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1855

International Boundary Marker #1
Society: ASCEMain Category: CivilEra: 1850-1859DateCreated: 1855El PasoState: TXCountry: USAWebsite: http://www.asce.org/project/international-boundary-marker/Creator: Emory, William

William Emory was an 1831 graduate of the U.S. Military Academy at West Point. When the Mexican War broke out, he was assigned as chief engineer officer to General Stephen Kearny, whose army traversed largely unknown territories in the West. The U.S. War Department would later print 10,000 copies of Emory's Notes of a Military Reconnaissance, which made a significant contribution to understanding the geography and topography of the Southwest.

Image Caption: The easternmost boundary marker along the Mexico–United States border, just west of the Rio Grande. The photograph is taken from the northeastern corner, in the United States. The northern side of the obelisk contains a plaque in English; the eastern side of the obelisks contains a plaque in English and Spanish; the southern side of the obelisk presumably contains a plaque in Spanish.Era_date_from: 1855
Whipple Truss Bridge
Society: ASCEMain Category: CivilSub Category: BridgesEra: 1850-1859DateCreated: 1855SchenectadyState: NYCountry: USAWebsite: http://www.asce.org/Project/Whipple-Truss-Bridge/Creator: Whipple, Squire

The Whipple Bowstring Truss Bridge was built from a design patented in 1841 by Squire Whipple. Whipple was the first person to understand the stresses in truss members and he developed the first theoretical formula to calculate stresses in the articulated truss. His bowstring truss was the first to use cast iron for compression and wrought iron for tension membranes.

YearAdded:
1981
Image Credit: Courtesy Wikicommons/RehrenbergImage Caption: A Whipple Bowstring Arch/Truss style bridge, built by S. DeGraff in Albany, NYEra_date_from: 1855
Blenheim Bridge
Society: ASCEMain Category: CivilSub Category: BridgesEra: 1850-1859DateCreated: 1855Schoharie Creek (No longer)GilboaState: NYZip: 12076Country: USAWebsite: http://www.asce.org/project/Blenheim-Bridge/Creator: Powers, Nichols Montgomery , Blenheim Bridge Company

Nicholas Montgomery Powers built the bridge. It was first constructed behind the village, then taken apart and reassembled over the stream. Some residents questioned the idea of re-constructing it, but Powers was so confident of the bridge's durability that he sat on the roof when the final trestles supporting it were removed. From his perch he reportedly said: "If the bridge goes down, I never want to see the sun rise again!"

YearAdded:
1983
Image Credit: Courtesy Flickr/Doug Kerr (CC BY-SA 2.0)Image Caption: The view entering the Blenheim Bridge, before it was destroyed.Era_date_from: 1855
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