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Putting Research Into Practice: Guidance for Working With Potentially Acid-Generating Materials

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Status:  Complete
Report Date:  02/18/2020


Potentially acid-generating (PAG) minerals, such as some sulfur-bearing rocks prevalent in northern Minnesota, can be hazardous if exposed during highway construction. Exposure of PAG minerals to air and water can generate acidic drainage that affects surface and groundwater, plants, animals and aquatic life. MnDOT wanted a comprehensive manual that identified, mitigated and monitored PAG materials in northern Minnesota. Using PAG guides from local, national and international sources, investigators developed a guidance manual that provides step-by-step procedures to identify, quantify and mitigate PAG materials present in highway construction project sites. They also developed a monitoring plan the agency can follow to ensure that mitigation techniques continue to be effective year after year.

Final Deliverables:

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