The crusher was operated by the Glen Alden Coal Company , a subsidiary of the Blue Coal Corporation . The breaker was operated by the Glen Alden Coal Company , a subsidiary of the Blue Coal Corporation .
Penghancur itu dikendalikan oleh Syarikat Glen Alden Coal, anak syarikat Blue Coal Corporation. Pemutus ini dikendalikan oleh Syarikat Glen Alden Coal, anak syarikat Blue Coal Corporation.