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6.5 Overhead utility lines: No tree with the potential of reaching a mature <br /> height of more than thirty-five feet (35') shall be planted in the right -of -way under <br /> "primary" overhead wires. <br /> 6.6 Minimum distance from buildings: <br /> Small trees (potential growth of up to 35' ht.) 5 feet <br /> Medium trees (potential growth of up to 60' ht.) 10 feet <br /> Large trees (potential growth of over 60' ht.) 15 feet <br /> Shrubs 3 feet <br /> Any tree planted ten feet (10') or closer to a building shall have an impenetrable <br /> root barrier installed near the building. The root barrier shall run the length of the <br /> planting 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 -way: Shrubs shall follow the <br /> minimum distance requirements for trees for curbs, sidewalks, and utilities. No <br /> shrub 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 <br /> (30') . Depending upon the size, species, and variety, the Urban Forester may <br /> approve planting distances which may be as close as ten feet (10') and as far as <br /> forty feet (40') to fifty feet (50') based on the size and growth habit of the tree. <br /> 6.10 Width of planting area within City right -of -way ( i.e.. distance <br /> between the curb and sidewalk): <br /> 6.10.1 No tree shall be planted where the rooting space is less than <br /> four 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 tree list. <br /> 6.10.3 No trees that commonly produce a large buttress root system <br /> shall be planted in a site less than eight feet (8') wide (i.e., Quercus phellos, <br /> Acer macrophyllum, Liquidambar styraciflua) . <br /> 6.11 Width of medians: No tree shall be planted in any median that is less <br /> than ten feet (10') in width. On State rights -of -way, Oregon Department of <br /> Transportation's "Guidelines for Planting Within Highway Right -of -Way" apply. <br /> Exhibit B to Street Tree Plan Agreement <br />