Remedial options for a waste rock dump (WRD) were considered as part of closure planning studies at an active mine in Western Australia._x000D_
To minimise the impact of any seepage from the landform it was determined that placement cover system utilising the moisture store-and-release' concept was appropriate._x000D_
The purpose of the cover system was to: Reduce net infiltration of meteoric water to attenuate peak concentrations for contaminants of concern in natural receptors to levels that can be assimilated without adverse impact to the surrounding ecosystem; Provide a growth medium for establishment of a sustainable vegetation canopy; and Improve current quality of surface water runoff from waste storage areas.The project comprised several phases of work: materials characterisation, numerical soil-plant-atmosphere (SPA) modelling and finally cover system construction and monitoring equipment installation.CITATION:Barritt, R, 2018. Conclusions from long-term cover system performance monitoring - a case study, in Proceedings Life-of-Mine 2018, pp 101-105 (The Australasian Institute of Mining and Metallurgy: Melbourne).