Will HVC MLE capex estimate exceed CAD 2.4B by end of 2026?

Engineering 90% complete and procurement 95% complete substantially reduces scope for further capex escalation. Most cost surprises in mining projects occur during engineering definition and procurement/contract awards — both are now nearly done. Remaining risks are fabrication delays and delivery/installation. These carry cost risk but typically less than full engineering scope changes. Downgrade from prior 0.40 to 0.25 reflecting de-risking through engineering/procurement completion.

The $2.4B ceiling represents top of current $2.1-2.4B range — a breach requires costs 14% above midpoint. With 90%+ engineering and 95%+ procurement done, most scope and price risk is crystallized. Management explicitly mentioned tariffs, inflation, and diesel cost pressure in Q1 but said guidance unchanged. Resolution date Feb 28, 2027 captures Q3 and Q4 2026 earnings calls plus possibly FY2026 guidance update. Low residual probability of breach.

QB2 taught the industry that mining projects inflate beyond top-of-range at sanction. HVC MLE is now past sanction with engineering/procurement near-complete. But construction-phase surprises are common in large mining projects. Canadian mining in particular has seen project extensions on Voisey's Bay, Kemess, and others. Peak year spend in 2026 ($900M-$1.2B) implies most of the cost realization is happening in the next 12 months. A surprise during peak year could push over the $2.4B ceiling.

Prior analysis centered on whether the 15-20% capex inflation at sanction would repeat during execution. Q1 2026 evidence suggests the $2.1-2.4B sanction estimate is holding through early execution. Engineering near-complete reduces one major risk vector. But Canadian mining project cost overruns during construction phase are not rare. Downgrade from 0.40 to 0.25.

The question asks whether HVC MLE capex estimate will EXCEED $2.4B by end of 2026. This means a formal revision to management's guidance. Given that 90% of engineering and 95% of procurement is done and guidance is currently unchanged, a formal revision requires either (1) a delivery delay significant enough to trigger contingency use, or (2) a scope addition. Neither is currently flagged. Probability below 25%.

I'm slightly more cautious. The base rate for a major mining project at HVC's scale holding within original range through construction completion is not high. Tariff risk on imported equipment could bite. Diesel inflation in Chile/Canada adds pressure. Middle East supply chain disruptions could extend delivery timelines. Even if 90% of engineering is done, the 10% remaining often contains the hardest decisions. I'll stay at 0.30 vs. lower from my peers.

Engineering 90% procurement 95% done. Guidance reaffirmed. Risk reduced but not eliminated. Moving from 0.40 to 0.25.

Low probability of breach. Most scope crystallized. Construction-phase risks remain but are typically smaller impact than engineering/procurement phase risks.

Mining projects commonly exceed top of range during construction. Even with engineering done, the last phases bring surprises. 0.28 balances the de-risking from Q1 with the structural base rate.