Miss. Code § 19-7-41
The board of supervisors of any county is authorized to exercise the power of eminent domain for the acquisition of land whenever public necessity and convenience so requires for the construction of a penitentiary in the county. In the exercise of such power pursuant to this section with respect to the construction of a federal correctional facility or other federal penal institution, the board of supervisors of any county having a land area of more than nine hundred (900) square miles and a population of more than twenty-five thousand (25,000) but less than twenty-five thousand six hundred (25,600) according to the 1990 federal census may exercise the right of immediate possession to real property, including oil, gas and other mineral interests, as provided in Section 11-27-81 et seq.
Miss. Code § 19-7-41