AIBRIEF
The West Virginia University pilot at Mount Storm is demonstration scale, but it points to the real US rare earth gap: raw material supply, known in the industry as front end feedstock, with only one domestic mine operating.
At a retired coal mine in Mount Storm, West Virginia, ochre-colored acid mine drainage pools in a basin, gets piped to a small hillside plant, and emerges nearly turquoise. The color change signals an environmental cleanup. The byproduct is a concentrated rare-earth residue, and that is the part Mark Gavin, West Virginia University's vice-provost, frames as the real prize.
The US has one operating rare-earth mine — Mountain Pass in California — and it yields mostly light rare earths. Heavy rare earths, which are harder to mine and command higher prices for use in EV motors, wind turbines, and fighter jet electronics, are largely sourced from outside the US. China dominates both production and refining, a position Washington treats as a strategic vulnerability.
WVU researchers first identified rare earths in Appalachian mine drainage roughly a decade ago. The Mount Storm pilot, publicly financed and still demonstration-scale, treats AMD through three sequential pools and concentrates rare earths as a side stream. Lance Lin, who directs the WVU Rare Earth Elements Initiative, calls the design dual-purpose: clean water out, critical minerals out.
Gavin argues the binding constraint is front-end feedstock, not midstream refining or downstream magnet manufacturing. Mine-water recovery, if it scales, attacks the gap from a cost stream that already exists — the cleanup budget. The pilot does not replace Chinese supply. It tests whether the missing link can be sourced from the wastewater America is already treating.