In 2001, the lease was altered to extend the mineable area of land from 16 to 160 hectares (40 to 395 acres); resources of 20 million tonnes of limestone have been defined within the proposed limit of mining.

It produces approximately 300,000 tons per year, about one quarter of the requirements for the state of New South Wales.

Apart from agricultural purposes, a major consumer of lime from Galong is the Port Kembla steel works.

[2][3][4] Squatter and former Irish convict 'Ned' Ryan took up land in the area around 1830 and built Galong House.

[9] It is now a retreat centre run by the Redemptorists and the Sisters of St Joseph, Goulburn.