Browse by Builder
(Companies, Contractors, Engineers, etc.)
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- A -- A & M Concrete Products Co. of Clear Lake, Iowa (1)
- A & P Roberts Co. of Pencoyd, Pennsylvania (40)
- A Bentley & Sons (1)
- A Teichert & Sons Inc of Sacramento, California (1)
- A&L Construction Co. of Hattiesburg, Mississippi (1)
- A. Guthrie & Co. of St. Paul, Minnesota (9)
- A. I. Savin Construction Co. of Hartford, Connecticut (1)
- 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 (17)
- 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. Cook Construction Co. of Ottawa, Kansas (1)
- A.L. Greenberg Iron Co. (1)
- A.M. Kennedy & Son (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 (11)
- 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 (7)
- 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 (2)
- Alexander & Charles Provost (1)
- Alexander & Higby of Des Moines, Iowa (1)
- Alexander & Repass of Des Moines, Iowa (2)
- Alexander Brociner (1)
- Alexander von Babo (4)
- Alexander, W. H. (1)
- Alfred Caldwell (1)
- Alfred Clas of Milwaukee, Wisconsin (1)
- Alfred Cook & James Allen (2)
- All-Pro Construction Co. (1)
- 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)
- Alonzo J. Hammond (1)
- Alpine Construction (8)
- Alsbury & Co., A.A. (1)
- Altman-Rogers Co. of Oklahoma City, Oklahoma (2)
- Alton-St. Louis Bridge Co (1)
- Altoona Shops, PRR (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 (1,419)
- 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 Railway Engineering (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 (2)
- 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 (2)
- Architect - Richard Sundeleaf (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 (35)
- 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 Bridge Co. of Texas (1)
- 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&P Bridge Co., The (1)
- B&W Concrete Co. of Newark, New Jersey (1)
- B. D. Freedman (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)
- BROWN & MACKENTHUM (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 (3)
- 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 (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)
- Belin Construction Co. (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 (30)
- 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)
- Berenz & Son Construction (1)
- Bergen & Bergen of Franklin, Indiana (1)
- Berger Partnership PS of Seattle, Washington (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 (155)
- Berlin Iron Bridge Co. - East Berlin CT
- 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 (128)
- Bette & Cring of Latham, New York (1)
- Bibb, C.F. (1)
- Bicknell, Warren of Cleveland, Ohio (2)
- Big R Manufacturing (2)
- Big Wabash Bridge Co. of Carmi, Illinois (1)
- Biggs & Pauley of Winfield, Kansas (1)
- Bigley, Richard A. (1)
- Bill Barnard of Ames, Iowa (1)
- Billings Bridge Co. (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 (25)
- 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
- Bollman, James (2)
- Bollman, Wendel of Baltimore, Maryland (19)
- 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 (2)
- Braun-Fleming-Knollman & Prior of Columbus, Ohio (2)
- 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)
- Brockman and Walker (1)
- Brogan Construction Co. of Des Moines, Iowa (2)
- 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)
- Brooks-Borg of Des Moines, Iowa (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)
- Brown-Abbott Co. (1)
- 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 (15)
- 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 (18)
- 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)
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- 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)
- North Iowa Contractors, Inc. of Manchester, Iowa (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)
- Not known yet. The Wisconsin Central records don't exist for that era? (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 (14)
- 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.? (2)
- 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)
- Olney J. Dean & Co. of Chicago, Illinois (1)
- 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 (25)
- 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. (5)
- 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 (25)
- 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 (39)
- 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 (5)
- 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. of Tulsa, Oklahoma (3)
- Patterson, Earl (1)
- Patterson, J.A. (1)
- Patterson, Robert (1)
- Patterson-Burghardt Construction Co. of Denver, Colorado (2)
- Patterson-Burkhardt Construction Co. of Denver (1)
- 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./Works of Omaha, Nebraska (7)
- 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 (14)
- Pencoyd Iron Works of Pencoyd, Pennsylvania (31)
- Pendleton, Craig R. (1)
- Penn Bridge & Machine Works of Beaver Falls, Pennsylvania (1)
- Penn Bridge Co. of Beaver Falls, Pennsylvania (69)
- 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 (149)
- 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 (18)
- 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 (2)
- 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 (176)
- 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? (4)
- 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)
- Plank Road Co. (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)
- Port of New Orleans (1)
- Porter Brothers Co. of Spokane, Washington (4)
- Porter McCully Constr. Co. (1)
- Porter-Dewitt Construction Co. (1)
- Portier, Guido A. (1)
- Portland Bridge & Building Co. (1)
- Portland Bridge Co. of Portland, Oregon (5)
- Portland Dredging Co. of Portland, Oregon (1)
- Possibly D.H Morrison / Columbia Bridge Works. (1)
- Possibly Morrison (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)
- Pottstown Shops, Reading Railroad (2)
- 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.
- 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 (35)
- Public Works Construction Co. (5)
- Pueblo Bridge & Construction Co. (2)
- Pueblo Bridge Co. of Pueblo, Colorado (22)
- 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 Grace Contracting Co. of Pittsburgh, Pennsylvania (1)
- 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 (57)
- 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)
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