Weir ‘best design’ to control floods in Tuckombil Canal
FLOOD authority Richmond River County Council has restated its position that the current Tuckombil Canal weir, which controls floodwater flow between the Evans and Richmond rivers, is the best structure for the job.
In July Richmond Valley Council asked RRCC to clarify the best possible weir structure regardless of cost.
This followed complaints from landholders on the western side of the weir, swamped by the unusually long-lasting February flood in the mid-Richmond.
Those landholders argued the fixed weir did not allow floodwater to pass through quickly enough, which extended the duration of flooding.
But a letter in response to RVC, the county council's general manager, Kyme Lavelle, has categorically supported the current structure.
"... the fixed weir is the option that fulfils all requirements for the sustainable long-term management of the Tuckombil Canal under a triple bottom-line approach," Mr Lavelle wrote.
Mr Lavelle said he had reviewed the independent assessment by consultants GeoLINK into preferred weir options in 2007.
"... the County Council worked for over seven years to identify the best long-term management option for the canal and the option finally adopted is what is in place now."
The question of the best structure for the weir has caused much debate.
The present $70,000 concrete weir was reviewed between 2006 and 2008 in comparison with an open-and-closing structure, then preferred by the council and some stakeholder groups, but estimated to cost up to $3.3 million.