Another commercial quarry, this one is located near High Point, NC.
Bluestone is one of the oldest commercial quarries in the area. On the bottom is a "PT" boat (I'm not sure how it got that designation). There are also helicopters, boat parts, a tunnel system, and other underwater toys. The deep spot is about 80 feet deep but usually very dark. Temperatures can be a challenge if not prepared.
This is another facility with good services. Along with a tram to carry your gear to and from the dive areas they have bunkhouses and hot showers. Fills and some services are available on site.
There is an entrance fee