Where it sits — roads, power, access.
Eau Claire is on a 55,000-hectare land package in the Eeyou Istchee / James Bay region of northern Quebec. Year-round access runs the Route du Nord gravel road from Chibougamau to Nemaska, then crosses the Eastmain Reservoir and the EM-1 spillway on a Hydro-Québec-maintained all-season road, then 6 km on a Fury-maintained resource road. Operational 40-person camp on site.
The infrastructure story is the single biggest reason this project's economics work at a C$217M base-case capex: a 120 kV Hydro-Québec substation sits 18 km from the deposit. Tie-in is budgeted at C$13M. Site load is 9.3 MW — all from cheap Quebec hydro. Clean-grid economics plus low electricity opex. Saves roughly $50–100M versus a comparable greenfield that would need a long powerline or diesel gensets, and knocks a full ESG concern off the list.
Dependency risk, though: roads and power both route through HQ infrastructure. HQ access and permit relationships are load-bearing for the whole project.
Type, depth, strip ratio.
Moderately dipping en-echelon quartz-tourmaline vein system striking NW–SE over 1.4 km of strike. Individual veins up to 1 m; stacked veins plus altered halo give mineralized widths of 1.8–12 m, averaging ~3.0 m. The deposit outcrops at surface and is proven below 600 m depth.
Mine plan is primarily underground — 702 koz at 5.22 g/t diluted from 4.40 Mt, about 84% of recovered ounces — with two small open pits providing 132 koz at 2.50 g/t diluted from 1.73 Mt over 8 years. UG method is longitudinal longhole stoping with backfill, 1.8 m minimum mining width, 15 m sublevels, 40-tonne trucks via ramp at 1,200 tpd full-rate. Contract mining is assumed.
The 7.73 strip ratio looks high on paper. In context — a thin skim across an outcropping vein providing starter mill feed — it prints cash.Strip ratio, open pit / LOM
At 2.50 g/t diluted grade and $2,400/oz gold, the open pit generates gross revenue of roughly US$200/t against total mine-to-gate cost near US$50/t. The pit exists to feed the mill while the UG ramps, not to carry the economics.
Sub-5,000 tpd throughput is also a regulatory design choice — it ducks the federal Impact Assessment trigger under SOR/2019-285 and keeps permitting in the provincial COMEV/COMEX channel under the 1975 James Bay and Northern Quebec Agreement, with Cree participation. That's material: a federal IA would add years.
Top-quartile — genuinely.
This is where the project is quietly best-in-class. Recoveries of 96–98% under optimized cyanidation (PEA uses 95% conservatively). GRG of 39%, gravity alone takes 24% of gold — coarse gold, lower reagent load, a smaller CIL. Bond Work Index of 11.2 kWh/t — soft ore, low grinding energy. Leach kinetics 8–24 hours, modest NaCN at 1.25 kg/t, minimal preg-robbing.
Tailings are non-acid-generating (NP/AP = 3.4). That is not a small detail. It means a lighter liner, lower closure cost, and no perpetual water-treatment liability — the thing that has bankrupted more mine reclamation budgets than almost any other single item.
The PEA, at a glance.
SGS Geological Services ran three cases, all at US$2,400/oz gold, 0.73 USD/CAD. Base Case = full on-site crush / mill / CIL. Hybrid = two years of toll milling followed by on-site build. Toll = all off-site processing, 205 km one-way haul.
| Base Case | Hybrid | Toll Milling | |
|---|---|---|---|
| Initial CapEx | C$217M | C$216M | C$117M |
| Sustaining CapEx | C$66M | C$66M | C$66M |
| Total Capital | C$283M | C$282M | C$184M |
| LOM Cash Cost | US$892/oz | US$906/oz | US$1,009/oz |
| LOM AISC | US$1,140/oz | US$1,153/oz | US$1,170/oz |
| After-Tax NPV₅ | C$554M | C$610M | C$639M |
| After-Tax IRR | 41% | 53% | 84% |
| Payback (post-production) | 2.5 yr | 1.5 yr | 1.1 yr |
Life of mine is 11 years, 834 koz recovered at 4.46 g/t diluted, averaging 75,852 oz/yr. Total mill feed ~6.1 Mt.
Caveats on the headlines
Three things a thorough reader should underline in pencil:
- The Toll Milling case is hypothetical. The PEA explicitly says no arrangement has been confirmed with any mill within reasonable distance. Treat the Base Case as the realistic path; the 84% IRR is interesting, not bankable.
- 24% of scheduled PEA production is Inferred. The headline NPV depends on those ounces being at least comparable to M&I when the block model gets re-run. Every hole that converts Inferred is load-bearing.
- AISC of US$1,140/oz is respectable but not world-class. Most best-in-class North American projects sit under US$1,000/oz. Margin compression risk if gold retraces meaningfully.
What it looks like at other gold prices.
The PEA's gold-price sensitivity table is the most honest document the company has filed. It shows where the economics live, and where they die.
At US$1,440 the project becomes marginal (Base NPV drops to C$70M — roughly a quarter of total capital). At US$3,360 the Base Case clears the C$1B NPV line. The asymmetry is real: the project is levered long gold, as any high-AISC vein mine is.
What the drill bit actually did.
Phase 1 was a 13,000 m, 21-hole program aimed at expanding resources along high-grade shoots and adding continuity to the existing resource outside the PEA-identified stopes. Results came in two batches — the initial release on 17 March and the second (today) on 23 April. Read together, they're doing three discrete jobs.
What this means economically
At constant gold price and constant PEA mine plan, these results don't change the NPV. What they change is the probability-weighted value of the envelope and the cost of future capital:
Down-plunge shoot continuity over ~85 m of new vertical extent. Holes 099 and 101 together demonstrate the high-grade shoot keeps going where the block model stopped — at grades 2.5–2.8× the LOM diluted head (4.46 g/t). For a vein deposit of this geometry, that is the single most valuable type of drilling: it suggests the ounce count is a floor, not a ceiling.
True thicknesses of 6.6–7.0 m are materially wider than the 3.0 m average. These are stacked / coalesced vein zones, which are the most mineable UG geometries. Wider stopes = lower cost per ounce.
Hole 097's 10.15 g/t at 24 m depth matters disproportionately. OP ounces pay back capex fastest, so expanded shallow high-grade is the highest-leverage drill result of the batch in a pure economic sense.
Inferred conversion is the financial de-risking event. Phase 2 is fully financed for another 15,000–25,000 m through summer 2026, with 8 holes (3,390 m) already complete. If that converts a meaningful portion of the 24% Inferred-in-PEA to Indicated, it's the critical milestone for PFS-stage financing terms.
Where the friction lives.
- Still a PEA. No reserves. PFS → FS → permits → financing → construction → first gold is realistically 4–5+ years even with clean execution.
- Capex-vs-market-cap asymmetry. C$217M initial capex against a ~US$110M market cap. That's roughly 2.5–3× market cap in capital required. Expect heavy equity dilution, streams, and royalties in the financing stack — or a takeout before build.
- Contract mining assumption exposes opex to a tight James Bay contractor market.
- COMEV / COMEX timeline is at the discretion of the Cree-Quebec review bodies. Fury's 25% Indigenous staffing and First Nations-owned contractor relationships are real but don't substitute for the statutory process.
- Sub-scale standalone. 76 koz/yr is mid-tier bolt-on scale, not flagship. Shapes the universe of natural acquirers.
- Market is pricing ~20% of Base Case after-tax NPV₅. Typical for single-asset pre-reserve juniors. The re-rate to 40–50% of NPV requires either Phase 2 conversion success, a corporate transaction, or a gold price that makes the PEA numbers obviously stale.
So what is this, actually.
The project has structurally strong bones. Outcropping-to-deep vein system; grid hydro at the fence; road access year-round; excellent metallurgy; non-acid-generating tailings; Indigenous relations built in since 2020; a permitting path that ducks federal review. The PEA at US$2,400/oz reports genuinely excellent economics. The Phase 1 drilling, capped by today's 12.50 g/t over 7.02 m outside the block model, is doing exactly what a junior's drill program is supposed to do at this stage. It's extending the shoot geometry down-plunge and converting inferred material. That's the right kind of news — not just a spray of high-grade hits without strategic position.
What this is not: a fully de-risked, construction-ready project. What it is: a structurally clean asset that is converting ounces and has credible optionality to grow from ~1.7 Moz total (M&I plus Inferred) to something materially larger before a build decision. The next 12–18 months of Phase 2 data plus an updated resource estimate will determine whether this rerates on a standalone basis or becomes an acquisition target for a Quebec consolidator.
Read the sensitivity table first. Read the metallurgy section second. Read the block-model-outside drill hole third. That ordering tells you most of what you need.