Overburden Management Project
Draft Environmental Impact Statement
McArthur River Mine has lodged a Draft Environmental Impact Assessment (EIS) with the Northern Territory Government for the long-term management of its waste rock.
Like many mining operations, only a portion of the material mined at MRM is suitable for processing into metal. The left over material is waste rock, or overburden, and includes topsoil, clay and other rock types. Different rock types can react differently when exposed to air and water.
In 2014, we changed the way we classify waste rock and there is now less clean rock to use as a cover for the overburden emplacement facilities. This means that most waste will now be stored in one location, at the North Overburden Emplacement Facility, or waste rock pile. The redesign of this facility and the associated environmental approvals process are known as the Overburden Management Project.