Update November 24: The company's been unveiled. Go read more.
Original post: A local manufacturer being referred to as "Project Bluewater" is set to invest $55 million in North Charleston and create 160 jobs with a payroll of $6.84 million.
The company worked closely with Charleston County to gain tax credits, and had requested confidentiality until the official announcement on Thursday, October 30 in December, it now seems.
A couple of write-ups out there, I recommend The Charleston Regional Business Journal's.
Update October 30: The Post and Courier has expanded their take, and has lots of details about the business incentives offered.
Also check out this story on how business investment is still showing strong signs of health in the Charleston area.