Earthquakes in New Zealand’s Canterbury region between September 2010 and June 2011 caused extensive damage to infrastructure and property; however, a number of sewers rehabilitated and installed by Interflow remained unscathed in the region.
In the Waimakariri District, approximately 1,000 houses in the town of Kaiapoi were damaged to the extent that they required replacement, the company said.
Sections of rail track in the district became unserviceable and Kaiapoi’s main road was closed.
Prior to the first of three major earthquakes, Interflow lined a series of deteriorated asbestos cement sewers in nearby Woodend.
Then, after a second earthquake, approximately 2 km of Expanda Pipe was installed in nearby Waikuku.
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While damage was caused to other underground services in Waimakariri District, CCTV inspection showed no damage any of the Expanda Pipe liners installed in the region. All remained in ‘as new’ condition after three major earthquakes.
Image caption: Earthquake damage in Churchill, New Zealand.