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Road conditions(2) Swimming pools notice(1)

Dunedin City Council – Kaunihera-a-rohe o Otepoti

May 2017

This phase of the project is complete and the Bishopscourt planting was done at the end of last year.

October 2016

We would like to thank residents and the general public again for their patience and understanding during this project. We completed work on Phase 1 in May and have reinstated all roads. The road improvement work in front of the Bishopscourt car park at Wales Street will be done at the end of October. We plan to have planting work at the Bishopscourt car park done by the end of the year.

13 May 2016

The construction works are largely complete. Most of the affected roads have been reinstated and work on the remainder is underway. Unforeseen ground conditions and expanding the scope of work means construction has taken longer than expected. We would like to thank residents and the general public for their patience and understanding during the construction period of this project.

26 November 2015

Lynn St, Wales St, Fairfax St, McMillan St: New foul sewers are complete. Connections of new watermains to the live network will be done next week. Road reinstatement and hooking up of water laterals to be undertaken after these connections. It is expected to be out of this area within two weeks.

Shetland St: Construction of foul sewer and watermain is currently underway between Nairn St and Prospect Bank.

Dale St: To be started in two weeks.

Mardale St, Oban St, Mount St to follow after Shetland St is completed in early 2016.

June 2015

We have now completed investigation work on the condition of these earthenware pipes and found which of those need replacing. The work will be carried out in several phases. The first phase of the works has been awarded to City Care Ltd for a price of approximately $2.9M. Affected streets include Wales St, Fairfax St, McMillan St, Shetland St, Mount St, Dale St, Oban St and Mardale St.

Site preparations have been underway for the past month and the replacement of the ageing pipelines is starting the last week of June and should finish by the end of 2015. There will be some traffic disruptions and diversions as a result of the works. Affected residents will be contacted and traffic disruptions will be on our website.

December 2014

Residents may have noticed CCTV vans in Kaikorai Valley. These are part of a project investigating the condition of earthenware wastewater pipes in the area. These pipes make up about 40% of Dunedin’s wastewater network. Around Kaikorai Valley the pipes were largely constructed in the early 1900’s and are fast approaching their use-by dates.

As the pipes age, cracks allow groundwater to infiltrate the system which causes flooding after heavy rain. During storms the pipes already operating at full capacity as a result of groundwater infiltration are then overloaded by stormwater. In the north west corner of South Dunedin this type of flooding occurs when sewerage flows infiltrated with groundwater from Kaikorai meet flows from other parts of the city. Along a flat gradient this results in a bottleneck effect.

As they age, there is also increased risk these pipes will collapse and cause blockages.

To address these issues, the DCC is undertaking the CCTV work to investigate upstream pipes and find those needing replacement. Similar filming work has already been done in Andersons Bay resulting in $5 million of wastewater pipe renewals being completed in 2013/14 and 2014/15. The results of the Kaikorai Valley filming are so far showing pipes in poor condition. It is expected wastewater pipe renewals in the region of $5–7m will take place in the area over the next three years. Tenders for the work in Kaikorai Valley will be advertised in the New Year.

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