Through a wholly owned subsidiary of Buccleuch, Glenmuckloch Restoration Limited operates via a joint venture with Hargreaves Surface Mining Limited, the Glenmuckloch open cast site.  The 160 hectare open cast mine is situated to the north of Kirkconnel in Dumfries and Galloway, and was formerly operated by the now liquidated ATH Resources mining company.

Following the liquidation of ATH Resources Buccleuch worked very closely with Dumfries & Galloway Council, the Scottish Government and Hargreaves Surface Mining plc to develop a package that enables exploitation of the remaining coal reserves at Glenmuckloch while simultaneously allowing a revised restoration programme.  Importantly, this has resulted in approximately 100 jobs being safeguarded within the vicinity.

It is anticipated that coaling will commence in the Autumn of 2013, with the site being restored over a three year period.