5.3.2.   PURPOSE
   To protect the ’s unique visual setting and promote its economic well-being, performance standards are required to assure design sensitivity to the natural scenic quality. These standards are established to provide for the preservation of:
   A.   Views of prominent mountain that form the limits of scenic viewsheds and provide a natural backdrop for sensitively designed ;
   B.   Viewsheds that provide the observer with a visual perspective of the area in terms of foreground, middle ground, and background;
   C.   The scenic quality of the desert and mountain environment through the retention of and natural topography; and,
   D.   View windows through an aesthetic screening or siting of developmental elements that are incompatible with the natural qualities of the surrounding area.