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<br />Davey Resource Group, Inc. <br />Tree Inventory Analysis & Maintenance Strategy <br />Page 21 <br /> <br /> Figure 12. Trees included in the routine pruning cycle as of the completion of the inventory. <br />YOUNG TREE TRAINING CYCLE RECOMMENDATIONS <br />● The City of Orono should institute a three-year young tree training cycle beginning after the <br />completion of all recommended higher priority work. With 957 young trees with condition <br />ratings of Excellent, Good, and Fair at the time of the inventory, approximately 319 need to <br />be assessed and pruned each year during the three-year cycle. In future years, the number of <br />trees in the young tree training cycle will depend on the growth rates of young trees in the city <br />and the number of new plantings. <br />● Young tree training is recommended to begin one to two years after planting and continue every <br />three years until the tree can no longer be safely pruned from the ground with a pole pruner and <br />pruning shears. <br />o At the time of planting, new trees should be minimally pruned to remove broken or <br />crossing branches. <br />● Not every tree in the young tree training cycle will need to be pruned each cycle – thus, the actual <br />cost to maintain a young tree pruning cycle will likely be lower than projected in the budget table <br />provided at the end of this section (Table 4). <br />ROUTINE INSPECTIONS AND INVENTORY <br />UPDATES <br />Inspections are essential to uncovering potential problems with trees. They should be performed by a <br />qualified arborist who is trained in the art and science of planting, caring for, and maintaining individual <br />trees. Ideally, the arborist will be ISA Certified and hold the ISA Tree Risk Assessment Qualification (TRAQ) <br />credential. <br />Level 1 and 2 assessments can be completed during regular tree maintenance activities, such as routine <br />pruning, to streamline the process and reduce workloads and cost. When trees need additional maintenance, <br />they should be added to the work schedule immediately. Use asset management software such as TreeKeeper® <br />to update inventory data and schedule work records. <br />355 415 <br />184 91 29 11 6 <br />956 <br />541 <br />183 <br />62 48 13 11 <br />0 <br />200 <br />400 <br />600 <br />800 <br />1,000 <br />1,200 <br />7-12" 13-18" 19-24" 25-30" 31-36" 37-42" >42"Number of Trees Included in Routine Pruning CycleSize Class <br />Parks Streets <br />248