of the metal in roofs and cranes such as the hammerhead crane were rusting. White ants had attacked some of the timber structures. The archaeological potential of Goat Island is high. The integrity and intactness is high. The structures retain enough of their original fabric to enable their form, function and interrelationships to be easily read and understood. Modifications and dates Considerable modifications have been made to many of the structures. Many of structures are not in original condition and have been altered or have had major additions added in accordance with the needs of the various occupying authorities. Goat Island in popular culture During the mid-1990s to the early 2000s, the island was used as a film-set for the Australian television series Water Rats. The island has also played host to rock concerts from Midnight Oil in 1985 and Green Day in 2000. Both were presented by radio station Triple J. Goat Island recently reopened to the public, with tours available on weekdays. Goat Island was also included in the 2010 Crave Sydney International Food Festival's Sydney Harbour Island Hopping Tour. Panic at Rock Island, an Australian telemovie, was filmed on the island in 2010. On 24 March 2011, Foo Fighters performed a secret show on the island to 300 people. On 19 November 2013 Kings of Leon performed on the island in front of 600 people presented by Foxtel's Channel V. Heritage listing As at 24 March 2000, the Colonial Magazine is historically significant as probably the oldest surviving magazine built to store merchant's powder in Australia, evidence of the growing need for storage of privately owned gunpowder in the expanding colony of New South Wales. It has historical associations with its designers, Colonial Architects Edmund Blacket and Alexander Dawson, and despite the loss of original structural arrangement retains some ability to demonstrate its former use as a magazine facility for the storage of gunpowder. The building also has some historical significance as part of the shipbuilding establishment on Goat Island since 1925. The building is aesthetically significant mainly for the technical innovation of its design which departed from the military standard typified by the adjacent Queen's Magazine. The Colonial Magazine is also technically significant for the surviving evidence of its construction and use, and for the archaeological evidence likely to be present beneath and around the building. Goat Island was listed on the New South Wales State