Miss. Code Ann. § 65-7-89: Miss. Code Ann. § 65-7-89

When the board of supervisors shall be unable to agree with the owners for any land necessary for widening any existing public road or for making changes therein or for laying out new public roads, it is authorized and empowered, in addition to the methods of procedure provided in previous sections of this chapter, to condemn any such land in the name of the county in the manner as is provided by law for the exercise of the right of eminent domain.