Kolar Gold Fields (KGF) is a mining region and taluk, in the Kolar District of Karnataka state, India.
Robertsonpet is the headquarters of Kolar Gold Fields. It includes the township of the same name, viz. KGF, where reside mainly the families of the employees of Bharat Gold Mines Limited (BGML) and BEML (formerly Bharat Earth Movers Limited). KGF is about 30 kilometers from Kolar and 100 kilometers from Bangalore. To the east of KGF is a ridge of hills of which Dod Betta Hill is 3195 feet above sea level. The town was known for gold mining for over a century, which was eventually closed in 2001 due to low level of gold production.
The tradition of mining gold at Kolar started at least as early as the first millennium BC with linkages to the Indus Valley civilisation. Golden objects found in Harappa and Mohenjo-daro have been traced to KGF through an impurities-analysis assay, as the impurities include 11% silver concentration, found only in KGF ore.
The Champion reef at the Kolar gold fields was mined to a depth of 50 meters during the Gupta period in the fifth century A.D. Subsequently, the metal continued to be mined during the Chola period in the 9th and 10th century AD, the Vijayanagara Empire from 1336 to 1565, and later by Tipu Sultan, the leader of Mysore state. The scale of the operations grew at each stage by the digging of small to large pits.
In July 2010, the Supreme Court approved the central government’s plan to float global tenders to revive the gold mines, 12 years after they were closed down. The court recorded a 2006 cabinet decision to invite bids to run the mines, and to take appropriate subsequent steps. Within 2014 they have to re-open mining, with selected mining units. As of 2016, the global tenders have not been floated. (wikipedia)