The Stanrock mine site Tailings Management Area has a vegetated cover and there is no surface water contained within the TMA (ie. dry cover).
Surface water runoff and seepage are collected in a holding pond and treated to remove radium-226 at an effluent treatment plant prior to discharge to the watershed. Effluent quality at all ETPs met provincial and federal limits included in the site licenses and guidelines prior to release.
The picture below show the final stages of construction of the Stanrock Dam A as well as the development of the vegetative cover in 1998.