For the purpose of this section, "development plan" means a plan drawn to scale, certified by an engineer and/or architect, showing the locations of existing and new structures; location map, lot coverage, height and gross floor area of structure; lot area; the placement and arrangement of buildings; and the uses to be included; topography, on-site drainage, retention and detention areas, drainage flow, proposed lighting of the premises; internal vehicular and pedestrian circulation; vehicular and pedestrian ingress and egress from adjoining streets; recorded and proposed easements; location of off-street parking and loading facilities; any significant natural features, including drainage and vegetation; location and type of landscaping; and the type of visual screening, such as walls, fences and landscaping. If it is proposed to develop the plan in phases, the phases of development shall be indicated along with any other information requested by the Planning staff, DRT, or Planning Commission.