The Trump administration announced it is awarding $4.5 billion in contracts to build hundreds of miles of new border wall. The money will be used for both physical barriers and what are described as technological barriers, like motion sensors that help detect individuals crossing into the United States illegally.
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The Department of Homeland Security built 450 miles of border wall during the first Trump administration. As of January 2025, it had finished 778 miles along the Southern border.

In total, the Department of Homeland Security (DHS) announced the latest round of funding will fund the construction of 230 miles of “Smart Wall” and 400 miles of technology.
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“For years, Washington talked about border security but failed to deliver. This President changed that,” U.S. Customs and Border Protection (CBP) Commissioner Rodney Scott said in a statement. “The Smart Wall means more miles of barriers, more technology, and more capability for our agents on the ground. This is how you take control of the border.”

Secretary of Homeland Security Kristi Noem is issuing two waivers to get the projects done quickly. Those waivers allow the Department of Homeland Security to make exceptions to environmental laws and other regulations that would otherwise prohibit construction in certain areas.
There will be 10 total projects in all four states along the southern border. They will build physical barriers and install technological detection systems in San Diego, southern Arizona, New Mexico and El Paso, Texas. They will construct water based barriers in south Texas in areas with high crossings through the Rio Grande River.

Despite the ongoing government shutdown, DHS is using money that was approved by Republicans in July when they passed the One Big Beautiful Bill Act. They also had money left over from fiscal year 2021 to use for the project. The department said it will continue to announce new contracts.
U.S. CBP published a map of walls and barriers along the southern border, which is available here.