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On 13 March 1888 the leaders of the various mines decided to amalgamate the separate diggings into one mine under De Beers Consolidated Mines Limited, with life governors such as Cecil John Rhodes, Alfred Beit, and Barney Barnato. This huge company further worked on the Big Hole until it came to the depth of 215 metres, with a surface area of ...
Research by historian Steve Lunderstedt in 2005 confirmed that the mine was the biggest hand-excavated hole in the world at 19.65 hectares (48.6 acres), slightly larger than the Big Hole of 17 ha (42 acres) in Kimberley, which had claimed the title up to then. It is probably not the deepest, though, since the final depth of the Big Hole reached ...
The Big Hole – a former diamond mine in Kimberley, dug to 240 m (790 ft) between 1871 and 1914, making it the deepest hand-excavated pit in the world. Now a museum. The Jagersfontein Mine – operating between 1888 and 1971. This was hand-excavated to 201 m (660 ft) by 1911, and the hand-dug pit was sightly larger than the Big Hole.
The Big Hole is the principal feature of a May 2004 submission which placed "Kimberley Mines and associated early industries" on UNESCO's World Heritage Tentative Lists. [ 12 ] [ 13 ] By 1873, Kimberley was the second largest town in South Africa, having an approximate population of 40,000.
The Kola Superdeep Borehole SG-3 (Russian: Кольская сверхглубокая скважина СГ-3, romanized: Kol'skaya sverkhglubokaya skvazhina SG-3) is the deepest human-made hole on Earth (since 1979), which attained maximum true vertical depth of 12,262 metres (40,230 ft; 7.619 mi) in 1989. [1]
The underground Berkeley Mine was located on a prominent vein extending to the southeast from the main Anaconda vein system (sometimes called "the richest hill on earth" [7]). When open pit mining operations began in July 1955, near the Berkeley Mine shaft, the older mine gave its name to the pit. The open-pit style of mining superseded ...
The Big Hole, Kimberley. The Mineral Revolution began with the discovery of diamonds at the town of Kimberley in 1867. The discovery of diamonds led to a rush of prospectors descending on the town, whose population skyrocketed as increasing numbers of prospectors arrived to seek their fortune.
The Homestake Mine was a deep underground gold mine (8,000 feet or 2,438 m) located in Lead, South Dakota. Until it closed in 2002 it was the largest and deepest gold mine in the Western Hemisphere . The mine produced more than forty million troy ounces (43,900,000 oz; 1,240,000 kg) of gold during its lifetime. [1]