BHP halts Escondida, the world's largest copper mine, after a worker death, with copper near a record

BHP suspended all operations at Escondida in Chile's Atacama Desert on Wednesday after a worker was killed during maintenance work, Reuters reported. Escondida is the world's largest copper mine. "All operational activities at the mine have been suspended," BHP said in a statement, without saying when work could restart. The union at the site told Reuters the accident involved a front-end loader.

BHP operates the mine. Rio Tinto owns 30% and Japan's JECO Corp owns 12.5%. BHP had estimated Escondida would produce up to 1.28 million metric tons of copper this year, according to the Reuters report, which Investing.com also carried.

How long a halt costs

In Chile, a mine can generally restart after a fatal accident only once inspectors confirm conditions are safe, Reuters noted, so the length of the stoppage is not in BHP's hands alone. We can put a rough size on each day. Spread evenly over a year, 1.28 million tons is about 3,500 tons a day. At Tuesday's London price of $14,783 a ton, that is roughly $52 million of copper a day. The per-day figure is our calculation, and real output varies with ore grades and maintenance schedules.

A halt of a few days would barely register in annual numbers. A halt lasting weeks, on top of already thin inventories, would matter more.

Copper fell on the day, but not because of the mine

The obvious read is "mine shuts, copper jumps." That is not what happened on Wednesday. Copper fell about 1% to $6.69 a pound, according to Trading Economics, a day when the dollar and Treasury yields rose and gold and silver sold off. The Escondida news came in the afternoon, so most of the market's reaction is still ahead.

What made traders nervous before the accident was the supply picture. OilPrice reported that three-month copper on the London Metal Exchange settled Tuesday at $14,783 a ton, $92 below its Sept. 10 record, after six straight gains. Shanghai cathode stocks fell to 43,900 tons, the lowest since 2023, citing Shanghai Metals Market data. In London, 122,150 tons were booked for withdrawal, leaving 133,725 tons actually available. Most exchange copper, about 696,000 tons or roughly 69%, sits in U.S. Comex warehouses after a year of imports ahead of possible tariffs.

Who it hits

Copper is up about 41% from a year ago, based on Trading Economics' figures. That flows straight into the bills of electrical contractors, HVAC installers and plumbers, whose wire, line sets and pipe are priced off the metal. A contractor bidding a job now for materials bought next month is carrying price risk on copper. Supply-house quotes often hold only for a short window when the metal is moving, so a tight quote validity period is worth checking before a bid goes out.

For miners' shareholders, BHP and Rio Tinto carry the direct exposure through their stakes. Follow the metals on our markets board, and see our story on gold and silver falling as the dollar rose.

Sources: Reuters; Investing.com; OilPrice.com, citing Shanghai Metals Market and Bloomberg; Trading Economics. Per-day output and value estimates calculated by The Company Chronicle. This is market information, not investment advice.