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Pyritic coal wastes produced by a coal beneficiation plant in the state of Santa Catarina in Southern Brazil are acid generating. Here we report the second part of a study evaluating the use of a dry cover to minimize acid mine drainage generation and its release into the environment. This part encompasses the construction and initial monitoring of an experimental pilot-scale unit. Local clays and ash from a power station were used as cover materials. Monitoring started in October 2007 and will extend for at least 4 years. Initial results of the dry cover system constructed using compacted locally available clay and ash look promising. The pH of the drainage ranged from 6.0 to 7.0, within the legal limits for discharge into the environment.

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