The Williamson Diamond Mine (also known as the Mwadui mine) is a diamond mine 23 km northeast of Shinyanga in Tanzania; it became well known as the first significant diamond mine outside of South Africa.
 The mine was established in 1940 by Dr. John Williamson, a Canadian geologist, and has been continuous operation since then, making it one of the oldest continuously operating diamond mines in the world.
 Over its lifetime it has produced over 19 million carats (3,800 kg) of diamonds.
 The Williamson mine, once owned by its namesake Dr. Williamson and later nationalized by the government of Tanzania.
 Since February 2009 the mine is mostly owned by Petra Diamonds, with 75% ownership, the government of Tanzania owning the remaining 25%.
The Jaduguda Mine (also spelt as Jadugoda or Jadugora) is a uranium mine in Jaduguda village in the Purbi Singhbhum district of the Indian state of Jharkhand.
 It commenced operation in 1967 and was the first uranium mine in India.
 The deposits at this mine were discovered in 1951.
 As of March 2012 India only possesses two functional uranium mines, including this Jaduguda Mine.
 A new mine, Tummalapalle uranium mine is discovered and mining is going to start from it.
Kayelekera uranium mine is an open cast uranium mine 52 kilometers west of the regional administrative and commercial centre Karonga in Malawi, Africa and is the country's largest mine.
 Kayelekera is owned 100% by Paladin (Africa) Limited (PAL), an 85% subsidiary of Australian and Canadian listed Paladin Energy and in July 2009, Paladin issued 15% of the equity in Paladin (Africa) Ltd to the Government of Malawi under the terms of the Mining Development Agreement signed between PAL and the Government in February 2007.
 The mine was officially opened on 17 April 2009 by the then Malawian president Bingu wa Mutharika.
 As of 2014, the mine is in care and maintenance mode owing to a depressed uranium market.
 While in production, the mine exported containers of uranium oxide via the port of Walvis Bay.
 The mine has not been profitable for its operators and has met opposition from organisations and individuals concerned about the mine's tax concessions, operation, adherence to law and regulation and its potential impacts on human and environmental safety.
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.
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.
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.
The MAT/5 is an Italian circular, plastic-cased minimum metal blast resistant anti-tank blast mine.
 It uses a pneumatic fuze which is resistant to shock and blast, and is also claimed to be resistant to mine flails and mine rollers.
 The mine's plastic case is waterproof, and it can be laid in shallow water.
 Additionally the mine will function upside down.
 The mine can be fitted with anti-handling devices.
 The mine is no longer in production.
Drakelands Mine – formerly known as Hemerdon Mine, or the Hemerdon Ball or Hemerdon Bal Mine – is a tungsten and tin mine.
 It is located 7 mi northeast of Plymouth, near Plympton, in Devon, England.
 It lies to the north of the villages of Sparkwell and Hemerdon and adjacent to the large china clay pits near Lee Moor.
 The mine was out of operation since 1944, except for the brief operation of a trial mine in the 1980s, but work started to re-open it in 2014.
 It hosts the fourth largest tin-tungsten deposit in the world.
The Bingham Canyon Mine, more commonly known as Kennecott Copper Mine among locals, is an open-pit mining operation extracting a large porphyry copper deposit southwest of Salt Lake City, Utah, in the Oquirrh Mountains.
 The mine is the largest man-made excavation in the world and is considered to have produced more copper than any other mine in history – more than 19 million tonnes.
 The mine is owned by Rio Tinto Group, a British-Australian multinational corporation.
 The copper operations at Bingham Canyon Mine are managed through Kennecott Utah Copper Corporation which operates the mine, a concentrator plant, a smelter, and a refinery.
 The mine has been in production since 1906, and has resulted in the creation of a pit over 0.6 mi deep, 2.5 mi wide, and covering 1,900 acre .
 It was designated a National Historic Landmark in 1966 under the name Bingham Canyon Open Pit Copper Mine.
 The mine experienced a massive landslide in April 2013 and a smaller slide in September 2013.
Kittilä mine, also known as Suurikuusikko mine, is a gold mine in Kittilä, in the Lapland Province of Finland.
 The mine is owned and operated by Agnico-Eagle Mines Limited and is located 36 km north-east of Kittilä.
 Exploration began in 1986, and production started in 2008.
 The mine is composed of two open pits, with the proceeds of the operation funding an underground mining operation, accessed by a ramp from surface and utilizing both transverse and longitudinal long-hole stoping methods.
 The mine utilizes on-site concentrating to produce Doré bars for shipment off-site for refinement, and is scheduled to produce 150000 oz of gold in 2009.

Question: Which was in operation longer the Burwash Mine or the Hedley Mascot Mine?
Answer: The Hedley Mascot Mine