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LITHIUMPEAPROJECT ECONOMICS

Lake Superior Lithium (Thunder Bay Lithium Refinery) PEA: C$4.10B NPV, 48% IRR

ByMining Stocks Research
Aug 20, 2026
Source:Avalon Advanced Materials Inc.
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Avalon Advanced Materials Inc.'s Lake Superior Lithium (Thunder Bay Lithium Refinery) in Thunder Bay, Ontario, Canada has a Preliminary Economic Assessment (PEA) outlining an after-tax NPV of C$4.10B, an after-tax IRR of 48%, and initial capital of C$1.30B. The mine plan runs 30 years at about 30000 tpa LiOH per year.

Avalon Advanced Materials Inc.'s Lake Superior Lithium (Thunder Bay Lithium Refinery) has reported Preliminary Economic Assessment (PEA) results for the lithium project in Thunder Bay, Ontario, Canada. The study headlines an after-tax net present value of C$4.10B at a 8% discount rate. It reflects Avalon Advanced Materials Inc.'s (AVL.TO) latest disclosed economics for the asset.

Economics. The after-tax NPV is C$4.10B using a 8% discount rate. After-tax IRR is 48%. Initial capital expenditure is estimated at C$1.30B. The study models a payback period of 2.5 years. Economics are based on $35,360/t LiOH base case (USD $26,000/t LiOH); Spodumene conc. $1,360/t (USD $1,000/t Spodumene @ 6%).

Production and mine plan. Life of mine is 30 years. Average annual production is approximately 30000 tpa LiOH.

Resources and ownership. The company holds a 100% interest in the project.

These figures are extracted from Avalon Advanced Materials Inc.'s technical disclosures and reflect the most recent PEA on file. Compare this project against other developers and producers in our project economics database, and always verify the numbers against the original technical report before making any investment decision.

Mining Stocks Research

Our Analysis

IRR after-tax
48%

higher than 94% of 16 projects we track

NPV after-tax
C$4.10B

higher than 95% of 19 projects we track

Initial capex
C$1.30B

32% of NPV

costlier than 79% of 19 projects we track

Payback
2.5yrs

slower than 30% of 10 projects we track

Mine life
30yrs
Discount rate
8%
Study price assumption
$35,360/t LiOH base case (USD $26,000/t LiOH); Spodumene conc. $1,360/t (USD $1,000/t Spodumene @ 6%)

The build cost is the story. At roughly 47.4x this company's entire market cap, the C$1.30B initial capex cannot be financed from the balance sheet, and it is far too large for a US$20M nano-cap to absorb through dilution without severe existing-holder pain. The realistic path is project-level debt plus a strategic equity partner, likely a downstream lithium buyer or a major miner. Whoever writes that cheque will demand a substantial stake and pricing power, meaning the 48% after-tax IRR and C$4.10B NPV are the theoretical upside, not the likely return to current shareholders. The economics are the supporting act; the financing structure is the lead.

The returns themselves are strong enough to attract that partner. A 48% after-tax IRR ranks in the top decile of the 16 lithium projects we track, and it clears the 20% hurdle a higher-risk junior with little else in the portfolio needs to secure project finance. The 2.5-year payback is moderate, and the NPV ranks above 95% of peers. The capital intensity is genuinely light at 32% of NPV, lower than the 21% average we track, which helps the funding case even if the absolute cheque is enormous relative to the company. But this is a PEA, scoping-level, with a capital estimate that carries a wide band; the C$4.10B NPV and the IRR are preliminary, not bankable.

The jurisdiction helps: Thunder Bay, Ontario is a mining-friendly setting, and the 30-year mine life supports a long-dated offtake agreement, which is exactly the kind of anchor a strategic investor wants. The study's price assumptions are the sensitivity to watch, but the real question is simpler. Who pays for the build, and what do they take in return? If a partner can be secured on reasonable terms, this works. If not, the gap between the NPV and the market cap is not a signal of mispricing, it is a measure of how much skepticism the market is applying to the financing path. That is the single question that decides this project.

Our take, benchmarked against the project economics in the Mining Stocks database. Figures are estimates drawn from company technical reports — not investment advice; always verify against the source filing.

View the source filing from
Avalon Advanced Materials Inc.
View Source Filing (PDF) →
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