NORTH CHARLESTON, SOUTH CAROLINA—   Stora Enso, Canford, Island Papers , Arjowiggins, Domtar , UPM and now Westrock have all announced mill or machine shut downs this year. WestRock Company announced it will permanently cease operating its paper mill in North Charleston, South Carolina, in August.The North Charleston mill produces containerboard, uncoated kraft paper (KraftPak®), and unbleached saturating kraft paper (DuraSorb®), with a combined annual capacity of 550,000 tons. Containerboard and uncoated kraft currently produced at the mill will be manufactured at other WestRock facilities. The North Charleston mill employs approximately 500 people. Employees will receive severance and outplacement assistance.