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Last updated: Thursday, 19 December 2019

 

Costs and funding

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The preferred option and connections (landings)

  • What is the preferred option?

    A preferred option has been identified and the rest of the business case process will examine this option in more detail.

    The preferred option is a five metre wide path, built on separate new pier brackets, attached to the existing concrete piers on the southbound side of the Auckland Harbour Bridge, directly linking Westhaven to Northcote Point and connecting with the future SeaPath route.

    The option meets the future demands of all bridge users and preserves the structural integrity of the Auckland Harbour Bridge.

    The five-metre width allows for separation between walkers and cyclists, making it safer and more enjoyable for all users.

    The route includes three pause points approximately one hundred metres long and 4,2 metres wide which will be terraced down from the shared path to allow cyclists and pedestrians who want to have a rest on their journey rest out of the main thoroughfare of those continuing their journey.

    During daylight, the Auckland Harbour Bridge shared path will create a strong sculptural symbol for people walking and cycling between the north shore and the city. After the sun sets, architectural lighting will shine a spotlight on this iconic bridge structure and create a feature within the Waitemata Harbour.

    The shared path will be separated from the Auckland Harbour Bridge’s existing southbound extension bridge (known as the southbound clip-on) by a sufficient gap to allow access for maintenance of the clip-on.

     

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  • What are the benefits of the option?

    Because it is attached to the existing bridge piers rather than the southbound clip-on there are no load restrictions, meaning there will not be restrictions on people using it and it is designed to cater for future demands.

    It generally matches the shape, form and alignments of the existing bridge.

    Separation between cyclists and pedestrians, improving safety.

    Wide pause points (areas to rest and observe the view).

    The ability for people to access and exit the shared path from the existing bridge in an emergency.

    There is more surety around the construction process and structural materials to be used on the new shared path - as it is similar to the existing Auckland Harbour Bridge box girders (clip-ons) in terms of structural form.

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  • Does the new design of the shared path provide a good level of safety for users?

    Yes, the path provides a good level of safety for users and during the detailed design phase of the work, we will continue to look at this aspect of the path in detail. Emergency services will be able to access the path from either end. In more serous circumstances, or if an evacuation was needed, because the path will be at the same level as the Harbour Bridge clip-ons, egress from the shared path is possible onto the Auckland Harbour Bridge lanes once they are closed safely.

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  • Will there be a restriction on the number of users on the path at any one time?

    No, generally not. The preferred design will likely include remotely operated gates to close the shared path in high winds or in the case of an emergency. However, it is likely that there will need to be careful event management of special events on the shared path and the Transport Agency will provide more information on this before the shared path is open.

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  • Has wind tunnel testing been undertaken for the preferred option?

    No. Wind tunnel testing will be undertaken early in the pre-implementation phase which commences after the Detailed Business Case phase is complete. The Transport Agency is aware that there was wind tunnel testing done for the SkyPath option as part of the consenting process, but this was not undertaken by or for the Transport Agency.

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Co-ordination with other projects

  • What is happening with the SeaPath project?

    The Transport Agency Board approved the Detailed Business Case (DBC) for SeaPath late 2018. The Transport Agency has awarded the contract for the design and consenting phase for the project which is due for completion in 2021.

    In this phase we will again be working with partners, stakeholders and the community to ensure the best outcomes for the project.

     

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Communications and engagement

  • How will the Transport Agency communicate with and engage and consult with partners, stakeholders and the community during the project?

    Our plans for engagement with partners, stakeholders and the community are underway. We will engage throughout the design and construction process to understand concerns and listen to ideas as part of the design and consenting process.

    We will use newsletters, drop-in information sessions, presentations, and opportunities for the community to give us feedback throughout the process. We will also share information and updates on our project webpage at www.nzta.govt.nz/ahbpath. People can register their interest in receiving information by signing up on the webpage to receive project updates.

    We also encourage people to email us at ahbpath@nzta.govt.nz with any queries or concerns.

    We are working with our partners, including Auckland Council and mana whenua, to optimise the project outcomes, particularly to ensure the path has good connectivity to local amenities, and recognises the area’s cultural heritage and values.

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Timeframes

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Procurement

  • Why are you requesting Registrations of Interest (ROI) from construction teams before confirming the design?

    The Transport Agency is seeking interest from designers and constructors so the design can be developed with constructor input. This will ensure the optimal solution can be delivered. Therefore, we will not finalise detailed design until this team is on board to support this process.

    Additionally, the process of bringing the right team and skills on board will take quite a bit of time. Although teams are requested to register their interest by the 11 November, it will not be until June 2020 that a preferred team will establish an alliance.

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  • What is the ROI asking for?

    Interest in delivering the project by companies who have the specialist skills in complex steel girder and concrete bridge design and construction is something that the team require.

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  • Have you used the alliance model with early contractor involvement like this on other projects?

    Yes, progressing with an alliance with early involvement of designers and constructors has proven successful on other Transport Agency projects including the Northern Corridor Improvements and Waterview Tunnels projects and is considered as best practice for developing large infrastructure projects across the world.

    By including the construction team in the design process, we will have the ability to tap into all considerations for constructability, which helps us progress efficiency going forward.

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  • How can I be involved in the detailed design of the project?

    Ongoing engagement with partners, stakeholders and community is required as this project continues to be defined and developed. There is still a significant amount of work to do to confirm the design and feed into the consenting requirements for this project.

    It is a priority for the Transport Agency to create the best outcomes for the community as well as those who will use the Auckland Harbour Bridge Shared Path.

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Geotechnical investigations

  • What is proposed?

    Geotechnical site investigations between the southern end of the Auckland Harbour Bridge (Westhaven / Te Okā) and the northern end (between Northcote Pont/ Te Onewa and Esmonde Road) are required.  

    Investigations at both the northern and southern sites are expected to begin in mid-December. No site investigations will be carried out between 21 December 2019 and 5 January 2020.

    The team will be back in the new year, beginning the week of the 6 January, to continue the work at Westhaven and Northcote Point, and then work north along the proposed alignment of the SeaPath project (predominantly in the road corridor) from Sulphur Beach Road to Esmonde Road. The work is expected to be completed by May 2020, (investigations may be completed earlier depending on technical requirements and conditions).

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  • What will the work involve and what can I expect?

    We will use a range of methods to carry out our investigations:

    Machine Boreholes:
    A machine borehole will require the use of a portable drill rig, about the size of a truck, which is used to recover core samples of approximately 100mm diameter at a specific location;

    Hand augers:
    A hand auger uses a man powered tool to perform shallow investigations (diameter less than 100mm) up to 5m depth to provide information on the soil properties;

    Test Pits:
    Test pits are undertaken by using a small digger to excavate a hole in the ground, to observe the material in the subsurface; test pits are in general less than 5m deep;

    Cone Penetration Tests (CPTs):
    CPTs involve the use of a portable rig, which is used to push an approximately 32mm diameter cone through the ground to determine the geotechnical properties. No soil samples are being collected. The rig comes in different sizes up to the size of a truck.

    Upon completion of testing, the holes will be backfilled, and the area returned to its original condition.

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  • Will this work be noisy?

    While site investigation activities do generate some noise, we will aim to minimise disruption where possible. Most investigations will occur during the week between 7:30am to 6:00pm, with some occasional works on Saturdays. Some very low-level noise works might be carried out between 7:00am and 7:30am and between 6:00pm and 7:00pm week-days.  Around the Onewa interchange there is the possibility of some night time drilling taking place due to traffic impacts on the motorway. This drilling will not be overly noisy and it is not likely that you will notice any extra noise above general night time motorway noise.

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  • Will I notice any vibration?

    It is not likely you will notice any vibration from this work. Any vibration is expected to minimal, for example similar to that of a passing truck.

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  • Will any of the investigations be occurring on my property?

    Most of the work required is on public or council-owned land, such as existing roadways, footpaths, berms and public parks.

    If we require access to your property, we will contact you in advance of this and discuss the work that we would like to carry out. We will liaise with you directly to obtain your permission to enter private property.

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Other

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