Below the dam wall, the river flows through a narrow channel as it flows west towards Teepookana, in the last 10 kilometers of the river, where extensive silting from the mine tailings that have been carried down from Queenstown, has created such a resource that at least one mining company has in the past proposed the mining of the deposits at the edge of the river, as well as the delta formed out into Macquarie Harbour due to the amount of economically viable materials in the silt.