(CNN) Customs and Border Protection has started knocking down the administration's border wall prototypes in the San Diego area, clearing the way for another construction project.

"At this point, we have learned a lot from them, but we don't necessarily have a purpose or use for them anymore, and we will be bringing them down," a CBP official said Wednesday.

In April 2017, CBP awarded contracts totaling more than $3 million for eight prototypes to six companies. The agency completed its testing and evaluation in October.

But all eight prototypes remained standing at the site until Wednesday, when workers used large construction equipment to knock over towering concrete. Images from the scene showed massive piles of debris where the proposed designs once stood.

A worker passes a partially demolished border wall prototype on Wednesday.

It's likely you won't see any of these structures popping up at the border again any time soon.

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