Michigan Compiled Laws, Chapter 425. Mines § 425.113

Sec. 13. It shall be the duty of each of the inspectors of mines appointed or elected under this act to make and file with the clerk of the county for which he was appointed or elected, at least 10 days before the time fixed by law for the annual autumn meeting of the board of supervisors, an annual report with a duplicate copy to the commissioner of labor of his acts and proceedings under this act, specifying among other things the number of mine accidents occurring during the preceding year causing either death or injury to persons, giving the name of the mine where and the circumstances surrounding said accidents, and so classifying said accidents to show what occurred through the fault or negligence of employers and those occurring through the fault or negligence of employes, and giving the results of inquests if any have been held in case of accidents causing death.