Ohio Revised Code Title XV. Conservation of Natural Resources § 1565.04

The operator of each mine who is an employer as defined in section 4123.01 of the Revised Code, or any mine with three or more workers, shall employ a certified mine foreperson. In gaseous underground mines, only a holder of a mine foreperson of gaseous mines certificate that contains a notation by the chief of the division of mineral resources management showing the holder to be at least twenty-three years of age and have at least five years' actual practical experience in gaseous mines shall be employed as the mine foreperson. In other underground mines, the mine foreperson shall be a holder of a mine foreperson of nongaseous mines certificate that contains a notation by the chief showing the holder to be at least twenty-one years of age and have at least three years' actual practical experience in mines. All such underground mines shall have at least one certified foreperson on duty at all times when workers are employed in the loading or mining of coal underground. Each active working area of a surface coal mine and each active surface installation of an underground coal mine shall be examined for hazardous conditions, at least once during each working shift or more often if necessary for safety, by a certified mine foreperson who is designated by the operator to conduct such examinations. Any hazardous conditions noted during the examinations shall be reported to the operator and shall be corrected by the operator. A certified mine foreperson may conduct the examination that is required during each shift at multiple mine sites, provided that the sites are within a ten-mile radius.

No operator of a mine shall refuse or neglect to comply with this section.