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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 tree list. <br /> 6.10.3 No trees that 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 shall be planted in any median that is less than <br /> ten feet (10') in width. On State rights-of--way, Oregon Department of Tran_ <br /> sportation'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 waive 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 /> 7.2 Site preparation. <br /> <br /> i <br /> 7.2.1 Balled and burlapped and container grown trees: <br /> 7.2.1.1 Dig a shallow, broad tree planting hole at least 1-1 /2 times <br /> the diameter of the root ball and to a depth that will allow the trunk flare . <br /> to be level with existing ground. (See Appendix B.) <br /> 7.2.1.2 Score the edge of the hole to leave the edges. rough and not <br /> smooth. This .will encourage rooting into the existing native soil. <br /> 7.2.2 Bare-root stock: <br /> 7.2.2.1 Dig tree <br /> planting holes 1' wider than the spread of the roots <br /> to allow the roots sufficient area. The hole shall have sufficient depth to <br /> allow the trunk flare to be level with the existing ground. (See Appendix <br /> B.) <br /> 7.2.2.2 Leave a mound in the. center of the hole to drape and. <br /> spread roots in their natural position over the mound.. (See Appendix B.) <br /> 8. Planting General Conditions. ~ ®a o <br /> Street wee Plan Agreement -City Plants Alternate -18 of 25 <br /> <br />