CC 490 - Accession above and below the surface.
SECTION 2--ACCESSION IN RELATION TO IMMOVABLES
Art. 490. Accession above and below the surface.
Unless otherwise provided by law, the ownership of a tract of land carries with it the ownership of everything that is directly above or under it.
The owner may make works on, above, or below the land as he pleases, and draw all the advantages that accrue from them, unless he is restrained by law or by rights of others.
Acts 1979, No. 180, §1.