Look Trump has done plenty of big demolitions and construction in very high population density Manhattan for decades.
He knows something about that.
How many huge construction projects have you ever done?
I was a project engineer and manager in a chemical plant requiring very large machinery. I also obtained air quality and water quality permits in the San Francisco Bay Area.
As to the quality of the concrete in the prison, I grew up in San Francisco, and remember well an escape from Alcatraz in June 1962. Three inmates chiseled away at the concrete around the air vents under their sinks with metal spoons and other improvised tools to enlarge the holes and break through to an unguarded utility corridor.