CHARLEROI, Pa. — There is another extension that will keep more than 300 employees on the job at the Anchor Hocking glass plant in Charleroi. The plant, which also goes by the Corelle and Pyrex plant has been a Washington County staple for 132 years. Employees got word back in September that the Ohio-based glass manufacturer would shut down. The closure date kept getting pushed back – until this week – when tiered layoffs started. Jim Watt, who is Vice President of the union that represents the workers confirmed Anchor Hocking recalling the employees who were laid off. Watt says the workers’ contract was due to expire at the end of this month, but that the union signed a 6-month extension that includes a 10% pay increase for everyone at the plant. He says the plant will now close sometime in May.