Historic Character (Built Heritage) Delivery Work Plan
5.
Management and Mitigation Measures
Potential impacts on built heritage in proximity to construction activities are also considered as part of the CNV DWP and the GSMCP for the Karangahape Station main works. The performance standards for construction induced settlement specified in the Consent Conditions will be met through the specific design aspects of the main works, along with management, monitoring, mitigation and contingency measures set out in the GSMCP. The methods to be implemented during construction to avoid, manage and/or mitigate potential built heritage effects include: • • • • •
5.1
Building Condition Surveys prior to the commencement of works; Investigations of building foundations prior to the commencement of works; Management, monitoring (of vibration and ground/building movement), mitigation and contingency measures as set out in the CNV DWP and GSMCP; Built heritage protection where appropriate; and Building record and salvage strategy (with respect to the removal of any built heritage items) (refer to Section 6 of this HC DWP).
Building Condition Surveys 5.1.1. Pre-Construction Surveys
Prior to construction, condition surveys of heritage buildings identified in the CNV DWP, GMSCP and/or HC DWP as being potentially impacted by the works (inclusive of those buildings listed in Appendix 2 of the CRL designation conditions) will be undertaken. These condition surveys will ascertain any pre-existing damage to a building, existing structural distress, and any potential weakness of the structure’s foundations or structural elements, as well as non-structural damage. The Condition Surveys will form the basis for recording buildings and recording baseline information prior to works commencing. The building condition surveys will generally be undertaken as follows (in accordance with CRL designation Condition 46): • •
The building surveys will be undertaken by an independent senior qualified person. The survey shall include: o Any information about the type of foundations; o Existing levels of damage (aesthetic, superficial, affecting levels of serviceability); o Whether observed damage is associated with structural damage; o Susceptibility of building or structure to further movement; and o Photographic evidence.
With respect to built heritage, the building condition surveys will generally include: • •
•
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A survey of the exterior and interior of heritage buildings. A record of the condition of buildings using photographs, annotated drawings and written records, noting any existing signs of structural distress and damage or deterioration of a non-structural nature. Consideration of the stability of any elements, including applied decorative elements or features, and any fragile elements.
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