The National Institute for Occupational Safety and Health (NIOSH) conducted a health hazard evaluation at the request of the United Mine Workers of America, Local 1702. The request concerned potential methylene diphenyl isocyanate (MDI) exposure during the application of polyurethane foam and silica and asbestos exposures during rock dusting at the Consolidation Coal Company Blacksville #2 Mine in Blacksville, West Virginia. NIOSH findings and recommendations are detailed.