A second 50,000-meter drill program was already 37,000 meters complete as of July 30, running concurrently with a feasibility study scheduled to begin in Q3 2026
Decision Focus
On July 30, 2026, Selkirk Copper Mines Inc. released an updated mineral resource estimate for the Minto copper-gold-silver mine in Yukon, reporting a 280% increase in measured and indicated resources to 47.8 million metric tons. The updated inventory covers both underground and open-pit components and feeds directly into a preliminary economic assessment targeting 12 to 15 years of production at 4,100 metric tons per day. For Mining Operations Directors tracking brownfield copper restarts or monitoring workforce and supply chain exposure in the Yukon corridor, this is the signal that Minto has moved from a care-and-maintenance asset to an active development project with a defined production horizon.
90-Second Brief
Now, selkirk Copper Mines, formed when Selkirk First Nation acquired the idled Minto operation and partnered with Venerable Ventures Ltd., completed a 52,288-meter inaugural drill program that tripled the measured and indicated resource base. The updated estimate stands at 47.8 million metric tons averaging 0.89% copper, with 26 million metric tons of that total in higher-grade underground areas at 1.14% copper. A second 50,000-meter drill program was already 37,000 meters complete as of July 30, running concurrently with a feasibility study scheduled to begin in Q3 2026. The asset carries existing infrastructure, a functioning mill, mine roads, and established underground and open-pit workings, making the restart path more capital-efficient than a greenfield build.
What Is Really Happening?
Minto operated for 16 years and produced more than 500 million pounds of copper before shutting down in 2023 under its previous operator. The closure left behind permitted infrastructure, a functioning mill, and a resource base that had not been drilled to the density required to support a credible restart case. In roughly 12 months, Selkirk completed 175 holes across the central mine area, upgraded resources across five zones including Minto North, Minto Main, Area 118, and Ridgetop, and revised the mine design to clearly disaggregate the underground and open-pit envelopes — sufficient to feed a preliminary economic assessment.
The Indigenous-led ownership structure places Selkirk First Nation as the landowner-operator rather than as an external consultation party. Community consent is built into the corporate structure, not appended as an approval step. For contractors and operators active in the Yukon region, that changes the stakeholder engagement model in ways that matter at the contract and social license level.
Why It Matters for Mining Operations Directors
The practical exposure depends on your operational position. If you are running a copper operation in the Yukon or northern British Columbia corridor and drawing from the same FIFO catchment, a 4,100 tpd restart adds real labor demand pressure to a region that already runs tight on experienced underground miners and processing technicians. At 250 kilometers north of Whitehorse, Minto requires dedicated FIFO logistics infrastructure that will compete directly with established operators for the same tradespeople and technical staff.
For procurement teams, the existing infrastructure means the restart bypasses the heaviest mobilization phase of a greenfield build, but it still requires mobile fleet commissioning, mill refurbishment, and reagent supply chain establishment. If your key suppliers operate in the Yukon corridor, expect capacity tightening as the project moves from feasibility toward a construction authorization decision.
The grade split between underground and open-pit components deserves attention: the underground resource carries copper at 1.14%, against 0.59% in the planned open pit. That differential will determine the operating sequence and the relative intensity of underground versus surface equipment demand at restart. Operators and contractors assessing Yukon copper exposure should treat the underground component as the economic engine in this inventory, not the open pit.
Forward View
Three fronts warrant active monitoring. First, the feasibility study commencing in Q3 2026 will set the capital cost estimate and operating cost assumptions that determine whether a construction decision follows. No construction authorization has been issued; the PEA is the next formal milestone, and its outputs are not yet public.
Second, Phase 2 drilling remains incomplete — 37,000 meters of 50,000 planned as of July 30. If results continue the Phase 1 trend of converting inferred material into indicated and measured categories, the measured and indicated total may grow further before the feasibility study closes, potentially strengthening project economics.
Third, the regulatory path for a restart on an existing permitted operation in Yukon differs from a new mine application but is not automatic. Environmental assessment obligations, water license renewals, and consultation processes under Yukon’s modern land claims framework remain open variables on the timeline.
What Is Still Uncertain
The PEA has not been released. No capital cost estimate, operating cost assumption, or financing structure has been disclosed publicly. The 12 to 15-year production target at 4,100 tpd is a planning assumption embedded in the current mine design, not a confirmed feasibility output. Phase 2 drilling results are still being generated, and no final resource update incorporating Phase 2 data has been issued. Whether the project secures construction financing on the current implied timeline cannot be inferred from this resource estimate alone.
One Question for Your Team
If Minto advances to a construction decision in 2027 or 2028, which of your current workforce, contractor, or equipment supply arrangements in the Yukon and northern British Columbia corridor would face direct competition from a 4,100 tpd copper operation entering simultaneous ramp-up?
Sources
- Miningnewsnorth — Selkirk Copper upgrades Minto resources (Link)
