SALISBURY — Gildan Yarns announced Tuesday it will open a second facility in Rowan County, boosting the company’s employment numbers to nearly 400 by December 2015.

Tuscarora Yarns Inc., which has operated yarn manufacturing mills in North Carolina since 1899, will invest $6.3 million during the next three years in China Grove.

The announcement by its Gildan Yarns LLC subsidiary came a day after the company was approved by government entities in Davie and Rowan counties for a total of nearly $7.4 million in local ...