Coalmining company Coalpac Pty Ltd lodged a development proposal with the NSW government in July 2011 to expand its open-cut and high-wall coalmines in central western NSW.
The sites are in a proposed extension to the Gardens of Stone National Park and surround the small town of Cullen Bullen. Coalpac’s “consolidation project” involves expanding its Invincible and Cullen Valley coalmines, and building a new quarry in the Ben Bullen State Forest near Lithgow.