The Guinness Open Gate Brewery in Halethorpe, Maryland, just outside Baltimore, will soon close, leaving the iconic Irish beer brand's Chicago brewery as its only U.S. location.

Nov. 1 will mark the brewery's final day open to the public, leaving 174 Aramark employees out of work, according to a notice filed with the Maryland Department of Labor Oct. 1.

The move comes amid a $1 billion restructuring plan at Diageo, Guinness' parent company.