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Shamokin Creek Restoration Alliance Helping revitalize the Shamokin Creek Watershed for over 25 years Our mission is to partner with local government businesses and citizens in cleanup efforts provide educational opportunities for residents living within the watershed to learn about Abandoned Mine Land issues and restore Abandoned Mine Lands to a condition supportive of commercial and residential development and recreational uses. What is Acid Mine Drainage. Acid mine drainage is the result of the exposure of pyrite to oxygen and water. Pyrite is found in association with coal deposits and when weathered releases iron and acidity to the waters.