BY MICHAEL CHAIKEN REPUBLICAN-AMERICAN 27 You could say the Spring Hill Arts Gathering is another step in the evolution of Stephanie Ingrassia’s residency in the town of Washington, Conn. CONTRIBUTED This will be the fourth year Spring Hill Vineyard in New Preston has hosted a cultural arts festival. This is a scene from a previous year’s edition. The arts event, which returns for its fourth year this weekend and next, was the idea of Ingrassia, who co-founded Spring Hill Vineyard of New Preston in 2006 with her husband Tim. As Stephanie explained it, the couple had been spending 30 years as weekenders, shuttling between Connecticut and their primary home in Brooklyn, New York.