W. Va. Code § 11-6M-1: Property Tax Treatment of Silicon and Silicon Carbide Manufacturing Equipment.

(a) Notwithstanding any other provision of this code to the contrary, for all assessments made on or after July 1, 2025, until July 1, 2035, the value of silicon and silicon carbide manufacturing equipment, for the purpose of ad valorem property taxation under this chapter, shall be its salvage value, being no more than five percent of its fair market value for which such equipment would sell in place if voluntarily offered for sale.

(b) As used in this article, "silicon and silicon carbide manufacturing equipment" means any personal or real property and fixtures thereon, which are designed, constructed, and installed primarily for the purpose of processing, concentrating, converting, transforming, or manufacturing silicon and silicon carbide into a raw material and directly and ancillary to the product process: Provided, That the personal or real property and fixtures used are not silicon and silicon carbide manufacturing equipment when it turns raw materials into finished goods through the use of tools or machinery, such as, without limitation, machining, casting, molding, or fabricating.