Notified Consent Application – Silverstream Pipeline Bridge

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Consultation has concluded

Proposed bridge at Silverstream


Submissions have now closed. Please contact nick.pearson@gw.govt.nz if you have any concerns or questions.

Overview

The Silverstream Pipeline Replacement project (the Project) proposes to replace an existing section of the ‘Te Mārua to Karori’ pipeline (known as the Kaitoke Main) at Silverstream which, under normal conditions, supplies 100% of Porirua City’s and 40% of Wellington City’s potable water supply.

In 2015, the section of the Kaitoke Main, that crosses Te Awa Kairangi/Hutt River via the Silverstream road bridge on Fergusson Drive was identified as significantly corroded. In addition, the pipe crosses the Wellington Fault, and damage as a result of


Submissions have now closed. Please contact nick.pearson@gw.govt.nz if you have any concerns or questions.

Overview

The Silverstream Pipeline Replacement project (the Project) proposes to replace an existing section of the ‘Te Mārua to Karori’ pipeline (known as the Kaitoke Main) at Silverstream which, under normal conditions, supplies 100% of Porirua City’s and 40% of Wellington City’s potable water supply.

In 2015, the section of the Kaitoke Main, that crosses Te Awa Kairangi/Hutt River via the Silverstream road bridge on Fergusson Drive was identified as significantly corroded. In addition, the pipe crosses the Wellington Fault, and damage as a result of an earthquake would likely interrupt the water supply to Porirua and Wellington City for a significant period of time.

The Project proposes to relocate the section of water pipe that is attached to the Silverstream road bridge and along State Highway 2 (SH 2) by constructing a purpose-built bridge over Te Awa Kairangi/Hutt River, and a new section of underground pipeline in Manor Park Golf Course to improve resilience in earthquake and flood events. The bridge will be dual-use; able to carry a new water pipe and additional smaller three waters infrastructure in future, and will also provide access for pedestrians and cyclists between Silverstream and Manor Park.

Wellington Water Limited are lodging an application for resource consent for the Silverstream Pipeline Replacement Project.

Project description

The Project consists of the design, construction, operation, and maintenance of a replacement section of Kaitoke Main at Silverstream. A number of factors have contributed to the need for the project, these are identified in section 2.3 of the AEE, and summarised below:

  • Condition of the existing pipeline;

  • Seismic resilience of the existing Silverstream road bridge;

  • Flood hazard risk;

  • Access and maintenance;

  • Consequences if works are not undertaken.

The applicants have applied to Wellington Regional Council (Greater Wellington), Hutt City Council and Upper Hutt City Council for a suite of Resource Consents relating to the design, construction, operation, and maintenance of a replacement section of Kaitoke Main at Silverstream.

The applicant is proposing to replace the section of the Kaitoke Main that runs between the existing Kingsley valve chamber in Fergusson Drive, Silverstream and the existing Kaitoke Main connection on the western side of SH 2. This proposed replacement of the Kaitoke Main will cross Te Awa Kairangi/Hutt River via a new pipe bridge, it will then run underground through Manor Park Golf Course and join the existing trunk main located in the rail corridor approximately 200m south of Keith George Memorial Park Stream.

The proposed bridge is to have a 100 m long network arch main span superstructure, a 66 m long western approach span (which crosses the Wellington Fault), and a 36 m long eastern approach span. The construction of the bridge includes the construction of earth embankments, the bridge piers, piles and abutments, and then placement of the new bridge superstructure atop the pier structures. The pipe bridge includes a shared pedestrian and cyclist path on the downstream side of the bridge deck and provision for additional utility pipelines to be added in the future.

Works within Te Awa Kairangi/Hutt River include the reshaping of the riverbed to enable the construction of the new bridge, as well as riparian vegetation removal and recontouring of gravel to provide a suitable platform for construction vehicles to launch and crane/lift the bridge structure into place once the bridge piers have been constructed.

Earthworks to facilitate the project include the excavation and filling, reuse of on-site material, removal of waste material, and importing of angular aggregate material to stabilise disturbed surfaces is proposed across the Project. Earthworks and vegetation clearance are associated with ground improvement works, trenching and laying of underground sections of pipeline, and the construction of the pipe bridge and access embankments.

To summarise the key components described in the application are as follows:

  • Construction of an approximately 100 m long main span pipe bridge, 66 m long western approach span and 36 m long eastern approach span across the river which includes pedestrian and cycling access;

  • Earthworks and ground improvement works;

  • Construction of underground and above ground sections of pipeline;

  • Associated works including lighting, pedestrian/cycle connections, and landscaping within the Project area.

A comprehensive suite of conditions has been volunteered by the applicant and forms part of the proposal (amended as part of the further information provided by the Applicant). The conditions have been considered in the assessment where the conditions mitigate, avoid or remedy adverse effects.

Resource consents

Land use consents are required for:

  • Earthworks
  • Vegetation alteration, removal, and planting
  • New river crossing structures
  • Erosion protection structures
  • Demolition and removal of structures in Te Awa Kairangi
  • Bed recontouring in Te Awa Kairangi
  • Vegetation alteration, removal, and planting in the bed of Te Awa Kairangi
  • Tracking across Te Awa Kairangi
  • Disturbing contaminated land.

Water permits are required for:

  • Take and diversion of groundwater
  • Diverting Te Awa Kairangi and a tributary to Te Awa Kairangi during construction
  • Placing structures in the bed of Te Awa Kairangi
  • Permanent floodwater diversion by structures.

Discharge permits are required for:

  • Discharges of sediment laden water during construction
  • Sediment discharges associated with works in watercourses, including within Te Awa Kairangi.

Full details of the application and consents required can be found in the application.

Application documents

Resource consent applications, including the Assessment of Environmental Effects report and all supporting information, can be viewed on this page. Alternatively, hard copies can be viewed at the following places during operating hours (on request):

  • Upper Hutt City Council 838-842 Fergusson Drive, Upper Hutt Central, Upper Hutt 5018
  • Hutt City Council, 30 Laings Road, Lower Hutt 5040
  • Greater Wellington, 100 Cuba Street, Te Aro, Wellington 6011.

Submissions

Any person may make a submission on this application. Submissions can be made online below.

To obtain a paper copy of the submission form to post or hand deliver to Greater Wellington, please contact us on 0800 496 734. If your submission form is not submitted through this Have Your Say website, a copy of your submission must also be served on the applicant as soon as reasonably practicable after serving your submission to Greater Wellington.


Applicant: Helen Anderson

Addresses for service: GHD Ltd, PO Box 1746, Wellington 6140, Helen.Anderson@ghd.com

Greater Wellington PO Box 11646, Manners St, Wellington 6142, Attn: Manager, Environmental Regulation, notifications@gw.govt.nz(External link)

Alternatively, submissions can be dropped off in person at Greater Wellington, HCC or UHCC offices during office hours.

Submissions must be received no later than 5:00pm on Thursday 02 December 2021.

As a submitter, you are legally required to provide a copy of your full submission, including your personal details to the applicants. If you fill in the online form below, this will happen automatically - it will be your responsibility if you provide a submission in writing.

For guidance on writing a submission, and the submission process, you can refer to the Ministry for the Environment's guidance document.(External link)

If you have any question about the application or submission process, please contact Environmental Technical Support, Greater Wellington on 0800 496 734 or email notifications@gw.govt.nz

  • CLOSED: This survey has concluded.

    Submissions have now closed. Please contact nick.pearson@gw.govt.nz if you have any concerns or questions. 

    Making an online submission

    The information requested in this online submission form is required under the Resource Management Act 1991, and your submission will be automatically provided to Greater Wellington.

    How we’ll use your information

    The information collected from you in your submission is held securely by Greater Wellington. We use this information to contact you and keep you informed of the process; to serve your submission on the applicant; and to inform and advise the applicant, other submitters, the decision-maker and the public about the resource consent application. Your submission, or a summary of it, will be made publicly available on Greater Wellington’s website. Any non-published information can also be requested by the public under the Local Government Official Information and Meetings Act 1987.

    Find out more in the Silverstream Pipeline Bridge Privacy Statement which is included in the Documents section to the right.

    If you have any concerns about this process, please contact notifications@gw.govt.nz before lodging your submission.

    Note to submitter

    The closing date for serving submissions on the consent authority is the 20th working day after the date on which public or limited notification is given. 

    If you are a trade competitor, your right to make a submission may be limited by the trade competition provisions in Part 11A of the Resource Management Act 1991.

    If you make a request under section 100A of the Resource Management Act 1991, you must do so in writing no later than 5 working days after the close of submissions and you may be liable to meet or contribute to the costs of the hearings commissioner or commissioners. 

    Please note that your submission (or part of your submission) may be struck out if the authority is satisfied that at least 1 of the following applies to the submission (or part of the submission):

    • it is frivolous or vexatious:

    • it discloses no reasonable or relevant case:

    • it would be an abuse of the hearing process to allow the submission (or the part) to be taken further:

    • it contains offensive language:

    • it is supported only by material that purports to be independent expert evidence, but has been prepared by a person who is not independent or who does not have sufficient specialized knowledge or skill to give expert advice on the matter.

    Consultation has concluded
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