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1 combination of trees and shrubs shall meet or exceed the minimum required canopy <br />2 cover square footage. The minimum canopy cover required shall be as follows: <br />3 1. Determine ratio of impervious area (including stormwater ponds below the 100- <br />4 year flood elevation) to entire site. <br />5 2. Multiply the impervious area/site area ratio by the square footage of the <br />6 pervious area to calculate the required canopy cover square footage for the <br />7 project area. <br />8 3. The following formula shall be utilized to determine the average canopy cover <br />9 of a species: [(Minimum + Maximum Spread) : 4]2 x rc x (0.65 for preferred <br />10 species or 0.50 for acceptable species, as identified in the Ramsey Tree Book). <br />11 4. Due to the unique nature of the COR district, flexibility with the minimum <br />12 planting standards may be approved if space is a limiting factor. <br />13 c. Minimum size of plantings. Required trees and shrub shall mcct or exceed the following <br />14 size standards: <br />Plant Type Sizc <br />Deciduous Tree 2.5 ineh-calipe+ <br />Coniferous Tree 6 feet in height <br />Ornamental/Under-story Trcc 1.5 inch caliper <br />Deciduous Shrub act in height <br />Coniferous Shrub act in height or width, based on growth characteristics <br />15 <br />16 c. Road frontage plantings. For every 35 feet of public road frontage, one overstory tree <br />17 shall be planted adjacent to the road right-of-way on private property. These plantings <br />18 are credited toward the minimum planting requirements for the district. <br />19 d. Parking lot landscaping. All parking lots are required to provide internal and/or <br />20 adjacent overstory tree plantings in an effort to shade parking surfaces and provide <br />21 visual relief. The planting schedule is established to provide an acceptable number of <br />22 plantings that may be planted in regular symmetrical patterns or irregular clusters or <br />23 groupings. Plantings are required at the following minimum schedule and are credited <br />24 toward the minimum planting requirements for the district: <br />25 1. 1 tree per every ten parking spaces. <br />26 2. Every overstory tree planting shall be provided with a planting area of at least <br />27 162 square feet (equivalent of a 9 foot x 18 foot parking stall). <br />28 3. Acceptable ground cover materials include sod, mulch, and other natural <br />29 ground cover. Landscaping rock and plastic underlayment is prohibited in <br />30 planting islands. <br />31 e. Bufferyards. Bufferyards help to achieve screening between differing uses with varied <br />32 intensities and impacts that are not always complementary when adjacent to one <br />33 another. When a bufferyard is required, the yard space and planting requirements are <br />34 not to be reduced for other purposes such as future parking and driveways, building <br />35 expansions, or other activities that are not in keeping with the purposes of buffering <br />36 and screening. <br />37 1. Bufferyards are intended to provide additional screening of businesses that are <br />38 adjacent to residential areas. The following table details the width of the <br />39 bufferyard along the common adjacent property line. An additional increase of <br />40 landscape plantings is required in the bufferyard. The table below outlines the <br />41 minimum required additional plantings, expressed as a percentage of the total <br />Page 87 of 160 <br />