My father worked for the St Joe Lead company in MO, a sister to Doe Run, his mine was shut down in 1978. He was a drafting engineer for them. His brother was a accountant for Doe Run for many years and retired from them. His other brother was a manager for Doe Run as well. We have a long family history with them. Our family settled in the area of MO from Germany in the 1850s. My great great grandfather who came over, provided horses and blankets for southern troops in MO.
These mines and smelters have been closing and opening for years. Here is a good article from 2010 when this closing was announced.
And this article. So you can see this has been off and on for years. They will find a way to continue. They always have.