A three vehicle crash on Highway 41 north of Menominee closed down the highway for six and a half hours Friday morning.  The Menominee County Sheriff’s department says deputies were dispatched to the scene on US41 south of Birch Creek Road at approximately 5:37am.  The crash involved a semi, a pickup truck and a passenger car. Two people had to be extricated from their vehicles.  All parties involved were transported to Aurora Medical Center Bay Area for injuries, and one person was later air-lifted to Green Bay.  The crash remains under investigation.   US 41 between Birch Creek Road and Number 7 Road was closed for six and a half hours while traffic was detoured around the crash site.