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All non-metallic mining including Frac sand mining, requires a county Special Exemption Permit for mining within all unincorporated areas of the county. This is referenced under Chapter 14 Non-Metallic Mining (PDF).
The application submittal deadline is the first Monday of the month.
A non-metallic mining supplemental information sheet (PDF) is helpful in filling out the permit application.
The application is heard by the St. Croix County Board of Adjustment (BOA) on the 4th Thursday of every month.