Louisiana constitution
Article 1
Section 4

(4) After one year from the completion of the project for which property was expropriated, the original owner or his heir, or, if there is no heir, the successor in title to the owner at the time of expropriation may petition the state or its political subdivision which expropriated the property to have all or any portion of his property declared surplus. If the state or its political subdivision refuses or fails to identify all or any portion of the expropriated property as surplus, the original owner or the successor in title may petition any court of competent jurisdiction to have the property declared surplus.