​Project Overview

Metro Vancouver is constructing the Annacis Water Supply Tunnel deep under the Fraser River, between the Cities of New Westminster and Surrey. This tunnel will be one of four new water supply tunnel crossings in the region built to withstand a major earthquake.

When complete, the new water supply tunnel will meet current seismic standards, and help ensure the continued reliable delivery of clean, safe drinking water to the region well into the future.

Construction of the Annacis Water Supply Tunnel will occur from 2022 to 2028. It will involve building an entry and exit shaft at either end of the route to excavate the tunnel, which will be approximately 2.3 kilometres in length.

Once construction is complete, Metro Vancouver will connect the newly constructed water supply tunnel to the regional water distribution system, and restore both shaft sites. The restoration phase will include replanting trees at the project area in Surrey, and creating a new green space for the community of New Westminster.

Learn more about the Annacis Water Supply Tunnel in our fact sheet.

City of New Westminster & City of Surrey

  • What Will Happen During Construction?

    Activities related to the construction of the Annacis Water Supply Tunnel will include:

    Site Preparation

    Our contractor will install temporary fencing around the site to ensure safety of crew, pedestrians, and cyclists throughout construction.

    Shaft Construction

    Once the site preparation is complete, the contractor will excavate a vertical shaft, which will be used as the entry for the tunnel boring machine (TBM).


    After the shaft is built, the tunnel will be excavated deep underground using the TBM. It will be launched from the entry shaft located in Surrey and will progress to the exit shaft in New Westminster.

    Water Main Installation

    Once the tunnel is excavated, a 2.6 m diameter steel water main will be installed inside the new tunnel.

    Valve Chamber Construction

    When the water main installation is well underway, crew members will build an underground valve chamber at each shaft site. It will be used to regulate water flow, and isolate sections of the distribution system to conduct maintenance and repair work in the future.

  • How Will This Project Impact Me at the South Shaft Site?

    South Shaft Site

    Metro Vancouver is committed to minimizing project impacts to the surrounding community wherever possible. As part of our process, we identified potential impacts such as noise, traffic and dust early in the design stage and planned measures to mitigate them during construction:

    Reduce Noise and Vibration

    There will be some noise and vibration associated with the construction activities at the south shaft site. Vibration will be minimal and noise generated by construction activities will be constantly monitored to ensure compliance with City of Surrey’s bylaws or granted bylaw variances. Crews will attempt to reduce noise and vibration impacts, whenever possible, by:

    • Scheduling work with our noisiest and high vibration equipment, such as hydro vacuum trucks and jack hammers, to take place between 8:00 am and 6:00 pm
    • Minimizing “nuisance noise”, such as offloading equipment, operating back-up beepers, or warming up heavy equipment
    • Covering noisy equipment while in use

    Keep People Moving Safely and Effectively

    To minimize traffic impacts in the area, our contractor will:

    • Access and leave the project site via Grace Road and River Road. Residential streets will be avoided wherever possible
    • Place traffic control personnel and signage around the construction area to ensure pedestrians, cyclists and drivers do not enter the project site
    • Maintain access to at least one sidewalk at all times
    • Remove equipment and obstructions to maximize public access to roadways and sidewalks when construction activities stop

    Manage Air Quality and Dust

    To minimize greenhouse gas emissions and dust, our contractor will:

    • Reduce vehicles idling time
    • Shut down equipment that is not in use
    • Sweep around the construction site to minimize dust
  • Hours of Work

    South Shaft Site

    The south shaft site is located in the City of Surrey, at Grace Road, east of the Highway 17. This will be the main construction site for the Annacis Water Supply Tunnel project.

    Typical Hours of Work

    All work will comply with City of Surrey bylaws or granted bylaw variances. Typical hours of work for this project will be:

    • Monday to Friday: 7:00 am – 5:00 pm
    • Weekends and holidays: No work planned

    There may be times when construction crew will need to work longer hours or on weekends to complete certain tasks, but Metro Vancouver will provide notification about these activities ahead of time.

  • What is the Plan for Restoration?

    South Shaft Site

    Once construction is complete, Metro Vancouver will work with City of Surrey to ensure the site is restored in line with sustainable practices to support the area’s biodiversity and ecological health.

    We will replant a mix of different types of trees and shrubs, such as Sitka Spruce, Western Red Cedar, and Salmonberry. Any roadways impacted by this project will be restored to similar or better condition.

  • Working with the Community

    Metro Vancouver is committed to working closely with the community to ensure concerns and interests are considered as the project progresses. A community liaison is available to answer questions and listen to concerns throughout the project.

    Local residents and businesses will receive ongoing updates through print notifications, email, web updates, and on-site signage. You can subscribe to our mailing list to receive regular updates via email by clicking here.

  • Engagement

    At Metro Vancouver we make decisions that impact the 2.7 million residents that live in our region. Metro Vancouver engages municipalities, businesses and the general public whenever we are working on a new program, policy, or project across our service areas. Learn more about our engagement principles.

    January 2019 Open House

    Metro Vancouver held an open house for the Annacis Water Supply Tunnel in January 2019.

    Supporting Materials

    May 2020 Public Comment Period

    Thank you for taking the time to participate in our public comment period, held online from May 15 to 29, 2020. With construction scheduled to begin in 2021, the intention of this engagement was to understand any concerns relating to this necessary water infrastructure project.

    Below is a high-level summary of what we heard. Where possible, we will incorporate your input into our project plans and report back on how we are using this input at the end of the detailed design phase in late 2020.

    • Questions about hours of work, noise and vibration
    • Interest in traffic and street parking
    • Questions about air quality and dust control
    • Interest in maintaining safe access for cyclists and pedestrians

    Supporting Materials




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2022 - 2027True22022 - 2027<div class="ExternalClass9DBC65414B9D4E17896E37428C40F250"><p>​Construction</p></div>
2027 - 2028False32027 - 2028<div class="ExternalClass54BD8AEC8AC6407084698437695B27D9"><p>​Landscaping and Restoration<br></p></div>

Contact Us

A community liaison is available to provide updates and respond to questions.

Community Liaison:
Monday to Friday from 8:00 am to 4:30 pm
Phone: 604-432-6200
Email: Information Centre

After Hours Emergencies:

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