Canada-based mining services specialist STRACON Group announced on 6 January 2026 that it has secured an integrated engineering, construction and long-term operations contract from Anglo American Sur to remove and re-engineer the Pérez Caldera Tailings Dam at the Los Bronces copper mine in Lo Barnechea, Chile. The project aims to adapt the facility’s water resources and ensure safe, sustainable waste management.
Awarded by Anglo American Sur, a 50.1 per cent subsidiary of London-listed Anglo American, the deal puts STRACON in charge of everything from detailed design and financing to construction, tailings removal, material transport, and decades-long operations and maintenance. The contract positions STRACON as the single point of accountability for one of the largest tailings-management upgrades currently planned in Chile’s copper sector.
The Pérez Caldera Tailings Dam Removal and Water Resource Adaptation Project received official environmental approval in April 2025, clearing the regulatory path for construction to begin the following year. Anglo American considers the programme a cornerstone of its broader effort to modernise waste storage across Los Bronces, one of the world’s highest-altitude open-pit copper mines.
Anglo American’s choice of STRACON, widely known for heavy civil works in Latin America, underlines the industry’s shift toward integrated service models that wrap engineering, procurement, construction, financing and O&M into a single package. It also reinforces Chile’s push to tighten environmental safeguards on legacy tailings facilities after high-profile dam failures elsewhere in South America.
Steve Dixon, chief executive of STRACON, called the win “a strong vote of confidence from a global major in our ability to engineer and execute complex infrastructure while maintaining the highest safety and environmental standards.” He said the company’s “integrated platform” allows mining clients to “move seamlessly from concept to long-term operation without handing the asset off to multiple contractors.”
Project scope and timeline
Under the multi-year agreement, STRACON Engineering will carry out geotechnical studies, design earthworks, and devise water-management systems needed to stabilise and then progressively dismantle the existing dam wall. Crews will condition billions of tonnes of stored tailings, remove the material in stages, and transport it via new slurry and pipe networks to alternative storage or reprocessing facilities within the Los Bronces complex.
STRACON will also design and build water-recovery circuits so that process water can be reused in the concentrator, reducing withdrawals from mountain aquifers near the mine’s 3,500-metre-altitude site. Once removal is complete, the company will be responsible for long-term monitoring, slope rehabilitation and vegetation programmes engineered to return the valley to a stable, post-mining state.
Neither company disclosed the contract’s dollar value or duration, but STRACON described it as a “long-life” agreement that will contribute steady, recurring revenue well beyond the initial construction phase. The financial element includes arranging or structuring capital so Anglo American can spread costs across the full life cycle of the asset, an increasingly common feature of integrated infrastructure deals as miners try to conserve balance-sheet capacity for new ore bodies.
Strategic backdrop
The Los Bronces overhaul comes amid heightened scrutiny of tailings dams around the world. Following the 2019 Brumadinho disaster in Brazil, regulatory bodies and investors demanded tighter design criteria and mandatory closure plans. Chile has since updated its Decree 248 standard, requiring companies to move older upstream dams to safer downstream or hybrid designs.
Anglo American and state-owned Codelco accelerated modernisation efforts in 2025 when they signed a binding agreement to coordinate operations at their neighbouring Los Bronces and Andina assets. That plan, announced four months before Pérez Caldera won environmental clearance, calls for shared water infrastructure and joint waste-handling corridors—suggesting that the remediated Pérez Caldera site could become a linchpin of regional tailings logistics once work is complete.
For STRACON, headquartered in Lima but incorporated in Canada, the deal widens a portfolio that already includes tailings and water-treatment projects for Vale in Brazil, Minsur in Peru and First Quantum in Panama. The company has spent the past four years positioning itself as a one-stop provider of “asset-life solutions,” betting that miners will outsource non-core but highly specialised functions such as dam deconstruction or pit dewatering.
Health, safety and environmental commitments
STRACON said it will apply its corporate safety management system, which aligns with ISO 45001 and the Global Industry Standard on Tailings Management (GISTM). The contractor will also deploy real-time dust suppression technology and seismic monitoring equipment to reduce community and worker exposure during material removal. Local hiring targets and Indigenous-business procurement plans are being finalised with the Lo Barnechea municipal government.
Environmental approval granted in April 2025 obliges Anglo American to restore native flora and maintain downstream water quality throughout demolition and material transport. Chile’s environment ministry will receive quarterly compliance audits, while a citizen-oversight committee drawn from nearby communities monitors progress on the ground.
How the contract fits Anglo American’s agenda
The miner’s shift toward integrated service contracts mirrors a strategic reset aimed at reducing capital intensity and shaving risk from non-core activities. By outsourcing a complex, multi-disciplinary task like tailings-dam removal to a turnkey contractor, Anglo American can redeploy in-house engineering teams to copper project expansions at Quellaveco in Peru and Collahuasi in northern Chile.
Los Bronces itself is undergoing a separate US$3.3 billion underground transition designed to access deeper ore bodies while shrinking the mine’s surface footprint. The Pérez Caldera clean-up is considered critical to unlocking those new reserves, because it will free up land and water capacity needed for future processing circuits.
Implementation challenges
At 3,500 metres above sea level, Los Bronces poses logistical hurdles—from harsh winters to limited oxygen affecting heavy machinery performance. STRACON says it will use modular, pre-assembled components and staggered material-handling shifts to keep equipment utilisation high despite weather constraints. Solar-powered remote monitoring stations will replace traditional diesel generators at the dam crest to reduce fuel haulage and emissions.
The project will also have to navigate Chile’s evolving permitting environment. Although Pérez Caldera won environmental clearance in 2025, each construction stage requires secondary approvals tied to water-usage rights and waste-transport corridors that overlap with protected Andean wetlands. STRACON’s regional project management office in Santiago will coordinate design changes with regulators to avoid delays.
Financial structuring
While specific numbers are confidential, industry analysts note that bundling financing into service contracts can lower overall cost of capital. Because the contractor assumes performance risk, lenders often view the structure as closer to a concession than a traditional EPC job, allowing longer repayment tenors. In practice, that can free up working capital for the mine operator while giving the contractor a stable annuity-style revenue stream linked to performance milestones.
Integrated financing is not new, but its use in tailings rehabilitation marks a shift in how mining companies fund environmental liabilities. Instead of booking a large closure provision up front, they can amortise remediation expenses over the contract term, smoothing earnings volatility.
Analysis: broader implications
The Pérez Caldera award signals two converging trends in global mining. First, mounting ESG pressure is turning tailings-dam removal from a compliance line item into a strategic, capital-intensive project on par with new mine development. Second, contractors capable of spanning engineering, construction, financing and operations are gaining market share, as owners divest non-core technical risk.
If STRACON delivers on schedule and budget, the project could become a template for similar legacy-dam removals across the Andes, where hundreds of ageing structures await upgrades to meet GISTM standards. For Chile, success would reinforce the country’s reputation as a mature jurisdiction capable of balancing environmental stewardship with copper-production growth, an increasingly critical equation as the energy transition drives demand for low-carbon metals.
Sources
- https://finance.yahoo.com/news/stracon-wins-integrated-services-contract-131829464.html
