15-24-3002. Rollback tax -- computation. (1) (a) If an owner or operator fails to perform the contract pursuant to 15-24-3001(1), the property is subject to a rollback tax in addition to the property tax levied on the property. The rollback tax is a lien on the property and is due and payable by the owner of the property within 180 days after failure to perform the contract.

(b) As used in this section, "rollback" means the period of time that an owner or operator of an electrical generation facility was exempt from property taxes pursuant to 15-24-3001.

(2) The department shall determine the amount of rollback tax due on the property by:

(a) determining the taxable value of the property;

(b) multiplying this value by the sum of the annual mill levies that would have been levied had the property exemption pursuant to 15-24-3001 not been applied in the taxing jurisdiction in which the electrical generation property is located during the rollback period; and

(c) subtracting from this figure the actual property tax paid on the property during this period less any impact fee paid pursuant to 15-24-3005, if any.