W. Va. Const. art. III, § 9

Private property, how taken. Private property shall not be taken or damaged for public use, without just compensation; nor shall the same be taken by any company, incorporated for the purposes of internal improvement, until just compensation shall have been paid, or secured to be paid, to the owner; and when private property shall be taken, or damaged for public use, or for the use of such corporation, the compensation to the owner shall be ascertained in such manner as may be prescribed by general law: Provided, That when required by either of the parties, such compensation shall be ascertained by an impartial jury of twelve freeholders.