<br />3. Tree Pruning Standards. <br />3.1 All trees shall be pruned according to the guidelines published by the <br />International Society of Arboriculture current edition or the pruning standards and <br />specifications of the National Arborist Association current edition unless modified herein. <br />3.2 All tree work shall be performed following Oregon Safety and Health <br />Administration regulations and following the American National. Standards Institute, <br />A.N.S.I. 2133.1, 300, or current version. <br />3.3 Pruni <br />3.3.1 <br />. 3.3.2 <br />3.3.3 <br />3.3.4 <br />3.3.5 <br />3.3..6 <br />ag shall be deemed necessary when such action is to: <br />Correct structural problems, remove deadwood.and decayed parts, <br />Enhance the tree's natural beauty and develop 'its natural shape, <br />Comply with the Eugene Code, 1971, <br />Correct a safety or health problem, <br />Clear the vision of regulatory signs, or <br />Maintain clearance around electrical lines. <br />3.4 All .tree work performed near electrical lines shall conform to American <br />National Standards Institute C2, National Electrical Safety Code, and the Oregon Public <br />Utilities Commission Tree Clearance Policy, current edition. <br />3.5 Trees pruned for electrical line clearance shall follow the pruning guidelines'. <br />contained within. the publication of Dr. Shigo entitled "Pruning Trees Neat'Electrical <br />Lines' current edition and be performed in accordance with the written agreement between <br />the Eugene Water & Electric Board (EWEB) and the City. <br />3.6 Unless otherwise required herein, young trees shall be pruned leaving at <br />least two-thirds (2/3) of theheight of the tree in foliage and canopy. <br />3.7 Mature trees shall be pruned to meet standards. In many instances, the <br />majority of shade leaves will remain in order to develop branch taper. <br />3.8 No tree shall have more than 20 % of its canopy removed in any one <br />pruning or any one year unless approved in writing by the Urban Forester. <br />.Administrative Order - 13 <br />11/11/96 <br />