Highland Copper is accelerating development of its flagship Copperwood Project in Michigan as the company works toward releasing an updated feasibility study in the first quarter of 2027. Backed by rising long-term copper prices, ongoing engineering improvements, and new processing technologies, the project is moving into a critical phase that could significantly enhance its economics and strengthen its position as one of the most advanced undeveloped copper projects in the United States.
As global demand for copper continues to surge due to electrification, renewable energy infrastructure, electric vehicles, and expanding power grids, projects capable of delivering domestic copper supply are becoming increasingly important. Highland Copper believes Copperwood could play a key role in supporting future US critical mineral supply chains while benefiting from favorable market conditions.
Copperwood Resource Base Remains Strong
The Copperwood Project currently hosts a substantial mineral resource consisting of 54.2 million tonnes of measured and indicated resources grading 1.51% copper. This resource base provides a solid foundation for future mine development and supports the company’s efforts to optimize production plans ahead of a construction decision.
As part of the updated feasibility work, Highland Copper is reassessing mine planning assumptions using a long-term copper price of approximately $4.80 per pound, significantly higher than assumptions used in previous studies.
Management is evaluating whether lower cut-off grades could economically expand the mineable resource inventory. Such an adjustment could unlock additional copper-bearing material and potentially increase the project’s overall production profile and mine life.
Potential Expansion Through Upper Copper Bearing Sequence
One of the most promising opportunities under review involves the Upper Copper Bearing Sequence (UCBS), a mineralized zone that currently sits outside the project’s reserve estimate.
The UCBS contains approximately 10.2 million tonnes grading 1.1% copper in the measured and indicated category. While not currently included in mine reserves, Highland Copper is examining whether emerging technologies and revised economic assumptions could make this material viable for future extraction.
The company is particularly focused on evaluating bulk ore sorting technologies, which have gained increasing attention across the mining industry for their ability to improve resource utilization and reduce processing costs. If successful, ore sorting could enable the inclusion of the UCBS in future mine plans, potentially increasing Copperwood’s production capacity while improving overall project economics.
Engineering Optimization Targets Improved Mine Design
Detailed geotechnical investigations are also underway as Highland Copper refines the project’s underground mining design.
Current studies are helping engineers optimize key parameters including mining heights, pillar dimensions, ground stability, and sources of dilution. Early findings suggest that dilution may originate primarily from the mineralized hanging wall rather than the mine floor, providing valuable information for future extraction strategies. These refinements are expected to improve resource recovery and support more efficient mining operations throughout the life of the project.
Metallurgical Improvements Boost Recovery Rates
Beyond mine design, Highland Copper is pursuing several processing enhancements aimed at maximizing copper recovery while reducing operating costs. Metallurgical testing completed in late 2025 evaluated an alternative mill-float-mill-float processing flowsheet, producing encouraging results.
According to the company, projected life-of-mine copper recovery could increase to approximately 87.6%, compared with 86% outlined in the 2023 feasibility study. While the increase may appear modest, even small improvements in recovery can translate into substantial additional metal production over the life of a large-scale mining operation.
The revised processing approach could also reduce secondary milling requirements, lower reagent consumption, and decrease overall energy usage—factors that would improve both project economics and environmental performance. The company notes that these projections remain based on laboratory testing and engineering assumptions and will require validation under actual operating conditions.
Tailings Innovations Could Lower Costs and Improve Sustainability
Environmental and operational efficiency considerations are also playing a major role in Copperwood’s development strategy. Recent test work conducted by Responsible Mining Solutions in Sudbury, Ontario, demonstrated that thickened tailings containing approximately 55% solids by mass can be produced for the project.
Highland Copper is now evaluating the integration of thickened tailings technology into the design of its tailings storage facility.
If implemented, the approach could reduce the footprint of the storage facility, lower initial construction costs, improve water recovery rates, and decrease long-term pumping requirements. These benefits align with broader mining industry trends focused on improving water management and reducing the environmental impact of tailings disposal.
Feasibility Update Supports Financing Strategy
The company’s ongoing technical work is not only intended to strengthen project economics but also to support future financing discussions. Highland Copper is targeting completion of approximately 40% of Front-End Engineering and Design (FEED) by the end of 2026. This milestone will provide the technical foundation necessary for detailed due diligence processes with potential lenders, investors, and strategic partners.
The updated feasibility study scheduled for early 2027 is expected to integrate all recent engineering, metallurgical, geotechnical, and processing improvements into a comprehensive development plan.
Strategic Importance for US Copper Supply
The Copperwood Project is advancing at a time when few large-scale copper projects are nearing production in the United States.
Growing demand from renewable energy systems, electric vehicles, battery infrastructure, data centers, and grid modernization projects is expected to place increasing pressure on domestic copper supply. Industry analysts continue to forecast long-term deficits as global consumption outpaces new mine development.
Against this backdrop, Copperwood represents a potentially important source of future US copper production.
Highland Copper CEO Barry O’Shea noted that the combination of stronger copper price forecasts, engineering enhancements, and resource optimization opportunities creates significant potential to improve the project’s value proposition.
With construction planning progressing and technical studies advancing, Copperwood is entering one of the most important stages in its development. If ongoing optimization efforts deliver the anticipated benefits, the Michigan project could emerge as a key contributor to North America’s future copper supply chain while supporting broader energy transition and critical mineral security objectives.
