La. Stat. tit. 13 § 5527
The sheriff of any parish in which the United States government owns land or has any control over a waterway, floodgate, or lock may contract with any federal agency to provide law enforcement services thereon and to receive reimbursement for expenses incurred in connection with furnishing such services. Pursuant to this Section, "law enforcement services" shall include a contract between a sheriff and any agency of the United States government to provide inmate labor for maintaining, operating, opening, and closing floodgates or locks situated within a parish which are operated by or under the control or jurisdiction of the federal agency. Any monies received pursuant to such contracts shall be deposited in the sheriff's general fund and may be used as necessary to effectuate the purposes of this Section.
La. R.S. § 13:5527