The primary purpose of such districts is to implement the mineral resource lands designation of the Comprehensive Plan, established pursuant to RCW 36.70A.170, by allowing the type of activity that encourages and supports the opportunity for the extraction of minerals in areas of Clallam County designated as containing resources viable for long-term commercial extraction. Such a district is also designed to discourage incompatible uses from locating upon those lands where mineral extraction, as defined in this code (or creation of a disturbed area as defined in State law of under three acres) occurs or can be anticipated.