Detailed Planning

The proposed HumeLink will provide a new transmission connection to reinforce the NSW Southern Shared Network and increase transmission between new generation sources and demand centres.

The proposed scope of the preferred option includes new 500 kV lines in an electrical loop between Maragle, Wagga Wagga and Bannaby (Option 3C).

Key Dates

Jul 2021 Project Assessment Conclusions Report published
Dec 2021 Expected final investment decision and AER approval
Nov 2022 Expected EIS approval
Jul 2024 Expected Construction Commencement
Dec 2026 Expected Construction Completion


Procuring Agency: TransGrid.


Dec 2018 The Energy Security Board's Integrated System Plan - Action Plan stated that AEMO is working with Snowy Hydro and TransGrid to refine and extend ISP modelling to better understand the costs, benefits and factors that affect the timing of HumeLink.
Jun 2019 TransGrid published the Project Specification Consultation Report (PSCR).
Jul 2019 AEMO released an Insights paper in support of the 2018 ISP, which flagged the need to accelerate the project timeline in preparation for Snowy 2.0.
Jan 2020 Transgrid published the Project Assessment Draft Report (PADR), which suggested the preferred option for HumeLink as Option 3C. Option 3C provides more opportunity for route diversity, which will provide greater resilience to ‘high impact low probability events’ and unlock new renewable energy resources in the region, such as Snowy 2.0.
Jan 2020 The Federal Government announced the signing of a $2 billion deal with the NSW Government, which includes joint underwriting of delivery of the HumeLink project. However, specific allocation of funding was not confirmed.
Jul 2020 Project Assessment Conclusions Report Published (finalisation of RIT-T process).
Jul 2020 In its 2020 Integrated System Plan, AEMO identified HumeLink as a critical project and provided updated costings for the project.
Mar 2021 TransGrid identified two preferred route options for the project. The preferred route is expected to be announced later this year. The two options include: a new route within Green Hills State Forest which moves transmission across public land instead of private farmland, and a new route east of Barlow and north of Blowering Reservoir, avoiding Tumut Airport.
Jul 2021 TransGrid published the Project Assessment Conclusions Report (PACR).