American Silica, LLC 311 N. Broad Street Brooksville, FL 34601 Production Facility. American Silica, LLC 85 Lawrence County Road 205 P.O. Box 199 Black Rock, AR 72415 Phone 870-878-6601. East Cave City Quarry. American Silica, LLC 585 Cougar Road introducing silica sand into the air, which is a human health hazard. Additionally, community tensions and distrust often follow such a major industrial expansion. These photos depict frac sand mining and infrastructure in various locations around the US.