In April 2011 , the government then extended key expired mining leases to allow mining to continue at the main Enterprise sand mine until the end of 2019 .
Sibelco was interested in an extension to 2027 .
In April 2011 , the government then extended key expired mining leases to allow mining to continue at the main Enterprise sand mine until the end of 2019 , while Sibelco was interested in an extension to 2027 .