Zanesville Mayor Jeff Tilton says city crews are dealing with a major water main break. It happened Thursday morning on Pine Street and knocked out water service to a large group of customers and three area schools. Zane Grey Elementary, Zanesville Community High School and Zanesville Preschool are closed Thursday. Mayor Tilton says the problem involves a 12 inch water main and it will take a while to repair. The City hopes to have the problem fixed by noon.