoenix-Tempe Stone Co. (2)
- Phoenix? (3)
- Phoenixville Bridge Co. (1)
- Phoenixville Iron Works of Philadelphia, Pennsylvania (2)
- Piano, Renzo (1)
- Pierce Gruber & Beam (1)
- Pierce, O.N. (3)
- Pihlfeldt, Thomas G. (4)
- Pinney, J.C. (1)
- Pioneer Bridge Co. of Kansas City, Missouri (4)
- Pioneer Bridge Co. of Mitchell, South Dakota (1)
- Pioneer Construction Co. of Malvern, Arkansas (25)
- Pipeline, National (1)
- Piper & Shiffler Bridge Co. (1)
- Pithie (1)
- Pittsburg Bridge Co. (3)
- Pittsburg Steel Casting Co. (1)
- Pittsburgh Bridge Co. of Pittsburgh, Pennsylvania (34)
- Pittsburgh Construction Co. of Pittsburgh, Pennsylvania (5)
- Pittsburgh Locomotive Works of Pittsburgh, Pennsylvania (1)
- Pittsburgh Steel Construction Co. (1)
- Pittsburgh-Des Moines Steel Co. of Des Moines, Iowa & Pittsburgh, Pennsylvania (32)
- Pittsfield Construction Co. of Englewood, Florida (4)
- Placer County (1)
- Plagens, Albert G. (1)
- Plante, Antoine (1)
- Platzer, Harmon of Kemah, Texas (1)
- Pleasant-Hasler Contracting Co. (2)
- Plymale, D.P. (1)
- Pocahontas Coal Co. (1)
- Pohl, Joseph L. (1)
- Poinsett, Joel (1)
- Polisson, Paul A. (1)
- Pomarino & Pearthree (1)
- Pomeroy, J.H. of San Francisco, California (4)
- Poole, McGonigle, and Dick of Portland, Oregon (3)
- Pope Construction Co. (2)
- Pope, Willard S. of Detroit, Michigan (1)
- Porman, M.D. of York, Pennsylvania (2)
- Port Arthur-Fort William Rotary Club of Port Arthur, Ontario, Canada & Fort William, Ontario, Canada (1)
- Porter Brothers Co. of Spokane, Washington (4)
- Porter McCully Constr. Co. (1)
- Porter-Dewitt Construction Co. (1)
- Portier, Guido A. (1)
- Portland Bridge Co. of Portland, Oregon (4)
- Portland Dredging Co. of Portland, Oregon (1)
- Possibly D.H Morrison / Columbia Bridge Works. (1)
- Post & McCord Works of New York City, New York (1)
- Post, Simeon S. (1)
- Post, W. S. (1)
- Potashnick, R.B. (1)
- Potisuk, T. (1)
- Potter, Andrew J. (1)
- Powell Brothers (1)
- Powell Brothers Inc (1)
- Powell, Ainsworth L. of Postville, Iowa (1)
- Powell, Harry R. of Grenfell, Saskatchewan, Canada & Seattle Washingon (3)
- Power, Utah (1)
- Powers Thompson Construction Co. (1)
- Powers, James F. (1)
- Praeger, Capt. Emil H. (1)
- Prahl, Emil (1)
- Prater, Ben D. of Harrisonville, Missouri (1)
- Pratt Bridge Co. (1)
- Pratt Construction Co. (1)
- Pratt and Shepherd Co. (1)
- Pratt, Jonathan (1)
- Pratt, Tomas & Caleb Co. (1)
- Pratt, W.H. (1)
- Pratt, William A. (3)
- Praytor, Howton & Wood (1)
- Prescon Corporation of Corpus Christi, Texas (3)
- Prescott & Callannan of Albany, New York (1)
- Preston, George B. (2)
- Preston, William G. (1)
- Price Brothers (1)
- Price Brothers Co. of Lansing, Michigan (1)
- Prickett, Mose A. (1)
- Priester Construction Co. of Davenport, Iowa (1)
- Prior, J. H. (18)
- Prison Laborers (3)
- Prisoners Of War (1)
- Probably Groton Bridge Co. Per M Quiet (1)
- Probst, George (1)
- Proctor, A. G. (1)
- Proctor, Phimister A. (2)
- Proksch, A.H. (1)
- Provo Foundary & Machine Co. (1)
- Prow, J.C. (1)
- Pryor & Jeffrey (1)
- Public Roads Administration (1)
- Public Works Administration (34)
- Public Works Construction Co. (5)
- Pueblo Bridge & Construction Co. (2)
- Pueblo Bridge Co. of Pueblo, Colorado (21)
- Puerto Rico Iron Works of Playa de Ponce, Puerto Rico (2)
- Puget Construction Co. (3)
- Puget Sound Bridge & Dredging Co. of Seattle, Washington (10)
- Puget Sound Bridge & Dry Dock (1)
- Pullman Standard Car Manufacturing Co. of Chicago, Illinois (1)
- Puls, Otto (1)
- Purcell & Clark (1)
- Purcell, Charles H. (21)
- Purdy Construction Co. (1)
- Purvis & Bertram Construction Co. of Fort Worth, Texas (3)
- Q -- Quackenbush, John E. of Webster City, Iowa (2)
- Quail, F. E. (1)
- Quandel of Harrisburg, Pennsylvania (1)
- Queen City Bridge Co. (1)
- Quimby, Henry H. of Philadelphia, Pennsylvania (3)
- Quincy Engineering, Inc. of Sacramento, California (1)
- Quinn & Powell Construction (1)
- Quinn Construction Co. of Salisbury, Missouri (1)
- Quist, A. W. (1)
- R -- R-Delta Engineers Inc. of Garland, Texas (1)
- R. A. Leavitt of Melrose, Massachusetts (1)
- R. C. Stevens Co. (1)
- R. McCalman Construction (1)
- R. P. Farnsworth & Co. of New Orleans, Louisiana (2)
- R. R. Tway, Inc. of Oklahoma City, Oklahoma (5)
- R. Toohey & Sons of Phoenix, Arizona (1)
- R. Van Hearden (1)
- R.B. Potashnick Construction, Inc. of Cape Girardeau, Missouri (2)
- R.C. Churchill Co. Inc. (2)
- R.C. Mahon Co. of Detroit, Michigan (2)
- R.C. Mattingly & W. Heafey (1)
- R.C. Ritz Construction Co. (1)
- R.C. Storrie & Co. of San Francisco, California (1)
- R.D. Weaton Bridge Co. of Chicago (1)
- R.D. Wheaton & Co. of Chicago, Illinois (4)
- R.F. Hawkins Iron Works of Springfield, Massachusetts (19)
- R.G. Watkins & Son of Amesbury, Massachusetts (1)
- R.G. Zachrich Construction (2)
- R.H. Harper Construction Co. (1)
- R.H.H. Blackwell Co. of Kingsport, Tennessee (2)
- R.J. Vickery (1)
- R.L. Gaster Construction Co. of Little Rock, Arkansas (1)
- R.L. McCoy, Inc. (1)
- R.R. Dawson Bridge Co. (1)
- R.R. Kitchen Co. of Wheeling, West Virginia (1)
- R.W. & B.H. Pinney Bros (1)
- RDG Dahlquist Art Studio of Des Moines, Iowa (1)
- Rae, Walter S. of Pittsburgh, Pennsylvania (2)
- Raeber, C. (8)
- Raff & Dexter (1)
- Railroad Co. Bridge Gang/Railroad Co. Forces (5)
- Raimundo Camprubí (2)
- Rall, Theodor of Chicago, Illinois (9)
- Ralston, J.C. (3)
- Rambo, N.R. (1)
- Rambo, Nathan R. (2)
- Ramsey & Co. (1)
- Ramsour, Andrew L. of Hickory, North Carolina (1)
- Ranaldo, Rich (1)
- Rand, O.H. (1)
- Randall Stout Architects of Los Angeles, California (1)
- Randolph, Isham (5)
- Ransome, Ernest L. of England (2)
- Rapid Span Structures Ltd. of Armstrong, Britisch Columbia, Canada (1)
- Rapp, F. A. (1)
- Rasmussen, Madison (1)
- Ratcliff, J.G. of Waukon, Iowa (1)
- Rath, W.I. (1)
- Rathbun, Elias (1)
- Raush, F.M. (1)
- Ravi Engineering of Rochester, New York (1)
- Ray & Son of Louisiana, Missouri (1)
- Ray, George (1)
- Raymond & Campbell of Council Bluffs, Iowa (4)
- Raymond International of Ontario, California. (5)
- Raymond Pile & Concrete Co. (1)
- Raynor, C.W. of Portland, Oregon (1)
- Rayor, Gary (1)
- Raúl Gaya Benejam (1)
- Reading Steel Products Inc. (1)
- Reading, Robert (1)
- Reagan, J. B. (1)
- Reagan, Y.P. (1)
- Reamsnyder, Sam (1)
- Rebcon, Inc. of Dallas, Texas (1)
- Recchi America Inc. of Miami, Florida (1)
- Redline, Joseph (1)
- Reed & Reed of Woolwich, Maine (1)
- Reed, Charles E. (1)
- Reed, Oliver S. (1)
- Reed, Wendall M. (1)
- Reese & Davis of Hermiston, Oregon (1)
- Reeve, Ward & Keepers of Clinton, Iowa (2)
- Reeves Construction Co. (1)
- Regenhardt Construction Co. (1)
- Reidy, Maurice A. (1)
- Reilly & Riddle Co. of Philadelphia, Pennsylvania (1)
- Reilly, Thomas (1)
- Reimard, C. H. of Bloomsburg, Pennsylvania (1)
- Reinking Co. of Des Moines, Iowa (1)
- Reiter, Curtis & Hill of Philadelphia, Pennsylvania (2)
- Remington Bridge Works of Ilion, New York (1)
- Renaud Bros. Inc. (9)
- Rennie, John of Phantassie, East Lothian, Scotland, United Kingdom (1)
- Renno, David (1)
- Reno Construction Co (1)
- Republic Concrete Construction Co. (2)
- Reuben Ely Jr. of Monticello, Iowa (1)
- Reuben Ely Sr. of Monticello, Iowa (1)
- Reuben Fields, Contractor (1)
- Reuss, George (1)
- Reyes Engineering of Portland, Oregon (1)
- Reynolds & Sutton (2)
- Reynolds Aluminum of Milwaukee, Wisconsin (1)
- Reynolds Ely Construction Co. of Springville, Utah (1)
- Reynolds Metals Co. of Richmond, Virginia (1)
- Reynolds, C.H. (1)
- Rezner Stone Co. (1)
- Rezner, William (11)
- Rhutasel and Associates, Inc. of Freeburg, Illinois/Centralia, Illinois/Evergreen, Colorado (2)
- Rice & Weidman (1)
- Rice, F.E. (1)
- Rice, L.V. (1)
- Richard F. Hawkins of Hawkins and Burrall, Springfield (1)
- Richard Heysick Sr. (2)
- Richard, Alfred of Ogdensburg, New York (1)
- Richardson, George S. (2)
- Richardson, Gordon, & Associates of Pittsburgh, Pennsylvania (2)
- Riche, C.S (2)
- Richland Construction Co. (1)
- Richmond Bridge Corp. (1)
- Richmond Construction Co. of Advance, Missouri (1)
- Richmond Pike Co. (1)
- Richmond, Van R. (1)
- Ricketts, Ellsworth G. (1)
- Rickman, Federick (1)
- Ridout, Charles (1)
- Riebe, Herman (1)
- Rieth-Riley Construction Co. (1)
- Riffe, George (1)
- Riffe, John (1)
- Rigdon Bros. (2)
- Riggs-Sherman Co. (1)
- Righter Co. of Columbus, Ohio (1)
- Rights, William H. (2)
- Riley, S.J. of Columbus, Mississippi (1)
- Riley-Bailey Construction Co. of St. Louis, Missouri (2)
- Riser, R.S. (1)
- Ritter-Conley Manufacturing Co. of Pittsburgh, Pennsylvania (3)
- Riverside Bridge Co. of Wheeling, West Virginia (3)
- Riverside Bridge Co. of Martins Ferry, Ohio (3)
- Roads, Northwest (1)
- Roake, Theodore C. (5)
- Roanoke Bridge Co. of Roanoke, Virginia (7)
- Roanoke Iron & Bridge Works of Roanoke, Virginia (24)
- Roark, J.M. (2)
- Robbins, O.B. of Heber Springs, Arkansas (1)
- Robe Dekard (1)
- Robert Dunn & Co. (1)
- Robert Finley Laing (3)
- Robert H. Evans & Co. (1)
- Robert H. H. Hugman (3)
- Robert Lee Ringer (2)
- Robert R. Prann of San Juan (2)
- Robert Robbins (1)
- Robert W. Austin Co. (2)
- Robert and Andrew Baird (1)
- Roberts Supply Co. of Lima, Ohio (2)
- Robertson, Carmean & Bennett of Caruthersville, Missouri (2)
- Robertson, Lake of Brownwood, Texas (1)
- Robertson, Larry (1)
- Robertson, Winfred T. (1)
- Robie Construction Co. of Manchester, New Hampshire (1)
- Robinson & Steinman of New York, New York (10)
- Robinson & Young (1)
- Robinson, A.F. of Chicago, Illinois (1)
- Robinson, Albert A. of South Reading, Vermont (1)
- Robinson, Holton D. of Massena, New York (9)
- Robinson, Lewis (2)
- Rocca & Caletti of San Francisco, California. (9)
- Rocca & Calleti (1)
- Rocca, John (3)
- Rochester Bridge & Construction Co. of Rochester, New York (2)
- Rochester Bridge & Iron Works of Rochester, New York (6)
- Rochester Bridge Co. of Rochester, Indiana (55)
- Rock River Bridge & Dam Co. (2)
- Rockefeller, David of New York, New York (1)
- Rockport Granite Co. (1)
- Rockwell, Anderson and Co. (1)
- Rockwell, George W. (3)
- Rode, Hans H. (1)
- Rodenhouser & Smith (1)
- Rodgers & Hagerty, Inc. of New York City, New York (3)
- Rodgers Brothers Co. (1)
- Rodriguez, Dionicio of Toluca de Lerdo, Mexico (1)
- Roebling Bridge Co. (1)
- Roebling, Emily W. (1)
- Roebling, John A. (5)
- Roebling, Washington A. (3)
- Roebuck, David (1)
- Roehl & Steel of Knoxville, Tennessee (5)
- Roehl and Gervin (1)
- Roemheld & Gallery Co. of Chicago, Illinois (3)
- Roemheld, Jules E. (1)
- Rogers Iron Co. of Springfield, Ohio (1)
- Rogers, John S. (1)
- Rogers, Sadler (2)
- Rohrbaugh, M. (1)
- Rollins, J.G. (1)
- Roney, Nels (1)
- Root, Henry (1)
- Rosales + Partners of Boston, Massachusetts. (10)
- Rosales, Miguel of Guatemala (3)
- Rosewater, Andrew of Bukovan, Bohemia (1)
- Rosiek Construction Co. Inc. of Arlington, Texas (1)
- Rosmann and Goeller (2)
- Ross Brothers (1)
- Ross Construction of Austin, Texas (1)
- Ross Construction Co. of Los Angles, California (1)
- Ross, John A. (1)
- Ross, Joseph (1)
- Ross, L.J. of Caldwell, Idaho (1)
- Rousch, Stanley L. (1)
- Rouse Construction Co. of Cape Girardeau, Missouri (2)
- Roy L Williams (3)
- Roy L. Bair & Co (1)
- Roy Ryan & Sons Co., Inc. of Evanston, Indiana (1)
- Roy T. Earley Construction Co. of Tacoma, Washington (1)
- Ruckman-Hansen, Inc. of Fort Wayne, Indiana (1)
- Runyan, Eugene (1)
- Runyon Bridge Co. (2)
- Ruprecht Voirol Construction Co. of St Louis Missouri (1)
- Rusche, J.P. (1)
- Rusling, G. M. (1)
- Russ Mitchell, Inc. of Houston, Texas (5)
- Russell Bridge Co. (1)
- Russell Keys (1)
- Russell Simmons (1)
- Russell Standard Corporation (1)
- Russell, John (1)
- Russell, Josiah (1)
- Russell, Robert (3)
- Russell, Thomas B. (1)
- Russo, Joseph (1)
- Rust & Coolidge of Chicago, Illinois (5)
- Rust, Henry B. of Virginia (1)
- Rust, Thomas Edsall of Saginaw, Michigan (13)
- Rutherford & Brown of New York City, New York (1)
- Ryan & Keon of Boston, Massachusetts (1)
- Ryan, James T. of Muscatine, Iowa (1)
- Ryan-Parker Construction Co. of New York City, New York (1)
- Ryerson Co. of Chicago, Illinois (4)
- S -- S&R Construction (1)
- S&R Corporation of Lowell, Massachusetts (1)
- S&S Bridge Painting of Kerrville, Texas (1)
- S. & H. Howard & Co. (1)
- S. B. Twining Co. (1)
- S. Bopdy Br. (1)
- S. J. Cohen & Co. of Blytheville, AR (1)
- S. M. Siesel Co. of Milwaukee, Wisconsin (1)
- S. W. Chiles (1)
- S.A. Lindstrom Co. of Woodbury, New Jersey (1)
- S.C. Sachs Co. (1)
- S.G. Hunter Iron Works of Atlantic, Iowa (1)
- S.J. Cohen & Co. of Blytheville, Arkansas (1)
- S.J. Cohen Construction Co. of Blytheville, Arkansas (3)
- S.J. Groves & Sons Co. of Minneapolis, Minnesota (1)
- S.K. Jones Construction Company (2)
- S.M. Boomer (1)
- S.P. White & Co. (1)
- S.S. Mullen Inc. (2)
- S.W. Cohen Co. of Blytheville, Arkansas (1)
- SAILS Charter School of Sparta, Wisconsin (1)
- SRF Consulting Co. of Minneapolis, Minnesota (2)
- STACY (1)
- Saarinen, Eero of Kirkkonummi, Finland (3)
- Saarinen, Eliel of Rantasalmi, Finland (1)
- Safdie Rabines Architects of San Diego, California (1)
- Sahale LLC of Lake Forest Park, Washington (13)
- Saint Charles Bridge Co. (1)
- Salem, Winona and Southern Railway (1)
- Salle Construction Co. (1)
- Salmond Emmons III (1)
- Sammons, Robertson & Henry (1)
- Sampley, D. C. (1)
- Sams, Hal. J. (2)
- Samual Hamm & Sons (1)
- Samuel & Levi Hege (1)
- Samuel & Neef (1)
- Samuel Kraus Co. (1)
- Samuel M. Green Co. of Springfield, Massachusetts (1)
- Samuel Ramsey & Co. (1)
- Samuel Sewall, Jr. (1)
- San Francisco & North Pacific Railroad Tiburon Yard of Tiburon, California (1)
- San Francisco Bridge Co. of San Francisco, California (5)
- Sanborn, Joshua (1)
- Sand Springs Home (1)
- Sanders Construction Co. (1)
- Sanders Contracting Co. (2)
- Sands, E.F. (1)
- Sandy Kay Builders (1)
- Sanford & Brooks (2)
- Sanford Construction Co. (1)
- Sanitary District of Chicago (4)
- Santina & Thompson of Roseville, California (1)
- Sarnia Bridge Co. of Sarnia, Ontario, Canada (2)
- Satartia Bridge Co. (1)
- Saulpaw, G.W. (1)
- Savanna Construction Co. of Savanna, Illinois (1)
- Savannah-Altamaha Bridge Co. (1)
- Sawtell, Henry (1)
- Sawyer (1)
- Sawyer, F.M. (1)
- Sawyer, George (1)
- Sawyer, J.K. (1)
- Saylor, F. H. (1)
- Scaife Foundry & Machine Co. (1)
- Scales, George F. of Waterloo, Iowa (2)
- Schaaf, William (1)
- Schaffer Construction Co. (1)
- Schall, F.E. (1)
- Schauer Bros. of Wahpeton, North Dakota (1)
- Scheeler, B. A. (1)
- Scheibe, Julius (1)
- Scheider, Joseph (3)
- Scheidl, Charles (2)
- Scherzer Rolling Lift Bridge Co. of Chicago, Illinois (123)
- Schetrompf, Howard (1)
- Scheumann & Johnson (1)
- Schiffer Engineering (1)
- Schiffer Group Inc. of Traverse City, Michigan (1)
- Schillinger Bros. Co. of Columbus, Ohio (2)
- Schimberg, A. W. (3)
- Schimmle, Fred (1)
- Schinke, Max (2)
- Schlaich Bergermann & Partner of Stuttgart, Baden-Württemberg, Germany (2)
- Schmidt Construction Co. of Winfield, Iowa (6)
- Schmidt Construction Co. Peoria Illinois (1)
- Schmidt Engineering Co. (3)
- Schmidt, William H. of Woonsocket, Rhode Island (1)
- Schmitt Construction Co (1)
- Schneider, Charles C. (2)
- Schrieber Construction Co. (1)
- Schroeder, George E. (3)
- Schuler and McDonald (1)
- Schultz Bridge & Iron Works of McKees Rocks, Pennsylvania (4)
- Schumann, Kerry (1)
- Schuster & Jacob (3)
- Schutt, R.L. (1)
- Schuylkill Bridge Co. (1)
- Schwaab, Augustus (2)
- Schwager Davis Inc. of San Jose, California (1)
- Schwartz, Daniel (1)
- Scivally, Dennis (1)
- Scofield Engineering Co. (1)
- Scothern & Albrecht of Early, Iowa (1)
- Scott Bridge Co. of Opelika, Alabama (2)
- Scott Glickenhaus (1)
- Scott, Dwight (1)
- Scott, J. W. of Flemington, New Jersey (4)
- Scott, Lisbon (1)
- Scott, W.E. (1)
- Scoville, James W. (1)
- Scully, E.M. (1)
- Seaboard Construction Co. of Philadelphia, Pennsylvania (1)
- Seabrook, John (1)
- Seabrook, Thomas (1)
- Sears, Benjamin (1)
- Seattle Bridge Builders (1)
- Seattle City Light (1)
- Seawell and Co. (1)
- Security Bridge Co. of Billings, Montana (17)
- Seeds & Derham of Philadelphia, Pennsylvania (2)
- Seely, Homer R. (1)
- Seelye Stevenson Value & Knecht (1)
- Seevers Manufacturing Co. of Oskaloosa, Iowa (7)
- Selby Bridge Co. (1)
- Seneca Jones Timber Co. of Eugene, Oregon (1)
- Senior & Palmer, Inc. (1)
- Sentman, Col. W. (1)
- Serrell, Edward W. of London, England, United Kingdom (2)
- Service Construction Co. of Poplar Bluff, Missouri (2)
- Settlemeyer, Elmer (1)
- Severtson, S. (1)
- Seybert, A.S. (1)
- Shade, Killer of Phoenix, Arizona (1)
- Shadle, H. H. (1)
- Shaid Contracting Co. (1)
- Shailer & Schniglau Co. of Chicago, Illinois (3)
- Shand, A.C. (3)
- Shand, Alexander C. (1)
- Shannon, Wernwag and Kinkead (3)
- Shappert Engineering Co. (2)
- Shard, A.C. (1)
- Sharp, Walter (1)
- Sharpe, W. L. of Memphis, Tennessee/Collierville, Tennessee (2)
- Sharpsville Steam Boiler Works (1)
- Shatto Construction (1)
- Shattuck & Edinger Co. of Los Angeles, California (1)
- Shatzer, David (1)
- Shaw and Wolke (1)
- Shaw, Edward S. of Boston, Massachusetts (8)
- Shaw, F. H. (7)
- Shaw, Frank H. (1)
- Shaw, John C. (1)
- Shaw,, F.H. (2)
- Sheeler, BA (2)
- Sheely, Charles G. of Denver, Colorado (8)
- Sheffield, F. D. (1)
- Sheffler Bridge Co. of Pittsburgh, Pennsylvania (1)
- Sheldon & Savannah Jewett (1)
- Shepard & Maxwell Bros. (1)
- Shepherd, Moses (1)
- Shepley, Rutan and Coolidge (1)
- Sheppard, Winston & Co. of St. Paul, Minnesota (1)
- Sherman Bryan Jennings (1)
- Sherman, David T. (3)
- Sherman, E.S. (9)
- Sherman, William (3)
- Sherrill, J.D (1)
- Shiffler Bridge Co. of Pittsburgh, Pennsylvania
- Shimmick Construction (1)
- Shimmick Construction Co. (1)
- Shinshichi Nakatani (1)
- Shipman & Son of Springield Centre, New York (1)
- Shipman, James W. (1)
- Shipyard, Lanteri of Pittsburg, California (1)
- Shirk, Jacob (1)
- Shive-Hattery, Inc. of Cedar Rapids, Iowa (2)
- Shoemaker & Haaland of Coralville, Iowa (3)
- Shoemaker Bridge Co. of Pottstown, PA (1)
- Shoemaker, Eyre of Philadelphia, Pennsylvania (2)
- Shoemaker, L. H. (2)
- Shohola and Barryville Bridge Co. (1)
- Shons, W.H. (3)
- Shrake, John (2)
- Shuck-Britson, Inc. of Des Moines, Iowa (1)
- Shufflebarger, F.D. of Albuquerque, New Mexico (4)
- Shultz Bridge & Iron Co. of Pittsburgh, Pennsylvania (1)
- Sichar, Mariano of Ponce, Puerto Rico (1)
- Silas Hussey, Jr. (1)
- Simmons, Daniel (1)
- Simon de Graff of Syracuse, New York (11)
- Simone Jaffe Collins (1)
- Simpson Timber Co. (1)
- Simpson, Mr. (1)
- Simpson, Paul D. of Seal Harbor, Maine (4)
- Simpson-Parker Construction Co. of Appleton, Wisconsin (1)
- Sims, A.V. of Iowa City, Iowa (1)
- Sinclair, O. of Kankakee, Illinois (1)
- Singstad & Kehart (1)
- Singstad, Ole of Agdenes, Norway (2)
- Sitts and Hill Engineers (2)
- Sivyer, B.E. (1)
- Six Companies Inc. (1)
- Skanska AB of Stockholm, Sweden (3)
- Skanska Kiewit Ecco III Joint Venture (1)
- Skeels & Graham Co. of Tucson, Arizona (2)
- Skerret, Ricardo of San Juan, Puerto Rico (1)
- Skully Steel Co. (1)
- Slatington Rolling Mill Co. of Slatington, Pennsylvania (2)
- Slattery, Thomas (1)
- Slattum, Ardell (1)
- Slayden Construction (2)
- Slee, J.W. (1)
- Smeeth Foundry Co. of Chicago, Illinois (1)
- Smith & Brooks Engineers (1)
- Smith & Greer (1)
- Smith Bridge Co. of Toledo, Ohio (66)
- Smith Construction Co. of Philadelphia, Pennsylvania (1)
- Smith and Erastus Bussell (1)
- Smith and Nichols (1)
- Smith, Augustus (2)
- Smith, C.P. (1)
- Smith, C.R. (1)
- Smith, Charles C. (1)
- Smith, Charles F. (1)
- Smith, Charles M. of Thermopolis, Wyoming (2)
- Smith, Craven (2)
- Smith, Dexter R. (5)
- Smith, E.R. (1)
- Smith, Edward (1)
- Smith, Edward F. (1)
- Smith, George W. (1)
- Smith, Griffith D. (1)
- Smith, I. E. (1)
- Smith, I.E. (1)
- Smith, Isaac (1)
- Smith, Isaac W. (1)
- Smith, J.R. of Springfield, Massachusetts (1)
- Smith, James M. (7)
- Smith, Jesse O. (1)
- Smith, John W. (1)
- Smith, Latrobe, & Co. of Baltimore, Maryland (2)
- Smith, McCormick Co. (1)
- Smith, Raymond G. (3)
- Smith, Ripley & Co. (1)
- Smith, S.H. (1)
- Smith, W.F. (1)
- Smith, William C. (1)
- Smith-Byers-Sparks Co. (1)
- Smith-Holmes-Burridge-Sparks of Houghton, Michigan (1)
- Smith-Sparks Construction Co. (1)
- Smolen Engineering of Jefferson, Ohio (1)
- Smolkant, A. (1)
- Smythe, J.V. (1)
- Snare & Triest Co. of New York City, New York (3)
- Snook & Sons (1)
- Snook And Sons (1)
- Snook Brothers (1)
- Snyder & Johnson of Humbolt, Iowa (8)
- Snyder & Kramer of Dayton, Ohio (1)
- Société d'Entreprises et des Constructions des Colonies Espagnoles (4)
- Sooysmith & Co. of New York (7)
- Soper, Ellis (1)
- Sorensen, Miller (4)
- Sorensen, Walter (2)
- Sorrento, Joe (1)
- Sosthenes Behn (1)
- Soule Steel Co. (3)
- South Bend Foundry Co. of South Bend, Indiana (1)
- South Dakota State Highway Commission (1)
- South Shore Cement Works (1)
- Southern Bridge Co. of Birmingham, Alabama (4)
- Southern Construction Co. of Burlington, North Carolina (1)
- Southern Pacific Transportation Co. Oakland Shipyard of Oakland, California (2)
- Southern Railways (1)
- Southwest Engineering & Construction Co. (1)
- Southwestern Bridge & Culvert Co. of Oklahoma City, Oklahoma (2)
- Southwestern Bridge Co. of Joplin, Missouri (2)
- Spandau, Richard C. of Danville, Illinois (1)
- Sparks & Kinney (2)
- Sparta High Point Charter School of Sparta, Wisconsin (1)
- Speed Fab Crete of Kennedale, Texas (2)
- Speer, Oran of Alvord, Texas (1)
- Spencer & Associates, Inc. of Jackson, Mississippi (1)
- Speria Construction Co. (1)
- Spink Corp, The of Sacramento, California (1)
- Sprague & Henwood, Inc of Scranton, Pennsylvania (1)
- Spraker, George (1)
- Sprigg, John G. (1)
- Springfield Bridge & Iron Co. (2)
- Springtown Bridge Co. (1)
- Spuck Iron & Foundry Co. of St. Louis, Missouri (1)
- St. Joseph Bridge & Iron Co. of St. Joseph, Missouri (2)
- St. Joseph Structural Steel Co. (2)
- St. Louis Bridge & Iron Co. of St. Louis, Missouri (14)
- St. Louis Bridge & Supply Co. (2)
- St. Louis Construction Co. (1)
- St. Louis County Hwy. Dept. (1)
- St. Louis Structural Steel Co. of St. Louis, Missouri (3)
- St. Paul & Tacoma Lumber Co. of Tacoma, Washington (1)
- St. Paul Foundry Co. of St. Paul, Minnesota (1)
- Stackpole, Thomas (1)
- Stacy & Witbeck (2)
- Stagg, Joseph (1)
- Stalling Bros. (1)
- Stan Graton 3G Construction (1)
- Standard Bridge Co. of Omaha, Nebraska (28)
- Standard Construction Co. of Houston, Texas (2)
- Standard Engineering & Contracting Co. of Toledo, Ohio (4)
- Standard Paving Co. of Tulsa, Oklahoma (3)
- Standard Reinforced Concrete Co. of Indianapolis, Indiana (2)
- Standifer-Clarkson Co. (1)
- Standish Engineering Co. (1)
- Stanley Barber Construction Co. (1)
- Stanley Consultants of Muscatine, Iowa (2)
- Star Iron & Steel Co. (1)
- Starbuck Iron Works (1)
- Stark Construction Co. of Cedar Rapids, Iowa (1)
- Starkey & Boartz (1)
- State Highway Department (23)
- State Road Dept (1)
- State of California (2)
- State of California Department of Public Works (1)
- State of Illinois (5)
- State of Indiana (1)
- State of New York Department of Public Works Division of Highways (1)
- State of North Carolina (1)
- State of Tennessee Highway Department (2)
- Stauffer, J. F. (1)
- Steadfast Bridges of Ft. Payne, Alabama (10)
- Stearns, Frederic P. (1)
- Stebbinger Bros. (1)
- Stebbins, M.H. (2)
- Steece, Emmett (1)
- Steel & Lebby Bridge Co. of Knoxville, Tennessee (10)
- Steel & Roehl Bridge Co. (1)
- Steel and Lebby (1)
- Steel, BACH of Holt, Michigan (11)
- Steel, BICO (1)
- Steel, Bristol of Davison, Mississippi (1)
- Steel, US of Pittsburgh, Pennsylvania (7)
- Steelman Construction Co (1)
- Steffens, William F. (1)
- Steffensen, H. S. of Seattle, Washington (1)
- Steiger, F. A. (3)
- Stein Construction Co. of Milwaukee, Wisconsin (1)
- Steiner & Pollock (1)
- Steinhagen, Gustav of Mecklenburg-Vorpommern, Germany (2)
- Steinman, David B. of New York, New York (13)
- Stem, Jacob (1)
- Stephens & Bolderston (1)
- Sterling Bridge Construction Co. (4)
- Stern, I.F. (1)
- Steve Zablotny (1)
- Steven Brothers (1)
- Stevens, George (8)
- Stevenson, Hensen K. (1)
- Steward & McDermott (1)
- Stewart & March Inc. (1)
- Stewart & McDermott (1)
- Stewart Engineering Corp. of New York City, New York (1)
- Stewart, Daniel of Saratoga, New York (1)
- Stewart, Shirreffs & Co. (1)
- Stewart-Kerbaugh-Shanley Co. (1)
- Steyer, Michael (1)
- Stier-March Contracting Co. of New York City, New York (1)
- Stigler & Welch (1)
- Stoddard, Raymond F. (1)
- Stokes & Whittingham (1)
- Stolte, Inc. of Los Angeles, California (1)
- Stone & Webster of Boston, Massachusetts (9)
- Stone City Steel Construction Co. of Bedford, Indiana (1)
- Stone, Amasa (1)
- Stone, Boomer & Boyington of Davenport, Iowa (5)
- Stone, Charles of St. Paul, Minnesota (2)
- Stone, Everett (1)
- Stone, J.H. (1)
- Stone, Melvin B. of Minneapolis, Minnesota (1)
- Stone, Stephen (1)
- Stoner, David (1)
- Stoner, Glen E. (3)
- Stonner & Deering of St. Louis, Missouri (1)
- Stoops & Williamson of Clayton County, Iowa (1)
- Storrs & Storrs (2)
- Storrs Engineering Co. (1)
- Story, George (1)
- Story, Isaac M. (1)
- Stoughton, Charles W. of New York, New York (3)
- Stout, D.Y. (1)
- Stover, Harvey D. (1)
- Stowell, Charles F. (3)
- Stoyer, A.D. of Shillington, Pennsylvania (1)
- Straits Construction Co. (1)
- Strasser & Schlecht of Bellevue, Iowa (2)
- Strauch, Adolph (2)
- Strauss Bascule Bridge Co. of Chicago, Illinois (172)
- Strauss Engineering Co (1)
- Strauss, Joseph (10)
- Stresenreueter Brothers Co. of Chicago, Illinois (1)
- Striker, A.C. (4)
- Strobel Engineering of Chicago, Illinois (1)
- Strobel Steel Construction Co. of Chicago, Illinois (22)
- Strobel, Charles L. (5)
- Strohl, R.M. (1)
- Strom Construction Co. (1)
- Strong & Grant of Springville, Utah (5)
- Structural Steel Products Corporation (1)
- Strum, L. E. (1)
- Stuart, H.B. (1)
- Studenroth, S. Z. (1)
- Studenruth, Samuel Z. (1)
- Stull, Lonnie (1)
- Stupp Brothers Bridge & Iron Co. of St. Louis, Missouri (89)
- Sturgis, Nelson H. (1)
- Sue-Jac, Inc. of Decatur, Alabama (1)
- Suleski, A.E. (1)
- Sullivan & Sullivan (2)
- Sunbury Bridge Co. (2)
- Superior Bridge Co. of Lewiston, Idaho (1)
- Superior Steel Inc. of Duluth, Minnesota (1)
- Susquehanna & Union Bridge Co. (1)
- Sutton, David (1)
- Sutton, Kennerly & Associates Engineering of Greensboro, North Carolina (1)
- Svensson, Holger S. of Stuttgart, Baden-Württemberg, Germany (2)
- Sverdrup & Parcel of St. Louis, Missouri (26)
- Sverdrup Civil, Inc of St. Louis, Missouri (1)
- Sverdrup, Leif J. (2)
- Swagner, John H. (1)
- Swain, George F. (2)
- Swallows, A. W. (1)
- Swallows, A.W. (1)
- Swartz, H (1)
- Sweat, Barton J. of Cedar Rapids, Iowa (1)
- Sweeney, J.W. (2)
- Sweet, Elnathan of Cheshire, Massachusetts (1)
- Swenson, N.A. (1)
- Swiger, Soloman (1)
- Swingle, J.A. of Zanesville, Ohio (1)
- Swisher Fosnaugh Inc. of Columbus, Ohio (1)
- Sykes, C. C. (1)
- Synder Engineering Co. (1)
- Syroka & Associates of Des Moines, Iowa (1)
- T -- T. & S. White of New Brighton, Pennsylvania (1)
- T. J. McCarthy of Davenport, Iowa (1)
- T. Saulpaugh & Co (1)
- T. Stuart & Sons of Watertown, Massachusetts (2)
- T. T. Polich & Associates (1)
- T.A. Gillespie Co. of Pittsburgh, Pennsylvania (1)
- T.A. Loving Co. of Goldsboro, North Carolina (7)
- T.B. White & Sons of New Brighton, Pennsylvania (3)
- T.F. Pyott Bridge Co. of Chattanooga, Tennessee (1)
- T.Y. Lin International of San Francisco, California (7)
- Tachau, Herman (1)
- Tacoma Narrows Constructors (1)
- Taft, Zadoc (1)
- Taggart Construction Co. (1)
- Tammen & Bergendoff (1)
- Tampa Marine Corporation of Tampa, Florida (1)
- Tapp, H.W. (1)
- Tappan Zee Constructors, a design-build LLC composed of Fluor Corporation, American Bridge Co., Granite Construction Northeast and Traylor Bros (1)
- Tappan, C. (1)
- Tarrant County Highway Department (1)
- Tasker, Henry (1)
- Tasker, James of Claremont, New Hampshire (9)
- Tate Daly (1)
- Taylor & Majors of Ardmore, Oklahoma (1)
- Taylor & Murphy Construction Co. of Asheville, North Carolina (2)
- Taylor, F. M. (1)
- Taylor, George B. of Berlin, Connecticut (1)
- Taylor, Robert (1)
- Taylor, Samuel (1)
- Taylor-Fitcher Steel Construction Co. (1)
- Teague, Nall, & Perkins of Fort Worth, Texas (1)
- Tech, Zenith (3)
- Teleweld, Inc. of Chicago, Illinois (1)
- Temple, E.B. (3)
- Templeman, John of District of Columbia (1)
- Teng & Associates Inc. of Wauwatosa, Wisconsin (2)
- Tennessee Bridge & Steel Co. of Johnson City, Tennessee (1)
- Tennessee Department of Transportation (3)
- Tennessee Highway Department (2)
- Tennessee Highway Dept. (1)
- Tennessee State Highway Department (19)
- Tennessee Valley Authority (9)
- Tenney, Chauncey (1)
- Terrell Bartlett Engineers Inc., The of San Antonio, Texas (6)
- Terror Haute Drawbridge Co. (1)
- Terry & Tench Construction Co. of New York City, New York (6)
- Teufel & Carlson (2)
- Texas Bridge Co. (1)
- Texas Construction Co. (1)
- Texas Highway Department (19)
- Thatcher, Edwin of New York City, New York (5)
- The Bridge Co. (1)
- The Champion Bridge Co. (1)
- The Construction Co. (5)
- The Guerber Engineering Co. (1)
- The Harlan Co. (1)
- The Harrisburg Bridge Company (1)
- The LeDoux Ehrman Co. (1)
- The Phoenix Bridge Co. (2)
- The Southern Co. of Birmingham, Alabama (1)
- Theban, J.G (1)
- Theo. Kupfer Iron Works Inc. of Madison, Wisconsin (1)
- Thomas & Post (3)
- Thomas A. Bell Construction Co. of St. Louis, Missouri (1)
- Thomas A. Hardman (5)
- Thomas F Gaylord (1)
- Thomas Freeman (1)
- Thomas Hart (1)
- Thomas Hillenberg (1)
- Thomas Kelly & Sons, Inc. of Winnepeg, Manitoba, Canada (1)
- Thomas Maddock (1)
- Thomas McNally Construction Co. of Pittsburgh, Pennsylvania (1)
- Thomas Staunton Co. (1)
- Thomas, Chauncey (1)
- Thomas, Dana E. of Iowa City, Iowa (1)
- Thomas, J.C. (1)
- Thomas, R. L. (1)
- Thomas, William M. (5)
- Thompson Brothers (1)
- Thompson, C.G. (1)
- Thompson, H.B. (1)
- Thompson, J.H. (1)
- Thompson, Mahlon (1)
- Thompson, Matthew (2)
- Thompson, Thomas (1)
- Thompson-Starett Co. (1)
- Thor Construction Co. of Cedar Falls, Iowa (1)
- Thornburgh, J.H. (1)
- Thorsen, Harry (2)
- Thos. Storey Engineers Ltd of Openshaw, Greater Manchester, England, United Kingdom (1)
- Thurlow of Chester, Pennsylvania (2)
- Tibbets, Pleasant, Green & Beckman (2)
- Ticonic Foot Bridge Co. (1)
- Tidewater Construction Co. of Chesapeake, Virginia (5)
- Tilseth, A.E. (1)
- Timber Framers Guild (1)
- Timber Structures Inc. of Portland, Oregon (1)
- Tippett & Wood of Phillipsburg, New Jersey (1)
- Titus, William J. (1)
- Tobin, John D. of Portland, Oregon (3)
- Todd & Reid (1)
- Toledo Bridge & Crane Co. of Toledo, Ohio (7)
- Toledo Bridge Co. of Toledo, Ohio (33)
- Toledo Shipbuilding Co. of Toledo, Ohio (1)
- Toledo-Massillon Bridge Co. of Toledo, Ohio (9)
- Toltz, King & Day of St. Paul, Minnesota (1)
- Tompkins, Nelson (1)
- Tompson, G.M. (1)
- Tomás Carro of Orocovis, Puerto Rico (1)
- Tonawanda Engineering Corp. (2)
- Tony Gee & Partners LLP of Esher, Surrey, England, United Kingdom (1)
- Topeka Bridge & Construction Co. of Topeka, Kansas (5)
- Topeka Bridge & Iron Co. (28)
- Topeka Bridge & Iron Works (1)
- Torbert, Vance W. of New York City, New York (1)
- Torkelson, M.W. (1)
- Totti, Etienne of Yauco, Puerto Rico (2)
- Towle, John W. (1)
- Town, Ithiel (2)
- Townsend, Herman F. (1)
- Townsend, Soloman (1)
- Townsend, T.B. of Zanesville, Ohio (3)
- Townsend-Shuttleworth-Ballmer Co. of Lansing, Michigan (1)
- Township Supply Co. of St. Louis, Missouri (2)
- Tracy, C.W. (1)
- Tracy, Fred (1)
- Transit Construction Co. of Mt. Vernon, New York (1)
- Travis Burroughs (1)
- Traylor Brothers Inc. of Evansville, Indiana (11)
- Treadaway, S. J. of Dallas, Texas (1)
- Tremont Bridge & Construction Co. (1)
- Tremont Bridge and Concrete Design (2)
- Trenton Iron & Steel Co. of Trenton, New Jersey (1)
- Trenton Locomotive & Machine Works of Trenton, New Jersey (1)
- Trenton Locomotive and Machine Works (1)
- Tri-State Construction (1)
- Trinity Industries Inc. of Chicago Heights, Illinois (1)
- Trollinger, Benjamin of Haw River, North Carolina (1)
- Trout, Everett (1)
- Trout, Hiram B. (1)
- Trumbull Corporation of West Mifflin, Pennsylvania (1)
- Trussed Concrete Steel Co. of Detroit, Michigan (5)
- Trygve Hoff & Associates of Cleveland, Ohio (1)
- Tubbs, N.J. (1)
- Tucker, David A. (1)
- Tudor Engineering Co. of San Francisco, California (4)
- Tudor, Ralph A. (1)
- Tuller Construction Co. of Red Bank, New Jersey (1)
- Tullock, A.J. of Leavenworth, Kansas (16)
- Tupper, Col Lorenzo (1)
- Turneaure, F.E. (1)
- Turner Construction Co. of New York City, New York (4)
- Turner, Claude Allen Porter of Lincoln, Rhode Island (7)
- Turner, Edmund K. (1)
- Turner, George H. (4)
- Turner, L.A. (2)
- Turner, M.P. (1)
- Turner, Nelson (1)
- Tutor Perini Corp. of Los Angeles, California (2)
- Tweedy, R.B. (1)
- Twohy Brothers of Spokane, Washington (2)
- Tyrell, H.W. of Topeka, Kansas (2)
- Tyson, Frank D. (2)
- U -- U. S. Steel Products Co. (1)
- U.G.I. Contracting Co. of Philadelphia, Pennsylvania (2)
- U.S. Army of Washington, D.C. (12)
- U.S. Army Corps of Engineers of Washington, D.C. (32)
- U.S. Army Spruce Production Division (1)
- U.S. Bridge/Ohio Bridge Corp. of Cambridge, Ohio (13)
- U.S. Bureau of Public Roads of Washington, D.C. (23)
- U.S. Bureau of Reclamation of Washington, D.C. (6)
- U.S. Department of Agriculture of Washington, D.C. (4)
- URS Corporation of San Francisco, California (2)
- US Forest Service of Washington, D.C. (13)
- US Lighthouse service (2)
- US coast Guard (1)
- USDA Forest Products Laboratory of Madison, Wisconsin (1)
- Ulince of France (4)
- Ulysses Sumner Grant of Wyoming (1)
- Unadilla Laminated Products of Sidney, New York (1)
- Underground, Tapani (1)
- Union Bridge & Construction Co. of Kansas City, Missouri (21)
- Union Bridge Co. of Buffalo, New York & Athens, Pennsylvania (55)
- Union Bridge Co. of Portland of Portland, Oregon (12)
- Union Construction Co. of Ogden, Utah (1)
- Union County (1)
- Union Engineering & Construction Co. (1)
- Union Industrial Contractors, Inc. of Ashtabula, Ohio (1)
- Union Iron & Bridge Co. of Seattle, Washington & Portland, Oregon (2)
- Union Iron Mills (1)
- Union Ironworks of San Francisco, California (1)
- Union Lumber Co. (2)
- Unit Construction Co. (1)
- Unit Structures of Magnolia, Arkansas (1)
- United Construction Co. of Albany, New York (21)
- United Contracting Co. (1)
- United Engineering & Construction (1)
- United Railways (1)
- United States Bridge Co. of Boise, Idaho (3)
- United States Steel Products Co. of San Francisco, California; Los Angeles, California; Portland, Oregon; Seattle, Washington. (1)
- United Verde Copper Co. of Jerome, Arizona (1)
- Universal Bridge Co. (2)
- Universal Construction Co. of Chicago, Illinois (1)
- Universal Structural, Inc. of Vancouver, Washington (1)
- University of Iowa Laboratory for Advanced Construction Technology of Iowa City, Iowa (1)
- Unknown (34)
- Unknown Philadelphia company (1)
- Unknown StL&HRR contractor (1)
- Unknown iron firm from Pittsburgh, PA (1)
- Unknown lumber firm from Green Bay, WI (1)
- Updyke, George (1)
- Utah Construction Co. of Ogden, Utah (9)
- Utah Crane & Rigging (1)
- Uvalde Construction Co. of Dallas, Texas (5)
- V -- VJ Engineering of Coralville, Iowa/Cedar Falls, Iowa (3)
- VSL International Ltd. of Köniz, Canton of Bern, Switzerland (1)
- Valleau, William (1)
- Van Camp Brothers (1)
- Van Fossan & Noble (1)
- Van Vranken, George W. (1)
- Vanasse Hangen Brustlin, Inc. (1)
- Vang Construction Co. of Cumberland, Maryland (3)
- Variety Iron Works of Cleveland, Ohio (12)
- Varner, J.A. (2)
- Vaughan Construction Co. of Roanoke, Virginia (2)
- Vaughan, Charles (1)
- Vaughn & Melton of Middlesboro, Kentucky (1)
- Vaughn Construction Co. (1)
- Vaux, Calvert of London, England, United Kingdom (14)
- Veater & Davis (1)
- Vermillion Brothers Contractors (1)
- Vermont Agency Of Transportation (1)
- Vermont Construction Co. of St. Albans, Vermont (11)
- Vermont Department of Transportation (1)
- Vermont Marble Co. (1)
- Vernard, Anderson. (1)
- Vierling Steel Works of Chicago, Illinois (14)
- Viking Construction Co. Inc. of Rancho Cordova, California (1)
- Vinall, Alfred of Davenport, Iowa (2)
- Vincennes Bridge Co. of Vincennes, Indiana (105)
- Vincennes Co. (1)
- Vincennes Steel Corp. of Vincennes, Indiana (4)
- Vincent, C.A. (1)
- Vinson & Pringle of Phoenix, AZ (1)
- Vinson Construdon Co. of Phoenix, Arizona (1)
- Vint, Thomas C. (1)
- Vipond & Walker of Kansas City, Missouri (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 (51)
- Virginia Department of Highways (4)
- Virginia Turnpike Co. (1)
- Virginia and Maryland Bridge Co. (1)
- Vogt & Contant SW Corp. of Little Rock, Arkansas (2)
- Vogt, Josef of Guttenberg, Iowa (1)
- Volkert, Inc. of Mobile, Alabama (1)
- Volunteers (1)
- Von Emperger, Frederick of Beroun, Central Bohemia, Czech Republic. (2)
- Vose, George L. (1)
- Vulcan Road Machine Co. of Charles Town, West Virginia (1)
- W -- W A Leach (1)
- W&L Engineering (1)
- W. A. Bechtel Co. of San Francisco, California (2)
- W. C. Babcock Grain Co. (1)
- W. C. Crebo of Muskegon, Michigan (1)
- W. Denney Pate (1)
- W. H. Hinman Inc. of North Anson, Maine (4)
- W. H. Murphy & Sons (1)
- W. Hasell Wilson (1)
- W. M. Fife & Son (4)
- W. M. Pickett & Co. (1)
- W. Marshall & Sons (1)
- W. P. Wampler, President of the Bridge Co.. (1)
- W. W Winslow (1)
- W. W. Clyde & Co. of Springville, Utah (3)
- W. W. Griffin of Atlanta, Georgia (1)
- W. W. Heath (1)
- W.A Overhiser (1)
- W.A. Ross Construction Co. of Kansas City, Missouri (6)
- W.C. Hopkins (2)
- W.C. Howton Co. of Birmingham, Alabama (1)
- W.C. Johnson Belleville, IL (1)
- W.C. McNeely Construction Co. (1)
- W.D. Johnson (1)
- W.D. Steinbach Sons of Lewistown, Pennsylvania (1)
- W.E. Angier (2)
- W.E. Callahan Construction Co. (1)
- W.E. Turner & Co (1)
- W.E.Pickens (1)
- W.F. Merritt of Galveston, Texas (1)
- W.G. Carnes (1)
- W.G. Watt Construction Co. (1)
- W.H. & G.H. Turner (1)
- W.H. & L.E. Truesdell of Belvidere, Illinois (1)
- W.H. Crawford & Son (1)
- W.H. Grammer & Son (1)
- W.H. Groome Son (1)
- W.H. Hoyt (1)
- W.H. Knapp Co. (1)
- W.H. Witt Co. of Seattle, Washington (3)
- W.H.Moore & Bros. of Georgia (1)
- W.J. Burns Co. of Syracuse, New York (2)
- W.J. Hobson (1)
- W.J. Meagher & Sons of Bay City, Michigan (2)
- W.J. Menefee Construction Co. (3)
- W.J. Watson & Co. of Indianapolis, Indiana (2)
- W.L. Hailey Inc. (1)
- W.L. Stebbings (1)
- W.M (1)
- W.M. Pickett & Co. (1)
- W.Merrill, Hiram (1)
- W.N. Flynt Granite Co. (1)
- W.P. McGeorge & Co (1)
- W.P. Townsend Construction Co. (1)
- W.R. Rehorn (1)
- W.R. Smith. Jr. (1)
- W.S. Barstow & Co. of New York City, New York (1)
- W.S. Kinnear (1)
- W.T. Butler Co. (1)
- W.W. Boxley & Co. of Roanoke, Virginia (3)
- W.W. White Steel Construction Co. (1)
- WALKER & CHASE/J D MCGEE (1)
- WM Barclay (2)
- WPA (2)
- Wabash Bridge & Iron Works of Wabash, Indiana (4)
- Wabash Bridge Co. of Wabash, Indiana (1)
- Wabash-St. Charles Bridge Co. (2)
- Wabasha-Nelson Bridge Co. (1)
- Waddell & Hardesty (4)
- Waddell & Harrington of Kansas City, Missouri (44)
- Waddell & Hedrick of Kansas City, Missouri (9)
- Waddell & Son of Kansas City, Missouri (3)
- Waddell, J.A.L. of Port Hope, Canada (21)
- Wadell & Son (1)
- Wagal, George A. (1)
- Wagle, E. H. (1)
- Wagman Construction, Inc. of York, Pennsylvania (1)
- Wagman, E. M. (1)
- Wagman, G. A. of York, Pennsylvania (1)
- Wagner Murray Architects, P.A. of Charlotte, North Carolina (1)
- Wakefield & Jacobson (1)
- Wakefield, Robert of Portland, Oregon (6)
- Waldo, Mark (2)
- Walker Brothers of Charleston, West Virginia (2)
- Walker, Abernethy, Dudley, & Co. (1)
- Walker, F.B. (1)
- Walker, Joseph H. (1)
- Wall, Zimri (2)
- Wallace Bridge & Structural Steel Co. of Seattle, Washington (5)
- Wallace Equipment Co. (1)
- Wallace Roberts & Todd, LLC of Philadelphia, Pennsylvania (1)
- Wallace, G. H. (1)
- Wallace, John (1)
- Wallace-Coates Engineering Co. (1)
- Walling, Haralson, & Adams of Houston, Texas (1)
- Walsh & Thomas (1)
- Walsh Construction Co. of Chicago, Illinois (2)
- Walsh Construction Co. of Davenport, Iowa (7)
- Walsh's Holyoke Steam Boiler Works of Holyoke, Massachusetts (1)
- Walsh, J.M. (1)
- Walsh, James (1)
- Walsh-Burney & Moore (1)
- Walter E. Emery (1)
- Walter L Woodward, engineer (1)
- Walter Sharp Bridge Co. (9)
- Walter Toebe Co. (2)
- Walters & Son (5)
- Walters Brothers (6)
- Walton, H.B. (1)
- Wamego Sand Co. of Wamego, Kansas (1)
- Wander & Mason (1)
- War Assets Administration (1)
- Ward & Teslow of Decorah, Iowa (1)
- Ward & Tully, Inc. of Browns Station, New York (3)
- Ward & Ward, Inc. (2)
- Ward & Weighton of Sioux City, Iowa (2)
- Ward Brothers (1)
- Ward Engineering Co (1)
- Ward P. Webber (1)
- Ward, John of Clinton, Iowa (1)
- Ware Co. of El Paso, Texas (1)
- Warner & Mad--- (1)
- Warner, John of Rock Island, Illinois (1)
- Warren & Wetmore-designers (1)
- Warren Brothers Co. of Boston, Massachusetts (1)
- Warren Spruce Co. (1)
- Washburn, Henry (1)
- Washer, William T. (19)
- Washington Bridge Co. (2)
- Washington Department of Highways (1)
- Washington Portland Cement Co. (1)
- Washington State Department of Transportation (1)
- Washington Water Power Co. (1)
- Washington Water Power Co., The (1)
- Waterloo Construction Co. of Waterloo, Iowa (3)
- Watkins & Hardaway of Birmingham, Alabama (1)
- Watkins, V. (1)
- Watson Manufacturing Co. of Paterson, New Jersey (4)
- Watson, A. J. (1)
- Watson, John of Cambridgeshire, East Anglia, England, United Kingdom (1)
- Wauna Toll Bridge Co. (1)
- Wausau Iron Works of Wausau, Wisconsin (14)
- Wayland Bridge Co. (2)
- Wayne Brothers, Inc. of Davidson, North Carolina (1)
- Weand, O.W. (1)
- Weatherford Machine & Foundry Co. (1)
- Weaver, Caspar (2)
- Weaver, George (2)
- Weaver, John (7)
- Weaver, Jonathan (1)
- Weaver, Pearly (1)
- Weaver, Walter (1)
- Weber, Peter (1)
- Webster, George S. of Philadelphia, Pennsylvania (5)
- Weden, D.B. (1)
- Weekly Brothers Inc. of Idleyld Park, Oregon (1)
- Weeks & Day of San Francisco, California (1)
- Weikel, Oscar (1)
- Weikel, Ray (1)
- Welch, Berne of Peru, Indiana (1)
- Welch, J. (1)
- Welden Brothers Construction Co. of Iowa Falls, Iowa (7)
- Welding Engineers, Inc. (1)
- Welding, Stinger of Coolidge, Arizona (1)
- Weller, G.H. (1)
- Wellman, McDowell of Cleveland, Ohio. (1)
- Wells, Edward (1)
- Wells, John H. (5)
- Wells, Malcolm (1)
- Wendell Phillips Brown of Cleveland, Ohio (2)
- Wendler Engineering (1)
- Wendling, Otto of Muscatine, Iowa (3)
- Wentworth, Charles C. of Newport News, Virginia (1)
- Wentzel, L.M. (2)
- Werderitsch, Jace of Iowa City, Iowa (1)
- Werling Steel Works (1)
- Wernwag, Louis of Reutlingen, Baden-Württemberg, Germany (6)
- Wesley Cameron architect. (1)
- West & Jamison (1)
- West Coast Construction Co. (2)
- West Coast Steel Works (6)
- West Counties Construction Co. of Elmhurst, llinois (1)
- West Fork Bridge Co. (1)
- West Virginia Bridge Works (1)
- West Virginia State Road Commission (2)
- West, Ambrose R. (1)
- West, Carl (1)
- Westcott Engineering Co. of Chicago, Illinois (1)
- Western Bridge & Construction Co. of Omaha, Nebraska (17)
- Western Bridge Co. of Harrisonville, Missouri (19)
- Western Bridge Co. of Chicago (1)
- Western Bridge Works of Fort Wayne, Indiana (6)
- Western Construction of Spokane, Washington (1)
- Western Construction Co. (1)
- Western Constructors Inc. (1)
- Western Engineering Constructors Inc. of Loomis, California (1)
- Western Pacific Erectors (1)
- Western Railroad Corporation (1)
- Western Wood Structures of Tualatin, Oregon (9)
- Westfir Lumber Co. (1)
- Westinghouse Electric Corporation of Pittsburgh, Pennsylvania (2)
- Westmoreland, Ed (1)
- Wetherell, Frank of Des Moines, Iowa (1)
- Weymouth Construction Co. (1)
- Weymouth, Moses (1)
- Wheaton Bridge & Iron Co. of Muskegon, Michigan (1)
- Wheeler Inc. LLC of Minneapolis, Minnesota (2)
- Wheeler, Edgar T. of San Francisco, California (1)
- Wheeling Structural Steel Co. (1)
- Wheelock Bridge Co. (2)
- Wheelock and King Co. of Des Moines, Iowa (1)
- Wheelock, Luther A. (1)
- Wheelock, McKay & Goshorn (1)
- Wheelwright Construction Co. (1)
- Wheelwright, Haven & Hoyt of Boston, Massachusetts (1)
- Whipple, Squire of Albany, New York (29)
- Whistler, George Washington of Fort Wayne, Indiana (6)
- Whitbeck & Power (1)
- White River Bridge Co. (1)
- White, E.A. (1)
- White, James (1)
- White, Nicholas (1)
- White, Samuel P. of Beaver Falls, Pennsylvania (1)
- White, U.B. (1)
- Whitehead, F.W. of Kahoka, Missouri (2)
- Whitham Construction Co. (2)
- Whiting & Turner Contracting Co. of Baltimore, Maryland (2)
- Whitney Brothers Co. (1)
- Whitney, Charles S. of Milwaukee, Wisconsin (5)
- Whitney, Wilke, & Stewart of Rushville, Indiana (1)
- Whitson & Kirby of Ardmore, Oklahoma (2)
- Whittaker & Diehl of Harrisburg, Pennsylvania (13)
- Whittemore, D.J. (1)
- Whittle, George D. (3)
- Wichita Construction Co. (2)
- Wickersham, John H. (1)
- Wickes Engineering & Construction Co. of Des Moines, Iowa (4)
- Wickham Bridge & Pipe Co. of Council Bluffs, Iowa (1)
- Wickline, G.G. (1)
- Wicks Engineering & Construction Co. (1)
- Wieser Concrete Products, Inc. of Maiden Rock, Wisconsin (1)
- Wiggel, C. R. (1)
- Wiggin, Ernest W. of New Haven, Connecticut (1)
- Wightman, George F. (1)
- Wikstrom, Inc., A. S of Skaneateles, New York (1)
- Wilbur J. Watson & Co. of Cleveland, Ohio (8)
- Wilcox & Sayward (1)
- Wilcus, S.R. (1)
- Wilder Construction Co. of Bellingham, Washington (1)
- Wildish Paving, Eugene (1)
- Wildish Standard Paving Co. of Eugene, Oregon (4)
- Wiley Manufacturing Co. of Port Deposit, Maryland (1)
- Wiley N. Jackson Co. of Roanoke, Virginia (1)
- Wiley-Maxon Construction Co. of Dayton, Ohio (1)
- Wiliam Rezner (1)
- Wilkerson, Ed (1)
- Willaeur & Co. (1)
- Willamette Iron Bridge Co. of Portland, Oregon (1)
- Willard Construction Co. (1)
- William A. Dean (1)
- William Albert Truesdell of New York, New York (1)
- William Alexander Campbell Jones (1)
- William Barclay Parsons (3)
- William Fairbarin & Co. of Manchester, England, United Kingdom (1)
- William Fish Williams (1)
- William G. Grove (1)
- William G. Woolfolk & Co. of Chicago, Illinois (1)
- William H. C. Greer (1)
- William H. Durand (1)
- William Hamilton Newell (1)
- William Harley Moore (1)
- William Harmon & Sons (1)
- William Hasell Wilson (1)
- William Hildebrand (1)
- William Horace Williams Co. of Fort Mcintosh, Texas (1)
- William Horrabin Construction Co. of Iowa City, Iowa (4)
- William J. Hill Construction Co. of Denver, Colorado (1)
- William J. Howard Co. of Chicago, Illinois (1)
- William J. Storen Co. of Detroit, Michigan (6)
- William J. Wilgus (1)
- William John McDannald (1)
- William Ledbetter Co. of Los Angeles, California (3)
- William Madison Thomas (1)
- William Marshall & Son (2)
- William O'neal and Sons Construction (1)
- William Oliver Bridge Co. of Spokane, Washington (2)
- William P. Carmichael Co. of Williamsport, Indiana (4)
- William P. Cowles (1)
- William P. Roscoe Co. of Billings, Montana (6)
- William Peyton Day of San Francisco, California (1)
- William Pickels Riddle (1)
- William S. Hewett & Co. of Minneapolis, Minnesota (15)
- William Sooysmith & Son of Chicago, Illinois (3)
- William T. Young Bridge Co. of Nashville, Tennessee (13)
- William Wagner & Bros (1)
- William Welles Bosworth of Marietta, Ohio (2)
- Williams & Douglas (1)
- Williams Bridge Co. of Richmond, Virginia (1)
- Williams Brothers (1)
- Williams Brothers Construction Co. Inc. of Houston, Texas (2)
- Williams, Charles A. of Jacobus, Pennsylvania (17)
- Williamson & Williams of Batesville, AR (1)
- Williamson & Williamson Bridge Construction (1)
- Williamson, H. (2)
- Willis Environmental Engineering, LLC of Marble Falls, Texas (1)
- Willis, Noel W. (2)
- Willits & Burr Co. of San Francisco, California (2)
- Wilson Construction Co. (1)
- Wilson, Charles (1)
- Wilson, D.W. (1)
- Wilson, H.E. (1)
- Wilson, J.W. of Warrensburg, Missouri (2)
- Wilson, John (1)
- Wilson, John T. (1)
- Wilson, Robert of Hagerstown, Maryland (1)
- Wilson, T.A. (1)
- Wilson, William A. (1)
- Winamac Bridge Co. (3)
- Windaor, Coleman & King (1)
- Windsor Locks & Warehouse Point Bridge & Ferry Co. (1)
- Wing, C.B. (1)
- Wing, H.W. (1)
- Winkley, L.W. (1)
- Winn, Charles of Muscatine, Iowa (1)
- Winston Brothers of Minneapolis, Minnesota (9)
- Winterburn and Lumsden (2)
- Winterset Inc. (2)
- Winvilliers, C. S. (1)
- Wirtz & Yates Inc. (1)
- Wisconsin Bridge & Iron Co. of Milwaukee, Wisconsin (140)
- Wisconsin Bridge & Iron Works of Milwaukee, Wisconsin (9)
- Wisconsin Bridge & Steel Co. (1)
- Wisconsin Bridge Co. of Milwaukee, Wisconsin (7)
- Wisconsin State Highway Commission (5)
- Wisda, M.X. (1)
- Wise & Watson Co. of Passaic (1)
- Wise, D.J. (1)
- Wise, Joseph (1)
- Wishon, Albert G. (1)
- Wisner, Otis (1)
- Witham Construction Co. (1)
- Withers, Charles D. (1)
- Witmer, O.D. (1)
- Wm R Schnabel (1)
- Wm Wagman and Bro of Dallastown, Pennsylvania (1)
- Wolf, Aaron (1)
- Wolf, Henry (8)
- Wolfe, D.C. (1)
- Wolff, Louis P. (1)
- Wood and Witten (1)
- Wood, E.M. (1)
- Wood, Ferdinand (2)
- Wood, H.S. (1)
- Wood, Rosencran (1)
- Woods Brothers Construction Co. of Lincoln, Nebraska (2)
- Woods, Dutton (2)
- Woods, Robert P. of Indianapolis, Indiana (11)
- Woodward Construction Co. of Woodward, Oklahoma (1)
- Woodward-Clyde of Delaware (1)
- Worchester, J.R. of Boston, Massachusetts (10)
- Word & Worrell of Fort Worth, Texas (1)
- Word, Dean (2)
- Worden-Allen Co. of Milwaukee, Wisconsin (23)
- Work, J.C. (1)
- Workin' Bridges/NSRGA of Grinnell, Iowa (2)
- Works Progress Administration (250)
- Worthen, M.E. (1)
- Wosky, John B. (2)
- Wright Construction (5)
- Wright Contracting Co. (2)
- Wright Lyons and Co. (1)
- Wright, Aaron (1)
- Wright, E.C. (1)
- Wright, James E. (1)
- Wright, R.B. (1)
- Wrought Iron Bridge Co. of Canton, Ohio (327)
- Wunderlich, Martin of Jefferson City, Missouri, and St. Paul, Minnesota (10)
- Wustholz, Fred (1)
- Wyeth, Nathan C. (1)
- Wyman & Simpson of Augusta, Miane (2)
- Wynkoop & McGormley of Lansing, Michigan (3)
- Wynn, George W. of Iowa City, Iowa (1)
- Wysor, W.W. (1)
- X -- Y -- Yancey Construction Co. of Abilene, Kansas (4)
- Yant Construction Co. (1)
- Yarbrough Construction Co. of Austin, Texas (1)
- Yaskin Engineering Inc of Miami, Florida (3)
- Yates, C. R. (1)
- Yates, William (1)
- Yawger & Betterfeld of Indianapolis, Indiana (2)
- Yeager & Sons (1)
- Yehle, Frank (4)
- Yellville Construction of Yellville, Arkansas (1)
- Yeon-Pelton lumber company (1)
- Yohn & Ritter (1)
- York Bridge Co. of York, Pennsylvania (23)
- York Engineering & Construction Co. (1)
- Yost Brothers (2)
- Yost Construction Co. (1)
- Young, Charles H. of Muscatine, Iowa (4)
- Young, Charles O. (1)
- Young, D.H. of Manchester, Iowa (5)
- Young, Hugh E. of Chicago, Illinois (3)
- Young, Robert A. (1)
- Youngstown Bridge Co. of Youngstown, Ohio (24)
- Z -- Zachrist Construction (1)
- Zane, Noah (1)
- Zartman Construction Co. of Northumberland, Pennsylvania (1)
- Zaugg, Marion (1)
- Zeigler, A. K. (1)
- Zelmer & Forrest Tidwell (4)
- Zenas King & Sons (1)
- Zendala Construction Co. of Manitowoc, Wisconsin (2)
- Zimmerly Bridge Co. (2)
- Zimmerman, F.A. of Redding, California (1)
- Zimmerman, O.B. (1)
- Zimmerman, Roy (1)
- Zmmerly Construction Co. of Paris, Illinois (1)
- Zoli, Theodore (4)
- Zook, Henry (1)
- Zurmuhlen, Frederick (1)