Excelsior provides a PEA on a newer project.

"With its attractive economics and upside potential, the Strong and Harris deposit is a complementary asset that has the potential to allow Excelsior to become a larger and longer-term producer than previously envisioned.”

https://www.excelsiormining.com/news/news-2021/excelsior-mining-files-pea-technical-report-for-strong-harris-copper-zinc-silver-deposit-in-southern-arizona