Wolverine Worldwide said it has created 250 new jobs at its manufacturing facility in Michigan so far this year as it broke ground on a planned 16,000-square-foot extension. It should be completed in early 2017, allowing the company to add a new warehouse for incoming raw materials. Built in 1964 to make Wolverine and Hush Puppies shoes, the facility in Grand Rapids now measures 80,000 square feet. It manufactures Bates shoes for the military, whose sales are growing rapidly, and high-quality “made in the USA” shoes under the Wolverine, Hytest and Merrell brand names.