I have seen it also .. my quess it may be the average in this area and no it is not uncommon for Union Workers to make that much .. I have a friend who is pulling in about 150,000 a year. I am thinking it all depends on your field and area of work ..
There's even clauses in the contract between UPS Management, and the union that limits how much a UPS driver can lift/carry etc...
I don't see how unions make any private company productive... other than pulling its weight around, and having Luigi smack company execs around a bit..
--erik