 At its greatest extent in the 1950s , the highway extended north from Webberville through <unk> and St. Charles to a junction with M @-@ 46 between Hemlock and Shields . M @-@ 47 turned east along M @-@ 46 , running concurrently with that highway to Saginaw Township . There M @-@ 47 turned north independently to a junction with US 10 , and then ran concurrently with US 10 into Saginaw . Once in the city , M @-@ 47 turned north along Bay Street out of town toward Bay City . M @-@ 47 joined US 23 and followed it north of town . M @-@ 47 then ran separately to the state park before turning south and back into downtown Bay City , ending at the US 23 business loop . 
