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Friday, 23 September 2011 22:13 |
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The Port Hills has not suffered the same type of area-wide damage (namely liquefaction and subsequent lateral spreading) as the Canterbury Plains area. Assessment of the area was carried out by the Port Hills Geotechnical Group (PHGG), comprising six geotechnical engineering companies and was led by the Christchurch City Council to collect and review data from geotechnical hazards arising from the earthquakes of 22 February and 13 June.
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Friday, 15 July 2011 19:20 |
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Canterbury Earthquake Recovery Authority have today released mapping details from GNS Science showing the four main fault lines - Greendale; Port Hills; Christchurch City; Sumner.
While the document does not come with much commentrary, it makes for an interesting read, with the view toward "more investigation is required" to understanding The Gap between the Greendale Fault and either the Port Hills Fault and/or Christchurch City Fault.
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Friday, 15 July 2011 19:15 |
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Decision making process and key milestones are being prepared in collaboration with CCC, EQC, Tonkin & Taylor, and the Port Hills Geotech Group.
Detailed technical assessments including hazard mapping and rock fall hazard, cliff collapse and debris inundation are ongoing and are expected to be completed late-August (these are not remediation works but ongoing assessments).
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Tuesday, 14 June 2011 21:06 |
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The Port Hills Geotech team has been actively assessing by ground, and air, hill properties and key infrastructure since June’s two large earthquakes.
Overall, the scale of damage in the Port Hills from Tuesday June 13th earthquakes, is similar to the damage from the February earthquake. However a number of areas have suffered more severe damage. GNS Science is currently reviewing data in terms of land movement, rockfall and cliff collapse.
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