A once-in-a-lifetime eclipse will plunge northwest Ohio into darkness at 3:11 p.m., Monday, April 8. Before that big day, Springfield Township has a number of things planned to mark the occasion, the newest of which are a free concert and fireworks display at Community Homecoming Park, 7807 Angola Road, Holland.Phil Barone and the Cruisers will perform from 6 to 8 p.m., Sunday, April 7, followed…