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• <br /> 3. Street Tree Quality Standards at Time of Planting. <br /> 3.1 The tree shall have a straight trunk perpendicular to the ground with a <br /> minimum branching height at 4' above the ground for trees 1.5" in caliper to a minimum <br /> of 6' above the ground for trees 2" in caliper. <br /> 3.2 Trees shall be grown to the standards and specifications of the American <br /> Association of Nurserymen, American Standard for Nursery Stock, currently in use. <br /> 3.3 Trees shall be provided reasonably free, as defined by nursery industry <br /> standards for street trees, from insects and disease, decay, major structural defects, and <br /> damage to the trunk, branches and root system. <br /> 3.4 Trees structural scaffold branches shall be well proportioned where they <br /> attach to the main trunk, with an average spacing of at least six inches. <br /> 4. Street Tree Size Standards at Time of Planting. <br /> 4.1 Trees for residential classed streets shall be a minimum of 1.5" in caliper, <br /> measured 6" above mean ground level, 8' -10' in height. <br /> 4.2 Trees for collector or arterial streets less than 2" caliper, but not less than <br /> 1 -1/2" caliper, may be planted using the developer plant and option in R- 7.280 -B.1. If <br /> less than 2" caliper trees are used, the establishment period shall be the greater of either <br /> the standard three years or until the tree has reached 2" in caliper. <br /> 4.3 Notwithstanding 4.1 and 4.2, trees for all streets abutting commercially <br /> zoned properties shall be a minimum of 2" in caliper, measured 6" above mean ground <br /> level, 10' -12' in height. <br /> • <br /> 5. Tree Condition at Time of Planting. Trees may be provided in the following • <br /> conditions at the time of planting: <br /> 5.1 Balled and burlapped and in wire baskets, providing: • <br /> 5.1.1 Trees shall have a sound ball with a firm attachment of the trunk <br /> with the root ball. The trunk shall not be loose but firmly held within the root ball. <br /> 5.1.2 Root balls shall conform to the standards and specifications of the <br /> American Association of Nurserymen, American Standard for Nursery Stock, <br /> currently in use for size and condition. <br /> 5.1.3 Root balls of trees shall not be allowed to dry out at any time from <br /> the nursery to final planting. _ <br /> 5.1.4 Trees shall have a well developed root system and not be root bound <br /> or have circling /girdling roots. <br /> Street Tree Plan Agreement - City Plants Alternate -15 of 25 9 9 - 0 0 4 0 5 <br />