In late July 2026, Sishen Iron Ore Company (SIOC), a Kumba Iron Ore subsidiary, and Envusa Energy, a joint venture between Anglo American and EDF Power Solutions, reached financial close on the Sishen Solar PV project: a 72.5 MWp direct current (63 MW alternating current) solar facility to be built on approximately 100 hectares of rehabilitated mining land atop the G80 waste rock dump within the Sishen mine boundary in the Northern Cape. Envusa describes it as South Africa’s first embedded solar project built on a rehabilitated waste rock dump within an operating mine. First power is expected in the fourth quarter of 2027, with the plant projected to generate roughly 150 GWh a year and displace about 140,000 tonnes of carbon dioxide annually, some 35% of Sishen’s current Scope 2 emissions.

The project is a genuinely useful model: it converts a long-term environmental liability, a 20-storey-high engineered waste rock landform, into productive, income-generating infrastructure, without competing with surrounding communities for agricultural or residential land. But the model also sits squarely at the intersection of several distinct regulatory regimes, mine closure and rehabilitation law, environmental authorisation for new infrastructure, geotechnical risk management, and electricity regulation, each of which needs to be carefully reconciled for the approach to be replicated safely elsewhere.

The Project

The Sishen Solar PV facility will use fixed-tilt PV mounting structures fitted with adjustable legs, together with a mobile adjustable substation, specifically engineered to accommodate continuing settlement of the waste rock dump beneath it. Envusa Energy CEO Nicole Mason described the challenge as requiring “innovative engineering solutions to address complex geotechnical conditions“, with the adjustable design allowing “precise modifications, ensuring optimal alignment and stability even as the dump settles or shifts over time“.

The project follows Envusa’s earlier 520 MW Koruson 2 renewable energy cluster in the Eastern and Northern Cape and forms part of Kumba’s “Healthy Environment” strategic pillar, supporting Anglo American’s 2030 climate target and Kumba’s ambition to reduce greenhouse gas emissions by 28% by 2030. The SIOC Community Development Trust will hold a 10% interest in the project, and Kumba states the development has been designed to avoid competing with host communities for land, since it is built entirely on already-disturbed mining land rather than undeveloped ecosystems.

Key Environmental And Licensing Considerations

Repurposing a rehabilitated waste rock dump as permanent energy infrastructure raises considerations that go beyond the engineering challenge Envusa has solved for –

• “Rehabilitated” is not the same as “closed”: a dump may be substantially rehabilitated, vegetated, contoured and stable, without the mining right holder having yet obtained a closure certificate under section 43 of the Mineral and Petroleum Resources Development Act 28 of 2002 (MPRDA), which requires the Minister to be satisfied that all prescribed closure requirements have been met before liability for a site is formally discharged. Building permanent, income-generating infrastructure on a rehabilitated but not yet closed site needs to be reconciled with the site’s approved environmental management programme (EMPr) and its ultimate final land use plan, not simply its interim rehabilitated state;
• A facility of this scale requires its own environmental authorisation: a 100 hectare, 72.5 MWp solar facility is likely to trigger listed activities under the National Environmental Management Act 107 of 1998 (NEMA) EIA Regulations in its own right, independent of the mine’s existing EMPr. Locating a project on already-disturbed land can materially assist an environmental impact assessment, but it does not remove the need for a distinct, or amended, environmental authorisation covering the new infrastructure and its own impacts;
• Dump stability remains a live, ongoing environmental risk: waste rock dumps continue to settle for years after rehabilitation is substantially complete, which is precisely why the project required adjustable-leg racking and a mobile substation. That same ongoing settlement is a geotechnical and environmental risk in its own right, implicating slope stability, erosion control and stormwater management obligations that continue under the mine’s existing water use licence and EMPr, and that require continued monitoring independent of, and in addition to, the new project’s own environmental management measures;
• Financial provisioning and end land use should be formally updated: NEMA’s financial provisioning regulations tie the costing of rehabilitation and closure to an agreed final land use for a site. Converting a dump into permanent, income-generating infrastructure is a material change to that end state, one that should be reflected formally in the approved closure and financial provisioning plan, so that rehabilitation liability is clearly and correctly allocated as between the mining right holder and the energy project, both now and if either asset changes hands in future; and
• Electricity regulation runs as a parallel, distinct authorisation track: the solar facility requires its own registration or licensing under the Electricity Regulation Act 4 of 2006 with the National Energy Regulator of South Africa, together with grid connection and wheeling arrangements with Eskom, running alongside, and legally separate from, the MPRDA, NEMA and National Water Act 36 of 1998 authorisations already governing the underlying mining operation on the same footprint.

Practical Lessons For Other Mines

As other mining companies look to replicate the Sishen model on their own rehabilitated dumps and tailings facilities, several practical steps are worth building into project planning from the outset –

• auditing EMPr and closure plans across dormant or rehabilitated dumps and tailings storage facilities to identify repurposing potential, and the specific regulatory steps needed to formalise a change in approved end land use;
• engaging the Department of Mineral Resources and Energy and the Department of Forestry, Fisheries and the Environment early on how a change of land use interacts with existing closure and financial provisioning approvals, rather than assuming that rehabilitation sign-off alone is sufficient authority for permanent redevelopment;
• commissioning updated geotechnical and settlement studies for any dump or facility earmarked for permanent infrastructure, and embedding ongoing monitoring and reporting obligations in both the mine’s EMPr and the new project’s own environmental management programme;
• structuring surface use and ownership arrangements, whether by lease, servitude or joint venture, to clearly allocate ongoing rehabilitation and closure liability between the mining right holder and the energy project company; and
• treating NERSA registration or licensing and Eskom grid and wheeling agreements as a parallel workstream running alongside environmental authorisation from the outset, rather than a sequential step addressed only once the environmental process is complete.

Conclusion

The Sishen Solar PV project is a genuinely constructive answer to one of the mining sector’s most persistent environmental legacy problems: what to do with the land a mine leaves behind. Converting a long-term rehabilitation liability into an actively monitored, productive, income-generating asset is a materially better outcome than the alternative all too often seen in South Africa, rehabilitated or partially rehabilitated sites left dormant and, in the worst cases, becoming the derelict, unsecured workings exploited by illegal miners. That contrast is instructive: sites that remain actively used, monitored and financially accounted for are far less likely to become the environmental and safety hazards that abandoned mine land so often does.

Replicating the Sishen model safely, however, requires as much attention to the underlying environmental licensing architecture, closure and financial provisioning alignment, a distinct environmental authorisation for the new infrastructure, ongoing geotechnical monitoring, and the electricity regulatory overlay, as to the innovative engineering that makes building on a settling waste rock dump possible in the first place.

How Lexeco Can Assist

LexEco advises mining companies and renewable energy developers on the environmental and licensing dimensions of repurposing mine land for renewable energy and other post-mining land uses, including:

• amending EMPrs and closure plans to formally reflect a change in approved end land use for rehabilitated dumps, tailings facilities and other mine infrastructure;
• securing environmental authorisation under NEMA for on-site renewable energy facilities, including coordinating the assessment with an existing mine EMPr where relevant;
• reviewing and updating financial provisioning for rehabilitation and closure to reflect a revised end land use and the allocation of ongoing liability between mining right holders and energy project companies;
• structuring surface use arrangements, leases, servitudes and joint ventures between mining right holders and renewable energy developers operating on the same site; and
• coordinating MPRDA, NEMA, National Water Act and Electricity Regulation Act authorisation tracks for embedded generation projects developed on operating or rehabilitated mine land.

As more South African mines look to their rehabilitated land as a source of renewable energy value rather than residual liability, getting the underlying licensing architecture right at the outset will determine whether these projects proceed smoothly or become mired in avoidable regulatory disputes. Contact LexEco to discuss your mine rehabilitation, closure and renewable energy licensing position.