For mines in the semi-arid climate regions of South Africa, the effects of pedogenesis and long-term vegetation status on soil covers that are designed to reduce seepage impacts are poorly defined. Material properties and vegetation characteristics provide inputs into numerical models that predict the extent to which soil covers can mitigate seepage impacts. When predicting post-closure seepage impacts, model inputs should include long-term material properties that exist after cover aging and prolonged vegetation growth. The focus of this study was to obtain these long-term material properties and vegetation characteristics.