Exploration means all activities directed toward ascertaining the existence, location, quantity, quality or commercial value of deposits of Products.
tailings means material rejected from a mill after most of the valuable minerals have been extracted.
Postproduction means an activity related to the finishing or duplication of a medium described in Subsection 59-12-104(54)(a).
Mining means the mining, extracting, producing, handling, milling or other processing of Products.
Dewatering means the removal of water for construction activity. It can be a discharge of appropriated surface or groundwater to dry and/or solidify a construction site. It may require Minnesota Department of Natural Resources permits to be appropriated and if contaminated may require other MPCA permits to be discharged.