Agenda - 04-16-2002 - 8b - Laserfiche WebLink

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5 be removed immediately; tree#1, #4, #7 and #11 need corrective pruning immediately in order to eliminate various numbers of defective parts in their crowns; and tree#10 needs an aerial inspection of the crown's branchwood and elimination of further damage to the surface roots near the base of the tree." (Trees are plotted by number in Attachment 2). The problems the most-damaged trees are exhibiting, according to Dr. McGraw, include extensive cavities, deadwood and defective branches (see examples of damage in the photos in Attachment 3). He also said that, "Due to the siting of each of these eleven maples, adjacent to either pedestrian entryways, a municipal street, parking or overhead electrical utility lines and the unpredictable defective structural conditions listed, expedient corrective pruning or removal of these trees as described for each tree would be most prudent." At this time, Public Works staff recommends the removal of all eleven maples and the replacement of each one with a tree of the same type, about 6" in diameter and reaching to approximately 20 feet in height. The trees will be moved back from the existing retaining wall into a better position that will prevent problems with the old tree's root systems. A twelfth tree will replace the one that fell and a thirteenth tree will be added to the east side of the building. Each tree will be replaced with the same type that was previously there: sugar maples along the front of the building and red maples along the side. Reasons to consider replacing and changing the position of all trees: Providing improved root growth area; Increasing distance from the retaining wall to allow room for root growth; Providing adequate mulch area ring which should be sized to about 6% Providing adequate watering area; Providing shade for the building; Creating symmetry in locating trees in line around building which improves aesthetics; and Providing increased distance from overhead power lines. All of these tree removals and installations would be conducted by area professionals with experience in the field through a competitive bidding process. Every effort to follow recommended maintenance plans for the new trees would then be followed. 1 met with the Hillsborough Tree Board on January 16, 2002 and the members unanimously, approved the recommendation to remove eleven trees and one stump and install the 13 new maples.