BLUE SEAM APPROVED (TR 58) APPROVED
CHECK THIS WEBSITE FOR approval to add the Blue Seam
to it's existing underground coal mining operations.
Technical Revision Application No.8 (TR -58) for the New Elk Mine
https://drmsweblink.state.co.us/drmsweblink/0/doc/943045/Page1.aspx?searchid=97df5427-d6d1-4952-8100-bd7ee64eb0d7