Although a bit sporadic, the official 'progress' update page is here:
https://www.nashvillesteam.org/category/progress-report/
If you need more specific information, I'd contact the Nashville Steam Preservation Society directly:
https://www.nashvillesteam.org/contact/
I've been remiss in volunteering and can't give you a firsthand account.
What's the latest info on the NC&StL #576?
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