Well it looks like the future of USA now hinges on the lead zone.
USA complex has small shafts ... period. As it is now, USA is required to disassemble equipment (making it smaller to fit in the skip) in order to get it to the intended location ... and that is small equipment. So usa will never produce much ore using the existing shafts.
If usa sinks a new shaft to the lead zone ??? Then they will be able to produce a lot of silver.
Sinking a new shaft could cost 400 to 500 million dollars. And they won't sink the shaft until the lead zone will pay for it or even profit from it.
Hecla produces more silver because of the large shafts. It's like digging a hole with a shovel or a backhoe .... who's gonna produce more ore??
No LEAD ZONE = DEAD ZONE