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5.4 Trees shall be pruned so at least two thirds of the tree's height is canopy <br />with one third of the height being the trunk. <br />5.5 The lower limbs shall be pruned off or tipped back to meet compliance with <br />the requirements for clearance over sidewalks and streets as contained in the Eugene Code, <br />1971. <br />5.6 Initial structural pruning shall be performed at the end of the three year <br />establishment period. A strong scaffold branch structure shall be developed by pruning <br />to select the primary scaffold branches. <br />5.7 Pruning shall be performed according to the approved Urban Forestry <br />pruning standards and specifications. <br />6. Tree Replacement. Any tree that falls under one or more of the following <br />conditions shall be replaced by the developer during the next approved planting season after <br />receipt of the notice of the need to replace the tree. <br />6.1 Dead tree. This shall include any tree that has no live growth originating <br />in the scaffolding branches. <br />6.2 Stressed tree. This shall include any tree that has lost a minimum of 50 <br />of its total foliage or, has a reduction of 50 % of normal leaf size for that species. <br />6.3 Non-approved tree. This shall include any variety of tree that is not listed <br />on the Approved Street Tree Species List, or that has not been approved by the Urban <br />Forester. <br />7. Tree Protection. Trees shall be protected during the establishment period by the <br />use of the following measures: <br />7.1 Installation of bark mulch in the drip line, which is the area directly below <br />the tree's branches, 2-4 inches in depth and a minimum of 3 ft. x 3 ft. <br />7.2 No construction or human activity shall take place within the tree's critical <br />root zone. <br />7.2.1 The critical root zone for trees 3" or smaller in caliper shall be an <br />area with a radius of at least 3' from the trunk. <br />7.2.2 The critical root zone for trees over 3'° in caliper shall be an area <br />with a radius of at least 1' .5" from the trunk for every 1 " of caliper size. <br />7.3 No soil grade changes shall take place within the critical root zone. <br />7.4 No storage of material shall be allowed within the critical root zone or <br />protected area of the tree. <br />Street Tree Plan Agreement -City Plants Alternate - 21 of 25 ~ ~ ~ ~ V <br />