Record #00467Technology archive
Mponeng gold mine in South Africa, operated by Harmony Gold, has developed underground workings reaching 3,841 m below surface according to its 2026 reporting, and is described by the operator as the world's deepest mine.
Current Record
3,841m
Current record value
Mponeng is in the West Wits goldfield southwest of Johannesburg near the border of Gauteng and North West provinces, owned and operated by Harmony Gold.
Harmony's fiscal-2026 disclosure reports mining at roughly 3,160–3,740 m below surface, whereas development reaches 3,841 m. The working depth and deepest developed level represent different measures. Deep mining also demands ventilation, refrigeration and careful ground control.
The record conclusion has sufficient verification support.
Basis: direct confirmation by an authority
Harmony Gold's 2026 annual filing calls Mponeng the world's deepest mine, with development at 3,841 m below mine datum and mining at 3,160–3,740 m. The mine's WGS84 representative coordinates were converted from the filing's 26°26′15.60″S, 27°25′41.24″E.
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