Thacker Pass Phase 1 capex up 31%: schedule and risk notes for mine planners
Reviewed by Joe Ashwell

First reported on MINING.com
30 Second Briefing
Lithium Americas has lifted Phase 1 capex for the Thacker Pass lithium project in Nevada by 31% to $3.83 billion, adding $895 million and raising total funding needs by about $995 million as higher labour installation rates for piping, steel and equipment add $245 million and tariffs/logistics a further ~$100 million. The GM-backed joint venture still targets 40,000 tonnes per year of battery-grade lithium carbonate from 2028, enough for roughly 1 million EVs annually, with peak construction now expected in 2026 and mechanical completion in late 2027. Lithium Americas plans to bridge the cost gap through joint venture contributions and remaining US DOE loan reserves, but the higher 2026 spend of $1.7–$2.0 billion versus $1.3–$1.6 billion tightens construction productivity and financing headroom.
Technical Brief
- Higher labour installation rates for piping, steel and equipment alone add $245 million to Phase 1.
- Tariffs and logistics contribute roughly $100 million of the capex uplift, separate from labour-driven overruns.
- Lithium Americas now guides 2026 Phase 1 spend at $1.7–$2.0 billion, up from $1.3–$1.6 billion.
- Additional funding requirement rises by about $995 million, exceeding the $895 million direct capex increase.
- Cash and restricted cash total about $1.3 billion as of 30 September, including ~$360 million at the JV.
- Market reaction was immediate, with LAC shares dropping nearly 8% to C$2.48, valuing it at ~C$544 million.
- Cost inflation tied to US wages, skilled labour shortages and tariffs signals tighter delivery risk on similar domestic lithium builds.
Our Take
With Lithium Americas’ market capitalisation (about US$382 million) now well below the revised Phase 1 capex of US$3.83 billion, the project is firmly in the category where US Department of Energy and General Motors support will likely be structurally important, echoing Washington’s post-2025 critical minerals strategy that is backing more than 180 projects via loans and offtake-style tools.
Thacker Pass sits within a cluster of Nevada–Oregon McDermitt Caldera lithium stories in our coverage, including Jindalee Lithium’s stewardship MoU and faith-based investor pressure on GM over Indigenous rights, so further cost escalation could give local communities and ESG-focused investors more leverage over project pacing and design choices.
Prepared by collating external sources, AI-assisted tools, and Geomechanics.io’s proprietary mining database, then reviewed for technical accuracy & edited by our geotechnical team.
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