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HomeMy WebLinkAboutEx05_Arborist_Report 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 TO: Lafe B. Hermansen Core Design, Inc. 12100 NE 195th St Suite 300 Bothell WA 98011 REFERENCE: Pan Abode Arborist Report PROJECT SITE: 4350 Lake Washington Blvd. North Renton WA DATE: June 25, 2021 PREPARED BY: Favero Greenforest, ISA Certified Arborist # PN -0143A ISA Tree Risk Assessment Qualified ASCA Registered Consulting Arborist® #379 INTRODUCTION You contacted me and contracted my services as a consulting arborist. My assignment is to inspect trees at the above referenced site. The purpose of this report is to establish the condition of the significant trees to satisfy City of Renton permit submittal requirements. I received a topographic survey prepared by Bush, Roed & Hitchings, Inc., dated 7/17/2015. I visited the site 5/8/2019 and again 5/25/2021 and visually inspected the trees indicated on the site, which are the subject of this report. These trees represent all regulated trees on the parcel. SUMMARY Significant Trees on Site 55 Landmark Trees on Site 1 Dangerous Trees on Site 6 Total Subject Trees 62 The site is covered mostly in grass and brambles. The subject trees stand mainly at the site perimeter: along Lake Washington Blvd. N., and abutting the May Creek Park to the south. EXHIBIT 5 RECEIVED Clark Close 12/17/2021 PLANNING DIVISION DocuSign Envelope ID: AB259DAD-E1F4-4927-9B6D-D48F19435899 Lafe B. Hermansen, Core Design, Inc. RE: Arborist Report, 4350 Lake Washington Boulevard North, Renton WA June 25, 2021 Page 2 of 15 Greenforest Registered Consulting Arborist Several dead trees were assessed during the initial site inspection, and are excluded from this report and tree retention calculations. LIMITATIONS AND USE OF THIS REPORT This tree report establishes, via the most practical means available, the existing conditions of the trees on the subject property. Ratings for health and structure, as well as any recommendations are valid only through the development and construction process. This report is based solely on what is readily visible and observable, without any invasive means. There are several conditions that can affect a tree’s condition that may be pre-existing and unable to be ascertained with a visual-only analysis. No attempt was made to determine the presence of hidden or concealed conditions which may contribute to the risk or failure potential of trees on the site. These conditions include root and stem (trunk) rot, internal cracks, structural defects or construction damage to roots, which may be hidden beneath the soil. Additionally, construction and post-construction circumstances can cause a relatively rapid deterioration of a tree’s condition. IDENTIFICATION SCHEME Tree numbers shown on the attached Tree Number Exhibit are also used in the attached Significant Tree Inventory. SPECIES AND SIZE OF EACH TREE I measured the trunk diameter (54” from grade) of each tree, and identified each tree by common name. REASON(S) FOR ANY TREE REMOVAL I rated the health, structure and form of each tree (see attached inventory). Trees with significant visible problems or defects are indicated as Dangerous and are not viable for retention. Removal is recommended for 58 trees, either for health/structural reasons, or because of proposed site improvements. TREE INSPECTION METHOD – TREE HEALTH, CONDITION AND VIABILITY I visually inspected each tree from the ground. I performed a Level 1 risk assessment.1 This is the standard assessment for populations of trees near specified targets, conducted in order to identify obvious defects or specified conditions such as a pre-development inventory. This is a limited visual assessment focuses on identifying trees with imminent 1 Companion publication to the ANSI A300 Part 9: Tree Shrub and Other woody Plant Management – Standard Practices, Tree Risk Assessment. 2011. ISA. DocuSign Envelope ID: AB259DAD-E1F4-4927-9B6D-D48F19435899 Lafe B. Hermansen, Core Design, Inc. RE: Arborist Report, 4350 Lake Washington Boulevard North, Renton WA June 25, 2021 Page 3 of 15 Greenforest Registered Consulting Arborist and/or probable likelihood of failure, and/or other visible conditions that will affect tree retention. I recorded tree species and size (DBH). I estimated the average dripline of each tree. I rated the condition of each tree, both health and structure. A tree’s structure is distinct from its health. This inspection identifies what is visible with both. High-risk trees can appear healthy in that they can have a dense, green canopy. This may occur when there is sufficient sapwood or adventitious roots present to maintain tree health, but inadequate strength for structural support. Conversely, trees in poor health may or may not be structurally stable. For example, tree decline due to root disease is likely to cause the tree to be structurally unstable, while decline due to drought or insect attack may not. One way that tree health and structure are linked is that healthy trees are more capable of compensating for structural defects. A healthy tree can develop adaptive growth that adds strength to parts weakened by decay, cracks, and wounds. This report identifies unhealthy trees based on existing health conditions and tree structure, and specifies which trees are most suitable for preservation.2 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. The attached inventory summarizes my inspection results and provides the following information for each tree: Proposed Action – indicates if tree is to be removed or retained. Tree Category as defined by municipal code. (TREE: A woody perennial usually having one dominant trunk, or, for certain species, a multi-stemmed trunk system, with a potential minimum height of ten feet (10') at maturity. Dangerous: Any tree that has been certified, in a written report, as dead, terminally diseased, damaged, or otherwise dangerous to persons or property by a licensed landscape architect, or certified arborist. Landmark: A tree with a caliper of thirty inches (30") or greater. (Average multiple stems and report single integer) 2 Companion publication to the ANSI A300 Part 5: Tree Shrub and Other woody Plant Maintenance – Standard Practices, Managing Trees During Construction. 2008. ISA. DocuSign Envelope ID: AB259DAD-E1F4-4927-9B6D-D48F19435899 Lafe B. Hermansen, Core Design, Inc. RE: Arborist Report, 4350 Lake Washington Boulevard North, Renton WA June 25, 2021 Page 4 of 15 Greenforest Registered Consulting Arborist 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"). Trees qualified as dangerous shall not be considered significant. Trees planted within the most recent ten (10) years shall qualify as significant trees, regardless of the actual caliper. Reason for Removal includes dangerous trees (6) or because they conflict with proposed improvements (52). Retention Priority indicates priority number based on municipal code. Tree number as shown on tag in the field, and on attached exhibit. DBH stem diameter in inches measured 4.5 feet from the ground. Tree Species Common name. Dripline Average branch extension from the trunk as radius in feet. Health and Structure/Form ratings ‘1’ indicates good to excellent condition; no visible health-related problems or structural defects, ‘2’ indicates fair condition; minor visible problems or defects that may require attention if the tree is retained, and ‘3’ indicates poor condition; significant visible problems or defects and tree removal is recommended. Comments on Condition obvious structural defects or diseases visible at time of inspection, which includes: Asymmetric canopy - the tree has an asymmetric canopy from space and light competition from adjacent trees. Bow in trunk - a trunk lean characterized by the top of the tree leaning over. (Common with edge trees) Canker - disease cankers are established on trunk/branches. Dogleg in trunk - trunk with a bow or defective bend (90°) in trunk often half way of further up the trunk. Double leader - the tree has multiple stem attachments, which may require maintenance or monitoring over time. Included bark - an inclusion of bark at the attachment of multiple leaders that prevents a wood-to-wood attachment Lean - angle of the trunk from vertical. Multiple leaders - the tree has multiple stem attachments, which may lead to tree failure and require maintenance or monitoring over time. Previous failure - tree trunk previously broken and defective. Slender - tree lacks adequate trunk taper to stand lone. Stem Canker - disease canker on trunk/branches. Sweep in trunk - characterized by a leaning lower trunk and a more upright top. DocuSign Envelope ID: AB259DAD-E1F4-4927-9B6D-D48F19435899 Lafe B. Hermansen, Core Design, Inc. RE: Arborist Report, 4350 Lake Washington Boulevard North, Renton WA June 25, 2021 Page 5 of 15 Greenforest Registered Consulting Arborist Stumpsprout- tree previously cut at grade with multiple stems and potentially weak attachments. Suppressed - tree crowded by larger adjacent trees, with defective structure and/or low vigor. Retain tree only as a grove tree, not stand-alone. Sweep - tree leans away from adjacent trees. Characterized by a leaning lower trunk and a top that is more upright. Tree leans - trunk has significant lean from vertical. Viability - a determination by the arborist whether the tree is viable for retention. Type indicates if tree is Deciduous (D) or Evergreen (E). LIMITS OF DISTURBANCE Limits of Disturbance (LOD) are calculated for all the retained significant trees. They are listed below as radii in feet from the trunk for all sides of the tree. They are determined using rootplate 3 and trunk diameter,4,5 and ISA Best Management Practices.6 These are the minimum distances from the trees for any soil disturbance, and represent the area to be protected during construction. These LOD are malleable and may be adjusted during the design and construction process. The following table lists the limits of disturbance of each of the 6 retained trees. Limits of Disturbance in feet as radius from the base of the tree trunk. Tree Id. DBH Species DL LOD 1829 12” Red alder 15’ 8’ 1830 13” Red alder 15’ 7’ 1831 10” Red alder 15’ 6’ 1837 9” Red alder 16’ 6’ 1838 23” Bigleaf maple 35’ 15’ 1863 8” Red alder 14’ 6’ IMPACT OF NECESSARY TREE REMOVAL Removal of the 58 trees shall have no impact on the 6 retained trees. The retained trees stand at the SE corner of the site and will remain protected by trees within the park immediately to the south. 3 Coder, Kim D. 2005. Tree Biomechanics Series. University of Georgia School of Forest Resources. 4 Smiley, E. Thomas, Ph. D. Assessing the Failure Potential of Tree Roots, Shade Tree Technical Report. Bartlett Tree Research Laboratories. 5 Fite, Kelby and E. Thomas Smiley. 2009. Managing Trees During construction; Part Two. Arborist News. ISA. 6 Companion publication to the ANSI A300 Series, Part 5: Managing Trees During Construction. 2008. ISA. DocuSign Envelope ID: AB259DAD-E1F4-4927-9B6D-D48F19435899 Lafe B. Hermansen, Core Design, Inc. RE: Arborist Report, 4350 Lake Washington Boulevard North, Renton WA June 25, 2021 Page 6 of 15 Greenforest Registered Consulting Arborist TREE RETENTION PRIORITY CRITERIA Priority criteria is provided below from RMC §4-4-130H.1.b. and indicated for each regulated tree in the attached inventory. Priority One i. Landmark trees; ii. Significant trees that form a continuous canopy; iii. Significant trees on slopes greater than twenty percent (20%); iv. Significant trees adjacent to critical areas and their associated buffers; and v. Significant trees over sixty feet (60') in height or greater than eighteen inches (18") caliper. Priority Two i. Healthy tree groupings whose associated undergrowth can be preserved; ii. Other significant native evergreen or deciduous trees; and iii. Other significant non-native trees. Priority Three Alders and cottonwoods shall be retained when all other trees have been evaluated for retention and are not able to be retained, unless the alders and/or cottonwoods are used as part of an approved enhancement project within a critical area or its buffer. SUPPLEMENTAL TREES Supplemental trees are required as a result of the proposed tree removal. Replacement trees shall be at minimum 6-feet tall, each with a single, straight trunk without defect or deformity. Each tree shall have even branch distribution around and along the trunk’s axis, with a minimum 90% live crown ratio (percent of trunk with foliage-bearing branches). Deciduous trees shall be at minimum 2” caliper, with a trunk free from defect or injury, even and uniform branch distribution, and a LCR of 40% or greater. Supplemental trees shall have foliage (when present) that is normal in color and density, and/or shoot growth and bud size evident of good tree vitality. Tree planting activities shall comply with ANSI A-300 Part 6:Tree, Shrub, and Other Woody Plant Maintenance – Standard Practice (Transplanting). And shall follow ISAs Best Management Practices – Tree Planting (2005). Rootballs shall be set on undisturbed or packed soil to prevent sinking, and the rootcrowns shall be exposed prior to planting and set level with finished grade. All wires, cords and DocuSign Envelope ID: AB259DAD-E1F4-4927-9B6D-D48F19435899 Lafe B. Hermansen, Core Design, Inc. RE: Arborist Report, 4350 Lake Washington Boulevard North, Renton WA June 25, 2021 Page 7 of 15 Greenforest Registered Consulting Arborist burlap shall be removed at planting. If staking is required to keep the tree upright during establishment, all cords, stakes and wires shall be removed one year after planting. TREE RETENTION AND LAND CLEARING REGULATIONS The following pertains to the protection and preservation of 2 retained trees: 4.4.130 §H.9. Protection Measures During Construction: Protection measures in this subsection shall apply for all trees that are to be retained. All of the following tree protection measures shall apply: a. Construction Storage Prohibited: The applicant may not fill, excavate, stack or store any equipment, dispose of any materials, supplies or fluids, operate any equipment, install impervious surfaces, or compact the earth in any way within the area defined by the drip line of any tree to be retained. b. Fenced Protection Area Required: Prior to development activities, the applicant shall erect and maintain six-foot (6') high chain link temporary construction fencing around the drip lines of all retained trees or at a distance surrounding the tree equal to one and one-quarter feet (1.25') for every one inch (1") of trunk caliper, whichever is greater, or along the perimeter of a tree protection tract. Placards shall be placed on fencing every fifty feet (50') indicating the words, “NO TRESPASSING – Protected Trees,” or on each side of the fencing if less than fifty feet (50'). Site access to individually protected trees or groups of trees shall be fenced and signed. Individual trees shall be fenced on four (4) sides. In addition, the applicant shall provide supervision whenever equipment or trucks are moving near trees. c. Protection from Grade Changes: If the grade level adjoining to a tree to be retained is to be raised, the applicant shall construct a dry rock wall or rock well around the tree. The diameter of this wall or well must be equal to the tree’s drip line. d. Impervious Surfaces Prohibited within the Drip Line: The applicant may not install impervious surface material within the area defined by the drip line of any tree to be retained. e. Restrictions on Grading within the Drip Lines of Retained Trees: The grade level around any tree to be retained may not be lowered within the greater of the following areas: (i) the area defined by the drip line of the tree, or (ii) an area around the tree equal to one and one-half feet (1-1/2') in diameter for each one inch (1") of tree caliper. A larger tree protection zone based on tree size, species, soil, or other conditions may be required. (Ord. 5676, 12-3-2012) f. Mulch Layer Required: All areas within the required fencing shall be covered completely and evenly with a minimum of three inches (3") of bark mulch prior to installation of the protective fencing. Exceptions may be approved if the mulch will adversely affect protected ground cover plants. (Ord. 5676, 12-3- 2012) DocuSign Envelope ID: AB259DAD-E1F4-4927-9B6D-D48F19435899 Lafe B. Hermansen, Core Design, Inc. RE: Arborist Report, 4350 Lake Washington Boulevard North, Renton WA June 25, 2021 Page 8 of 15 Greenforest Registered Consulting Arborist g. Monitoring Required during Construction: The applicant shall retain a certified arborist or licensed landscape architect to ensure trees are protected from development activities and/or to prune branches and roots, fertilize, and water as appropriate for any trees and ground cover that are to be retained. h. Alternative Protection: Alternative safeguards may be used if determined to provide equal or greater tree protection. (Ord. 5676, 12-3-2012) ATTACHMENTS: 1. Assumptions and Limiting Conditions 2. Certification of Performance 3. Significant Tree Inventory 4. Tree Retention Plan DocuSign Envelope ID: AB259DAD-E1F4-4927-9B6D-D48F19435899 Lafe B. Hermansen, Core Design, Inc. RE: Arborist Report, 4350 Lake Washington Boulevard North, Renton WA June 25, 2021 Page 9 of 15 Greenforest Registered Consulting Arborist Attachment No. 1 - Assumptions & Limiting Conditions 1. A field examination of the site was made 5/8/2019 & 5/25/2021. My observations and conclusions are as of these dates. 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. I am not a qualified land surveyor. Reasonable care was used to match the trees indicated on the sheets with those growing in the field. 4. Construction activities can significantly affect the condition of retained trees. All retained trees should be inspected after construction is completed, and then inspected regularly as part of routine maintenance. 5. Unless stated other wise: 1) information contained in this report covers only those trees that were examined and reflects the condition of those trees at the time of inspection; and 2) the inspection is limited to visual examination of the subject trees without dissection, excavation, probing, or coring. There is no warranty or guarantee, expressed or implied that problems or deficiencies of the subject tree may not arise in the future. 6. All trees possess the risk of failure. Trees can fail at any time, with or without obvious defects, and with or without applied stress. A complete evaluation of the potential for this (a) tree to fail requires excavation and examination of the base of the subject tree. Permission of the current property owner must be obtained before this work can be undertaken and the hazard evaluation completed. 7. 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. DocuSign Envelope ID: AB259DAD-E1F4-4927-9B6D-D48F19435899 Lafe B. Hermansen, Core Design, Inc. RE: Arborist Report, 4350 Lake Washington Boulevard North, Renton WA June 25, 2021 Page 10 of 15 Greenforest Registered Consulting Arborist Attachment No. 2 - Certification of Performance I, Favero Greenforest, certify that: •I have personally inspected the trees and the property referred to in this report and have stated my findings accurately. •I have no current or prospective interest in the vegetation or the property that is the subject of this report and have no personal interest or bias with respect to the parties involved. •The analysis, opinion, and conclusions stated herein are my own and are based on current scientific procedures and facts. •My analysis, opinion, and conclusions were developed and this report has been prepared according to commonly accepted arboricultural practices. •No one provided significant professional assistance to me, except as indicated within the report. •My compensation is not contingent upon the reporting of a predetermined conclusion that favors the cause of the client of any other party nor upon the results of the assessment, the attainment of stipulated results, or the occurrence of any subsequent events. I further certify that I am a member in good standing of International Society of Arboriculture (ISA), and the ISA PNW Chapter, I am an ISA Certified Arborist (#PN-0143A) and am Tree Risk Assessment Qualified, and am a Registered Consulting Arborist® (#379) with American Society of Consulting Arborists. I have worked as an independent consulting arborist since 1989. Signed: GREENFOREST, Inc. By Favero Greenforest, M. S. Date: June 25, 2021 Favero Greenforest Digitally signed by Favero Greenforest DN: cn=Favero Greenforest, o, ou, email=greenforestinc@mindspring.co m, c=US Date: 2021.06.28 10:01:26 -07'00' DocuSign Envelope ID: AB259DAD-E1F4-4927-9B6D-D48F19435899 Lafe B. Hermansen, Core Design, Inc. RE: Arborist Report, 4350 Lake Washington Boulevard North, Renton WA June 25, 2021 Page 11 of 15 Greenforest Registered Consulting Arborist Dripline radius from center of tree Condition ratings ‘1’ good to excellent, ‘2’ fair, ‘3’ poor Type indicates if tree is Deciduous (D) or Evergreen (E) Attachment No. 3 – Tree Inventory Proposed Action Category Reason for Removal Retention Priority TREE ID DBH (In.) Species Dripline (R’) Health Structure Comments on Condition Viable Tree Tree Type Remove Significant Pro. Imp. 3 1318 16 Red alder 14 1 2 Asymmetric canopy Yes D Remove Dangerous Danger 1319 8 Red alder 12 1 3 Dogleg, canker No D Remove Significant Pro. Imp. 1.ii 1509 8,8 Bigleaf maple 14 2 2 Decline, double leader Yes D Remove Dangerous Danger 1510 7,8,8 Bigleaf maple 16 2 3 Decline, stumpsprout No D Remove Significant Pro. Imp. 3 1512 16 Black cottonwood 18 1 2 Asymmetric Yes D Remove Significant Pro. Imp. 3 1514 15 Black cottonwood 16 1 2 Asymmetric canopy Yes D Remove Significant Pro. Imp. 3 1515 26 Black cottonwood 20 1 1 Yes D Remove Significant Pro. Imp. 3 1516 13 Black cottonwood 14 1 2 Asymmetric Yes D Remove Significant Pro. Imp. 3 1517 15, 18 Black cottonwood 20 1 2 Double leader Yes D Remove Dangerous Danger 1518 14 Black cottonwood 16 1 3 Sweep, dogleg, leans on building No D Remove Significant Pro. Imp. 3 1519 12 Black cottonwood 16 1 2 Asymmetric Yes D Remove Significant Pro. Imp. 3 1520 17 Black cottonwood 16 1 1 Yes D Remove Significant Pro. Imp. 1.ii 1521 9 European birch 12 1 2 Bow Yes D Remove Significant Pro. Imp. 1.ii 1523 6 European birch 14 1 2 Bow Yes D Remove Significant Pro. Imp. 3 1527 15 Black cottonwood 18 1 2 Asymmetric Yes D Remove Significant Pro. Imp. 3 1528 15 Black cottonwood 18 1 2 Asymmetric Yes D Remove Significant Pro. Imp. 3 1530 15 Black cottonwood 16 1 2 Asymmetric Yes D DocuSign Envelope ID: AB259DAD-E1F4-4927-9B6D-D48F19435899 Lafe B. Hermansen, Core Design, Inc. RE: Arborist Report, 4350 Lake Washington Boulevard North, Renton WA June 25, 2021 Page 12 of 15 Greenforest Registered Consulting Arborist Proposed Action Category Reason for Removal Retention Priority TREE ID DBH (In.) Species Dripline (R’) Health Structure Comments on Condition Viable Tree Tree Type Remove Significant Pro. Imp. 3 1531 10 Black cottonwood 14 1 2 Slender Yes D Remove Significant Pro. Imp. 3 1533 11 Black cottonwood 14 1 2 Asymmetric Yes D Remove Significant Pro. Imp. 3 1534 21 Black cottonwood 18 1 2 Asymmetric Yes D Remove Significant Pro. Imp. 3 1536 10 Black cottonwood 14 1 1 Yes D Remove Significant Pro. Imp. 3 1537 20 Black cottonwood 20 1 1 Yes D Remove Significant Pro. Imp. 3 1539 23 Black cottonwood 18 1 1 Yes D Remove Significant Pro. Imp. 3 1540 29 Black cottonwood 20 1 2 Asymmetric Yes D Remove Significant Pro. Imp. 3 1541 18 Black cottonwood 16 1 2 Asymmetric Yes D Remove Significant Pro. Imp. 3 1542 19 Black cottonwood 18 1 2 Asymmetric Yes D Remove Landmark Pro. Imp. 1.i 1545 35 Black cottonwood 25 1 1 Yes D Remove Significant Pro. Imp. 3 1746 10 Black cottonwood 16 1 2 Sweep Yes D Remove Significant Pro. Imp. 3 1747 13 Black cottonwood 16 1 2 Asymmetric Yes D Remove Significant Pro. Imp. 3 1749 9 Black cottonwood 14 1 2 Asymmetric, bow Yes D Remove Significant Pro. Imp. 3 1750 19 Black cottonwood 16 1 2 Asymmetric Yes D Remove Significant Pro. Imp. 3 1751 9 Black cottonwood 16 1 2 Asymmetric Yes D Remove Significant Pro. Imp. 3 1784 9 Black cottonwood 12 1 2 Slender Yes D Remove Dangerous Danger 1785 12 Black cottonwood 14 1 3 Suppressed, dogleg No D Remove Significant Pro. Imp. 3 1786 23 Black cottonwood 20 1 1 Yes D Remove Significant Pro. Imp. 3 1787 22, 22 Black cottonwood 25 1 2 Double leader, included bark Yes D Remove Significant Pro. Imp. 3 1788 8 Red alder 12 1 2 Asymmetric Yes D Remove Significant Pro. Imp. 3 1789 9 Black cottonwood 14 1 2 Slender Yes D DocuSign Envelope ID: AB259DAD-E1F4-4927-9B6D-D48F19435899 Lafe B. Hermansen, Core Design, Inc. RE: Arborist Report, 4350 Lake Washington Boulevard North, Renton WA June 25, 2021 Page 13 of 15 Greenforest Registered Consulting Arborist Proposed Action Category Reason for Removal Retention Priority TREE ID DBH (In.) Species Dripline (R’) Health Structure Comments on Condition Viable Tree Tree Type Remove Significant Pro. Imp. 3 1792 16 Red alder 16 2 1 Decline Yes D Remove Dangerous Danger 3 1793 11 Red alder 14 3 3 Trunk decay No D Remove Significant Pro. Imp. 3 1822 14 Red alder 16 1 1 Yes D Remove Significant Pro. Imp. 3 1824 8,10 Red alder 14 1 2 Double leader Yes D Remove Significant Pro. Imp. 3 1825 10,12 Red alder 18 1 2 Double leader Yes D RETAIN Significant 3 1829 12 Red alder 15 1 2 Asymmetric Yes D RETAIN Significant 3 1830 13 Red alder 15 1 2 Asymmetric Yes D RETAIN Significant 3 1831 10 Red alder 15 1 2 Asymmetric Yes D RETAIN Significant 3 1837 9 Red alder 16 1 2 Asymmetric, sweep Yes D RETAIN Significant 1.ii, iii, iv 1838 23 Bigleaf maple 35 1 1 Yes D RETAIN Significant 3 1863 8 Red alder 14 1 2 Sweep Yes D Remove Significant Pro. Imp. 3 1975 8 Black cottonwood 10 1 1 Yes D Remove Dangerous Danger 100000 11 Douglas-fir 14 3 1 Nearly dead No E Remove Significant Pro. Imp. 1.ii, iii 100001 15 Douglas-fir 16 1 1 Yes E Remove Significant Pro. Imp. 1.ii, iii 100002 17 Douglas-fir 18 1 1 Yes E Remove Significant Pro. Imp. 1.ii, iii 100003 19 Douglas-fir 18 1 2 Asymmetric Yes E Remove Significant Pro. Imp. 1.ii, iii 100004 16 Douglas-fir 18 1 2 Asymmetric Yes E Remove Significant Pro. Imp. 1.ii, iii 100008 22 Bigleaf maple 25 1 1 Yes D Remove Significant Pro. Imp. 1.ii, iii 100009 16 Douglas-fir 14 1 1 Yes E Remove Significant Pro. Imp. 2.ii 100031 9 Black Pine 12 1 2 Double leader Yes E Remove Significant Pro. Imp. 3 100032 10 Red alder 16 1 2 Asymmetric Yes D Remove Significant Pro. Imp. 3 100033 10 Red alder 16 1 2 Asymmetric Yes D DocuSign Envelope ID: AB259DAD-E1F4-4927-9B6D-D48F19435899 Lafe B. Hermansen, Core Design, Inc. RE: Arborist Report, 4350 Lake Washington Boulevard North, Renton WA June 25, 2021 Page 14 of 15 Greenforest Registered Consulting Arborist Proposed Action Category Reason for Removal Retention Priority TREE ID DBH (In.) Species Dripline (R’) Health Structure Comments on Condition Viable Tree Tree Type Remove Significant Pro. Imp. 3 100034 11 Red alder 16 1 2 Asymmetric Yes D Remove Significant Pro. Imp. 3 100035 8, 10 Red alder 14 1 2 Sweep Yes D 55 Significant 1 Landmark 6 Dangerous 62 TOTAL 6 Retain 56 Remove 62 TOTAL DocuSign Envelope ID: AB259DAD-E1F4-4927-9B6D-D48F19435899 1ROW DEDICATION1307130813091310131113121313131413151316131713181319150915101511151215131514151515161517151815191520152115221523152415251526152715281529153015311532153315341535153615371539154015411542154517461747174817491750175117561757175817591760176117651766176717681770177117721773177617781779178017841785178617871788178917901791179217931822182318241825182918301831183718381849185018511852185318541855185618591860186118621863186419321964197523582359248024812482248324841000001000011000021000031000041000051000061000071000081000091000101000111000121000131000151000161000171000181000191000201000211000221000231000241000251000261000271000281000291000306/23/2021 4:26 PMJ:\2019\19030\LANDSCAPE\PRELIMINARY\SHEETS\19030 L1.01.DWG IN COMPLIANCE WITH CITY OF RENTON STANDARDSDESIGN12100 NE 195th St, Suite 300 Bothell, Washington 98011 425.885.7877CIVIL ENGINEERINGLANDSCAPE ARCHITECTUREPLANNINGSURVEYINGKENNYDALE GATEWAYKENNYDALE GATEWAY KENNYDALE GATEWAY 4350 LAKE WASHINGTON BLVD N, RENTON, WA 98056LANDMARK TREE TO BE REMOVEDSIGNIFICANT TREE TO BE REMOVEDSIGNIFICANT TREE TO REMAINLEGENDEXISTING SIGNIFICANTTREE TO REMAIN (TYP.),TREE RETENTION SUMMERYTREE RETENTION NOTESTREE RETENTION PLANL1.01EXISTING SIGNIFICANT TREETO BE REMOVED (TYP.)OFF-SITE TREE (TYP.)NON-REGULATED TREE (TYP.)EXISTING LANDMARK TREETO BE REMOVEDPROPERTY LINE (TYP.)NON-REGULATED TREE (TO BE REMOVED)TOTAL NUMBER OF VIABLE TREES IN DEVELOPABLE AREA*:38REQUIRED NUMBER OF TREES TO REMAIN(10%, PER RMC4-4-130.H.1.iii, FOR COMMERCIAL ZONES): 4PROPOSED NUMBER OF TREES TO REMAIN: 6REQUIRED NUMBER OF REPLACEMENT TREES: 0* TREES IN POOR HEALTH AND PUBLIC STREETS ARE EXCLUDED. SEETREE RETENTION WORKSHEET FOR DETAILS ON CALCULATION. SEEARBORIST REPORT FOR DETAILED TREE INFORMATION.1. SEE ABORIST REPORT FOR ADDITIONAL DETAILS REGARDING TREEDESCRIPTIONS & CONDITIONS.2. OFF-SITE TREES ARE SHOWN ONLY FOR PROTECTION OF EACH TREE. THELOCATION AND SIZE OF THE TREES ARE FOR REFERENCE ONLY.OFFSITE TREE (TO REMAIN, LOCATION ANDDRIPLINE ARE SHOWN FOR PROTECTION DURINGCONSTRUCTION ACTIVITIES)R.O.W. DEDICATION (TYP.)TREE INVENTORYLafe B. Hermansen, Core Design, Inc. RE: Arborist Report, 4350 Lake Washington Boulevard North, Renton WA June 25, 2021 Page 15 of 15 Attachment No. 4 – Tree Retention Plan DocuSign Envelope ID: AB259DAD-E1F4-4927-9B6D-D48F19435899