Snowy Hydro 2: Australia's Failing Pumped Storage Power Station

Summary of the Video’s Arguments on Snowy Hydro 2 (“Snowy 2.0”)

1) Geological mishaps began almost immediately

• Dec 2022: A sinkhole opened in Kosciuszko National Park (southeastern Australia)—an unusual event given the area’s granite alpine geology.
• The sinkhole formed directly above a tunnel-boring machine (TBM) named Florence.
• Florence had advanced only about 150 meters of an intended ~15 km tunnel after getting stuck in saturated mud.
• The project continued despite conditions that required a slurry system to stabilize soft, waterlogged ground.

2) A major planning/design mismatch worsened underground failures

• Snowy Hydro promoted Florence as dual-mode (capable of hard rock and soft ground).
• But the slurry support plant needed for soft-ground excavation was not fully built when drilling started.
• Consequences described:
  • mud inflows overwhelmed the TBM,
  • operations slowed dramatically (pump out mud, clean systems, repeat),
  • and ground destabilization ultimately contributed to the sinkhole.

3) Project cost and schedule collapsed into repeated resets

• The project was announced in 2017:
  • expected cost: about A$2 billion
  • original delivery target: power by 2021
• Reported cost escalation:
  • Dec 2017 feasibility: A$3.8–4.5B
  • 2019: about A$5.1B
  • 2022 (after early TBM failures): reportedly around A$8B
  • 2023 “reset”: A$12B
    • first power pushed to late 2027
    • full operation to 2028
• The video argues this is especially troubling because major underground failures happened before the project completed significant work.

4) Disaster compounded by bushfires and COVID-era supply disruptions

• Black Summer bushfires (2019–2020): damaged the construction zone and triggered evacuations.
• COVID-era impacts: disrupted supply chains and limited access to overseas specialists, delaying progress.

5) Organizational blame and governance controversies intensified

• Paul Broad (Snowy Hydro CEO at the time) resigned in Aug 2022 after insisting the project was on track.
• The contractor consortium experienced major disruption:
  • Coats Group collapsed into administration
  • another company absorbed parts of the work to keep site activity going
• Feb 2023: Dennis Barnes became CEO, tasked with “opening the books.”
• The video claims later criticism focused on:
  • early optimism and public messaging,
  • governance that “looked effective on paper,”
  • shifting estimates and missed targets that became harder to justify as costs rose.
• Executive bonuses/performance payments tied to missed milestones are also presented as an accountability flashpoint.

6) Underground complications continued after the sinkhole era

Even after Florence was freed, new issues emerged:

• July 2023: A grouting/foam reaction produced toxic isocyanate gas, forcing urgent evacuation.
• 2023–2024: other tunneling progressed, including emergency/ventilation work by a TBM named Kirsten, and further excavation of the cavern.
• Aug 2024: Florence stalled again due to rock pinching (hard rock squeezing the TBM), requiring specialist water-jet cutting to free it.
• Apr–May 2024: a drill-and-blast incident allegedly involved an improperly timed charge, collapsing rock into an adjacent tunnel; sources describe attempts to accelerate beyond conservative limits.
• A 4th TBM was added in 2024, which the video links to an earlier claim by Chris Bowen that it should have been ordered sooner to reduce dependence on a single stalled drive.
• Feb 2025: a massive ventilation fan imploded during testing; later prohibition notices were issued due to problems across multiple ventilation systems.
• Industrial relations worsened: strikes/stoppages over pay, schedules, staffing, and underground conditions caused further delays.
• Oct 2025: Snowy Hydro stated progress was ~67% (by scope) and said another cost revision was likely.

7) Environmental impacts: the “tiny footprint” claim is challenged

• Snowy Hydro claims the direct construction footprint is about 0.01% of the park.
• Critics argue this understates harm because it omits:
  • underground reshaping,
  • spoil dumps,
  • species movement and water-system changes.

Key environmental concerns raised:

• Spoil volume: tunnel excavation plus cavern works produce about ~9 million cubic meters of rock, stored in placement areas that could threaten waterways if containment fails.
• Connected catchments: pumping between the lower (Talbingo) and upper (Tantangara) reservoirs could create biological connectivity between ecosystems that were historically separate.
  • This may redistribute organisms (fish, eggs, plant material, pathogens), including invasive species.
  • The video highlights risk to a critically endangered native fish (galaxias), while noting predator/invasive species in the lower system (e.g., redfin perch and “mosquito fish” / Gambusia).
• Biocurity exemptions: NSW approvals in May 2020 allowed Snowy Hydro exemptions to move species that would otherwise be restricted.
  • The video portrays this as unprecedented and politically ironic for a climate infrastructure project.

8) By 2026, construction is improving—but the core purpose is threatened by delays

• Milestones mentioned include:
  • Lady Eileen Hudson breaking through into the main cavern area (May, per the video),
  • and a shift from raw excavation toward power-station fit-out (turbines, generators, transformers, cabling).
• However, the official timetable still states:
  • first power late 2027
  • full commercial operation in 2028
• A new cost review is underway, and Snowy Hydro has already acknowledged A$12B may not be the final figure.

9) What happens to Australia’s grid if Snowy 2.0 arrives late?

The video argues that late delivery weakens Snowy 2.0’s role as large dispatchable storage—needed to offset renewable intermittency as coal plants retire.

Possible compensations discussed:

• more grid-scale batteries,
• more gas peaking capacity,
• demand-response programs,
• or extending existing coal plants.

10) Overall verdict: a national megaproject turned into a costly “white elephant” narrative

• Supporters’ position: Snowy 2.0 is still a necessary long-term asset once complete, with pumped hydro designed to operate for a century or more.
• Critics’ position: it has become a politically oversold, mismanaged, and overly expensive project—captured in the “legacy” framing:
  • a $2B launch has become an A$12B open hole,
  • early paper governance and optimism didn’t match underground reality,
  • repeated TBM, safety, and industrial relations setbacks have made outcomes uncertain.

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Presenters or Contributors Mentioned

• Narrator / presenter (unnamed; speaks throughout)
• Michael Turnbull (Malcolm Turnbull) – former Prime Minister who championed the project
• Chris Bowen – Australian energy minister (quoted via media release)
• Paul Broad – Snowy Hydro CEO (resigned Aug 2022)
• Dennis Barnes – Snowy Hydro CEO (took over Feb 2023)
• Kirsten / Florence / Lady Eileen Hudson – TBMs referenced as named machines
• Bruce Mountain – energy expert referenced as an early critic
• Malcolm / Turnbull – later sold pumped hydro projects to AGL (company mentioned)
• Safe Work NSW – regulator referenced