Base metals miner Taseko Mines has released an updated technical report for its Yellowhead copper project in British Columbia, highlighting the long-term value creation that it has managed since acquiring the asset in 2019.

The revised mine plan incorporates higher copper prices and an optimised development approach.

The company says the updated base case economics reflect a C$1.1-billion after-tax net present value (NPV) using a long-term copper price of $3.75/lb. At spot prices above $4.50/lb, the NPV exceeds C$2-billion.

Capital costs for initial development are estimated at about C$1.3-billion.

“We believe the Yellowhead project has the potential to become one of the largest long-life copper mines in Canada and will play a key role in the North American copper supply chain as global demand for copper continues to accelerate,” said CEO Stuart McDonald.

Yellowhead’s updated plan includes average production of 200-million pounds a year of copper over the first five years of operation, with a mine life of 32 years. The project is now advancing through the environmental assessment (EA) process in British Columbia, with a harmonised provincial-federal review under way.

Since acquiring Yellowhead in 2019, Taseko has completed extensive engineering, environmental, and community engagement work, as well as a new feasibility study to enhance project economics and reduce risk. The new plan includes a larger pit shell and streamlined construction strategy to reduce upfront capital intensity.

“When we acquired Yellowhead in 2019, we saw the potential to add significant value through mine planning and engineering, permitting and First Nations engagement. Over the past five years, we have made substantial progress in all of these areas, while also capitalising on a stronger copper price environment. This updated technical report confirms that we have enhanced the value of the project significantly,” McDonald said.

Yellowhead is located 150 km north-east of Kamloops, within the Simpcw First Nation’s traditional territory. Taseko has said it is committed to long-term partnerships with Indigenous communities, and engagement with Simpcw First Nation has been ongoing since the acquisition.

The company is targeting a construction decision after EA approval and permitting, expected in the second half of this decade.