US$1.1B EXIM backing for Santa Cruz copper: capex and schedule notes for mine planners
Reviewed by Tom Sullivan

First reported on MINING.com
30 Second Briefing
US Export-Import Bank has issued a new letter signalling up to US$1.1 billion in debt financing for Ivanhoe Electric’s Santa Cruz copper project in Arizona, covering most of the PFS-estimated US$1.24 billion initial capital for a 72,000 t/y operation over the first 15 of 23 years. The updated PFS due in September will incorporate tunnel boring machine access for the underground decline, with box-cut construction targeted before TBM assembly in H1 2027 and first ore to leach pads in H2 2028. Santa Cruz aims to produce 99.9% copper cathode on site via crushing–leaching–SX/EW, bypassing smelting and already holds key permits for reclamation, air quality, dust control, aquifer protection and land use.
Technical Brief
- Preliminary due diligence by U.S. EXIM on Santa Cruz is now complete, de‑risking subsequent credit approvals.
- PFS economics at US$4.25/lb copper show after‑tax NPV of US$1.4 billion and 20% IRR.
- Cash operating cost is estimated at US$1.32/lb, positioning the mine in the lower half of the cost curve.
- Site works already underway include road clearing, fencing and portal area preparation ahead of box‑cut excavation.
- Decline development is scheduled to start mid‑2027, with the orebody accessed roughly 12 months after TBM launch.
- Surface construction of crushing, leach and cathode plants will run in parallel with underground decline advance.
- Key early‑works permits secured cover reclamation, air quality, dust control, aquifer protection and land use.
- Remaining approvals focus on full surface construction and production, so permitting risk now concentrates on plant build‑out.
- If delivered to schedule, Santa Cruz would be among the first large new U.S. copper mines in nearly two decades.
Our Take
The prospective U.S. EXIM debt for Santa Cruz comes alongside White House backing for other domestic copper projects like Highland Copper’s Copperwood, signalling that Arizona copper developments are competing within a broader, policy-driven build‑out of U.S. copper supply chains rather than standing alone.
Ivanhoe Electric’s parallel work with Robbins’ Crossover XRE TBM at Santa Cruz and its copper exploration JV with SQM in Chile suggests the company is positioning Santa Cruz not just as a single asset but as the anchor for a wider copper growth pipeline spanning both U.S. and Andean jurisdictions.
Prepared by collating external sources, AI-assisted tools, and Geomechanics.io’s proprietary mining database, then reviewed for technical accuracy & edited by our geotechnical team.
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