usually design documents are stamped by a "professional engineer" (PE) licensed by the state. They're names on the documents and they're supposed to check them

usually design documents are stamped by a "professional engineer" (PE) licensed by the state. They're names on the documents and they're supposed to check them. I used to be a civil engineer and for the earthworks the PE always had us checking things. especially grades in the areas around the perimeter. Our initials were on it but the PE stamped it. We did catch a few things where the plans called for a "wall" because if we did our 3/1 grading we'd meet existing over the property line. Not sure how the engineering works for airports.