Alter (verb).A tree protected under this section is considered to be altered if one or more of the following occurs: Severing or partially severing the main trunk of a single-trunk tree or more than twenty-five percent (25%) of the trunks of a multi-trunk tree; more than twenty-five percent (25%) of the critical root zone is affected by a means listed in 6.1.5A or more than twenty-five percent (25%) of its canopy is removed.
Alteration (noun).Any act that causes or may reasonably be expected to cause a tree protected under this section to die, including, but not limited to, any of the following: uprooting any portion of the tree's root system; severing the main trunk of the tree; inflicting damage upon the tree's root system by machinery, storage of materials, or the compaction of soil above the root system of a tree; changing the natural grade of the critical root zone of a tree or of an area that sits uphill from the critical root zone of the tree so as to divert the flow of water to or away from the critical root zone; applying herbicides or other chemicals lethal to trees within the area of the critical root zone, including portions of the tree that extend above ground; placement of impermeable material over any portion of the critical root system of a tree; and trenching within the critical root zone.
Canopy.The upper vegetative cover of a tree (see Figure 6.1.5-1).
Critical root zone.The area of undisturbed natural soil around a tree defined by a horizontal circle drawn at grade with the center being the center of the tree trunk of a single-trunk tree or approximate center of all trunks of a multi-trunk tree and a radius equal to one foot (1') from the tree trunk for each diameter inch of trunk size (see Figure 6.1.5-1).
Figure 6.1.5-1: Canopy, Critical Root Zone, and Drip Line |
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Drip line.An area within a concentric circle having a radius extending outward from the approximate center of the tree and measuring one half (1/2) of the Tree's height (see Figure 6.1.5-1).
Multi-trunk tree.A tree with more than one trunk that has a visible connection above ground. For the purposes of measuring trunk diameter for a multi-trunk tree, the full diameter of the largest trunk shall be combined with the sum of the diameters of all other trunks divided by 2 (i.e., If the largest trunk measures 6 inches in diameter and the sum of all other trunk diameters is 12 inches, total diameter of the multi-trunk tree is 12 inches or 6+12/2).
Poisonous or hazardous materials.An object or substance with qualities harmful to Trees, including, but not limited to, paint; soil not matching the soil profile and content of the property on which the Tree sits; petroleum products, including diesel fuel, gasoline, and engine oil; concrete or stucco mix or wash; fibrous insulation; foul, brackish, or dirty water; corrosive or acidic substances or objects that may produce such substances; or any other material which may be reasonably expected to harm Trees.
Removal.Any act that has the effect of destroying a tree, including completely or partially severing the trunk of a Tree, removing more than twenty-five percent (25%) of the Canopy, or otherwise Altering a tree so that it dies or becomes fatally injured.
Tree.Any self-supporting woody perennial plant of a species that will commonly attain a trunk diameter of two (2) or more inches at a point measuring four and one-half (4-1/2) feet above ground level and an overall height of at least ten (10) feet at maturity.
Tree cluster.Three or more trees where any portion of the trunk or trunks of the trees are located less than ten (10) feet apart from one another and where each tree has a trunk measuring at least four (4) inches caliper at a point measuring four and one-half (4-1/2) feet above ground level.
Tree removal permit.A permit issued under this section that authorizes a person or entity to Remove or Alter a tree protected under this section.
Tree, heritage.Any tree of a species other than those listed in Section
6.1.4 that measures twenty-four (24) inches in caliper or greater at a point measuring four and one-half (4-1/2) feet above ground level.
Tree, protected.Any tree of a species other than those listed in Section
6.1.4 that measures four (4) inches or greater, but less than eight (8) inches in caliper at a point measuring four and one-half (4-1/2) feet above ground level.
Tree, significant.Any tree of a species other than those listed in Section
6.1.4 that measures eight (8) inches or greater, but less than twelve (12) inches in caliper at a point measuring four and one-half (4-1/2) feet above ground level.
Tree, specimen.Any tree that measures twelve (12) inches or greater, but less than twenty-four (24) inches in caliper at a point measuring four and one-half (4-1/2) feet above ground level.
(Ordinance 475 adopted 6/28/22; Ordinance 522 adopted 11/14/2023)