Central Interceptor

Auckland | Tāmaki Makaurau, New Zealand | Aotearoa

Filter projects by:

Market

  • Cities

    Cities EMIA

  • Commercial & Residential

    Mixed Use

    Office

    Residential

    Retail

  • Education

    Colleges & Universities

    Schools

  • Energy

    Carbon capture, utilization and storage

    Geothermal

    Grid modernization

    Hydroelectricity

    Hydrogen

    Microgrids and energy storage

    Offshore wind

    Portfolio Decarbonization and Climate Resilience

    Solar

    Transportation decarbonization

  • Environment

  • Healthcare

    Clinical Hospital

    Life Sciences

    Senior Living

  • Industrial

    Agriculture, Food & Beverage

    Automotive & Heavy Equipment & Machinery

    Digital Infrastructure

    High Performance Logistics

    Manufacturing

    Mining & Metals

    Pharmaceutical/Specialty Chemicals

    Pulp & Paper

  • Justice

  • Leisure

    Arts and Culture

    Hotels and Resorts

    Themed Entertainment and Mixed-Use

  • National Governments

    Civil Works

    Disaster Resilience

    Infrastructure & Facilities

  • Oil, Gas & Chemicals

    Chemical/Petrochemical

    Downstream

    Midstream

    Upstream

  • Sports and Venues

    Collegiate

    Convention Centers

    Olympics & Mega-Events

    Stadiums & Arenas

  • Transportation

    Air Cargo

    Aviation

    Bridges & Tunnels

    Connected and Autonomous Vehicles

    Freight Rail

    Highways & Roads

    Mass Transit

    Ports & Marine

    Transportation decarbonization

  • Water

    Dams & Hydropower

    Flood and coastal resilience

    Industrial Water

    Tunnels, Conveyance, Collection & Distribution

    Wastewater Treatment & Reuse

    Water Treatment

    Watershed and Ecosystem Management

Service

  • AECOM Capital

  • Alternative Delivery Models

  • Architecture and Design

    Architecture

    Asset Advisory

    Climate Adaptation

    Community Engagement

    Interior Architecture

    Landscape Architecture

    Planning

    Urban Analytics

    Urban Design

    Urbanism + Planning

  • Asset Management

  • Cities Solutions

  • Construction Management

  • Converged Resilience

  • Cost Management

  • Digital Infrastructure Services

  • Economics

  • Electric Vertical Takeoff and Landing Solutions

  • Engineering

    Ground Engineering

  • Environmental Services

    Air Quality Consulting and Engineering

    Climate Adaptation

    EHS Management Consulting and Compliance

    Environmental Contracting

    Environmental/Social Impact Assessment and Permitting

    Management Information Systems (MIS)

    Remediation, Restoration and Redevelopment

  • Fabrication

  • Finance

  • Industrial and Commercial Operations and Maintenance

  • IT and Cybersecurity

  • Mobilitics

  • Multinational Investment and Development

  • Pedestrian Modelling (North America)

  • Planning and Consulting

    Geospatial Services

    Pedestrian Modelling

  • Process Development & Implementation

  • Program Management

  • Public-Private Partnerships

  • Risk Management & Resilience

    Critical Infrastructure Protection

  • Simulation Models

    Rail Simulations

  • Strategic consulting

    People + Place Advisory

  • Tunnels, Trenchless Technology and Underground Infrastructure

  • Vertical Transportation Services (North America)

  • Visualization and Virtual Reality

Location

  • Africa

  • Algeria

  • Antarctica

  • Australia

  • Azerbaijan

  • Bahrain

  • Bangladesh

  • Belgium

  • Bolivia

  • Bosnia and Herzegovina

  • Brazil

  • British West Indies

  • Canada

  • Caribbean-Puerto Rico

  • China

  • Colombia

  • Croatia

  • Czech Republic

  • Egypt

  • Eritrea

  • Finland

  • France

  • Germany

  • Greece

  • Greenland

  • Haiti

  • Hong Kong

  • India

  • Indonesia

  • Iraq

  • Ireland

  • Italy

  • Japan

  • Kenya

  • Kingdom of Saudi Arabia

  • Kuwait

  • Liberia

  • Lithuania

  • Malaysia

  • Maldives

  • Mali

  • Malta

  • Mauritania

  • Mexico

  • Monaco

  • Mongolia

  • Montenegro

  • Myanmar

  • Netherlands

  • New Zealand | Aotearoa

  • Norway

  • Oman

  • Panama

  • Papua New Guinea

  • Peru

  • Philippines

  • Poland

  • Portugal

  • Qatar

  • Romania

  • Singapore

  • Slovakia

  • South Africa

  • South Korea

  • Spain

  • Sri Lanka

  • Sweden

  • Switzerland

  • Taiwan

  • Turkey

  • Ukraine

  • United Arab Emirates

  • United Kingdom

  • United States

  • Vietnam

  • Worldwide

The $1.2B Central Interceptor (CI), a wastewater tunnel, will provide resilience to the current wastewater pipeline under the Manukau Harbour, as well as help Auckland manage the needs of a growing city and improve environmental outcomes. The project provides additional stormwater capacity and connectivity for future wastewater projects, allowing for increased capacity and network growth.

CI is designed to work entirely by gravity flows from Grey Lynn to Māngere Wastewater Treatment Plant (MWTP) some 14.7 km away. On route, link sewers, access points and drop shafts collect and transfer storm / wastewater into the tunnel. The design incorporates various gates that attenuate flows thus providing a controlled discharge to MWTP. In addition, CI’s design provided the most effective route to MWTP.

At 14.7 km long, CI will be the longest bored tunnel in New Zealand. CI’s depth varies between 15 and 110 metres from the surface, crossing the Manukau harbour at depths of about 15m below the seabed. With a capacity of 210,000 m3, CI will be connected to two link sewer tunnels as well as 17 above ground sites.

Māngere Wastewater Treatment Plant

Role and Services Provided

AECOM, working alongside McMillian Jacobs Associates as subconsultants to Jacobs as lead designer, started the design of CI in 2014. Ghella Abergeldie Joint Venture (GAJV) was appointed in early 2019 as the Main Contractor by Watercare. Along with their design partners, AECOM continues to provide design services to the GAJV team and will continue to do so until fully operational in 2026. Our services include a range of design management disciplines.

Outcomes and Values

The project’s success is founded in a “one team” philosophy supporting a “best for project” mentality in resourcing, problem solving and decision making. This includes relationship building and close partnering to achieve Client needs. Because of the project’s long direction and changes in personnel, the use of shared technology such as Watercare’s Aconex system has enabled transfer on knowledge and documents to be well maintained. Communication using ProjectWise since inception for shared document management and submission to Client has also been effective during this long timeframe.

To further ramp up capability and capacity to cover resource shortfalls when required, key water personnel from major transport projects were actively demobilised (back-filling them from our flexible pool) to ensure Central Interceptor was on track to meet programme deadlines.