The Minnesota Department of Natural Resources has been conducting research related to the environmental effects of mining for over 40 years. This body of work has uniquely positioned the DNR with a foundation of knowledge that can be drawn upon for technical aspects of the environmental review and mine permitting responsibilities with which the department is charged. This course will provide a refresher of key geochemical concepts and test methods typically needed for mining projects. The course will then review the history of DNR research and provide case study examples of how the information is used.