Isaac Plains is an open cut coal mine, in Northern Queensland, Australia. The Isaac Plains Project operates under an Environmental Authority (EA). They needed a field test for heavy metals compliance. The water sources included potable water, mine affected water, natural creek flows, water releases, groundwater and the receiving environment. The site water management system is comprised of sediment dams (for containing mine affected water), release dams (for releasing good quality water to the environment), a raw water dam (for storing the allocated raw water supply) and a drainage system which allows for clean water runoff collected by the catchment to be diverted away from the active mining area.