Eight panels representing prototypes of designs for President Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE's planned wall along the U.S.-Mexico border were demolished in California on Wednesday.

The Associated Press reported that four concrete and four steel panels located feet from an existing barrier between San Diego and Tijuana, Mexico, were demolished Wednesday as construction crews begin work on a secondary barrier in the area, which will consist of concrete-filled steel slats.

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U.S. officials told the AP that some elements of the prototypes were implemented into the new design, but did not elaborate further. The eight prototypes cost between $300,000 and $500,000 each to build, according to the news service.

“They were tested and evaluated,” Ross Wilkin, a Border Patrol spokesman, told the AP. “They’re not required anymore. It’s time for them to go.”

A Customs and Border Protection (CBP) spokesperson told told The San Diego Union-Tribune on Saturday that the Trump administration had planned to remove the prototypes once construction of a new barrier began.

“That’s always been the plan,” a CBP spokesman said. “They just don’t serve a purpose anymore.”

The replacement barrier's construction is expected to last through 2020. President Trump visited the prototypes early last year, calling them "fantastic" at the time and predicting that migrants would be unable to cross sections of the border where the barriers were implemented.