1168.08 LANDSCAPING IN PARKING AREAS.
   (a)   Landscaping within parking areas, whether ground cover or upright plant material, is necessary not only to reduce the generation of heat and water runoff, but also to visually interrupt the expanse of paved areas. The use of parking islands or peninsulas strategically placed throughout a parking area is required to landscape the interior of parking areas. The use of shade trees in these landscape areas is encouraged. All off-street parking areas, access drives, or other vehicle use areas shall be landscaped with plantings of grass, shrubs or trees according to the minimum requirements set forth hereunder.
   (b)   Screening of parking areas and service areas shall be provided through landscaping and/or ornamental walls or fences that are harmonious with adjacent development. Visual relief for parking areas greater than fifty (50) parking spaces shall be provided through the use of landscaping and trees planted on dividers, islands and around walkways.
   (c)   Interior Parking Areas.
      (1)   Parking must be partially shaded by deciduous trees (either existing or newly planted) that have or will have, when fully mature, a trunk at least twelve (12) inches in diameter. When trees are planted to satisfy the requirements of this Subsection, the types of trees chosen shall meet the standards of the Urban Forest Management Plan.
      (2)   Each tree of the type described in Subsection A shall be presumed to shade a circular area having a radius of fifteen (15) feet with the trunk of the tree as the center, and there must be a sufficient number of trees so that, using this standard, thirty (30) percent of the parking area will be shaded.
      (3)   No paving may be placed within five (5) feet (as measured from the center of the trunk) of any existing tree retained to comply with the requirements of this Chapter, and new trees  planted to comply with the requirements of this Chapter shall be located so that they are surrounded by at least two hundred (200) square feet of unpaved and pervious area.
      (4)   Parking areas shall be designed and detailed to prevent vehicles from striking trees. Parked vehicles may hang over the interior landscaped areas by no more than three (3) feet. Concrete or other wheel stops shall be provided to ensure no greater overhang or penetration into the landscaped area.
   (d)   All landscaped islands within parking areas shall be irrigated to provide an adequate water source, or must otherwise be approved by the Development Engineer.
   (e)   The following is a simple formula for determining the number of shade trees required in and around paved parking areas in order to satisfy the shading requirements of this Section:
 
(1)  Calculate square footage of the parking area, including internal drives and connected circulation areas:
 
                                            sq. ft.
(2)  Multiply
                                    X 0.30
(3)  Area to be Shaded - (Total of lines 1 x 2)
                                            sq. ft.
(4)  Area shaded by existing trees to be retained in and around the parking area (See Footnote 1)
 
                                            sq. ft.
(5)  Area shaded by new trees, if any (See Footnote 2)
                                            sq. ft.
(6)  Subtotal:
                                            sq. ft.
(If line 6 is greater than line 3, then the shading requirement has been met.  If line 6 is less than line 3, then go to line 7)
(7)  Enter the difference between line 6 and line 3
                                                sq. ft.
(8)  Divide line 7 by 707
                                                /707
(9)  Total number of shade trees required within the parking area =
                                                trees
 
Footnotes:
1.   Existing trees retained in compliance with Section 1168.05 (Existing Vegetation) will be credited according to their actual crown radius.  Shaded area may be calculated as follows:  3.14 x (crown radius)2 = shaded area.
2.   Trees planted within the parking area are credited with shading seven hundred seven (707) square feet (based on crown radius of fifteen feet).  New or existing trees on the perimeter of the parking area are credited for having only half a crown over the parking area.
(Ord. 2014-09.  Passed 2-19-14.)