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Home My WebLink About18-R-Arborist-2015-10-14-Greenforest Inc Greenforest Incorporated C o n s u l t i n g A r b o r i s t 4547 South Lucile Street, Seattle, WA 98118 Tel. 206-‐723-‐0656 October 14, 2015 Kent Khnor 26721 106th Ave SW Kent WA 98030 RE: Arborist Report, Boun Short Plat, Parcel No. 1023059139 You contracted my services as a consulting arborist. My assignment is to: 1. Inspect and inventory 5 significant trees as shown on preliminary tree retention plan. 2. Confirm significant tree quantity on site. 3. Record tree species, diameter, dripline and visible defects. 4. Assess tree health and structure. 5. Prepare a written report of findings. I received a preliminary tree retention plan from Ivana Halvorsen, of Barghausen Consulting Engineers, Inc., locating 5 significant trees. I visited the site 10/6/15 and performed a field inspection. The site is flat and covered mostly in unmanaged brambles. I inspected the 5 surveyed trees plus an additional 2 trees of significant size, which are the subject of this report. Six of the 7 trees are Douglas-‐fir, and range in size from 6 to 30 inches DBH. The seventh tree is a red alder. TREE INSPECTION – Tree Health, Condition and Viability I marked each tree with 1” x 3.5” aluminum tag indicating tree number. I visually inspected each tree from the ground and rated both tree health and structure. A tree’s structure is distinct from its health. This inspection identifies what is visible with both. Structure is the way the tree is put together or constructed, and identifying obvious defects can be helpful in determining if a tree is predisposed to failure. Tree health assesses disease, insect infestation and old age. No invasive procedures were performed on any trees. The results of this inspection are based on what was visible at the time of the inspection. Kent Khnor RE: Arborist Report, Boun Short Plat, Parcel No. 1023059139 October 14, 2015 Page 2 of 7 Greenforest Registered Consulting Arborist The table below summarizes my inspection results and provides the following information for each tree: Tree number as shown on tag in the field. Tree Species Common name. DBH Stem diameter in inches measured 4.5 feet from the ground. Dripline Average branch extension from the trunk as radius in feet. Tree Class Tree, Significant: A tree with a caliper of at least six inches (6"), or an alder or cottonwood tree with a caliper of at least eight inches (8"). Tree, Landmark: A tree with a caliper of thirty inches (30") or greater. Tree Status Indicates if tree will be saved or removed. Dangerous, Dead Or Viable? Tree, Dangerous: Any tree that has been certified as dead, terminally diseased, damaged, or otherwise dangerous to persons or property by a licensed landscape architect, or certified arborist, and for healthy trees, a determination by the arborist whether the tree is viable for retention. Visible defects Obvious structural defects or diseases visible at time of inspection. One tree has been injured repeatedly with a hatchet. Its trunk is wounded and it is the only tree not viable for retention. A couple dozen red alders are growing along the east side of the site, though only 1 is of significant size. Tree No. Species DBH Dripline Tree Class Status: Save Or Remove Dangerous, Dead Or Viable? Visible Defects 1 Douglas-‐fir 20” 14' Significant Remove Dangerous Hatchet injury on trunk; sequoia pitch moth infestation. 2 Douglas-‐fir 16” 12’ Significant Remove Viable 3 Douglas-‐fir 12” 16’ Significant Remove Viable 4 Douglas-‐fir 30” 18’ Landmark Remove Viable 5 Douglas-‐fir 28” 16’ Significant Remove Viable 6 Douglas-‐fir 6” 6’ Significant Remove Viable 7 Red alder 9” 12’ Significant Remove Viable Kent Khnor RE: Arborist Report, Boun Short Plat, Parcel No. 1023059139 October 14, 2015 Page 3 of 7 Greenforest Registered Consulting Arborist Minimum Tree Density For detached single-‐family development, two (2) significant trees are required for every five thousand (5,000) sq. ft. of lot area, or the gross equivalent of caliper inches provided by one (1) or more retained tree. Since no trees are retained, supplemental trees are necessary to meet the minimum tree density requirement. The following table lists the proposed 7 lots by number, size (SF), minimum significant tree requirement, new trees proposed for each Lot, retained trees on each Lot, and compliance with the minimum tree density requirement. Fifteen supplemental trees are required for compliance. Lot Size (SF) Min. Significant Trees Required New Trees1 Retained Trees Compliant 1 5002 2 2 0 Yes 2 5741 2 2 0 Yes 3 5890 2 2 0 Yes 4 6075 2 2 0 Yes 5 5658 2 2 0 Yes 6 5657 2 2 0 Yes 7 6453 3 3 0 Yes The project landscape architect shall address location, species, planting and maintenance specifications for supplemental trees under separate cover. The smaller Doug-‐firs and alder trees proposed for removal stand alone on this parcel (1, 2, 3, 6, 7,). Only smaller trees and brambles surround them. There are no nearby trees that will remain, either on this site or on adjoining parcels that could be impacted by their removal. The two trees within the right-‐of-‐way are edge trees (4, 5), and have been pruned heavily because of adjacent overhead power lines. East of these two trees is a stand of other mature Douglas-‐fir on the adjoining parcels. Although all these trees are in a contiguous canopy group, they have sufficient spacing to allow good trunk taper and moderate live crown ratios. Further, mature trees across the street to the west will continue to provide wind buffer. The impact to adjacent trees will be negligible to minor from the removal of the two ROW trees. 1 When the required number of protected trees cannot be retained, replacement trees, with at least a two-‐inch (2") caliper or an evergreen at least six feet (6') tall, shall be planted. Kent Khnor RE: Arborist Report, Boun Short Plat, Parcel No. 1023059139 October 14, 2015 Page 4 of 7 Greenforest Registered Consulting Arborist Thank you for your business. Please let me know if you have any questions. Sincerely, GreenForest, Inc. By Favero Greenforest, M. S. ISA Certified Arborist # PN -‐0143A ASCA Registered Consulting Arborist® #379 ISA Tree Risk Assessment Qualified Attachments: 1. Assumptions and Limiting Conditions 2. Color Images of Site 3. Site Plan Kent Khnor RE: Arborist Report, Boun Short Plat, Parcel No. 1023059139 October 14, 2015 Page 5 of 7 Greenforest Registered Consulting Arborist Attachment No. 1 -‐ Assumptions & Limiting Conditions 1) A field examination of the site was made 10/6/15. My observations and conclusions are as of that date. 2) Care has been taken to obtain all information from reliable sources. All data has been verified insofar as possible; however, the consultant/arborist can neither guarantee nor be responsible for the accuracy of information provided by others. 3) The consultant/appraiser shall not be required to give testimony or to attend court by reason of this report unless subsequent contractual arrangements are made. 4) Loss or alteration of any part of this report invalidates the entire report. 5) Unless required by law otherwise, possession of this report or a copy thereof does not imply right of publication or use for any purpose by any other than the person to whom it is addressed, without the prior expressed written or verbal consent of the consultant/appraiser. 6) This report and any values/opinions expressed herein represent the opinion of the consultant/appraiser, and the consultant’s/appraiser’s fee is in no way contingent upon the reporting of a specified value, a stipulated result, the occurrence of a subsequent event, nor upon any finding to be reported. 7) Construction activities can impact trees in unpredictable ways. All retained trees should be inspected at the competition of construction, and regularly thereafter as part of ongoing maintenance. Kent Khnor RE: Arborist Report, Boun Short Plat, Parcel No. 1023059139 October 14, 2015 Page 6 of 7 Greenforest Registered Consulting Arborist Attachment No. 2 – Color Images of Site BOUN SHORT PLAT BOUN SHORT PLATKent Khnor RE: Arborist Report, Boun Short Plat, Parcel No. 1023059139 October 14, 2015 Page 7 of 7 Attachment No. 3 – Site Plan