All lands comprising the bed and bottom of Black Bayou belonging to the State of Louisiana within the said area, as provided in R.S. 38:2821, and which are necessary to the erection and maintenance of said Black Bayou Lake are hereby granted to the Black Bayou Watershed District for the purposes herein set out, but this grant shall in no wise abridge the right of the state to lease the said land for the production of oil, gas and other minerals under the general laws of the state as now provided.
La. R.S. § 38:2841