The Route 50 Diner in Ballston Spa is closed, and it appears to be permanent. Orange signs on the doors Tuesday evening said, “This property has been seized for nonpayment of taxes, and is now in the possession of the state of New York.” The Daily Gazette reports two tax warrants in the total amount of more than $40,000 were issued to the diner at 2002 Doubleday Ave. this year — $20,794 on May 12 and $19,926 on Nov. 20.