Document ID: chunk:federal_register_of_legislation:F2018L00053:body:0:p57
Version: federal_register_of_legislation:F2018L00053
Segment Type: other
Provision Reference: 
Character Range: 161660–164646

former Convict Superintendent's House (Biloela House) were completed in 2013. Works involved the removal of unsympathetic alterations and additions, and the repair of original fabric rather than replacement. Minimal alterations improved the accessibility of the building.
Following initial archaeological investigations of the convict precinct in mid 2009, the Harbour Trust uncovered previously hidden underground solitary confinement cells beneath the floors of the original convict cookhouse. Originally built in 1841, the cells were used for solitary confinement until 1869, when the Cockatoo Island prison closed. Conservation, restoration and interpretation works to the cells were completed in mid 2014. These cells are a rare surviving example of convict solitary confinement architecture. Their discovery and reconstruction provides a compelling revelation of the harshness of the convict system on Cockatoo Island.

The Dockyard Precincts
The dockyard contains the earliest, most extensive and most varied record of shipbuilding, both commercial and naval in Australia. This is supported by comprehensive evidence contained in the National Archives.
The majority of original dockyard buildings remain on the Southern Apron creating an important complex of robust buildings representing most phases of the Islands European occupation. This group of buildings are the most intact of the maritime aprons with most of them having been retained by Defence.
The Powerhouse (Building 58) brickwork is mostly in good condition along with the recently repaired windows and roofs. Much of its equipment remains in situ, and provides the most extensive collection of early electrical, hydraulic, power and pumping equipment in Australia. The basement area has been pumped dry. Extensive structural remediation of the chimney occurred in 2015.
The Fitzroy Dock is currently filled with water and the stonework has been subject to extensive weathering and wear. The caisson of the Fitzroy Dock has been stabilised through minor repairs and remains in the Dock. The Camber Wharf and pontoon has been rebuilt and reinstated, now providing a secondary entry / exit point for workers and visitors to the island.
The machinery and the cranes, particularly the external ones, many of which are located on the Southern Apron, present a major conservation challenge. A survey of all cranes, and an inventory of machinery and tools have been carried out and all have been found to be generally structurally stable, however many are missing components and lack of maintenance has resulted in fabric deterioration. Repairs to the cranes are underway, enabling some to be certified for regular use on Cockatoo Island.
The Eastern and Northern Aprons were subject to major building removal by Defence prior to the transfer of the site to the Harbour Trust. Decontamination of the ground has been completed and landscaping undertaken in the majority of these spaces. Former building footprints have been