Concept design released for 335 MW pumped hydro project in Australia

EnergyAustralia has released the concept design for a 335 MW pumped hydro energy storage and generation project at Lake Lyell in New South Wales, Australia.

EnergyAustralia has outlined key components of its project, encompassing the upper reservoir design, access roads, underground powerhouse, switchyard, and water intake location. Positioned approximately 110 km west of central Sydney, the pumped hydro facility is anticipated to generate 335 MW of renewable energy for up to eight hours during peak demand periods. This facility will play a vital role in offering firming and ancillary grid services in the Central West region and across the state. The proposed concept design introduces plans for a new underground powerhouse housing two pump turbines and electrical transformers, accessible through tunnels from portals on the north side of Farmers Creek. The project will integrate existing transmission assets, connecting to the National Electricity Market (NEM) via a new switchyard linked to existing 330 kV transmission lines south of Mt Walker.

Currently in the feasibility stage, a decision on proceeding is likely in the second half of 2025, with construction expected to span at least four years, suggesting potential operation by 2029.