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Practices in effect at the time the topping occurs, except that topping shall not in any <br /> context mean pruning measures commonly used to maintain trees grown for the <br /> purpose of crop production. <br /> Tree. A self supporting, perennial woody plant characterized by one main <br /> trunk or, in some cases, multiple trunks, and one main canopy of leaves, usually <br /> growing to a height of 15 feet or more. <br /> Tree preservation. Protection of an existing tree from damage or stress such <br /> that the tree is likely to survive and continue to grow normally in a healthy condition, <br /> through measures that avoid or minimize damage to branches, canopy, trunk and <br /> roots of the tree. Such measures may include, but are not limited to, installation of <br /> tree protective fencing, mulching and watering of roots, supervision of work by an <br /> arborist, installation of aeration or drainage systems, root pruning, and use of non- <br /> destructive excavation techniques. <br /> Tree removal. To fell or sever a tree or to use any procedure, the natural <br /> result of which is to cause the death or substantial destruction of the tree. Substantial <br /> destruction includes actions that destroy more than 30 percent of the critical root zone <br /> of a tree, or topping, or severing the cambial material on 50 percent or more of the <br /> circumference of the tree trunk. Remove does not in any context include those <br /> pruning standards as defined in the edition of American National Standards Institute <br /> (ANSI) Section A300, Tree, Shrub and Other Woody Plant Maintenance Standard <br /> Practices in effect at the time the pruning occurs. <br /> Urban Forester. The person authorized by the city manager to carry out the <br /> duties and responsibilities of the city's urban forester under provisions of this code. <br /> 6.302 Tree Removal and Replacement - Purpose, Scope, and Applicability. <br /> (1) Purpose. Sections 6.300 to 6.335, and the rules issued thereunder, are <br /> intended to conserve Eugene's natural environment, while providing for the reasonable economic <br /> use and enjoyment of property, through: <br /> (a) Maintaining and preserving minimum levels of trees throughout the <br /> community while achieving the city's goals for a healthy economy, affordable <br /> housing, and reduced sprawl; <br /> (b) Managing trees on public lands, including street trees and park land <br /> trees, in a manner designed to preserve existing trees and promote beautification in <br /> the city; <br /> (c) Mitigating the loss of the essential functions of the urban forest <br /> through the planting of new trees; <br /> (d) Ensuring a healthy future urban forest by protecting areas that contain <br /> mixed age stands, a diversity of tree species, and valuable forest soils, such as <br /> wildlife corridors and stream buffers; <br /> (e) Minimizing the unnecessary removal of trees by encouraging the <br /> integration of existing trees into site design; and <br /> (f) Establishing minimum measures for protection of trees during <br /> construction activity and minimum standards for planting replacement trees. <br /> • <br /> Ordinance - 3 <br />