East Coast Gas Grid Expansion Plan

Stages 1 and 2 of the ECGG expansion plan have been completed. These works included construction of additional compressor stations on the South West Queensland Pipeline (SWQP) and the Moomba to Sydney Pipeline (MSP) and have increased gas transportation capacity to the east coast grid.

Stage 3 (expansion) focuses on building capacity to move ~24% more gas between northern basins and southern markets. This includes the proposed delivery of the Bulloo Interlink, a new 336km, 28-inch pipeline connecting the SWQP to the MSP, and two new compressors on the MSP.

The Bulloo Interlink is designed to transport new gas from northern basins such as the Surat in Queensland and the Beetaloo in the Northern Territory, amongst others. Engineering design and planning, along with long lead item procurement, is progressing as part of committed early works funding.

The project would progressively increase MSP capacity from 590 TJ/day to 700 TJ/day. SWQP capacity would increase from 512 TJ/day to 605 TJ/day and capacity between Young and Melbourne would increase from 190 TJ/day to 229 TJ/day.

Stage 4 (storage) focuses on delivering new southern market gas storage to support AEMO’s forecast need for peaking gas-powered generation, as more variable renewable energy is added to the National Electricity Market.

Stage 4 involves the delivery of the proposed new Riverina Storage Pipeline (RSP) in New South Wales (NSW), along with new compression and pipeline infrastructure. Access and approvals and concept design is progressing as part of early works funding.

If progressed, Stage 4 would add new storage capacity in winter 2028 and 2029. The storage project can be delivered in stages, with ~200TJ of storage online as early as 2028, with the potential to expand to ~500 TJ as early as 2029.

Stage 5 (expansion) adds flexibility and amplifies the investments made in Stages 3 and 4, delivering capacity upgrades into the Victorian Transmission System (VTS). The potential project will expand APA’s MSP and VTS systems to 350 TJ/day from Young, NSW to Wollert, Victoria through the addition of new compressors, reconfiguration works and new metering and pressure regulation infrastructure.

The ~84% increase in transport capacity into Wollert, Victoria could be delivered as early as winter 2029 as the Victorian market becomes more reliant on northern gas basins.

APA has reached FID for the full scope of the below related projects, with project delivery now in progress.

Moomba to Sydney Ethane Pipeline (MSEP) conversion project

The Moomba to Sydney Ethane Pipeline (MSEP) conversion project, targeting completion in 2025. APA will invest ~$25 million to deliver this project to provide an additional ~20 TJ/day from Moomba to Victoria or ~25 TJ/day to Sydney. After conversion to natural gas, the incremental MSEP capacity will increase the total southbound capacity from Moomba to Sydney from 565 TJ/day to 590 TJ/day.

Moomba to Sydney Pipeline (MSP) off-peak capacity expansion project

Moomba Sydney Pipeline (MSP) off-peak capacity expansion project, which will deliver two pressure regulation skids to increase capacity in summer months when pipeline maintenance is being undertaken. APA will invest ~$15 million to deliver this project, with new capacity to come online in summer 2025 and 2026. Total new MSP summer capacity on completion will be 80-120 TJ/day, delivering additional earnings in off-peak months and supporting storage refill ahead of peak winter months.