Question: What do Hedley Mascot Mine and Ruth Mine have in common?

full_context: Document 1: McIntyre Mines: The McIntyre mine is an abandoned underground gold mine in Schumacher, Ontario, Canada, which has earned a place in Canadian mining history as one of the nation's most important mines. Its iconic headframe, located near downtown Timmins, has come to represent the entire Porcupine Gold Rush. The McIntyre also yielded a considerable amount of copper over its life.
Document 2: Minto City: Minto City, often called just Minto, sometimes Minto Mines or Minto Mine, was a gold mining town in the Bridge River Valley of British Columbia from 1930 to 1936, located at the confluence of that river with Gun Creek, one of its larger tributaries. It was first called the Alpha group of claims in the 1920s, when underground miners were exploring the seams of Cadwallader Creek and the origins of the placer deposits downstream in the Bridge River. The mine prospect was never much successful although a model townsite was built by promoter "Big Bill" Davidson, who imported soil to build a specially-built rodeo ground and baseball diamond on the rocky site. The larger mine of Bralorne was nearby. The mine shut down in 1936 due to productivity issues, but restarted in 1940. The valley has since been significantly altered when most of the vestiges of the town were inundated by the waters of the Carpenter Lake reservoir following completion of the Bridge River Power Project. The town sat on the western end of the lake near the present Carpenter Lake Road (a section of BC Road 40), part of the road drove through a wooden Tudor arch built into the rock mill.
Document 3: Ruth Mine: The Ruth Mine was a small gold producer about 65 km (40 miles) east of Yellowknife, Northwest Territories. It operated briefly during 1942 and then again in 1959, extracting only 550 troy ounces (17 kg) of gold thus far. The old mine is today (2012) significant as one of the last intact abandoned mining properties from the 1940s period in the Northwest Territories, although the site was scheduled to be remediated by the federal government.
Document 4: Negus Mine: Negus Mine was a gold producer at Yellowknife, Northwest Territories, Canada, from 1939 to 1952. It produced 255,807 troy ounces (7956 kg) of gold from 490,808 tons of ore milled. The underground workings were acquired by adjacent Con Mine in 1953 and were used for ventilation purposes until Con Mine closed in 2003.
Document 5: Ptarmigan and Tom Mine: The Ptarmigan and Tom Mine were gold producers located in the Northwest Territories, Canada at Yellowknife. The property was staked by prospectors in 1936 and acquired by Cominco in 1938. The mine first produced between 1941 and 1942 but closed due to wartime restrictions. The old property was demolished in 1969–1970. A new company, Treminco Resources Limited, reopened the workings in 1985 and production from the Tom ( ) portal began in 1986 with material being trucked to Giant Mine. The old Ptarmigan ( ) mine shaft was dewatered and production began in 1987. A new mill was built at the property and was operational in July 1989. Low gold prices forced the company to close the mines in 1997. Total gold production has been approximately 120,000 troy ounces (3700 kg).
Document 6: Ferris-Haggarty Mine Site: The Ferris-Haggerty Mine Site was one of the richest components of the Grand Encampment Mining District in Carbon County, Wyoming. The site was first exploited by Ed Haggerty, a prospector from Whitehaven, England, in 1897 when he established the Rudefeha Mine on a rich deposit of copper ore. Haggerty was backed by George Ferris and other investors, of whom all but Ferris dropped out. The partners sold an interest to Willis George Emerson, who raised investment funding for improvements to the mine. These facilities included a 16 mi aerial tramway from Grand Encampment over the Continental Divide to the in Encampment. The mine's assets were eventually acquired by the North American Copper Company for $1 million. By 1904 the mine had produced $1.4 million in copper ore, and was sold to the Penn-Wyoming Copper Company. However, even with copper prices peaking in 1907, the company had difficulty making a profit from the remote mine site. The company was over-capitalized and under-insured and was suffered devastating fires at the mine site in March 1906 and May 1907 which halted production. Business disputes and a fall in copper prices prevented re-opening of the mine even after it was rebuilt. Machinery was salvaged after a foreclosure in 1913. A total of $2 million in copper ore was extracted from the mine during its life.
Document 7: Kemess Mine: The Kemess Mine was an open-pit copper and gold mine, located just northeast of the foot of Thutade Lake, at the head of the Finlay River, in the Omineca Mountains of the Northern Interior of British Columbia, Canada. It was operated by Royal Oak Mines from 1998 to 1999, when it was bought by Northgate Minerals. Northgate operated the mine until its closure in 2011; that year Northgate was taken over by AuRico Gold. In 2014 AuRico Gold partitioned off its portion of kemess Mine ownership creating a new company called AuRico Metals. AuRico Metals is actively implementing permits for a block caving mine.
Document 8: Thompson-Lundmark Mine: The Thompson-Lundmark Mine was a gold producer in the periods 1941–1943 and 1947–1949, near Yellowknife, Northwest Territories. Gold was discovered here in 1938 by Fred W. Thompson and Roy Lundmark; they staked 46 claims that were incorporated into the mine. Underground and shaft work began in 1939. The mine processed 133,989 tons of ore to produce 70,339 troy ounces (2188 kg) of gold and 13,782 troy ounces (429 kg) of silver. The abandoned site was destroyed by forest fires during 1998. A detailed history is available in the link below.
Document 9: Beaulieu Mine: The Beaulieu Mine was a post-World War II gold mining operation near Yellowknife, Northwest Territories. It entered production in October 1947, but by the end of November only 7 troy ounces (220 g) of rough gold were recovered. Additional gold was recovered during 1948, but altogether the mine recovered only 30 troy ounces (930 g) of fine gold. The operation folded in chaos and bankruptcy.
Document 10: Hedley Mascot Mine: The Hedley Mascot Mine was a gold mine in Hedley, British Columbia, Canada. Gold was first discovered in the Nickel Plate Mountain area in 1897 and several small mines were developed over the years. The Hedley Mascot Mine operated between 1936 and 1949 and was one of the most unusual mining operations in the world, being built entirely on the side of a mountain, 5,000 feet above the town of Hedley or seven thousand feet above sea level. In the 1990s, the British Columbia government was going to burn the site down because it posed a safety risk, but the Minister of Tourism at the time intervened and, in 1995, steps were taken to preserve the site as a Provincial Heritage resource.
Document 11: Burwash Mine: The Burwash Mine was a small gold property discovered in the fall of 1934 by Johnny Baker and Hugh Muir at Yellowknife Bay, Northwest Territories. The town of Yellowknife did not exist yet at that point, but the discovery of gold at Burwash was the catalyst that brought more gold prospectors into the region in 1935 and 1936. A short shaft was sunk in 1935-1936 at Burwash, and in the summer of 1935 a 16-ton bulk sample of ore was shipped to Trail, British Columbia for processing, yielding 200 troy ounces (6 kg) of gold. The mine did not become a substantial producer and it is believed the gold vein was mined out.
Document 12: Hedley, British Columbia: Hedley is an unincorporated town in southern British Columbia, Canada, named after Robert R. Hedley, the manager of the Hall Smelter in Nelson. Hedley is located at the foot of Nickel Plate Mountain in the Similkameen. The town had a population of approximately 400 as of 2005. In the early 1900s, Hedley's population peaked over 1,000 people, primarily due to the gold mining industry. The Hedley Museum and the Mascot Mine Museum display artifacts and photographs from this era.
Document 13: Salmita Mine: The Salmita Mine was a gold producer in the Northwest Territories, Canada during 1983 to 1987. The deposit was first discovered in 1945 and underground exploration was carried out in 1951-1952. It was reactivated for exploration by Giant Yellowknife Mines Limited in 1975 and entered production in 1983. They used the old camp and milling plant of the abandoned Tundra Mine, located a few kilometres to the south. The mine produced 179,906 troy ounces (5596 kg) of gold from the milling of 238,177 tons of ore.
Document 14: Ptarmigan and Tom Mine: The Ptarmigan and Tom Mine were gold producers located in the Northwest Territories, Canada at Yellowknife. The property was staked by prospectors in 1936 and acquired by Cominco in 1938. The mine first produced between 1941 and 1942 but closed due to wartime restrictions. The old property was demolished in 1969–1970. A new company, Treminco Resources Limited, reopened the workings in 1985 and production from the Tom ( ) portal began in 1986 with material being trucked to Giant Mine. The old Ptarmigan ( ) mine shaft was dewatered and production began in 1987. A new mill was built at the property and was operational in July 1989. Low gold prices forced the company to close the mines in 1997. Total gold production has been approximately 120,000 troy ounces (3700 kg).
Document 15: Iron Mountain Mine: Iron Mountain Mine, also known as the Richmond Mine at Iron Mountain, is a mine near Redding in Northern California, US. Geologically classified as a "massive sulfide ore deposit", the site was mined for iron, silver, gold, copper, zinc and pyrite intermittently from the 1860s until 1963. The mine is the source of extremely acidic mine drainage which also contains large amounts of zinc, copper and cadmium. One of America's most toxic waste sites, it has been listed as a federal Superfund site since 1983.
ground_truth: gold mine