W. Va. Code § 22A-2-77

On or before the end of each quarter, the operator of each mine, regulated under the provisions of this chapter or article three or four, chapter twenty-two of this code, shall file with the director a report with respect thereto covering the next preceding quarter which shall reflect the number of accidents which have occurred at each such mine, the number of persons employed, the days worked and the actual raw tonnage mined. Quarters are based on a calendar year. Such report shall be made upon forms furnished by the director. Other provisions of this section to the contrary notwithstanding, no such report shall be required with respect to any mine on approved inactive status if no employees were present at such mine at any time during the next preceding calendar month.