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  2. Mexico–United States border wall - Wikipedia

    en.wikipedia.org/wiki/Mexico–United_States...

    [23] [24] Anchor Post Products was contracted to build the new fence in a project inherited from Richard Nixon, [25] who was the first president to propose building a border fence. The proposed construction received press coverage after the company's George Norris, described the fence as a "razor-sharp wall", leading to negative responses in ...

  3. Border barrier - Wikipedia

    en.wikipedia.org/wiki/Border_barrier

    A border barrier, border fence or border wall is a separation barrier that runs along or near an international border. Such barriers are typically constructed for border control purposes such as curbing illegal immigration, human trafficking, and smuggling. [1] [2] Some such barriers are constructed for defence or security reasons.

  4. Separation barrier - Wikipedia

    en.wikipedia.org/wiki/Separation_barrier

    The Berlin Wall divided Berlin from 1961 until 1989, and was demolished between 1990 and 1992.. A separation barrier or separation wall is a barrier, wall or fence, constructed to limit the movement of people across a certain line or border, or to separate peoples or cultures. [1]

  5. Crosswall construction - Wikipedia

    en.wikipedia.org/wiki/Crosswall_construction

    Crosswall construction is a building technique that uses prefabricated concrete modules with load-bearing walls that act to communicate the entire weight of the building to its foundation. [ 1 ] [ 2 ] [ 3 ]

  6. IHNC Lake Borgne Surge Barrier - Wikipedia

    en.wikipedia.org/wiki/IHNC_Lake_Borgne_Surge_Barrier

    The project was funded by the American Recovery and Reinvestment Act of 2009. In April 2008, the Corps awarded a construction contract to Shaw Environmental & Infrastructure for the Lake Borgne Surge Barrier, making this project the largest design-build civil works project in Corps history.

  7. Anti-tunnel barrier along the Gaza–Israel border - Wikipedia

    en.wikipedia.org/wiki/Anti-tunnel_barrier_along...

    The anti-tunnel barrier along the Gaza–Israel border (sometimes referred to as the smart wall on the Israel–Gaza border) [1] [2] [3] is an underground slurry wall constructed by Israel along the entire 40-kilometer (25 mi) length of the Gaza–Israel border to prevent infiltration into Israel by digging tunnels under the Gaza–Israel barrier.

  8. Ha-ha - Wikipedia

    en.wikipedia.org/wiki/Ha-ha

    Comparison of a ha-ha (top) and a regular wall (bottom). Both walls prevent access, but one does not block the view looking outward. A ha-ha (French: hâ-hâ [a a] ⓘ or saut de loup [so də lu] ⓘ), also known as a sunk fence, blind fence, ditch and fence, deer wall, or foss, is a recessed landscape design element that creates a vertical barrier (particularly on one side) while preserving ...

  9. Floodgate - Wikipedia

    en.wikipedia.org/wiki/Floodgate

    Floodgates, also called stop gates, are adjustable gates used to control water flow in flood barriers, reservoir, river, stream, or levee systems. They may be designed to set spillway crest heights in dams , to adjust flow rates in sluices and canals , or they may be designed to stop water flow entirely as part of a levee or storm surge system.

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