The Pioneer Valley Transit Authority has signed a 75-year lease to move into Springfield's Union Station. Union Station reopens in June as a multimodal transit hub following a $94 million soup-to-nuts rehabilitation decades in the making. Union Station will serve as the PVTA's Springfield hub and as its main ticketing and customer service facility. U.S. Rep. Richard E. Neal, D-Springfield, long a champion of the Union Station project, announced the pact Friday afternoon with retiring PVTA administrator Mary L. MacInnes. They were joined by Mayor Domenic Sarno.