Section R. 325.1766 - Water of poor chemical quality or producing methaneRule 266.
(1) A dewatering well that produces water which is sufficiently contaminated or high in mineral content to constitute a significant hazard to lakes, streams or to groundwater aquifers by direct infiltration or inter-aquifer migration, shall be filled and sealed, with the method of abandonment being determined by a conference.(2) A dewatering well that is producing methane gas at the time the well is to be filled and sealed shall be plugged with neat cement grout with the precise procedure determined by a conference.Mich. Admin. Code R. 325.1766