"At this point, we have learned a lot from them, but we have neither purpose nor use, and we will make them fall," said the official.
The official said that even though Congress banned CBP from using prototypes in most of its new wall projects, he had used the tests and evaluation to validate the previous ones.
"What this did not prevent us, in the first place, was to learn from these prototypes," said the CBP official.
Previous CBP construction methods, such as internal hardening (inside steel studs) and anti-climb functions, have been validated by testing, said the manager.
"These are not things that the [congressional] the language necessarily excludes and these are elements that we could add to our toolkit, "added the manager.
Some reports suggested that the prototypes had not produced the expected results in tests conducted by infringement experts, although the results were not made public.
The prototypes have the same footprint as the San Diego Secondary Replacement Barrier Project, which began last week. CBP had the option of leaving the prototypes in place and building them, but the agency decided that the steel-bollard wall was "the most efficient design at this location".
The prototypes will be "phased out" and the material will be recycled by "grinding" and used in a secondary construction project in San Diego.
None of the companies that built the prototypes are currently building portions of the wall at the southern border, according to the official.