The Northern Goldfields Interconnect (NGI) is a 579-kilometre transmission pipeline that extends from the Rosewick connection to the DBNGP in the Mid West region of Western Australia to the Wildara connection into the GGP in the Goldfields region.

A diagram of the NGI can be found here, showing:
• Pipeline capacity.
• Details of receipt and delivery points.
• Key facilities connected to the pipelines.
• Technical and physical characteristics of the pipelines.

APA Ownership


Regulatory Status

The NGI is a non-scheme pipeline

Capacity and Services

The following standard services are offered on the NGI, subject to available capacity:

  • Firm transport.
  • Interruptible transport.
  • In pipe trade.

A description of these services, including APA’s Standard Gas Transportation Agreement (SGTA) can be found on the gas transmission services page.

Non-standard services or alternative terms may be available by negotiation.

Notes on services
Firm services are available over varying terms as set out on the gas transmission services page.

Interruptible services are only available while the pipeline is fully contracted in respect of the corresponding firm service.

APA is progressively rolling out In pipe trade service capability on all key pipelines. APA will prioritise this service rollout in accordance with shipper demand.

Service Usage Information

Service Usage Information Report

Note on service usage
NGI is fully operational on 1 July 2023 

Service Availability Information

36-month uncontracted capacity outlook
12-month capacity outlook

Note on service availability
NGI is fully operational on 1 July 2023 

Policies, Procedures and Requirements

Metering and Measurement

Metering and Measurement obligations are outlined in the SGTA (West) and for this pipeline are set out here.

Gas Specification

In Western Australia, transmission pipeline gas specifications are governed by state legislation – the Gas Supply (Gas Quality Specifications) Act 2009 (2009 Act) – and by regulations made under that Act. The 2009 Act provides for a Western Australian standard specification, which is set out in the regulations (with some variations for particular pipelines), and a reference specification for each pipeline. These specifications are necessary for the operation of the scheme of the legislation.

The standard quality specification for the NGI is set out in clause 1 of Schedule 1 to the Western Australian Gas Supply (Gas Quality Specifcations) Regulations 2010. The reference specifications for the NGI are set out in clause 4 of Schedule 2 to the Regulations.

APA will measure and/or monitor gas quality in accordance with relevant obligations under contract. Quality obligations are outlined in the SGTA (West) and the 2009 Act and underlying regulations, where applicable.

Credit Support

APA has minimum credit support requirements that are a pre-condition to gaining access to pipeline services. APA's credit support requirements are set out here.


If you are interested in acquiring gas transmission services for this pipeline, you can contact us on 08 6189 4300 to discuss your requirements. Alternatively, you may wish to make an enquiry by emailing us at [email protected].

We encourage potential customers to contact APA early when considering the gas supply and transport needs. Early discussion of needs improves the likelihood that APA can tailor services to meet them.

Formal Access Request

Potential customers do not have to submit a Formal Access Request to gain access to an APA pipeline. If you are interested in acquiring services for this pipeline, you can contact us at the contact details above to discuss your requirements.

For APA's non-scheme pipelines, you have a right to make a Formal Access Request pursuant to Rule 559 of the National Gas Rules. Lodging a Formal Access Request triggers a formal process of Access Offer and information exchange between APA and the potential customer. Details are in APA's User Access Guide.

You can make a Formal Access Request by completing in-full the relevant User Access Request Form for this pipeline and emailing it to [email protected].

Environmental Land and Heritage Approvals

Land access

APA has applied for an easement to contain the pipeline. An easement is an agreement registered on the title of the land that sets out the rights of a pipeline owner to install and maintain the pipeline and also outlines the requirements of the landowner in the affected area of the easement.

Approvals process

This project is subject to a comprehensive program of regulatory approvals, and landowner and community consultation, which has been assisting APA in finalising the pipeline alignment and managing and mitigating any identified impacts.

APA will prepare an Environmental Management Plan that demonstrates how APA will manage any potential environmental impacts resulting from the project. APA will work closely with relevant authorities to gain all necessary approvals for the pipeline development. These include approvals for heritage, environment, licencing, construction, commissioning, and ongoing operations and maintenance.