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Council engages geotechnical specialist to investigate Chinchilla Trunk Drainage Scheme

14 January 2015

Western Downs Regional Council has engaged a specialist geotechnical engineer to inform its investigations into the ground conditions at the site of the Chinchilla Trunk Drainage Scheme after it was damaged over the Christmas / New Year period.

Spokesperson for Works and Engineering Services Councillor Andrew Smith said that Council’s initial investigations of the damaged drain indicate that a naturally occurring geotechnical issue, is the cause.

“Last week, Council engineers inspected the drain, which is still in construction, and initial assessments indicate that the damage has been caused by a build-up of pore groundwater pressure from unexpected excessive overland water flows.

“This a natural occurring fault, however Council is engaging a specialist geotechnical engineer to further investigate the impacts of groundwater pressure on the drainage site so as to find a sustainable solution for this stage of the construction, as well as inform the design and development of Stage Two.”

Cr Andrew Smith said that unexpected overland water flow could be associated with near-by developments.

“The discharge of water from developments around the drainage construction site was more than had been planned for and so, in conjunction with the specialist geotechnical engineer, Council will be investigating this issue,” he said.

“The outcome of these investigations will help Council develop solutions that will mitigate the overland flow of water coming into the drain and as such, help alleviate the possibility of any future damage to the drainage site.”

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