I'll be honest, a community google sheets could be used to determine contents of each file. I'd rather have a unorganized wealth of knowledge over potentially losing access to all of it.
I apologize, I wrote that before reading everything and thought I updated my original post. It was a document for the Bethlehem Steel Sheet Pile, the link no longer appears to work on the archive link. It's saved me a few times identifying sections down in Baltimore Harbor in the past. Thanks...
Sliderulera, would you be able to post a zip file of the contents of your website? Some of the documents I would frequent your site for are not on the backup site.