Stillwater Mining Company engages in the development, extraction, processing, smelting and refining of palladium, platinum and associated metals (platinum group metals or PGMs) produced by mining a geological formation in south-central Montana known as the J-M Reef and recycling spent catalytic converters and other industrial sources. The company also engages in expanding its mining development along the J-M Reef, and holds exploration-stage properties at the Marathon PGM copper property adjacent to Lake Superior in northern Ontario, Canada (Marathon) and at the Altar copper-gold property in San Juan Province, Argentina. Segments The company’s segments include Mine Production, PGM Recycling, Canadian Properties, and South American Properties. The Mine Production segment consists of two business components, the Stillwater Mine and the East Boulder Mine. The Mine Production segment engages in the development, extraction, processing and refining of PGMs. The company sells PGMs from mine production under short-term and long-term sales agreements. The PGM Recycling segment engages in recycling spent catalyst material to recover the PGMs contained in the material. The company either purchases the catalyst material processed by the PGM Recycling segment from third-party suppliers for its own account and sells the recovered metals directly, or it accepts catalyst material supplied from third-parties on a tolling basis, processing it for a fee and returning the recovered metals to the supplier. The Canadian Properties segment consists mainly of the Marathon mineral property assets. The exploration-stage Marathon mineral properties include a major PGM and copper deposit located near the town of Marathon, Ontario, Canada, as well as additional mineral properties located adjacent to the Marathon properties. The South American Properties segment consists of the Peregrine Metals Ltd. assets. The principal Peregrine asset is the Altar property, an exploration-stage copper-gold resource located in the San Juan province of Argentina. Mining Operations Stillwater Mine The underground Stillwater Mine near Nye, Montana accesses, extracts and processes PGM ores from the eastern portion of the J-M Reef using mine openings located in the Stillwater River Valley. All surface structures and tailings management facilities are located within the 2,613 acre Stillwater Mine operating permit area, which is administered collectively by the Montana Department of Environmental Quality (DEQ) and the United States Forest Service (USFS). Ore reserves developed at the Stillwater Mine are controlled by patented mining claims either leased or owned outright by the company. The mine is located approximately 85 miles southwest of Billings, Montana and is accessed by a paved road. The Stillwater Mine accesses and has developed a 6.8 mile-long underground segment of the J-M Reef, on various levels between 1,900 and 7,500 feet above sea level. The company is continuing to develop a decline system and additional principal mining levels to access and develop to the west and deeper areas in the central part of the mine. The company processes ore from the Stillwater Mine through a surface concentrator facility (mill) adjacent to the Stillwater Mine shaft. The mill has a design capacity of 3,000 tons per day. During 2015, the company completed construction of the third and final permitted expansion of the Hertzler Tailings Facility allowing for tailings placement through approximately 2030 based on current operating parameters. East Boulder Mine The East Boulder Mine is located in Sweet Grass County, Montana, approximately 32 miles south of the town of Big Timber and is accessed by a public road. The East Boulder Mine is permitted independently of the Stillwater Mine and comprises a second distinct mining operation accessing the western portion of the J-M Reef. The mine consists of underground mine development and surface support facilities, including a concentrator, shop and warehouse, changing facilities, storage facilities, office and tailings management facility. All mine facilities are wholly-owned and operated by the compa
stillwater mining co (SWC*:Mexico)
26 West Dry Creek Circle
Littleton, CO 80120
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