When complete, the regional "Big Pipe" will extend from the eastern edge of Lake Simcoe in the north, to treatment plants near Lake Ontario in the south, running along Leslie Street. It will twin with the near-capacity Yonge Street trunk, increasing capacity sufficiently to serve the region's growth until 2030. Intended to cover major growth areas in the eastern part of the region, it will connect directly to emerging developments from Markham to Holland Landing. Moreover, new connections to rural communities will be created; King City is connected to the existing system, whereas Stouffville will connect to the new pipe.