Bisbee Mining & Historical Museum Mining was the world's main trade through the years until 1985, when the Homestake Mining Company closed down the Bulldog Mine. Admission to the Bon Ami Mine is $8.00 for adults, $7.00 for seniors over 60, and $6.00 for college kids. A 12-web page http://zaneuhscl.idblogz.com/7377270/chile-mining-accident