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<br />- Any tree planted ten feet (10') or closer to a building shall have an impenetrable root. <br />• barrier installed near the building. The root barrier shall run the length of the planting <br />area or the structure, and reach a depth of at least eighteen inches (18 "). <br />6.7 - Vehicular area: Provisions shall be made to prevent any parts of the <br />vehicles from touching trees. <br />6.8 Shrubs planted in the street side right-of-waX: Shrubs shall follow the <br />minimum distance requirements for trees for curbs, sidewalks, and utilities. No shrub <br />shall be .planted within three feet (3') of a building. <br />6.9 Linear spacing: Trees shall be placed. an average of every thirty feet (30'). <br />Depending upon the size, species, and variety, the Urban Forester may approve planting <br />distances which may be as close as ten feet (10') and as far as forty feet (40') to fifty feet <br />{50') based on the size and growth habit of the tree. <br />6.10 Width of planting area within City right-of--ways i.e., distance between the <br />curb~and sidewalkl: <br />6.10.1 No tree shall be planted:,: where the rooting space is less than four <br />feet (4') in width without prior approval of the Urban Forester. <br />6,10.2 The minimum width of a planting site for each. tree shall be <br />governed by the approved street treelist. <br />6.10.3 No trees than commonly produce a large buttress root system shall <br />be planted in a site less than eight feet (8') ,.wide (i.e., Quercus phellos, Acer <br />macrophyllum, Liquidambar styraciflua). <br />6.11 Width of medians: No tree shallbe planted in any median that is less than <br />ten feet {10') in width. Qn State rights-of-way, Oregon. Department of Transportation's <br />"Guidelines for Planting Within Highway. Right-of-Way" apply. <br />6.12 Exemptions to the tree location-standards: Where special conditions exist, <br />the Urban Forester may wave these tree planting location standards. Such a waiver shall <br />be on a case by case basis. <br />7. Street Tree Planting Standards.... <br />7.1 Planting Season. Bare root trees may be planted only between October 15th <br />and March 15th unless otherwise approved by the Urban Forester. Balled and burlapped <br />or container grown trees may be planted only between September 15th and April 15th <br />unless otherwise approved by the Urban Forester. <br />Administrative Order - 7 11/11/95 <br />