Decided to answer my own question - here's a great history of the NW aluminum industry: https://www.nwcouncil.org/reports/columbia-river-history/aluminum https

Decided to answer my own question - here's a great history of the NW aluminum industry: https://www.nwcouncil.org/reports/columbia-river-history/aluminum https://www.nwcouncil.org/reports/columbia-river-history/alu... The last active NW aluminum smelters closed in 2016. Most of the rest were victims of Enron and the 2000 energy crisis.