06/09/2010 P&Z Packet - Laserfiche WebLink

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1 Attachment 2: Landscaping and Tree Preservation Standards - REVISED May 26, 2010 anticipated use. Mulch is acceptable in landscape beds and areas not suitable for living groundcovers. iv. Hardy perennial forbs and ornamental grasses should be used in car overhang areas and places where snow may be stored. 4) Annual plantings should be minimized within 10' of a tree. The process of frequently replanting may damage the tree's shallow root system. 5) Seed mixes should be used in large expanses of naturalized areas. The City shall maintain a list of approved seed mixes. Where seed mixes are used, the City may request that visible edge treatments be planted with more deliberate groupings of flowering plants. 6) A permanent solid edge such as a 6" concrete, stone or other barrier is required between native seeded areas and turf unless otherwise approved by the City. b. Planting Requirements: 1) To promote development of a large, healthy canopy, trees shall be planted in accordance with the requirements in the following table and illustration: Page 10 Planting Requirements Tree Size Minimum island width for roots (back of curb to back of curb) Minimum tree opening Minimum planting soil depth Minimum cubic feet of soil available per tree in a single bed Minimum cubic feet of soil available per tree in a shared bed or three sided island Large Tree 9, -0" 4' x 6' or 5' x 5' 241Q" 440499 CF 400325 CF Medium Tree 6' -0" 5' x 5' or 2431" 300459 CF 27045 CF Small Tree 5' -0" 4' x 5' 4830" 250489 CF 225435 CF E loimurn island Width y< ph n,.'II 16' typical ca; space f°rG' Li .'. Planting Soil Calculate planting sal volume by Length a Width x Depth 6irgineer "ed PI_,- tint: soil Minimum Island Width dimensicm can be reduced to the Minimum Tree Opening dimension if engi veered planting soils are used beneath adjacent hardscape to achieve required soil volume. • •