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? Definitions bein� added or amended: 2 Arborist, Certified � An individual who holds a current certification frorre the International 3 SocieryofArboriculture. 4 Caliper Inch— The standard of �tree trunk measurement. for replacement or landscaping trees. The 5 caliper inch measurement of the trunk shall be taken at six (6) inches above the ground for trees 6 up to and including four (4) inch caliper size, and twelve (12) inches above the grountl for trees larger than four (4) inch caliper. Diameter Breast Height (DBH) — The diameter of trees at fireast height, rreeasured 4`/z feet (54 inches) above the ground. The diameter of a multi-stemmed tree that splits below 4. S feet shall be 1 measured at the smallest diameter below the split for� both deciduous and coniferous trees. ' 1 Dripline — A vertical line extending from the outer surface of a tree's firanch tips down to the _ ground. 13 Forester, Degreed — A person who holds a minimum of a Baehelor of Science degree in 14 arboriculture, urban forestry or similar field from an accredited academic institution. 15 Tree — A self-supporting woody perennial having one or several self-supporting stems or trunks 16 and numerous branches which normally attains an overall height of75 feet at maturiry. Trees 1 may be classified as deciduous or coniferous. 1 Tree, Invasive — Any tree species that is not native to Minnesota or its regional ecosystem that 1 can spread or be spread into any non-cultivated soil site and establish itself, expanding the plant 2 species' population by its own volition anc� generally harm, c�estroy or prevent native plants. Z� Inva.rive tree species include Norway Maple, Black Locust, Arreur Maple, Siberian Elm, and 22 Buckthorn. 23 Tree, Coniferous/Evergreen Tree — A woody plant having, foliage on the outerrrcost portions of 24 the branches year-round which at maturity i.s at least twelve (12) feet or more in height. 25 Tamaracks and Larch are included as coniferous tree species. 7_6 Tree, Deciduous — A woody plant, which sheds leaves annually, having a defined crown and at 2 maturity as at least fzfteen (I S) feet or more in height. 2 Tree Protection Zone — An area around a tree defined by either the tree's uniyue dripline, or the 2 tree's typical root protection zone. Typical Root Protection Zone � A circle radius around a tree in feet equal to 1.25 time.s the tree's � 9 diameter breast height for both deciduous antl coniferous trees. JL Attachment D Comment [BGAl]: To ensure only qualified individuals are pxeparing tree preservatiou plans, we have now defined "certified arboiist' and "degreed forester." Comment [BGA2]: A definition for `dripline" has now been added as we allow applicants, at their discretion, to require a greater protectioi� zone via dripline if they so choose to do so. Comment [BGA3]: By creating a "typieaP' root pmtection zoue, we establish a systcm where MOST trees will be fully protected. Individual trees and species types may have root zones chat protrude further than this standard, but completing individual assessments on a per tree basis can place a large financia] burden on an applicant. As this ordinance will impact individual properry owners and notjust deep pocket developers, instituting a reasonable approach was our goaL Note that many communiSies use a 1:1 ratio, and some use a 1: 1.5; we have chosen this intermediate ratio, but would also support an increase to 1.5 lo be more conservative. S&S believes eitlier will work (with 1.5 obviously providing additional �roLcction). Should an applicant wish to be MORE proteetive, this ordinance would allow them to utilize driplines to define protection boundaries, but in no instance would a protection zone be any Iess thao the defined Typical Root Protection Zone.