Fault Hazard Corridor is a polygon dataset showing areas close to known active faults of the Waimea-Flaxmore Fault System, which extends from the Alpine Fault near St Arnaud, through the eastern part of Tasman District and into Nelson City and Tasman Bay.

It is derived from the Fault Rupture Risk Corridor created by GNS Science in 2012. Subsequent modifications made under direction of Dr Mike Johnston. Where the position of a fault is well known the corridor is 10m wide (two 5m setbacks). Where the position of a fault is poorly known, or there are several strands, the corridor is wider (up to 300m in places).

Latest modifications made 9 Jan 2014

It is proposed this data be used in the Nelson Plan and replace the existing NRMP Fault Hazard Overlay .

This Feature Class was used to generate mailing lists of affected ratepayers in August 2013 and September 2013. Further modifications in Dec 2013 & Jan 2014 by Steve Read based on recommendations from Mike Johnston. Mailing Lists were created by Steve Read based on this feature class. Letters sent to affected ratepayers in late January 2014 under instruction of Jo Martin, Manager Hazards Programme.

For documentation of GIS processes involved in creating mailing lists in August and September 2013 (plus Jan 2014 update) see http://tardis/A632022

A further mailing list was generated in February 2017 and a public web map for consultation was created. See http://tardis/A1725887

This layer was copied from GISVector/Hazards/FaultHazardCorridor on 23 Sep 2019. Further revisions were provided to Council by Dr. Mike Johnston in May 2019(http://tardis/A2191345), and updated in this DRAFT layer.These were at View Mount, Brooklands Road/Garin Heights and Lud Valley Road.

Further information from Beca, received Dec 2021:

This file has been supplied with the understanding that consideration will be given to the appropriateness of any further application of this data, based on the following description.

Overlays along the Flaxmore, Waimea, Eighty-Eight, Jenkins, Whangamoa, Bishopdale, Grampian and Hira Faults in the Nelson region that identify where these faults could potentially deform or rupture the ground surface to inform requirement for additional geotechnical assessment. Such assessment (by suitably qualified geo-professionals) is to define the fault's location, provide expert opinion on whether development of land close to the faults should occur and advise any additional constraints or measures to be considered. Geospatial datasets considered in the assessment included existing Nelson Council Consent data (where provided), field mapping of faults and geology outcrops, hill-shade model and contours, historic aerial imagery (from years : 2020, 1940's, 1970's and 1980's), New Zealand Geotechnical database (NZGD) and published geological maps.

See Beca report 3160262-472476811-30 dated 10 December 2021 for detailed descriptions of the datasets considered in the assessment and the assessment methodology.