La. Stat. tit. 9 § 2971
It shall be conclusively presumed that any transfer, conveyance, surface lease, mineral lease, mortgage or any other contract, or grant affecting land described as fronting on or bounded by, or as described pursuant to a survey or using a metes and bounds description that shows that it actually fronts on or is bounded by a waterway, canal, highway, road, street, alley, railroad, or other right-of-way, shall be held, deemed and construed to include all of grantor's interest in and under such waterway, canal, highway, road, street, alley, railroad, or other right-of-way, whatever that interest may be, in the absence of any express provision therein particularly excluding the same therefrom; provided, that where the grantor at the time of the transfer or other grant holds as owner the title to the fee of the land situated on both sides thereof and makes a transfer or other grant affecting the land situated on only one side thereof, it shall then be conclusively presumed, in the absence of any express provision therein particularly excluding the same therefrom, that the transfer or other such grant thereof shall include the grantor's interest to the center of such waterway, canal, highway, road, street, alley, railroad, or other right-of-way; provided further, however, that no then existing valid right-of-way upon, across or over said property so transferred or conveyed or so presumed to be conveyed and no warranties with respect thereto shall be in any manner or to any extent impaired, prejudiced, or otherwise affected by any of the terms and provisions of this Part or because of the failure of such grantor or transferor to therein make special reference to such right-of-way or to include or exclude same therefrom.
La. R.S. § 9:2971