43 CFR § 3832.34 - How may I use my mill site? | CFR | US ...
(a) Upon obtaining authorization under the surface management regulations of the surface managing agency, you may use and occupy dependent mill sites for: (1) Placement of grinding, crushing, or milling facilities (such as rod and ball mills, cone crushers, and floatation cells) and reduction facilities (such as smelting, electro-winning, roasters, autoclaves, and leachate recovery);