Rockport Indiana is a tiny place. Essentially a trucking company formerly or currently known as EcKmiller (Flatbed, covered wagons steel and aluminum, one school, one powerplant, a few homes and a diner one block west. 10 miles north of the Ohio River on a bridge you wont believe.
It would be a stretch to believe additional trucking companies have either located there or replaced previous companies.
I have not been there since the mid 90’s so I have no idea where they are at now, I don’t expect THAT much development there since then.