News Asbestos find delays dredging By Bridget Rutherford A PROJECT to dredge the Woolston Cut has been delayed until December because asbestos was found in the silt. City council land drainage manager Keith Davison said as part of the investigative and pricing study, the results of testing found asbestos in some samples. “A specialist company was then engaged to carry out more extensive and detailed testing, which confirmed low levels of asbestos in some locations and at different depths within the sediment, suggesting historic contamination,” he said. It was originally hoped the dredging would begin this month. Mr Davison said due to the contamination, it would now begin in December, and should be complete by March. It was also expected to be slightly more costly than the original $2.3 million budget, he said. “The removal and disposal of contaminated silt is more expensive, but as the majority is now believed to be uncontaminated the increase is much less significant than originally understood.”
DELAY: Contamination mitigation strategies had to be developed for the Woolston Cut dredging project because asbestos was found in some of the silt. PHOTO: GILBERT WEALLEANS The cut was built in the 1980s to prevent flooding in the lower Heathcote River area, and for other catchment-wide improvements, such as the upper Heathcote detention basins. Water from the Heathcote flows into the cut, which can then be opened during floods using the tidal barrage. The city council decided to
dredge the cut so it continued to provide effective flood remediation. It was currently about 50 per cent full of silt and liquefaction. Mr Davison said contamination mitigation strategies had been developed to ensure contaminated silt would be removed and disposed of safely and at the right facility.
“The majority of the silt to be removed is not contaminated and will be disposed of normally,” he said. He said while the source of asbestos was not clear, it was not thought to be recent. “The localised nature of the contaminated sites might suggest historic dumping of materials into the cut.”
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NEW ROAD NAMES New road names in two Halswell subdivisions have been approved by the Halswell-Hornby-Riccarton Community Board. The names for four roads in Awatea Park and Quarry View were discussed at the meeting last Tuesday. The names are Romanee Lane, Muirhill St, Pegson Lane and Foden Lane. GRANT FOR BAND TRIP Cashmere High School student Aiyana Mason-King has received a $250 grant from the SpreydonCashmere Community Board to go towards her trip for the New Zealand Secondary Schools’ Brass Band. Aiyana is heading to Napier for a five day course, which involves expert tutoring, a series of rehearsals, and two concert performances with the secondary schools’ band.
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INTERMEDIATE BURGLARY Police are investigating a burglary at Christchurch South Intermediate. A window was discovered smashed in a building at the Selwyn St school at about 5pm on Sunday and items were taken, police said. A police spokeswoman said they were working with the school and making inquiries into the matter.
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