The other EnCana tower may be between 40 to 50 storeys and the two towers might be connected over 6th Ave., at the fourth or fifth storey level, according to real estate speculation.
EnCana spokeswoman Almas Kassam said no start-up date has been set, but that the target is to have the project completed within five years.
Richardson confirmed he is in negotiations with EnCana's agent about the sale of his properties that sit in the block bounded by 5th Ave to the south, 6th Ave on the north, 1st Street on the east and Centre Street to the west.