>>/46003/ The Hazel Atlas mine was there.  Hazel atlas was a Huge glass producer. I have a set of their salt and pepper shakers.  Anywhoo this isn't just a little crawlspace mine. 
https://hanfordsentinel.com/features/visit-the-hazel-atlas-mine/collection_e60245a3-156f-55a8-b383-f79e56c143b6.html#2