Contracts Awarded for Lake Dunstan water supply & Clyde wastewater pipelines

16/05/2019 1:00 a.m.

16 May 2019

Two significant infrastructure projects that will bring long-term benefits to Clyde and Alexandra are set to start in the next few weeks.

The contracts to construct two major pipelines – one that will deliver a new water supply from Lake Dunstan to Clyde and Alexandra — and another that will transport Clyde's wastewater to the Alexandra Wastewater Treatment Plant — have been awarded this week by the Central Otago District Council.

"The construction of these pipelines represents the start of two massive 'generational' projects for Central Otago that will bring long-term environmental and well-being benefits for Clyde and Alexandra communities," said Central Otago District Council Three Waters Infrastructure Committee chair Malcolm Topliss.

"The Lake Dunstan Water Supply project and the Clyde Wastewater project represent much-needed and significant investment to meet environmental expectations to improve the quality of Clyde's urban water discharges, and for drinking water in Clyde and Alexandra to comply with New Zealand Drinking Water Standards," he said.

Fulton Hogan has been awarded the contracts to construct the two pipelines as approved by Central Otago District councillors at their meeting yesterday (15 May 2019).

"Getting on with these projects means Central Otago will maintain its reputation for clean lakes and rivers. This supports community health and wellbeing, and recreational opportunities," said Mr Topliss.

"In consultation on the 10-Year Plan 2018-2028, the community expressed its support for these major projects and recognised the importance of 'doing them once and doing them right'," Mr Topliss said.

Cost and disruption to the community is reduced by constructing both the wastewater and water supply pipelines at the same time. A huge amount of planning and assessment have gone into getting the projects to the construction start line.​

Construction of the underground pipelines is expected to start this month and be completed around the middle of next year. The pipelines will predominantly run along the Otago Central Rail Trail corridor and for short lengths along the edge of State Highway 8.

The estimated cost of Stage 1 of the Clyde Wastewater Project is $13.6 million, $1.9 million more than that presented in the 2018-2028 10-Year Plan. This is due to re-evaluated costs for the rising main and pump station, and reticulation. The overspend will not impact on rates as councillors approved the additional monies coming from the existing Wastewater cost centre.

Tenders for the design of the wastewater reticulation system in Clyde will be called for in the next few months. Construction work on the reticulation phase is anticipated to start in autumn 2020.

The cost of the pipeline and bore work component of the Lake Dunstan Water Supply project is $9 million. More work is needed to determine the final filtration system for treatment so overall project costs are not yet known.

Council has been investigating water supply upgrade options for Alexandra to address customer dissatisfaction with the taste, odour, and hardness of the current supply for a number of years.  After investigating a range of possible options, Council determined that Lake Dunstan would provide the best water source.

All residential and commercial properties in Clyde are currently on privately-owned septic tanks and disposal fields. While these are permitted now, commercial septic tank systems may require a resource consent in the future.

People interested in the projects can keep in touch with progress by visiting the Council website, where they will soon be able to subscribe to an e-update. Information will also be available in print. ​​​​

The Council will be providing information to Clyde residents and businesses before the Stage 1 reticulation phase gets underway around autumn 2020.


Page reviewed: 16 May 2019 9:58am