A lease agreement between Hanson and the Department for Environment and Water (DEW) permits the on-going use of land for ancillary quarry activities such as water supply and stockpiles, adjacent to their private mine area and the Horsnell Gully Conservation Park. This area of land predates the Horsnell Gully Conservation Park. There is no active mining of quarry material within the DEW lease area.

The DEW lease contains a condition that the lessee shall, at its expense, rehabilitate the land to the satisfaction of the Minister at the conclusion of operations within the DEW lease boundaries.

The site continues to be operated under the current DEW lease arrangement.