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Near completion ... 3 Waters manager Matt Bayliss discusses the progress of the Wigan St wastewater pipeline renewal with Wilson Contractors drain layer Steffan Ashbrook. The pipeline needed to replaced after the February flooding and more of the aging pipeline will be replaced using funding which the council received as a result of signing the GovernmentÂ’s 3 waters reform memorandum of understanding. PHOTO:SANDY EGGLESTON

How to spend nearly $3million of funding was tabled in a report at the Gore District Council meeting last week.

The report was presented by 3 Waters manager Matt Bayliss.

Mr Bayliss outlined a plan to allocate the $2,707,702 of funding the council is expected to receive as a result of signing the Government’s 3 waters reform memorandum of understanding last month.

In the report he recommended the money be divvied up four ways.

The largest portion, $1.925million, would be spent on the renewal of the Wigan St wastewater main.

“There have been multiple collapses in the road above the DN1000 wastewater trunk main along Wigan St in the past six months.

“While a $500,000 project to renew 170m of this main is currently under way, the full 1.6km of this pipeline is in extremely poor condition, requiring replacement as soon as possible.”

The sections of the main which had been replaced had been in worse condition than the closed-circuit inspection originally indicated, he said.

“It is now believed that there is substantial leakage occurring through the base of the pipe.”

In the past 12 months, wastewater mains in Wigan St and Irwell St failed to the point where emergency renewals were required.

Given the age of the council’s wastewater infrastructure, these significant failures were expected to become more common in the future, he said.

“Due to this, it is recommended that the council develops a renewal plan allowing replacement of wastewater mains to be prioritised, budgeted for, and completed in a cost-effective manner.”

To enable this to happen, $600,000 would be spent on a closed-circuit inspection of the wastewater network.

“[This] would allow between 30% and 40% of the 107km of wastewater gravity main in the council’s network to be inspected.”

Once this was completed it should give an overall picture of the condition of the rest of the network. A further $150,000 would be spent on extra staff and $57,702 on working with Otago and Southland local authorities.

Cr Doug Grant questioned whether it would be better to spend more on the CCTV inspection and cover the whole network.

Mr Bayliss said to cover the whole network it would cost about $1.8million and could take longer than the timeframe the money needed to be spent.

“I think the best approach is to do that 30% or 40% and then reassess ‘do we want to do more?”‘

To spend more money on the survey would mean less could be spent on the Wigan St wastewater renewal.

“You would need to find additional funding to replace that Wigan St wastewater drain – it is a matter of urgency.”

Cr Neville Phillips asked if the Waikaka and Mataura networks would also be inspected and Mr Bayliss replied they would.

“It will be proportionally across the three networks.”

Cr Richard McPhail asked how staff would select where to send down the cameras.

Mr Bayliss said an assessment had already been completed to identify those areas that it was most critical to be inspected.

“There will be a higher priority on them and then we will just select a representative sample.”

Councillors voted to approve the recommendations in Mr Bayliss’s report.