Landscape plans shall be prepared based on the following design standards and guidelines. Design standards are numerically measurable design requirements that can be definitively evaluated for compliance. Design guidelines are not precisely measurable, but compliance can be determined through the evaluation process of landscape plan review. The evaluation and approval of landscape plans shall be based on compliance with both the design standards and guidelines.
   A.   Design Standards At Time Of Planting:
      1.   Deciduous Trees: All deciduous trees shall have a minimum trunk size of two inches (2") in caliper, unless otherwise specified.
      2.   Evergreen Trees: All evergreen trees shall have a minimum size of five feet (5') in height, unless otherwise specified.
      3.   Ornamental Trees: All ornamental trees shall have a minimum trunk size of one and one-half inches (11/2") in caliper, unless otherwise specified.
      4.   Shrubs: All shrubs shall have a minimum height or spread of eighteen inches (18") depending on the plant's natural growth habit, unless otherwise specified. Plants in five (5) gallon containers will generally comply with this standard.
      5.   Drought Tolerant Species: Site conditions in Salt Lake City are generally arid, and the selection of plant species suited to dry conditions is appropriate. To promote water conservation, not less than eighty percent (80%) of the trees and eighty percent (80%) of the shrubs used on a site shall be drought tolerant species that can withstand dry conditions once established. The city has compiled a list titled "Water Conserving Plants For Salt Lake City", that may be locally available.
      6.   Existing Street Trees: The removal of trees within the street right of way is prohibited without the approval of the zoning administrator in consultation with the urban forester.
   B.   Design Guidelines:
      1.   Scale And Nature Of Landscaping Material: The scale and nature of landscaping materials shall be appropriate to the size of the structures. Large scale buildings, for example, should generally be complemented by larger scale plants.
      2.   Selection Of Plants: Plants shall be selected for form, texture, color, pattern of growth and adaptability to local conditions.
      3.   Evergreens: Evergreens should be incorporated into the landscape treatment of a site, particularly in those areas where screening and buffer is required.
      4.   Softening Of Walls And Fences: Plants shall be placed intermittently against long expanses of building walls, fences, and other barriers to create a softening effect.
      5.   Planting Beds: Planting beds may be mulched with bark chips, decorative stone, or similar materials. Mulch shall not be used as a substitute for plants.
      6.   Detention/Retention Basins And Ponds: Detention/retention basins and ponds shall be landscaped. Such landscaping may include shade and ornamental trees, evergreens, shrubbery, hedges, turf, ground cover and/or other plant materials.
      7.   Water Conservation: Landscape design pursuant to the requirements of this chapter must recognize the climatic limitations of the Salt Lake City area and the need for water conservation. While irrigation systems are required for certain landscape areas, and may be desirable for other applications, all irrigation systems shall be designed for efficient use of water.
      8.   Turf Grasses: Turf grasses should be used in areas with less than a fifty percent (50%) slope to prevent the runoff of irrigation water.
      9.   Energy Conservation: Plant placement shall be designed to reduce the energy consumption needs of the development.
         a.   Deciduous trees should be placed on the south and west sides of buildings to provide shade from the summer sun.
         b.   Evergreens and other plant materials should be concentrated on the north side of buildings to dissipate the effect of winter winds.
      10.   Preservation Of Existing Plants: Existing plants should be incorporated into the landscape treatment of a site as required herein or as required by the site plan review process found in chapter 21A.58 of this title. Trees in the public right of way shall not be removed without the approval of the zoning administrator and urban forester.
      11.   Berming: Earthen berms and existing topographic features should be, whenever determined practical by the zoning administrator, incorporated into the landscape treatment of a site, particularly when combined with plant material to facilitate screening. (Ord. 45-07 § 2, 2007: Ord. 88-95 § 1 (Exh. A), 1995: Ord. 26-95 § 2(24-5), 1995)