Layer: Liquefaction Vulnerability (ID: 330)

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Description: <DIV STYLE="text-align:Left;"><DIV><DIV>Clipped to Rotorua TLALayer last updated: 04/10/2021Report Reference - A3787391LIQUEFACTION ASSESSMENT SUMMARYThis liquefaction assessment has been undertaken in general accordance with the guidance document ‘Assessment of Liquefaction-induced Ground Damage to Inform Planning Processes’ published by the Ministry for the Environment and the Ministry of Business, Innovation and Employment in 2017.https://www.building.govt.nz/building-code-compliance/b-stability/b1-structure/planning-engineeringliquefaction-land/Client Bay of Plenty Regional Council (BOPRC)Assessment undertaken byTonkin & Taylor Ltd, PO Box 317, Tauranga 3140Extent of the Study Area The Study Area aligns with the Bay of Plenty Regional Council boundaryexcluding the Tauranga City Council territory. The Study Area also includes two areas outside of the regional boundary, that being a small area to the west of Mamaku and a large area south of Lake Rotorua to incorporate all of the Rotorua Lakes Council Territory.Intended RMA planning and consenting purposesTo provide BOPRC with a region-wide liquefaction vulnerability assessment toidentify areas of land susceptible to liquefaction as required in the Regional Policy Statement (RPS). The technical report and resulting map outputs will be used to inform land use, subdivision and building consent applications. In particular the vulnerability assessment outputs will be utilised by stake holders to inform the risk assessment requirements for liquefaction prone land. Other intended purposes Not applicableLevel of detail Level A (basic desktop assessment)Notes regarding base informationThe available base information provides enough information for a Level A (basic desktop assessment) level of detail across the Study Area. The main factor controlling this level of detail is the spatial extent of the available geotechnical investigations and groundwater information across the Study Area. There are some small areas (e.g. parts of Whakatāne and Rotorua) where higher levels of detail could be supported by the available base information. Undertaking these studies at a higher level of detail is outside of the scope of work for this project. Other notes This assessment has been made at a broad scale across the entire region and is intended to approximately describe the typical range of liquefaction vulnerability across neighbourhood-sized areas. It is not intended to precisely describe liquefaction vulnerability at individual property scale. This information is general in nature, and more detailed site-specific liquefaction assessment may be required for some purposes (e.g. for design of building foundations).A key consideration of the liquefaction vulnerability categorisation undertaken in accordance with the MBIE/MfE Guidelines (2017) is the degree of uncertainty in the assessment. Discussion about the key uncertainties in this assessment is provided in sections 3.3 and 3.4 of this report.</DIV></DIV></DIV>

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