The emergency department at Matthews Memorial Hospital will be closed for 24 hours, beginning Thursday morning. North Shore Health Network announced Wednesday morning that the site, east of Sault Ste. Marie in Richards Landing, will shutter from 8 a.m. Thursday to 8 a.m. Friday.Unlike with some previous closures, NSHN did not indicate this time around if a nurse practitioner would be on duty during any portion of down time.“The North Shore Health Network continues to investigate all possi