La. Stat. tit. 38 § 351
Notwithstanding any other law to the contrary, and in addition to the methods and procedures for acquisition or utilization of servitudes for levee and related purposes by levee districts and levee and drainage districts, whenever any levee district or levee and drainage district cannot appropriate or amicably acquire immovable property needed for levee purposes, including but not limited to flooding and hurricane protection purposes, or integrated coastal protection projects, the levee district or levee and drainage district may acquire the property by expropriation prior to judgment in accordance with the provisions of this Part. The method of expropriation provided by this Part shall be authorized for corporeal property and servitudes and for both riparian and nonriparian property.
La. R.S. § 38:351