La. Stat. tit. 49 § 214.6.9
The Coastal Protection and Restoration Authority and its authorized agents, contractors, or and employees shall also have the power to enter upon any lands, waters, and premises in the state for the purpose of making such surveys, soundings, drillings, and examinations as may be necessary or convenient for carrying out the purposes of integrated coastal protection, which entry shall not be deemed a civil or criminal trespass nor a temporary construction servitude, nor shall it be deemed an entry under any eminent domain proceedings which may be then pending, provided that prior written notice of five days to resident owners and fifteen days to nonresident owners be given to the last record property owner as reflected in the parish assessment rolls. Written notice shall consist of mailing the notice by certified mail to the last known address of the owner as shown in the current assessment records. The Coastal Protection and Restoration Authority shall indemnify the property owner for any loss or injury resultant from entry upon the property and shall make reimbursement for any actual damages resulting to lands, waters, and premises as a result of these activities.
La. R.S. § 49:214.6.9