I have found this site with lots of old pictures of mines and quarries. Some structures in these mines are interesting for modeling.
http://libraryphoto.er.usgs.gov/mine.htm
Just select the mine that you want to see ("Edna mine" and "Edna coal mine" for the D&RGW fans) and enjoy!
http://libraryphoto.er.usgs.gov/mine.htm
Just select the mine that you want to see ("Edna mine" and "Edna coal mine" for the D&RGW fans) and enjoy!