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Snowy 2.0 Project Nears 70% Completion, Total Cost Remains Unclear Amid Multiple Assessments

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Snowy 2.0: A Deep Dive into the Nation’s Most Ambitious Energy Project

The Snowy 2.0 pumped-hydro project, located in Kosciuszko National Park, is scheduled to begin delivering power by the end of 2028 according to Snowy Hydro.

The project is reported to be 70% complete. The total cost remains subject to multiple estimates and ongoing independent reviews, with Snowy Hydro stating that a formal request for additional funding from the federal government has not yet been submitted.

Project Overview

Snowy 2.0 is a renewable energy infrastructure project designed to store surplus electricity generated from wind and solar sources for later supply to the national grid. Key components include:

  • Underground Power Station: A hydropower station located 800 meters underground.
  • Tunnel Network: 27 kilometers of tunnels connecting Tantangara Dam to Talbingo Reservoir. A 29 km feeder tunnel is also part of the design.
  • Generation Capacity: The facility is expected to provide up to 2,200 megawatts of electricity to the grid.
  • Workforce: The project currently employs approximately 5,500 people.

Cost and Schedule History

The project's estimated cost and timeline have undergone multiple revisions since its announcement in 2017.

  • 2017: Announced with an initial cost of $2 billion and a target completion date of 2021.
  • Post-Feasibility Study: Cost revised to $6 billion.
  • 2019: Cost estimated at $5.1 billion.
  • 2023: Cost revised to $12 billion.
  • October 2025: Snowy Hydro confirmed that costs would exceed the $12 billion budget, stating that more funds would be required.
  • Current Status: A detailed cost reassessment is being conducted by contractor Future Generation Joint Venture (FGJV), expected to conclude in the first half of 2026. An independent review is underway before Snowy Hydro formally requests more money from the federal government.

"The company has described the $42 billion figure as unsubstantiated."

Divergent Cost Estimates

Various sources have provided starkly different estimates for the total financial requirement of the project.

  • Independent Estimates: Energy analyst Ted Woodley and economist Bruce Mountain from the Victoria Energy Policy Centre estimate the total cost could reach approximately $42 billion. This figure reportedly includes direct construction costs ($20 billion), transmission line infrastructure ($12 billion), and interest charges over 15 years ($8 billion).
  • Snowy Hydro's Position: The company has declined to confirm or provide specific figures for the total cost overrun, citing the complexity of the project and the need for accuracy before public disclosure.
  • Financial Review: S&P Global Ratings warned in March that it might downgrade some Snowy Hydro debt due to project delays and cost increases.

New Tunnel Boring Machine

To address construction delays, Snowy Hydro acquired a fourth tunnel-boring machine (TBM) named Monica. The acquisition follows persistent operational issues with an existing TBM, Florence, which encountered difficulties with soft ground and hard rock, resulting in delays and a sinkhole in the national park.

TBM Monica, costing approximately $75 million, is designed for the project's complex geological conditions and is scheduled to begin operations on February 19.

Geological and Engineering Challenges

The Snowy Mountains region presents complex rock formations, faults, fissures, and varying rock density. Experts have noted that Australia has limited recent experience in building pumped-hydro facilities, with the last such facility constructed almost 60 years ago.

Related Projects

The Borumba Pumped Hydro project in Queensland, a separate 2,000-megawatt initiative, also experienced a cost increase to an estimated $18.4 billion, with completion not expected before 2033.

Reactions and Calls for Inquiry

  • Official Response: Federal Energy and Climate Change Minister Chris Bowen expressed disappointment over the October 2025 cost reassessment, stating the government is scrutinizing the project to ensure taxpayer value.
  • Academic Criticism: Bruce Mountain called for a Royal Commission into the project, stating there are "very serious issues of misallocation of resources" with implications for the broader energy transition.
  • Industry Analysis: Energy analyst Saul Kavonic stated the project is illustrative of issues with accountability in government-owned energy assets. Another analyst, Nexa Advisory CEO Stephanie Bashir, suggested it is too late to cancel Snowy 2.0 but recommended it serve as a lesson for proper planning in future infrastructure projects.

"It is too late to cancel Snowy 2.0, but the project should serve as a lesson for proper planning in future infrastructure projects." – Stephanie Bashir, Nexa Advisory CEO

Background on Energy Policy

The Snowy 2.0 project is part of Australian government policy aiming for 82% renewable energy in the national grid by 2030, a 62-70% reduction in emissions by 2035, and net zero emissions by 2050.