By David Spunt

PHILADELPHIA (CBS) — Donald Trump’s campaign included talk of a wall that would be built on the border of the United States and Mexico. In his first interview as president-elect, on 60 Minutes, he changed his tune slightly about that wall.

Would Trump consider a fence, like they are discussing in some republican circles in Congress? “For certain areas I would,” Trump said. “For certain areas, a wall is more appropriate. I’m very good at this. It’s called construction.”

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“It will be an interesting project,” said Robert Gillies of AP Construction Inc. Construction is a topic that Gillies knows well. He’s an executive at the company based in Blackwood, N.J. He’s overseen the construction of many large walls; some on highways, others surrounding prisons.

He said that Trump’s wall proposal isn’t impossible at all.

(credit: CBS 3)

Robert Gillies of AP Construction Inc. (credit: CBS 3)

“Engineering, logistics and resources…that’s all it is,” Gillies said. Making Mexico pay for the wall might be a broken promise, Gillies said we should expect to see at least the start of construction during Trump’s presidency.

“We build 6,000 miles of roads a year, or more,” Gillies said. “So, building 2,000 miles of wall doesn’t seem to be out of the realm of possibility.”

It is important to note, there is already some wall on the United States border with Mexico. Trump said that he wants to make his wall at least 35-feet tall. There have been estimates up to 60-feet.