My dads company is shutting down!!?

So my dad has worked at paper mill for 35 years now and his company is shutting down. The first 25 years he was a regular worker, the last 10 years he was upgraded to a foreman. So first 25 years he was in the union, last 10 years he wasnt. He is to old to find another decent job id imagen...... My main question is how much do you thin he'll get for retirement or what will happen in general? he made on average $20.00 an hour over his time working there.