Constructing a billboard structure is more complex than it might appear at first glance. After the necessary permits are obtained, groundbreaking can begin. The first step is to erect the monopole which will support the superstructure. This monopole's column averages 30 to 38 inches in diameter. The total length of the monopole is 45 feet, 19 feet of that is buried underground, then finishing with a 26-foot HAGL (Height Above Ground Level).