The Chinese translation is being made; the original is shown for now.
Every tonne of copper and rare earth in America’s aging infrastructure has already been mined once. Someone found it, dug it out and refined it at great expense, then built it into equipment we’ve leaned on for twenty or thirty years. That equipment is now coming out of service, on schedules set years in advance — but almost none of the metal inside it is being counted, let alone kept.
At GridMine, we have characterized this material as a reserve and see it as possibly America’s most promising mine. Judged on the terms the mining industry uses for any deposit, it holds up well.
Grade is the obvious place to start. Most copper ore mined today runs well under 1%, which means moving at least a couple hundred tonnes of rock for every tonne of metal. Chile, the world’s largest copper producer, averages 0.62% copper in its ore. A retired telephone cable is about 50% copper by weight, and even a substation transformer, which is mostly steel core and oil, runs around 13%. That puts retiring telecom equipment at twenty to eighty times the grade of Chilean ore.
A rare-earth magnet, meanwhile, is nearly a third rare earth by weight. At Mountain Pass in California — America’s only operating rare-earth mine, and one of the richest in the world — the ore averages about 6% rare-earth oxide, and only a sixth of that is the neodymium and praseodymium magnets actually need. On that measure a retired magnet is more than thirty times richer than the best ore in the country.
Speed matters too. A new US mine takes decades to get from discovery to production, whereas retiring equipment leaves service on dates its owners often already know, with the lead time a processor needs to plan around it. And all of it is domestic, meaning no import exposure.
Finally, it’s cheaper than free, frequently owned by someone who currently pays to have it hauled away.
We’re losing it
By most estimates, less than 1% of rare earths are recycled at all. More than half of US copper scrap is exported every year, historically with China as the biggest buyer.
Retired equipment shows up at a scrapyard gate by the truckload, gets sold one lot at a time to whoever is nearest, and drops out of the market’s view (and often out of the country) before anyone can plan around it. Meanwhile, new domestic magnet plants and smelters are being financed that will need exactly this feed, and they have no way yet to see where it will come from.
What we’re doing about it
A mine starts with exploration – finding and classifying before capital commits. We point those same methods at metal that’s already above ground.
GridMine maps our above-ground supply asset by asset — telecom network equipment, telecom copper cable, grid equipment, gas turbines, retiring power and industrial plants, solar fleets, vehicle batteries, rare-earth magnets, coal ash, and the gallium, germanium and scandium in industrial residues. For each asset we estimate recoverable tonnes and metal mix, who holds it and the year it becomes available.
Consider magnets. On our central estimate, about 1,300 tonnes of magnet alloy comes free in the US each year, mostly from hybrid and EV motors and data-centre drives. That climbs to around 2,300 tonnes a year by the early 2030s as the 2020s vehicle fleet ages out, or a mid-range estimate of 18,000 tonnes over the decade. These estimates can inform whether the magnet-recycling capacity being financed now is sized to what we’ll need.
A resource statement still falls short of a reserve, though — mining’s definition also needs someone holding the right to extract. We’ve built a map that is detailed enough that we know where to find these critical minerals and materials and can option them ahead of time; and we’ve built a neutral venue holding these rights in order to transfer them as a forward contract from owners of retiring assets to the processors who need them.
Why it’s worth the trouble
Geopolitics first, since it’s the most urgent. China controls roughly nine-tenths of the world’s rare-earth separation and magnet production and has shown it will use that leverage. A magnet pulled from a retired American motor is non-Chinese supply by definition, and it doesn’t take much to matter. When China paused magnet exports in the spring of 2025, Ford had to idle its Explorer plant in Chicago for a week. Set against that, the 1,300 or so tonnes a year coming free here is about what MP’s new Fort Worth magnet plant was built to make.
The environmental case is simple. Recycled copper takes a fraction of the energy of new copper (up to 85% less, by the industry’s own figures), and every recovered tonne is one that doesn’t need a new pit or tailings dam. For rare earths, it also skips the acidic, often radioactive residue that separation leaves behind at the source.
Human rights deserves more than a nod, too. A lot of critical-mineral supply comes from places where we can’t know how it was dug — consider cobalt from artisanal mines in the DRC where child labour is well documented, or heavy rare earths from unregulated mines in Myanmar’s Kachin State that have poisoned rivers and enriched armed groups. Recovered metal, by contrast, comes with a documented provenance, in a regulated jurisdiction, retired under US labor laws.
What it isn’t
None of this replaces primary supply. Recovering a battery won’t close a cobalt pit, and the world is going to need both. What above-ground supply can do is take pressure off the ground. It arrives inside the window where new mines are still stuck in permitting, already refined and already here.
The test this readership should apply when considering the value of above-ground mining is the one it applies to any resource claim: the classification and the confidence behind it, the cost and speed to extract, and the right to do so.
GridMine has the map and the exchange for these materials, and we welcome you to it.
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