News Curragh opens Mammoth underground mine 13/12/2024 FacebookTwitterEmail Coronado's new Mammoth underground coal mine expands the current north and south open cut operations onsite at Blackwater. (Supplied) Coronado Curragh has been given the regulatory green light to begin mining at its Mammoth underground mine from Thursday 19 […] Subscribe or Login to see the rest of the content. Username Password Remember Me Forgot Password