Definitions. The following definitions apply to regulations governing the preservation and removal of trees contained in this section exclusively:
"Arborist, certified"
means a licensed tree care consultant, who is certified as an arborist by the International Society of Arboriculture, or other arborist approved by the city.
"Canopy cover"
means the area above ground that is covered by the trunk and branches of the tree.
"Commercial forestry"
means the removal of 10 or more trees per acre per calendar year for sale. Tree removal undertaken by means of an approved tree removal plan under subsection (F) of this section is not considered commercial forestry under this definition.
"Cut"
means to fell or remove a tree or to do anything that has the natural result of causing the death or substantial destruction of a tree, including girdling and topping.
"Development"
means grading, excavation, fill, or construction on a site requiring development review, conditional use approval, subdivision approval, or planned unit development approval.
"Diameter"
means diameter of tree measured at four and one-half feet above grade on the uphill side. In the case of multi-stemmed or trunked trees, the diameter shall be the sum of diameters of all individual stems or trunks, measured at a point no more than six inches above the surrounding grade or measured six inches from the point where the stems digress from the trunk, whichever produces the larger measurement. If a tree has been removed and only a stump shorter than four and one-half feet remains, diameter shall be measured as the diameter of the top of the stump.
"Girdling"
means the cutting or removal of the outer bark and conducting tissues of a tree, potentially causing death by interrupting the circulation of water and nutrients.
"Hazardous tree"
means a tree that by reason of emergency conditions, disease, infestation, age, or other condition presents a known and immediate hazard to persons or to public or private property.
"Pruning"
means the cutting or trimming of a tree in a manner consistent with recognized tree maintenance practices.
"Removal"
means cutting or removing 50 percent or more of the crown, trunk or root system of a tree, or any action that results in the loss of aesthetic or physiological viability or causes the tree to fall or be in immediate danger of falling. "Removal" includes topping, but shall not include pruning performed to applicable standards.
"Significant natural resource areas"
means those lands described in Chapter 17.46 LCMC.
"Topping"
means the severe cutting back of the tree's crown limbs to stubs to such a degree so as to remove the natural canopy and disfigure the tree.
"Tree"
means a perennial woody plant, typically of eight feet or more in height, with a single main stem (the trunk or bole), or in some cases, multiple trunks, from which branches and twigs extend to form a characteristic crown of foliage.
1.
"Large tree"
includes any tree that has a trunk at least six inches in diameter (see definition of diameter).
2.
"Mitigation tree"
includes any tree required by this section as a replacement for a tree removed.
3.
"Protected tree"
includes any tree preserved in a tree protection or landscape plan, any tree planted as mitigation for removed trees, any tree planted to fulfill a requirement of the city code, and any tree planted to replace protected trees that died or were removed.