Gold Fields has lodged a $107.7-million reclamation bond with Ghana’s Environmental Protection Authority (EPA) for its Tarkwa mine, slightly exceeding the company’s $107.2-million estimate of the full cost of restoring the site once mining ends.

The disclosure comes as the South African miner awaits a government decision on renewing five mining leases that expire in April 2027.

The bond is a financial guarantee that the state can draw on to rehabilitate mined land if the operator fails to meet its environmental obligations. Ghanaian regulations require mining companies to post reclamation bonds, with terms set in a Reclamation Security Agreement with the EPA.

The current bond comprises a cash deposit of $45.7 million and a bank guarantee of $36.8 million posted with Absa Bank Ghana, updated to equal the total liability estimate at the end of December 2025.

The bond’s scale reflects how much Tarkwa’s closure costs have grown. A 2010 filing with the US Securities and Exchange Commission reported that Gold Fields’ Ghana bond secured $7.4 million, half of the rehabilitation costs estimated as of December 2005. The current figure is more than 14 times that amount.

Gold Fields said it has invested approximately $46 million since 2016 in rehabilitating land affected by mining, with annual spending averaging $4.2 million. More than 818,000 trees have been planted since 1998 on old rock dumps and waste areas, and some restored land is now used for crops including rubber, oil palm, cashew and citrus.

The company said the Tarkwa mine recycles and reuses more than 97% of the water used in its operations through treatment and recirculation systems, reducing the need to discharge water into nearby rivers and streams.

Camera traps used by conservation teams have recorded species including the tree pangolin, Mona monkey, Bosman’s potto and royal antelope in rehabilitated areas, which the company said provides evidence of wildlife using restored land. The company has also maintained international safety and environmental certifications for more than two decades. None of these figures has been independently verified.

The bond disclosure comes at a sensitive time. Gold Fields applied in November 2025 to renew five of its six mining leases and followed up in July 2026 with a renewal proposal to the government. The government has said it remains committed to renewing the leases but has ruled out an automatic extension. Isaac Andrews Tandoh, Chief Executive of the Minerals Commission, said it would not be “business as usual”.

The company said in August 2026 that it was yet to receive formal responses to its renewal application, adding that “there remains uncertainty as to the timing… and terms of any negotiated agreement to renew the Tarkwa leases”. Gold Fields is seeking a 20-year extension. The Institute of Economic Affairs has opposed the renewal, arguing that Ghana should own and control the mines while allowing foreign participation through service contracts.

Host communities are divided over the renewal. On 24 July 2026, a section of the Apinto Divisional Council urged the government to hand the concession to a Ghanaian-owned company, arguing that host communities had not benefited enough from mining. Chiefs and residents of Huniso, which supporters say hosts more than 70% of the mine, have appealed for the leases to be renewed.

The debate follows the government’s refusal in April 2025 to renew Gold Fields’ lease for its smaller Damang mine. The state took operational control of that mine, which was later awarded to local contractor Engineers & Planners.

Tarkwa produced about 427,000 ounces of gold in 2025. The mine operates under leases covering a total area of 19,866 hectares. The Tereberie lease, which ish separate from the five leases expiring in 2027, runs until 2043. Gold Fields Ghana is 90% held by Gold Fields Limited, with the remaining 10% held by the Government of Ghana.

The reclamation bond provides a financial mechanism for meeting the estimated cost of restoring the site, while the ongoing rehabilitation programme addresses areas affected by mining before the eventual closure of the operation. For now, the mine’s clean-up liability — and who carries it — remains part of the wider question of who will run Tarkwa after 2027.