Fencing adjacent to parks and open space shall be placed at least five feet back from the top of slope and shall be earth tone or black in color and allow visual penetration (Illustration 4). Materials such as wrought iron and vinyl fencing may be used. Wood fencing is not allowed in this instance. Fence location and design details shall be submitted with development plans including subdivisions and grading plans. Solid walls may be required adjacent to parks when deemed appropriate by the city. (Ord. 4391 § 1 (Exh. A), 2006)