The parent company of Wausau Paper Corp. has announced a mass layoff at its Middletown facility. Essity Operations Wausau LLC, which owns a paper mill at 700 Columbia Ave. in Middletown, is eliminating 60 positions at the facility. The layoffs are expected to be permanent, according to a notice filed with the state of Ohio. Workers are expected to be terminated from employment beginning Aug. 16, with all reductions to occur by Sept. 31. Calls to Essity Operations were not immediately returned Thursday...