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HomeMy WebLinkAboutTR_Tree_Assessment_Report_241117_v1.pdf Tree Assessment for Homestead Community Land Trust at Willowcrest Townhomes II 1132 Edmonds Ave NE Renton, Washington Date November 17, 2024 Homestead – Willowcrest Townhomes II – Tree Assessment November 17, 2024 ArborInfo LLC Page 2 Table of Contents 1. Introduction ............................................................................................................... 3 2. Competence ............................................................................................................... 3 3. Client ........................................................................................................................ 3 4. Assignment, Purpose and Use of Report ........................................................................ 3 5. Limits of Assignment .................................................................................................. 3 6. Site Description .......................................................................................................... 4 7. Methodology ............................................................................................................. 4 8. Tree Description ......................................................................................................... 5 9. Discussion ................................................................................................................. 5 10.Tree Replacement ...................................................................................................... 5 11.Tree Protections: ....................................................................................................... 6 11. Assumptions and Limiting Conditions ........................................................................ 6 List of Tables 1- Root Zone Impacts …………………….….….6 Addenda I. Tree Assessment Summary Table II. Tree Location Plan III. Proposed Site Development Plan Homestead – Willowcrest Townhomes II – Tree Assessment November 17, 2024 ArborInfo LLC Page 3 1. Introduction I was contacted by Third Place Design to inventory, describe and assess the condition of trees at 1132 Edmonds, Ave. NE Renton, Washington. This report summarizes my observations and conclusions in compliance with Renton Code Chapter 4-4-130 Tree Retention and Land Clearing Regulations. 2. Competence • Seattle Tree Service Provider LIC TSP 18851 • Certified Arborist (International Society of Arboriculture) #23136, PN 0426A) • Registered Consulting Arborist (American Society of Consulting Arborists #499). • Tree Risk Assessment Qualified (ISA) -1/22/2026. • Certified forester (Society of American Foresters #951) • Bachelor of Science degree in Forest Management from the University of Washington • Practicing Consulting Forester since 1971 and Consulting Arborist since 1985 3. Client The client to whom this report is addressed is: Homestead Community Land Trust c/o Eric Pravis, Director of Development 412 Maynard Ave, #201 Seattle, WA 98104 c/o Brent Chastain Third Place Design 4. Assignment, Purpose and Use of Report The assignment is to inventory, describe and assess the condition of onsite and offsite trees potentially affected by proposed development activities on the subject property and to prepare a tree protection plan for those to be retained in compliance with Renton City Code 4-4-130. 5. Limits of Assignment The assignment is limited to the information gathered during the site visit November 14, 2024 (date of assessment) and references noted in this report. No excavation or sampling was undertaken to determine unseen defects. No inspection of trees not reported herein was made. Homestead – Willowcrest Townhomes II, Renton, WA Tree Assessment November 14, 2024 ArborInfo LLC Page 4 A site plan showing the location of trees was provided and found in Addendum II indicating the onsite tree numbers and locations. An outline of site development was also provided in Addendum III that indicates the locations of five Townhomes. 6. Site Description The subject property is currently undeveloped with no improvements. King County Parcel No. 943280-0130consists of 140,096 square feet (0.921 Ac) The lot slopes westerly down to Edmonds Ave NE. 7. Methodology Assessed significant trees are as follows from Code chapter 4-4-130 Y.4 Tree, Significant: A tree with a caliper of at least six inches (6"), except alder or cottonwood trees, which qualify as significant trees with a caliper of eight inches (8") or greater. Trees certified as high-risk shall not be considered significant. Each on-site significant tree was measured or estimated for diameter at 4.5-feet above ground, total height, percentage of live green crown, dripline (extent of live limbs) and condition and identified on site with a numbered aluminum tag. No offsite trees that would potentially be affected by the development were found. I examined the trees to the standards of the International Society of Arboriculture (ISA) level 2 TRAQ assessment. (Tree Risk Assessment Qualified) Homestead – Willowcrest Townhomes II, Renton, WA Tree Assessment November 14, 2024 ArborInfo LLC Page 5 TRAQ Level 2 Assessment • Locate and Identify Subject Trees • Assess Tree Health, Structural Issues --Vigor • Inspect: ocular, mallet, probes etc. • Record Observations: defects, site conditions, growth rates • Determine the Likelihood and consequences of failure • Determine Level of Risk of Failure • Assess Long Term Viability A summary Tree Assessment Form is found in Addendum I that provides information for each tree. The tree locations are found in Addendum II No offsite trees potentially affected by site redevelopment were found. Note that some trees were not tagged as they could not be accessed due either to heavy blackberry cover or were behind chain link fences that could not be opened. 8. Tree Description On site trees total 38 significant and include four landmark trees No. 28, 34, 35 and 36. (note that trees 35 and 36 may actually be one tree joined at the base but lack of access prevented examination). Refer to the attached Tree Assessment Summary Form in Addendum I. I have calculated the “Tree Credits” for the viable, non-hedge on-site trees as required by the City code table 4-4-130.H.1.b.v following: (30 tree credits per acre are required). 40,046 sq. ft/43,560 =0.921 acres 0.921 ac x 30 tree credits/acre = 27.63 (28) tree credits required The total tree credit calculation for the significant trees is 249. The proposal is to remove all but tree No. 31 at 8 credits. Tree removal replacement by planting is 20 credits required. 9. Discussion 10.Tree Replacement The following are excerpts from City Code 4-22-200 H.b. iii. Supplemental tree planting shall consist of new small, medium, or large species trees, as defined in RMC 4-11-200, Definitions T. The supplemental trees shall be planted with a minimum size of two-inch (2") caliper, or evergreen trees Homestead – Willowcrest Townhomes II, Renton, WA Tree Assessment November 14, 2024 ArborInfo LLC Page 6 with a minimum size of six feet (6') tall. The Administrator shall have the authority to approve, deny, or restrict the tree species for proposed supplemental trees. 5. Tree, Small Species: A tree with a mature height of thirty feet (30') or less. 6. Tree, Medium Species: A tree with a mature height between thirty feet (30') and fifty feet (50'). 7. Tree, Large Species: A tree with a mature height of fifty feet (50') or more. Replacement tree species, sizes and planting locations are to be determined by the project landscape architect. 11.Tree Protections: Retained tree Protections are detailed in Code Chapter 4-4-H.10 and summarized following. a. Temporary fencing required b. Signage required on fencing c. Construction storage prohibited within the tree dripline (extent of longest live limbs) d. No grade changes within the dripline e. No impervious material to be placed within the dripline f. No utilities to be installed within the dripline without City approval g. On grading permitted with in the dripline or within in 1.5 feet of tree diameter h. Native under vegetation to be protected i. An ISA or ASCA certified arborist to be retained to provide pruning, root protection and other safeguards j. Retained and replacement trees to be maintained in perpetuity k. Retained trees to be pruned and trimmed to prevent limb failure l. High risk trees to be removed and replaced 11. Assumptions and Limiting Conditions 1. Any legal description provided to the consultant is assumed to be correct. Ownership of the subject trees as provided by the client is assumed to be correct. No responsibility is assumed for legal matters. No opinion as to the property line location is made. 2. Care has been taken to obtain all information from reliable sources. The consultant can neither guarantee nor be responsible for the accuracy of information provided by others. 3. The consultant shall not be required to give testimony or attend court by reason of this report unless subsequent contractual arrangements are made, including additional fees. Homestead – Willowcrest Townhomes II, Renton, WA Tree Assessment November 14, 2024 ArborInfo LLC Page 7 4. This report and any values expressed herein represent the opinion of the consultant, and the consultant’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. 5. The exhibits in this report are included to assist the reader and are not necessarily to scale. 6. Unless expressed otherwise, information in this report covers only items that were examined, and reflects the condition of those items at the time of inspection. The subject site was cleared of all vegetation at the time of inspection therefore the extent of removals is inferred from adjacent undisturbed areas. The inspection is limited to visual examination of accessible portions of the trees and plants. 7. Loss or alteration of any part of the report invalidates the entire report. Ownership of any documents related to this report passes to the client only. 8. The liability of ArborInfo LLC its contractors and employees is limited to the client only and only up to the amount of the fee actually received for the assignment. 9. There is no warranty suggested for any of the trees subject to this report. Weather, latent tree conditions, and future man-caused activities could cause physiologic changes and deteriorating tree condition. Over time, deteriorating tree conditions may appear and there may be conditions, which are not now visible which, could cause tree failure. This report or the verbal comments made at the site in no way warrant the structural stability or long-term condition of any tree, but represent my opinion based on the observations made. 10. NEARLY ALL TREES IN ANY CONDITION STANDING WITHIN REACH OF IMPROVEMENTS OR HUMAN USE AREAS REPRESENT HAZARDS THAT COULD LEAD TO DAMAGE OR INJURY. THE ASSESSMENT IS VALID FOR TWO YEARS FROM THE DATE OF INSPECTION, ONLY. 11. PERTINENT JURISDICTION RULES AND REGULATIONS SHOULD BE CONSULTED PRIOR TO THE REMOVAL OF ANY TREE. Respectfully Submitted, Thomas M. Hanson, CA 23136, RCA 499 TRAQ to 1/22/2026 PN 0426A Homestead – Willowcrest Townhomes II, Renton, WA Tree Assessment November 14, 2024 ArborInfo LLC Page 8 Addenda I. Tree Assessment Summary Table II. Tree Location Plan III. Proposed Site Development Plan Site:Acres:0.921 PN0426A Project 2024-145 Tag #Tree # DBH Height Crown Ratio Root Zone/Outer Radius Root Zone/Inner Radius Viability Common Scientific (inches)(feet) (%)N S E W (feet)(feet)Vitality Structure Viable Class Grove Credit Disposition Comments 1 1*Cottonwood Populus trichocarpa 17.6 65 80 122 19 16 8 41 21 Good Fair Yes Significant no 7 Remove Two codominants 2 2 Cottonwood Populus trichocarpa 11.7 65 80 12 12 10 6 10 5 Good Good Yes Significant no 5 Remove 3 3 Cottonwood Populus trichocarpa 13.6 65 80 8 12 8 14 11 5 Good Good Yes Significant no 6 Remove 4 Native cherry Prunus emarginata 12 60 30 14 2 0 8 6 3 Fair Fair No Significant no 5 Remove Obsured with blackberry and/or ivy- leans north 5 Native cherry Prunus emarginata 7 60 30 20 0 0 4 6 3 Fair Poor No Significant no 4 Remove Obsured with blackberry and/or ivy-fell into No. 4 6 6 Native cherry Prunus emarginata 9 60 60 9 9 9 9 9 5 Good Good Yes Significant yes 4 Remove Obsured with blackberry and/or ivy 7 Native cherry Prunus emarginata 8 40 30 9 9 9 9 9 5 Good Good Yes Significant yes 4 Remove Obsured with blackberry and/or ivy 8 8*Native cherry Prunus emarginata 10 60 20 8 8 8 8 8 4 Good Fair Yes Significant yes 5 Remove Obsured with blackberry and/or ivy 9 9*Native cherry Prunus emarginata 9.7 60 20 7 7 7 7 7 4 Good Fair Yes Significant yes 4 Remove Obsured with blackberry and/or ivy 10 Big leaf maple Acer macrophyllum 14 60 30 14 12 12 10 12 6 Good Fair Yes Significant no 6 Remove Obsured with blackberry and/or ivy 11 Big leaf maple Acer macrophyllum 40 70 80 30 25 30 20 26 13 Good Fair Yes Significant no 13 Remove Obsured with blackberry and/or ivy 12 12 Cottonwood Populus trichocarpa 8.5 45 80 13 8 9 8 10 5 Good Good Yes Significant yes 4 Remove Obsured with blackberry and/or ivy 13 13 Cottonwood Populus trichocarpa 12 50 30 15 7 9 9 10 5 Good Good Yes Significant yes 5 Remove Obsured with blackberry and/or ivy 14 14 Cottonwood Populus trichocarpa 11 45 30 11 0 9 6 7 3 Good Good Yes Significant yes 5 Remove Obsured with blackberry and/or ivy 15 15 Cottonwood Populus trichocarpa 11 65 40 24 3 18 18 16 8 Good Good Yes Significant yes 5 Remove 16 16*Big leaf maple Acer macrophyllum 12 50 70 8 0 17 0 6 3 Good Fair Yes Significant yes 5 Remove Obsured with blackberry and/or ivy- leans east 17 17*Cottonwood Populus trichocarpa 18 70 60 14 14 14 14 14 7 Good Good Yes Significant yes 7 Remove Obsured with blackberry and/or ivy 18 18*Cottonwood Populus trichocarpa 17 70 60 14 14 14 14 14 7 Fair Poor No Significant yes 7 Remove Obsured with blackberry and/or ivy- lower bole decay 19 19*Cottonwood Populus trichocarpa 23.3 65 60 14 14 14 14 14 7 Good Fair Yes Significant yes 9 Remove Obsured with blackberry and/or ivy 20*Cottonwood Populus trichocarpa 19.7 65 60 6 16 22 12 14 7 Good Fair Yes Significant yes 8 Remove Obsured with blackberry and/or ivy 21 21 Cottonwood Populus trichocarpa 12 65 40 8 8 8 8 8 4 Good Good Yes Significant yes 6 Remove Obsured with blackberry and/or ivy 22 22 Cottonwood Populus trichocarpa 13 65 60 0 14 9 24 12 6 Good Fair Yes Significant yes 6 Remove Obsured with blackberry and/or ivy- leans south 23 23 Cottonwood Populus trichocarpa 16 65 80 6 22 14 14 14 7 Good Good Yes Significant yes 7 Remove Obsured with blackberry and/or ivy 24 24 Cottonwood Populus trichocarpa 15 65 80 9 22 10 18 15 7 Good Good Yes Significant yes 6 Remove Obsured with blackberry and/or ivy 25 Cottonwood Populus trichocarpa 14 65 60 14 18 7 16 14 7 Good Good Yes Significant no 6 Remove Obsured with blackberry and/or ivy 26 26 Sitka spruce Picea sitchensis 26 75 90 14 14 14 14 14 7 Good Good Yes Significant no 10 Remove 27 27 Douglas-fir Psuedotsuga menziesii 48 110 90 28 28 28 28 28 14 Good Good Yes Significant no 13 Remove 28*Big leaf maple Acer macrophyllum 25.3 60 70 24 24 24 24 24 12 Good Fair Yes Landmark no 10 Remove Obsured with blackberry and/or ivy- dead wood in upper crown 29 29 Sitka spruce Picea sitchensis 12.2 50 70 13 7 6 13 10 5 Good Good Yes Significant no 6 Remove 30 30 Sitka spruce Picea sitchensis 12.8 60 90 7 7 7 7 7 4 Good Good Yes Significant no 6 Remove 31 31 Sitka spruce Picea sitchensis 20.1 65 70 18 18 18 18 18 9 Good Good Yes Significant no 8 Retain 32 32 Native cherry Prunus emarginata 7.2 60 50 9 4 6 4 6 3 Good Good Yes Significant no 4 Remove Tree Assessment Dripline(ft) On Site Species Vigor Homestead--Willowcrest, 1132 Edmonds Ave NE, Renton Date: 10/14/2024Assessor:Tom Hanson Site:Acres:0.921 PN0426A Project 2024-145 Tag #Tree # DBH Height Crown Ratio Root Zone/Outer Radius Root Zone/Inner Radius Viability Common Scientific (inches)(feet) (%)N S E W (feet)(feet)Vitality Structure Viable Class Grove Credit Disposition Comments Tree Assessment Dripline(ft) On Site Species Vigor Homestead--Willowcrest, 1132 Edmonds Ave NE, Renton Date: 10/14/2024Assessor:Tom Hanson 33 33 Native cherry Prunus emarginata 7.6 55 60 4 8 6 6 6 3 Good Good Yes Significant no 4 Remove 34 Madrone Arbutus menziesii 32 85 80 25 35 35 25 30 15 Good Good Yes Landmark no 11 Remove Obsured with blackberry and/or ivy- behind chain link fence 35 Douglas-fir Psuedotsuga menziesii 24 110 70 25 12 8 30 19 9 Good Good Yes Landmark no 9 Remove Obsured with blackberry and/or ivy- behind chain link fence 36 Douglas-fir Psuedotsuga menziesii 24 110 70 25 16 26 6 18 9 Good Good Yes Landmark no 9 Remove Obsured with blackberry and/or ivy- behind chain link fence 37 37*Native cherry Prunus emarginata 10 60 60 9 14 6 6 9 4 Good Good Yes Significant no 5 Remove 38 Big leaf maple Acer macrophyllum 10 30 70 11 11 11 11 11 6 Good Good Yes Significant no 5 Remove Total 249 28 8 20 Total Required * multiple stems converted to single = (square root(stem1)^2+(stem2)^2+(stem3)^2) Off Site- None Total Retained Total to Plant 1 23 45 6 7 13 9 10 11 12 16 15 14171819 20 21 222324 26 27 25 28 29 30 31 32 33 34 35 36 37MSMS38 Tree Locations