Keystone Bridge Company
{{Short description|American bridge building company}}
{{Infobox company
| name =Keystone Bridge Company
| logo =
| type = Bridge Company
| foundation = {{Start date and age|1865}}
| location = Pittsburgh, Pennsylvania
| key_people = Andrew Carnegie
| industry = Civil Engineering
| products = bridge building
construction
| revenue =
| operating_income =
| net_income =
| num_employees =
| homepage =
}}
The Keystone Bridge Company, founded in 1865 by Andrew Carnegie, was an American bridge building company. It was one of the 28 companies absorbed into the American Bridge Company in 1900. The company advertised its services for building steel, wrought iron, wooden railway and road bridges.
It held a patent for wrought iron bridges and also supplied wrought iron columns for buildings. Thomas Carnegie worked for Keystone Bridge as treasurer for roughly 20 years, from the founding of the company until his death in 1886.
History and architectural features
File:Eads bridge pano.jpg Keystone is best remembered for the Eads Bridge in St. Louis, completed in 1874, which survives to this day. A number of its works are listed on the U.S. National Register of Historic Places.{{NRISref|version=2010a}}
Carnegie sold his company, Carnegie Steel Company to J.P. Morgan in 1901.
Works include (attribution):
- Fairground Street Bridge (built 1895), spans ICG RR yard on Fairground St. Vicksburg, MS (Keystone Bridge Co.), NRHP-listed{{NRHP url|id=64000410|title=Historic Bridges of Mississippi TR}}
- Hannibal Bridge or Kansas City Bridge, spanned the Missouri River at Kansas City, MO, (constructed 1867–9) for the Hannibal & St. Joseph Railroad. (Keystone Bridge Co.).O. Chanute and George Morison, The Kansas City Bridge with an account of the Regimen of the Missouri River and a Description of the Methods used for Founding at the River, D. Van Nostrand, NY, 1870, Michigan Historical Reprint Series, University of Michigan
- Nokesville Truss Bridge, NE of Nokesville on VA 646 Nokesville, VA (Keystone Bridge Co.), NRHP-listed
- Oak Ridge Railroad Overpass, SW of Shipman on VA 653 Shipman, VA (Keystone Bridge Co.), NRHP-listed
- Pine Creek Park Bridge, N of Old Dam Rd., over Pine Cr. Fairfield, CT (Keystone Bridge Co.), NRHP-listed
- Riverside Avenue Bridge, Riverside Ave. and RR tracks Greenwich, CT (Keystone Bridge Co.), NRHP-listed
- Valley Road Bridge, Stewartstown Railroad, Stewartstown RR tracks over Valley Rd., Hopewell Township Stewartstown, PA (Keystone Bridge Co.), NRHP-listed
- White Water Creek Bridge, Whitewater Rd. over White Water Cr. Bernard, IA (Keystone Bridge Co.), NRHP-listed
- Windsor Harbor Road Bridge, Windsor Harbor Rd. at Rock Creek Kimmswick, MO (Keystone Bridge Company), NRHP-listed
- Keystone Bridge, Over North Fork of the South Platte River for access to the Mountain hiking trail Bailey Co. (Keystone Bridge Company)
References
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Category:Construction and civil engineering companies of the United States
Category:Companies based in Pittsburgh
Category:1865 establishments in Pennsylvania
Category:Construction and civil engineering companies established in 1865