GREENFIELD, MA (FRANKLIN COUNTY NOW) — From now through the end of September, Mill Street in Greenfield will experience intermittent closures as a Berkshire Gas contractor replaces gas mains along Mill Street between Deerfield Street and the Mill Street Bridge at Power Court. Work is expected to occur between 7 a.m. and 4 p.m.. Once completed, the city intends to pave the road this fall.