Four mining operations have received letters putting them on notice about a potential pattern of violations (PPOV) of mandatory health or safety standards under Section 104(e) of the Federal Mine Safety and Health Act of 1977, the Mine Safety and Health Administration (MSHA) announced in a written statement on Nov. 29.

The PPOV screening from which these letters resulted represents the third since MSHA established the current criteria and procedures in September 2010.

The four mines that received warning letters are Ten-Mile Coal Co. Inc.’s No. 4 Mine in Harrison County, W.Va.; Pike Floyd Mining Inc.’s No. 3 Mine in Pike County, Ky.; Argus Energy WV LLC’s Deep Mine No. 8 in Wayne County, W.Va.; and Noranda Alumina LLC’s Gramercy Facility in St. James County, La.