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| Snowy Hydro 2.0 | |
|---|---|
| Name | Snowy Hydro 2.0 |
| Country | Australia |
| Location | Snowy Mountains, New South Wales and Victoria |
| Status | Under construction |
| Purpose | Pumped hydroelectric energy storage |
| Construction begin | 2019 |
| Expected completion | 2026 |
| Owner | Snowy Hydro Limited |
| Capacity mw | 2000 |
| Storage gwh | 350 |
Snowy Hydro 2.0 is a large-scale pumped hydroelectric storage project expanding the existing Snowy Mountains Scheme in the Australian Alps straddling New South Wales and Victoria. Designed to provide grid-scale energy storage, grid stability and seasonal electricity shifting, the project integrates with Australia's national electricity grid operated by the Australian Energy Market Operator and connects to markets influenced by the National Electricity Market (Australia). Funded and managed by Snowy Hydro Limited, the project has attracted attention from federal and state administrations including the Turnbull Government and the Morrison Government.
Snowy Hydro 2.0 intends to add approximately 2,000 megawatts of dispatchable generation and about 350 gigawatt-hours of storage by linking reservoirs of the Snowy Mountains Scheme—notably Tantangara Reservoir and Talbingo Reservoir—via underground tunnels and pump-turbine stations. The scheme is intended to provide long-duration storage to complement intermittent generation from assets such as Solar power in Australia, Wind power in Australia, and to support reliability services for the Australian Energy Market Operator and the Australian Electricity Market Commission. Proponents compare its role with international projects like the Bath County Pumped Storage Station and the Dinorwig Power Station as enabling higher penetration of renewable resources such as installations by AGL Energy, Origin Energy, and Intergen (Australia).
Initial concepts grew from the original Snowy Mountains Scheme established after World War II under the Menzies Government and associated legislation like the Snowy Mountains Hydro-electric Authority Act 1949. Modern proposals were developed during policy debates involving the Carbon Pricing Mechanism (Australia) era, energy white papers under the Gillard Government and subsequent reviews by the Energy Security Board. The project received formal approvals and federal underwriting across administrations including the Turnbull Government's Snowy 2.0 announcement and funding commitments during the Scott Morrison period. Environmental approvals required interaction with bodies such as the New South Wales Department of Planning and the Department of Agriculture, Water and the Environment (Australia).
Snowy Hydro 2.0 comprises twin underground power stations, extensive tunnels and new headrace and tailrace infrastructure to enable reversible pump-turbine operation using pumped-storage technology derived from firms exemplified by Voith and GE Renewable Energy projects globally. The installed capacity is about 2,000 MW with a storage duration allowing roughly 350 GWh of energy shifting, enabling long-duration discharge comparable to other large pumped hydro sites like La Muela or Cahora Bassa. The design uses high-head, reversible Francis or pump-turbines, concrete-lined tunnels, vertical shafts and caverns excavated with tunnel boring machines similar to projects by Herrenknecht. Operation integrates with dispatch systems and ancillary service markets administered by the Australian Energy Market Operator and will interact with frequency control ancillary services used by entities such as AEMO and regulated under rules by the Australian Energy Regulator.
Environmental assessments examined impacts on alpine ecosystems within the Kosciuszko National Park, threatened species such as the corroboree frog and native vegetation including montane peatlands and alpine ash. Cultural heritage consultations involved representatives from Ngunnawal people and Ngarigo people who have connections to the Snowy Mountains. Concerns cited potential alteration of water flows into the Murrumbidgee River catchment and impacts on wetlands recognized under frameworks akin to the Ramsar Convention processes, prompting conditions from agencies including the New South Wales Environment Protection Authority and submissions to federal environmental ministers like Sussan Ley.
Snowy Hydro 2.0 was justified as addressing system reliability shortfalls identified in reports by the Australian Energy Market Operator and the Australian Energy Market Commission, and as complementary to federal initiatives such as the National Energy Guarantee debates and state-level renewable targets in New South Wales and Victoria. The project attracted investment and underwriting by the Commonwealth of Australia and triggered analysis by market participants including ACIL Allen and consultants like Energeia. Critics invoked market distortion concerns similar to debates over government-backed projects like the Battery of the Nation proposals and compared costs with alternatives such as large-scale batteries deployed by Tesla, Inc. for Hornsdale Power Reserve.
Construction commenced with major tunnelling and civil works contracts awarded to consortia of international and Australian firms, involving tunnelling contractors experienced on projects such as WestConnex and Snowy Scheme maintenance works. Key contractors and subcontractors include companies in the construction and engineering sectors comparable to CPB Contractors, Downer Group, and specialist tunnelling firms akin to Salini Impregilo and Thiess Group. The project timeline set staged commissioning beginning in the mid-2020s with expected completion targets adjusted over time due to ground conditions, supply-chain factors and approvals similar to large infrastructure projects like Melbourne Metro Rail Project.
Public debate has encompassed cost overruns, environmental impacts, Indigenous consultation adequacy and market implications, attracting commentary from political figures such as Josh Frydenberg, Anthony Albanese, and environmental organizations like the Australian Conservation Foundation and the Nature Conservation Council of NSW. Legal challenges and community protests referenced precedents from campaigns against projects like Adani Carmichael mine and stimulated parliamentary scrutiny through hearings in bodies including the Parliament of Australia and state assemblies. Supporters emphasise long-duration storage benefits for integrating renewables championed by proponents such as Mark McGowan and industry groups like the Clean Energy Council.
Category:Hydroelectric power stations in Australia Category:Energy storage