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Ashuelot Covered Bridge
Main Category: CivilSub Category: BridgesEra: 1860-1869DateCreated: 186520 Hampshire Ct, , NH AshuelotState: NHZip: 03441Country: USA

The Ashuelot Covered Bridge is located at the center of Ashuelot, NH. It is a Town lattice truss bridge, spanning the Ashuelot River in a roughly north-south orientation. It consists of two spans with a total length of 178 feet (54 m). The total width of the bridge is 29 feet (8.8 m), and has a central roadway and sidewalks (measuring 3'10" in width) on each side. The bridge rests on stone abutments and a central pier. The abutments have been reinforced with concrete since the bridge was built, and the central pier has been protected by a metal breakwater.

Image Credit: Edwin S. Grosvenor
Five Stone Arch Bridges
Society: ASCEMain Category: CivilSub Category: BridgesEra: 1830-1839DateCreated: 1830-1860HillsboroughState: NHZip: 03244Country: USAWebsite: http://www.asce.org/Project/Five-Stone-Arch-Bridges/

"Some of New Hampshire's most aesthetically pleasing yet least appreciated structures are stone arch bridges."

YearAdded:
2002
Image Credit: Courtesy Flickr/Glass_house (CC BY-SA 2.0) Image Caption: The Gleason Falls Bridges, built in 1830, stands as a testament to the durability of dry-laid stone arches.Era_date_from: 1830
USS Albacore
Society: ASMEMain Category: MechanicalSub Category: Water TransportationEra: 1950-1959DateCreated: 1953 Submarine Memorial AssociationPortsmouthState: NHCountry: USAWebsite: http://www.asme.org/about-asme/history/landmarks/topics-m-z/water-transportation/-209-uss-albacore-%281953%29, https://www.asme.org/getmedia/04c57e57-f78e-461b-84c1-858a60d0be89/209-USS-Albacore-1953.aspxCreator: David Taylor Model Basin, Portsmouth Naval Shipyard

The USS Albacore (AGSS-569) represented a radical change in submarine design. The hull was designed with underwater speed as the prime requirement, and it was built with newly developed high-strength steel (HY-80). In addition to these two major innovations, the Albacore served as a test vessel for many new designs in submarine technology so that they could be refined before implementing them into the fleet. Among them was the testing of various control designs and correlation of actual sea-trial performance with that predicted in tow-tank tests.  

YearAdded:
2000
Image Caption: USS AlbacoreEra_date_from: 1953
Mount Washington Cog Railway
Society: ASMEMain Category: MechanicalSub Category: Rail TransportationEra: 1860-1869DateCreated: 1869Mt. WashingtonCoos CountyState: NHZip: 03589Country: USAWebsite: http://www.asce.org/Project/Mount-Washington-Cog-Railway/Creator: Aiken, Walter, Marsh, Sylvester

People thought inventor Walter Aiken was crazy when he proposed a railway to the top of Mt. Washington.  Aiken built a model of the roadbed and track with a cog rail system, but entrepreneur Sylvester Marsh is credited for launching the Cog Railway and bringing Aiken's ideas to fruition.

In 1858 Marsh applied to the New Hampshire Legislature for a charter to build and operate the steam railway and was granted permission in 1859.  Legend has it that an amendment was added offering permission to extend the railway to the moon.

YearAdded:
1975
Image Credit: Courtesy Flickr/Dennis Jarvis (CC BY-SA 2.0)Image Caption: Mount Washington Cog RailwayEra_date_from: 1869
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