Grantham flood inquiry public hearings conclude

GRANTHAM floods inquiry Commissioner Walter Sofronoff has described the 2011 flooding as an evil snake descending upon the town.

He made the comment after watching a video of flood modelling created by a hydrologist commissioned by the former owner of the Grantham quarry, Denis Wagner.

Despite residents giving evidence to the inquiry that the quarry worsened the flood that killed 12 people, Dr David Newton found it slowed the flood.

Mr Wagner's barrister, Peter Davis, said Dr Newton's findings were almost identical to those of Dr John Macintosh, the civil engineer commissioned by the inquiry.

Dr Macintosh's hydrology report stated the quarry slowed flooding as the pit was filled with water, and it did not have an overwhelming impact on the disaster.

Dr Newton provided one report before the inquiry and another after eyewitnesses testified at the inquiry, to ensure his modelling was consistent with evidence.

Mr Davis said the only discrepancy was with resident Marty Warburton's evidence, but did not explain further.

Mr Warburton took refuge on the roof of his service station.

Thursday was the last day for public evidence, following four weeks of testimony from residents, experts and authorities.

The parties will give their oral submissions on September 14 and Mr Sofronoff will provide his report to Premier Annastacia Palaszczuk by September 30. - APN NEWSDESK

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