 The original designation of M @-@ 47 was routed from the <unk> – Ingham county line north to St. Charles and then east along M @-@ 46 into Saginaw . A southern extension into Ingham County to end at M @-@ 16 in <unk> was transferred and completed in 1924 . A northern extension to Bay City replaced a section of M @-@ 111 in 1929 , and extended farther to Bay City State Park in 1933 . M @-@ 47 replaced the remainder of M @-@ 111 and extended southward from the park to Bay City in 1938 , creating a " U @-@ turn " in the routing . The southern terminus was moved again in late 1951 or early 1952 to Webberville , although still ending on US 16 . 
