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. 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 •
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.). •
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==