La. Stat. tit. 38 § 2821
The Black Bayou Watershed District is hereby created out of Black Bayou embracing the area north of the present Black Bayou dam situated and located on State Route 109 in Caddo Parish, the watershed of said bayou north of said dam and the area immediately south of said dam which is affected by said dam, which area is described as follows, to-wit:
All of the area presently comprising Ward 9 of Caddo Parish, all of that part of Ward 1 of Caddo Parish lying north of the following line, to-wit: Begin at the intersection of the East line of Ward 2 of Caddo Parish and the Belcher-Caddo City Road (State Route #530) thence run Easterly along said road to the Gamm Road, thence run Northerly along said Gamm Road to the North line of Section 26, Township 21 North, Range 15 West, Caddo Parish, thence run Easterly to the East Boundary of Caddo Parish, and all of that part of Ward 2 of Caddo Parish lying north of the following line, to-wit: Begin at the intersection of the Texas state line and the North line of Section 17, Township 20 North, Range 16 West, Caddo Parish, thence run Easterly to the East boundary of Ward 2 which is situated along the Clyde Place Canal.
La. R.S. § 38:2821