https://www.usnews.com/news/politics/articles/2022-02-07/how-much-of-president-donald-trumps-border-wall-was-builtThe wall consists mostly of 18- to 30-foot steel bollards anchored in concrete. The barriers also feature sensors, lights, cameras and parallel roads in some places.
The vast majority of the 458 miles were constructed in places where some kind of barrier already existed, but most of the preexisting structures were far less imposing than the new wall and included fencing and rudimentary technical barriers. The total figure also includes what the agency calls “secondary border wall” or sections of wall built behind preexisting barriers that ultimately remained in place.
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Some 226 miles, or nearly half of the total number of miles built, run along the border in Arizona, including more than 100 miles in both the Border Patrol sector near Yuma and in the sector near Tucson.
About 100 miles were constructed in New Mexico, largely in a stretch along the eastern part of the state’s border that bumps into Texas near El Paso. A total of 55 miles were built in the Lone Star State along the Rio Grande by El Paso and in lengths by Lardeo and in the Rio Grande Valley.
California saw the completion of construction of 77 miles of wall in areas along the border near San Diego and El Centro.