Oops: “On July 10, 2017, MP Mine Operations LLC, a Chinese-led consortium including rare earths miner Shenghe Resources, purchased the Mountain Pass mine out of bankruptcy.” Well, so much for reactivating it by Americans; the Chinese are reactivating the mine in California for their purposes.
https://en.wikipedia.org/wiki/Mountain_Pass_rare_earth_mine
The tungsten mine I knew of was west of Mt. Tom in the Sierras. Around 1985 backpacking nearby we could hear the blast warning and then the actual blast. Cool stuff!