E3 Lithium’s proven and probable reserve at the Clearwater Project is 1.13 million tonnes of lithium carbonate equivalent. The resource figure carrying this week’s summit coverage is 16.2 million tonnes. Both come from the same company and carry the same effective date of 20 June 2024. By our arithmetic the reserve is 7% of the resource. That gap is no error in either number. It is the entire reason the two get reported separately.
A mineral resource estimates what a formation contains, built from drilling, brine sampling and reservoir modelling. A mineral reserve is the portion a company has shown it can extract and sell at a profit, backed by a mine plan, a process design and a price assumption, signed by a qualified person under National Instrument 43-101. Converting one into the other removes whatever fails a test: brine you cannot move at rate, reservoir you cannot reach from a licensed surface location, tonnes that cost more to recover than the product fetches. The 15.07 million tonnes that did not survive are not fictional. They have no plan attached yet.
Key facts
- E3 Lithium Ltd. reports a measured and indicated mineral resource of 16.2 million tonnes of lithium carbonate equivalent across the Bashaw District, per E3 Lithium Ltd. resource disclosure effective 20 June 2024.
- E3 Lithium Ltd. reports proven and probable mineral reserves at the Clearwater Project of 1.29 million tonnes of lithium hydroxide monohydrate, equal to 1.13 million tonnes of lithium carbonate equivalent, per the National Instrument 43-101 technical report on the Clearwater pre-feasibility study, effective 20 June 2024.
- The Clearwater Project pre-feasibility study states initial capital expenditure of US$2.47 billion and an after-tax net present value of US$3.72 billion at an 8% discount rate, per E3 Lithium Ltd., effective 20 June 2024.
- E3 Lithium Ltd. and Epsilon CAM Pvt. Ltd. signed a non-binding memorandum of understanding for up to 5,000 tonnes a year of battery-grade lithium carbonate, given as up to 40% of a proposed Stage 1 rate of 12,000 tonnes a year, per E3 Lithium Ltd., 14 September 2026.
- Natural Resources Canada committed $36,507,091 in non-repayable funding, 75% of a roughly $48 million programme that includes a Clearwater Project feasibility study targeted for the first quarter of 2027, per E3 Lithium Ltd., 10 June 2026.
What the Bashaw District has going for it
The resource deserves better than a dismissal. The lithium sits in Devonian carbonate reservoirs that sixty years of oil and gas drilling already mapped, logged and pressure-tested, so the reservoir engineering starts from data rather than from a guess. E3 drilled two evaluation wells in 2022, took one to 2,670 metres, and flowed 400 cubic metres a day of brine to surface for five days. A field pilot east of Olds ran through November 2023 at 94% lithium recovery. Most brine projects burn five years working out what the fluid does underground. Here somebody chasing something else paid for much of that decades ago.
Why the plant size is set by equipment rather than by geology
Annual output is a function of installed capacity, not of what the formation holds. Production wells, injection wells, brine handling, sorbent columns, an evaporator train, a crystalliser. Each has a throughput, and the smallest sets the number on the nameplate. Geology decides how long the plant keeps running. It has no say in how fast.
The pre-feasibility study designs for 32,250 tonnes a year of lithium hydroxide monohydrate at start-up, averaging 25,850 tonnes a year across a 50-year operating life. By our arithmetic that start-up rate converts to roughly 28,400 tonnes a year of lithium carbonate equivalent. The 12,000 tonne Stage 1 figure now in circulation appears nowhere in that study. It comes from E3’s own offtake announcement of 14 September 2026, and by our arithmetic it runs about 42% of the rate the study was built around. Both numbers belong to the company. They describe two plants, sized two years apart.
What the prospectus entry left out had already been published
Capital cost, schedule and offtake decide whether a design becomes a facility, and on the 2024 plan all of it is on the record. Initial capital expenditure of US$2.47 billion. Operating cost of US$6,200 a tonne of lithium hydroxide monohydrate at start-up, with payback in 4.25 years against a price forecast averaging US$31,344 a tonne. E3 filed a Directive 056 facility licence application on 20 January 2026 and a provincial environmental application on 8 December 2025. Two memoranda of understanding cover offtake, signed 16 October 2025 and 14 September 2026, both non-binding.
The honest complaint is narrower than it looks, and sharper for it. The published capital cost belongs to a 32,250 tonne plant. The rate now being quoted belongs to a 12,000 tonne plant. Nothing has been published for the smaller one, the only one anybody is now proposing to build, and US$2.47 billion does not scale down by proportion because compressors, pipelines and permitting do not shrink the way throughput does. Pairing the 16.2 million tonne resource with the 12,000 tonne rate takes one figure from one document and one from another, producing a project that exists in neither.
Run the check on the published plan and watch what a reserve is for. Take the 1,292,400 tonnes of lithium hydroxide monohydrate in proven and probable reserves, divide by the 50-year average rate of 25,850 tonnes a year, and the answer is 50.0 years. That is the stated mine life, to one decimal, because the reserve was calculated from the plan and the plan from the reserve. Now try the resource. It returns 1,350 years and describes nothing anyone will build. The capital cost for the 12,000 tonne plant is due with the feasibility study in the first quarter of 2027.
