Section R. 325.1663 - Abandoned wells and dry holes; plugging methodRule 163.
(1) An abandoned well or dry hole shall be plugged as follows: (a) A well or dry hole that terminates in overburden shall be plugged by filling with any of the following materials: (b) A section of a well or dry hole that is in bedrock shall be plugged by filling with neat cement or concrete grout from the bottom of the well or dry hole to not less than 20 feet above the top of the bedrock or to the ground surface. The section of the well from 20 feet above the bedrock to the ground surface shall be plugged in accordance with the provisions of subdivision (a) of this subrule.(2) Gravel, sand, stone aggregate, or other materials that are acceptable to the department may be used for plugging that portion of a well that penetrates lost circulation zones, such as gravel or cavernous, creviced, or fractured bedrock.(3) The flow from an abandoned flowing well shall be stopped by plugging the well with neat cement or concrete grout.(4) Abandoned wells that discharge subterranean gases shall be plugged with neat cement or concrete grout.Mich. Admin. Code R. 325.1663