The Sterling Hill Mining Museum Mining was the realm's primary trade by way of the years till 1985, when the Homestake Mining Company closed down the Bulldog Mine. Admission to the Bon Ami Mine is $eight.00 for adults, $7.00 for seniors over 60, and $6.00 for college students. A http://fernandoowbhl.dailyhitblog.com/8509459/common-mistakes-in-confined-space-monitoring