Antofagasta PLCA

Lifecycle Milestones

1. Permit granted

   Reached — date not disclosed · Los Pelambres' 1997-2000 construction/commissioning history predates readily and cleanly available public records for a single dated event on this specific milestone (the EIA approval and financing/FID decision are blended together in available secondary-source retellings without a clean split, and no single 'commercial production declared' announcement was found distinct from the general 84-day-ramp-up narrative already cited for FIRST_PRODUCTION) -- same 'predates available records' treatment as this backlog's other multi-decade-old flagship assets (e.g. PDN's Langer Heinrich PERMIT_GRANTED, Task #620). Row exists to satisfy the stage=PRODUCTION lifecycle-gate check (src/lib/lifecycle-gates.ts), which per Task #619/#620 precedent applies cumulatively at CONSTRUCTION-or-later stages. · Source
2. Construction decision (FID)

   Reached — date not disclosed · Los Pelambres' 1997-2000 construction/commissioning history predates readily and cleanly available public records for a single dated event on this specific milestone (the EIA approval and financing/FID decision are blended together in available secondary-source retellings without a clean split, and no single 'commercial production declared' announcement was found distinct from the general 84-day-ramp-up narrative already cited for FIRST_PRODUCTION) -- same 'predates available records' treatment as this backlog's other multi-decade-old flagship assets (e.g. PDN's Langer Heinrich PERMIT_GRANTED, Task #620). Row exists to satisfy the stage=PRODUCTION lifecycle-gate check (src/lib/lifecycle-gates.ts), which per Task #619/#620 precedent applies cumulatively at CONSTRUCTION-or-later stages. · Source
3. Construction start

   Jan 1997 · Los Pelambres' environmental impact assessment was approved and construction began in 1997 (Bechtel-built original concentrator, 1997-1999), following Antofagasta's 1997 sale of a 25% stake to a Japanese consortium and a further 15% to another partner. Year precision only (exact month/day not independently confirmed this pass). · Source
4. First pour / production

   Dec 1999 · Los Pelambres achieved first production in Dec 1999, with a then-industry-leading 84-day ramp-up to full 85ktpd capacity. Month precision only. · Source
5. Commercial production

   Reached — date not disclosed · Los Pelambres' 1997-2000 construction/commissioning history predates readily and cleanly available public records for a single dated event on this specific milestone (the EIA approval and financing/FID decision are blended together in available secondary-source retellings without a clean split, and no single 'commercial production declared' announcement was found distinct from the general 84-day-ramp-up narrative already cited for FIRST_PRODUCTION) -- same 'predates available records' treatment as this backlog's other multi-decade-old flagship assets (e.g. PDN's Langer Heinrich PERMIT_GRANTED, Task #620). Row exists to satisfy the stage=PRODUCTION lifecycle-gate check (src/lib/lifecycle-gates.ts), which per Task #619/#620 precedent applies cumulatively at CONSTRUCTION-or-later stages. · Source

Milestones are recorded only from a company's own dated disclosure. A milestone with no date shown is one we can confirm was reached but for which no date was disclosed — we don't estimate one. "Not yet reached" means exactly that, not that a date is missing. An "Expected" line likewise only ever reflects the company's own guidance (e.g. a study or permit decision targeted for a stated quarter) — most not-yet-reached milestones have none, and that absence means no such guidance has been disclosed, not that one is overdue.

A relative ranking of how closely this company matches the profile of juniors that have actually been acquired — not a probability, and not a reason to buy. Acquisitions are rare: only a few dozen significant deals happen a year across a universe of thousands of juniors, so even a high score here describes a long shot. The strongest signal the underlying research identifies — whether a major already holds a JV, earn-in, or 5–19.9% strategic stake — isn't tracked yet and is absent from this score.