Determination of the potential environmental effects of historic, current, and future Pacrim mining projects relies on a variety of geometallurgical tools such as ore deposit type, mineralogical studies, whole rock analysis, wet digestion methodologies, leaching tests, acid-base accounting methodologies, and geochemical modelling. These tools provide the data to determine the potential risks for the project in regards to acid and metalliferous drainage (AMD).Forecasting the effect of AMD for any project is reliant on the development of a conceptual site model integrating the geometallurgical data and then the application of the source-pathway-receptor model to understand the AMD risk. Understanding the potential AMD risks for a project enables informed decisions as to management methodologies, costs, and opportunities to maximise the value of any orebody. CITATION: Weber, P, Malloch, K and Kerr, G, 2019. Geometallurgical tools to understand acid and metalliferous drainage risks for Pacrim mining projects, in Proceedings PACRIM 2019, pp 9899 (The Australasian Institute of Mining and Metallurgy: Melbourne).