 cottrellville township is a civil township of st. clair county in the u.s. state of michigan. the population was 3,814 at the 2000 census. ==communities== there are five unincorporated communities in the township: *avalon beach is on river road/m-29 ( elevation: 584&nbsp;ft.). & gnis in google map *broadbridge station is at river road/m-29 and broadbridge road (; elevation: 581&nbsp;ft./177 m.). & gnis in google map *cherry beac
1922_establishments_in_the_United_States CanadaaUnited_States_border_towns Townships_in_Michigan Townships_in_St._Clair_County,_Michigan