Additional Source of PGMs The East Boulder Mine was initially permitted in 1992. The Environmental Impact Statement and Hard Rock Mine Impact Plan were updated in 1998. Construction of the East Boulder Mine began in 1999. Two 3.5 milelong portals were bored to access the ore. Most of the major above-ground facilities and infrastructure were completed in 2000, and commercial production began in 2003. Initial production averaged over a half ounce per ton. In 2002 the East Boulder Mine produced 125,000 ounces of palladium and platinum. The East Boulder Mine • Accesses the western portion of the J-M Reef • Independent of the Stillwater Mine • J-M Reef is accessed by a system of horizontal adits (nearly horizontal entrances) and drifts (passageways between tunnels)
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