Three waters stimulus funding projects

On 8 July 2020, the government announced a funding package of $761 million to provide immediate post-COVID-19 stimulus to local authorities to maintain and improve three waters infrastructure, support reform of local government water services delivery arrangements, and support the operation of the new national water services regulatory agency, Taumata Arowai.

From this package Southland District Council was allocated $13.53 million to complete projects in Southland District, after Council signed a memorandum of understanding with the Crown regarding three waters reform.

The projects are being delivered in a collaboration between Southland District Council, the New Zealand government through the Department of Internal Affairs, and project managers Crown Infrastructure Partners.

The initial projects approved for completion are:

Waianiwa stormwater upgrade

HWR Contracting are replacing and upgrading the stormwater main along Waianiwa Oporo Road. This line will start at the intersection with Argyle-Otahuti Road and extend 500m east along Waianiwa Oporo Road, discharging into the existing ditch. The existing stormwater infrastructure in Waianiwa is in a poor condition and causing flooding issues on private land. This project is scheduled to be completed by May.

Eastern Bush/Otahu Flat water rising mains

HWR Contracting is installing a replacement for both the Eastern Bush and Otahu Flat rising water mains. The mains are being replaced from the north side of Grey Road, 1500m across private land (following the existing alignment) and reconnecting at the existing Eastern Bush main at Otahu-Eastern Bush Road and Otahu Flat reservoir, respectively. The existing infrastructure has been experiencing regular breakages. This project is scheduled to be completed by May.

Riverton water main renewal - Rocks Highway

Starting in early May, HWR Contracting will install a replacement water main in Riverton along Rocks Highway, from Roy Street to Evelyn Street. The existing infrastructure is in a poor condition and has experienced a number of breakages. This project is expected to take 2-3 months to complete.

Stewart Island stormwater upgrade

It is not yet known accurately when this project will start, given there is still design to be finalised and establishing on Stewart Island presents some challenges. Downer will engage an external consultant for design and then replacing some aged and undersized stormwater assets along Ayr Street. This project is expected to take 1-2 months to complete once construction starts.

Tuatapere water main renewals

Starting in April, Downer will install replacement water mains in Tuatapere. These mains will be installed: the full length of Sneyd Street; the raw water rising main along Elder Drive to the treatment plant; the treated water rising main along Elder Drive from SH99 to the water treatment plant and King Street, from Orawia Road to McVicar Street. The existing infrastructure is in a poor condition and has experienced a number of breakages. The Elder Drive and King Street mains are regarded as critical pieces of infrastructure. This project is expected to take 3-4 months to complete.

Orepuki stormwater upgrade

It is not yet known accurately when this project will start, given there is still design to be finalised. Fulton Hogan will engage an external consultant for design and then installing new stormwater infrastructure to redirect the existing outfall from the end of Dover Street. This existing outfall is causing significant issues with coastal erosion and will be redirected to ensure no further damage continues. This project is expected to take 2-3 months to complete once construction starts.

Lumsden water main renewals

Starting in June, Fulton Hogan will install replacement water mains in Lumsden. These mains will be installed: the full length of Helena Street; full length of Folia Street and Laura Street, from Helena to Flora Road. The existing infrastructure is in a poor condition and has experienced a number of breakages. This project is expected to take 2-3 months to complete.

Riverton pumped sewer

Wilsons Contractors has installed a new pumped sewer main along Princess and Carrol Streets in Riverton. The line starts from Ngarimu Street and runs along to the end of the road berm at the entrance to the Riverton Golf Club on Carrol Street. This enables the dwellings, existing and future, to connect to the reticulated sewer network in Riverton.

Otautau water main renewals

Wilsons Contractors is installing replacement water mains in Otautau. These mains will be installed the full length of Mary Street, Russell Espanade and Harbison Street, linking the works that were completed last year along Liemen Street and Main Street. The existing infrastructure is in a poor condition and has experienced a number of breakages. This project is scheduled to be complete by May.

Te Anau stormwater upgrade

Starting in April, work will be undertaken on the corner of Mokonui Street and Town Centre to upgrade a section of the stormwater network and mitigate flooding issues. This project is expected to take two weeks to complete.

Ohai AC water main renewal

Starting in June, Wilson Contractors will be renewing the AC water mains along the full length of Hastings Street. This project is expected to take two months to complete.

Condition and capacity assessment

Council has committed some stimulus funding to a condition and capacity assessment of the district’s sewer and stormwater assets.

Southland District Council, Invercargill City Council and Gore District Council have jointly put out a request for proposal for this work, with a decision expected in April. Work on the district-wide assessment should start in May. The public should not notice any disruptions as a result of this work.

Further project allocations to be released:

Caswell Road sewer

The existing sewer in Caswell Road, Te Anau, was installed in 1972. Continued development within the contributing catchment for this sewer line has meant the line is not meeting the required capacity and is planned to be upgraded to a larger pipe size, along the existing alignment. This will likely affect Caswell Road from number 1 to 48, Snodgrass Road and a portion of the State Highway around the Caswell Road intersection. This project is expected to take 4-5 months to complete once construction starts.

Towack Street stormwater upgrade

Council has stormwater assets in private property at 25 Towack Street in Riverton. These assets capture a reasonably sized stormwater catchment from surrounding properties and roads. The existing infrastructure is undersized and of poor condition. Council has engaged WSP to undertake preliminary investigations, consultation and design with the intention that new infrastructure will be installed along the driveway of 25 Towack Street and join into existing infrastructure before the beach outfall. Connections will be made to surrounding properties. This project is expected to take 1-2 months to complete, but is yet to have a start date.

Wyndham stormwater upgrades

WSP has undertaken an initial system review of the Wyndham stormwater network. Council is now working through this and considering the next steps in terms of a master plan for the Wyndham stormwater network.

Further AC water main renewals

Additional water main renewals packages are planned for Tuatapere, Riverton and Te Anau. These will be of similar scope to the packages already allocated.