(a) If the acquisition is necessary for the construction of an intracoastal canal, a county may, by purchase or by exercising the county's power of eminent domain, acquire public or private land, a right-of-way, an easement, or dumping ground privileges.
(b) The county must exercise the power of eminent domain in the manner provided by Chapter 21, Property Code. A county may not condemn land under Subsection (a) if the land is used for cemetery purposes.