The temporary use of the land area adjacent to Lake Ray Hubbard for recreational purposes is supplemental to the purpose of the lake as a water supply reservoir. Nothing in this article is intended to bring the area within the scope of Chapter 26 of the Texas Parks and Wildlife Code; provided, that Elgin B. Robertson Park, an area of 257 acres located in Dallas and Rockwall Counties on a peninsula between the East Fork and Muddy Creek arms of Lake Ray Hubbard, was purchased for park and recreational purposes and forms a part of the City of Dallas Park System. (Ord. Nos. 15071; 21176)