MCILVENNA BAY (CANADA)
McIlvenna Bay is part of the prolific Flin Flon Greenstone Belt located in east-central Saskatchewan
This underground copper-zinc-gold-silver project entered cold commissioning in February 2026 with Commercial production expected in mid-2026. Based on Foran Mining's 2025 Project Feasibility Study, the initial life of mine is 18 years, and it is expected to produce on average 41 million pounds of copper, 20,000 ounces of gold, 444,000 ounces of silver, and 54 million pounds of zinc annually.
McIlvenna Bay Project Progress
Updated in February 2026 by Foran Mining.
Advancing McIlvenna Bay
As of February 2026, mine construction was 91% complete and commissioning has commenced. Commercial production of copper concentrate and zinc concentrate is expected in mid-2026.
As of February 28, 2026, project construction reached 91%.
Surface Construction Works
Surface construction activities continued to progress toward completion, with key milestones achieved across the processing and paste infrastructure. Major works completed during the period included the installation of thickener tanks, placement of thickener concrete, and final process plant grading. Installation of secondary steel and tank components for the flotation infrastructure advanced as planned, alongside tank installations at the paste mixing area.
Power Infrastructure
Successful energization of the 85‑kilometre, 110‑kilovolt transmission line, providing permanent grid power to the site. The transmission line was completed ahead of schedule and on budget, enabling stable, reliable power to support commissioning activities and the transition to operations. Permanent grid connection materially reduces residual construction risk and underpins the project readiness to advance through the remaining commissioning phases.
Ore Stockpile Development
Ore stockpile development progressed in line with plan, supporting near‑term plant start‑up requirements. Approximately 35,000 tonnes of ore were added to the surface stockpile during the period, bringing total stockpiled ore to approximately 271,000 tonnes at month end. Stockpile levels are aligned with the previously defined target of approximately 272,000 tonnes ahead of plant start‑up, providing a sufficient buffer to support commissioning and early ramp-up activities.
Underground Development
Underground development continued to advance with approximately 505 metres of development completed in February, 2026. This included approximately 70 metres in the priority decline heading, maintaining alignment with planned development sequencing. Progress in underground access and infrastructure continues to support ongoing production readiness and provides flexibility as the operation transitions from development toward steady-state mining.
Successful mechanical commissioning was completed on major infrastructure including the primary crusher, grinding electrical room, and the SAG and ball mills, alongside critical mechanical components within the flotation and process water circuits. Commissioning and turnover of the emergency diesel generators were also completed.
Cold commissioning advanced across key comminution and infrastructure systems as the project continued preparations for plant start‑up. Initial idle runs were successfully completed on the ball mill and primary crusher, alongside first energization and testing of the grinding electrical rooms. Instrument air systems were deployed to support equipment testing and system verification, confirming mechanical completion of major comminution assets and enabling progression to subsequent commissioning stages.
Downstream processing systems continued to progress through structured testing and functional checks, with flotation circuits and thickeners advancing through planned commissioning activities. Work during the period focused on equipment integrity, controls verification, and readiness for the introduction of process materials.
KEY HIGHLIGHTS
Location
Mine type
Metals mined
Expected mine life
Deposit type
Ownership
* Historical reports related to mineral reserve and mineral resource for Foran Mining can be found on sedarplus.ca.
GEOLOGY AND MINERALIZATION
The McIlvenna Bay Project is a volcanic‑hosted polymetallic deposit located within the Flin Flon Greenstone Belt, one of Canada’s most prolific base metal mining districts. Mineralization is characteristic of a volcanogenic massive sulphide (VMS) system and occurs as stratabound massive to semi‑massive sulphide lenses, underlain by copper‑rich stringer and stockwork zones within altered felsic volcanic rocks. Copper and zinc are the primary metals, with associated gold and silver, and the deposit remains open along strike and at depth, supporting potential for future resource growth.
TESLA ZONE TARGET
The Tesla Zone forms part of the McIlvenna Bay Project and is located adjacent to the planned mine area, offering strong potential for resource expansion and extended mine life. Ongoing exploration has delivered consistent high‑grade drill results with thick mineralized intervals, supporting its growth potential.
Discovered in 2022, the Tesla Zone was identified through drilling that intersected significant copper, zinc, and precious‑metal‑rich mineralization. Mineralization occurs as massive sulphides, stringers, and breccia zones, extending over approximately 1,350 metres of strike length and 500 to 700 metres down‑dip.
The target represents a significant near‑mine exploration opportunity, with an estimated exploration target of 28 to 45 million tonnes. It benefits from immediate access to existing infrastructure and remains open down‑dip, highlighting the potential for continued growth. An inaugural mineral resource estimate is expected in the second half of 2026.
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Governance Reports
| REPORT TITLE | LINK |
|---|---|
| ESTMA 2024 | Download PDF |
| ESTMA 2023 | Download PDF |
| ESTMA 2022 | Download PDF |
| Annual Information Form 2025 | Download PDF |
| Annual Information Form 2024 | Download PDF |
| Annual Information Form 2023 | Download PDF |
| Annual Information Form 2022 | Download PDF |
| Annual Information Form 2021 | Download PDF |
| Annual Information Form 2020 | Download PDF |
| Annual Information Form 2014 | Download PDF |
| Reports on Supply Chain Act 2025 | Download PDF |
Historical technical reports for McIlvenna Bay and Foran's financial statements and MD&A can be found at sedarplus.ca
Disclaimer:
*All project economics and related parameters presented on this page are derived from historical technical reports prepared by the project's previous owner. As Eldorado continues to incorporate historical and newly generated technical information into its portfolio reporting systems, this page will be updated periodically as additional information becomes available. Historical technical reports for McIlvenna Bay can be found at sedarplus.ca.