Shelby Ch’ng’s Thunder Bay at-large council seat will remain vacant until the Oct. 26 electionTHUNDER BAY — Shelby Ch’ng’s at-large seat on Thunder Bay city council has been declared vacant following her resignation from council, effective July 31. According to the City of Thunder Bay’s website, the at-large position will remain vacant until the Oct. 26 municipal election. Her departure comes several months after she announced in early April that she would not seek a fourth term on city council. Three Terms on Thunder Bay City CouncilCh’ng was first elected to city council in 2014, when she defeated incumbent Mark Bentz in the Northwood ward. Ch’ng’s departure will not trigger an appointment or byelection, meaning Thunder Bay council will operate with one fewer at-large representative until voters choose the next council on Oct. 26..