Document ID: chunk:federal_register_of_legislation:F2013L01343:front:0:p59
Version: federal_register_of_legislation:F2013L01343
Segment Type: other
Provision Reference: 
Character Range: 151837–154729

and melt water ingress, once all the known ingress points are blocked
    1.
           * the internal climatic changes that have resulted from over-cladding the roof

           * the types of objects located within inaccessible ice-filled verandahs and possible nearby caches

           * impacts of climate change on artefacts and the structural integrity of the huts
2.
           * building and foundation stability, including deterioration rates of cladding
3.

Since January 1999, monitoring equipment recording relative humidity and temperature has been installed inside the Main Hut. These records, together with weather records collected by the AAE and recent expeditions, assist in understanding the environment inside the Main Hut and the likely effect of removing ice and stopping ingress. To develop a better understanding of the effect over-cladding has had on the internal climatic environment, additional monitoring and further analysis is needed. This has been incorporated in the AAD's monitoring and maintenance plan and will help inform actions to conserve and protect the values of the site.

Further analysis is needed of the heritage significance of AAE associated depots and traverse lines, and the wireless stations at Macquarie Island and the Queen's Domain, Tasmania in order to understand their relationship to the Mawson's Huts Historic Site. Such analysis will help better understand the association of these places with the listed National and Commonwealth Heritage values.

In addition, recent changes in fast ice conditions at Cape Denison have affected access to the site and this may affect future expeditions and tourist visits. In 2011/12, a number of visits to the site were unsuccessful or cancelled due to ice conditions. It is unknown how long the current sea-ice conditions might prevail.

2.8 Condition and Integrity of Values – Summary

The condition assessments have largely been based on the premise that the site's heritage value resides in the historic fabric as a whole. In addressing the condition of the fabric, the assessments to date have applied different measures and have not uniformly stated conditions in the currently preferred range of 'good' to 'poor', and there have been few direct reports on the associative values of the place or the relative 'integrity' – 'high' to 'low' – of the fabric elements. Moreover, any expedition to this site can only ever assess those parts of the fabric that were revealed at the time, given the levels of snow and ice, the extent to which weather conditions allowed outside work, and the time available.

The terms used below are consistent with state of the environment guidelines for assessing the condition of heritage places (see Pearson and Marshall 2006). Three levels of judgement are used to indicate the 'condition' of the value, or in other words, the state of the fabric reflecting