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Restarting America’s Highest-Grade Silver Mine | Heather White - Sunshine Silver

The Deep Dive Sep 30, 2026 5:05

Summary

CEO Heather White says Sunshine's Idaho project is North America's highest-grade silver resource: 264 million ounces at over 1,000 grams per ton.

The historic mine produced over 400 million ounces before undercapitalized, debt-laden prior owners went bankrupt; the Electrum Group bought the project in 2010.

A March SK-1300 initial assessment, the US-listed equivalent of a 43-101 PEA, outlines an NPV above $2.2 billion at $60 silver.

Roughly $600 million of installed infrastructure, including drifts and a 4,000-foot shaft, supports a targeted first production by end-2028.

Watch execution: three feasibility studies are due in the first half of 2027 and an updated mineral resource estimate is expected in early 2027.

Steve Hyland's takeaways

  • Top takeaway Says his team only discovered Sunshine while setting up the interview and he was blown away by the project's grade, framing it as a big silver story worth watching while the company proves it can execute.
  • Jokes that if the stock becomes massive, The Deep Dive will claim it was the whole reason behind the success.

Heather White's takeaways

  • Top takeaway Positions Sunshine as America's must-own silver developer, arguing that grade is king and that its resource is the highest-grade silver deposit in North America.
  • Attributes the mine's previous failure to undercapitalized, debt-laden prior owners and low silver prices rather than the asset itself, which she says created the 2010 buyout opportunity for the Electrum Group.
  • Argues the roughly $600 million of installed infrastructure, including the deep shaft and a new hoist, allows a near-production timeline with first silver targeted for the end of 2028.
  • Invites investors to judge execution against specific milestones: an updated mineral resource estimate in Q1 2027 and three feasibility studies completed in the first half of 2027.
  • Frames the company as newly public since its June 4 NYSE debut, telling viewers to keep watching as the story develops.