Ky. Rev. Stat. § 143.020 : — REVENUE AND TAXATIONCOAL TAX — Imposition of tax on severance or processing of coal

For the privilege of severing or processing coal, in addition to all other taxes imposed by law, a tax is hereby levied on every taxpayer engaged in severing and/or processing coal within this Commonwealth at the rate of four and one-half percent (4.5%) of the gross value of all coal severed and/or processed during the reporting period; except that the minimum tax for a reporting period shall be an amount determined by applying a rate of fifty cents ($0.50) per ton to the total number of tons severed during the reporting period. The minimum tax shall not apply to a taxpayer who only processes coal.