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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. [PHONE REDACTED] TO: Todd Levitt CR Homebuilders, LLC 14410 Bel Red Road Bellevue WA 98007 REFERENCE: Holmgren Second Amended Tree Health Report SITE ADDRESS: 16130 NE 51st Street, Redmond WA 98052 DATE: May 2, 2018 PREPARED BY: Favero Greenforest, ISA Certified Arborist # PN -0143A ISA Tree Risk Assessment Qualified ASCA Registered Consulting Arborist® #379 This Tree Health Report establishes the condition of the regulated trees at the site referenced above. This report documents the health of 14 onsite trees (as well as 6 offsite trees). You provided me a tree survey prepared by Core Design. I visited the site 2/17/2017 and inspected the trees. SUMMARY: Total Unhealthy Healthy Significant Trees on Site 10 0 10 Landmark Trees on Site 4 0 4 Total Trees 14 0 14 The site comprises two side-by-side parcels: [PHONE REDACTED] and [PHONE REDACTED], with a combined area of approximately 38,880 SF. [This is an amended version of my June 12, 2017 report correcting numerical errors in the Compliance Chart on page 3, and now includes text from my 10/21/17 Addendum regarding the stability of Trees 8334 and 8333, pasted below as the final section of the report body.] ---PAGE BREAK--- Todd Levitt, CR Homebuilders, LLC RE: Holmgren Second Amended Tree Health Report, 16130 NE 51st Street, Redmond WA May 2, 2018 Page 2 of 9 Greenforest Registered Consulting Arborist TREE INSPECTION METHOD I performed a Level 1 tree 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. A limited visual assessment like this typically focuses on identifying trees with imminent and/or probable likelihood of failure. This report establishes tree health based on existing conditions and tree structure, and specifies which trees are most suitable for preservation.2 I recorded tree species and size (DBH). I measured the dripline of each tree. I rated the condition of each tree, both health and structure. ‘Healthy trees’ appear normal and vital, are without obvious defects, or have minor defects that, if retained within a grove or stand of trees, will not affect their usefulness as a landscape amenity once development is complete. The subject trees were tagged and numbered with a 1” x 3” aluminum tag prior to my inspection. The attached tree inventory contains the following information on each tree. Proposed Action indicates if the tree is to be retained impacted or removed. Tree number as indicated on tag in field and shown on the attached site plan. Tree Category indicates if tree is Significant or greater DBH) or Landmark (greater than 30” DBH). DBH Stem (trunk) diameter in inches 4.5 feet from grade. Tree Species Common name. Dripline Average branch extension in feet as radius from the trunk. Health and Structure rating indicates no visible health-related problems or structural defects, indicates minor visible problems or defects that may require attention if the tree is retained, and indicates significant visible problems or defects: the tree is considered unhealthy and removal is recommended. Comments on Health Obvious structural defects or diseases visible at time of inspection. Healthy Trees have no visible health-related problems or structural defects; or have minor visible problems or defects that may require attention or maintenance if the tree is retained, and/or the tree should only remain as a grove tree, and not stand 1 Companion publication to the ANSI A300 Part 9: Tree Shrub and Other woody Plant Management – Standard Practices, Tree Risk Assessment. 2011. ISA. 2 Companion publication to the ANSI A300 Part 5: Tree Shrub and Other woody Plant Maintenance – Standard Practices, Managing Trees During Construction. 2008. ISA. ---PAGE BREAK--- Todd Levitt, CR Homebuilders, LLC RE: Holmgren Second Amended Tree Health Report, 16130 NE 51st Street, Redmond WA May 2, 2018 Page 3 of 9 Greenforest Registered Consulting Arborist alone. An unhealthy tree has significant visible problems or defects and tree removal is recommended. This project proposes the removal of 4 landmark trees and 5 significant trees. There are no impacted trees on this project. Compliance Chart for Regulated Trees Tree Category Removed Retained Total Landmark >30" Number of Removed landmark 4 Percent of Retained Landmark 0 Total Landmark Trees 4 Percent of Removed Landmark 28% Percent of Retained Landmark 0% Percent Landmark of All Trees 28% Significant 6- 30" Number of Removed Significant 5 Number of Retained Significant 5 Total Significant Trees 10 Percent of Removed Significant 36% Percent Retained of all Significant 36% Percent of Significant of All Trees 72% Totals Number of Land. + Sig. Removed 9 Number of Land. + Sig. Retained 5 Total Number of All Trees 14 Percent of Removed of all Trees 64% Percent of Retained of all trees 36% 100% The attached Tree Retention Plan provides the location and numbering for each tree, illustrating each tree’s dripline, and illustrating 5’ from each tree’s dripline. 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 trees 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 ---PAGE BREAK--- Todd Levitt, CR Homebuilders, LLC RE: Holmgren Second Amended Tree Health Report, 16130 NE 51st Street, Redmond WA May 2, 2018 Page 4 of 9 Greenforest Registered Consulting Arborist 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. STABILITY OF TREES 8334 & 8333 The 4th Request for Additional Information dated 4.3.18 item I.B.2.d seeks a guarantee regarding Tree 8334 and 8333. Please know that trees are biological organisms, and there is no guarantee for their stability. Based on my observations, tree attributes and proposed clearing and use of the site, these trees pose low risk, which is the lowest possible risk rating. Below is the text from my initial 10/21/17 Addendum. This is Addendum to my October 21, 2017 Amended Tree Health Report and confirms the windfirmness of two retained trees, specifically addressing this comment from a City planner: “ Since Tree 8335 is not going to remain, confirmation from the arborist within the report will need to be provided that Tree 8334 and 8333 will be stable with the removal of Tree 8335.” I revisited the site today and measured the height of both trees, and I calculated the Height/Diameter ratio (H/D) and Live Crown Ratio (LCR). Height/Diameter: the ratio of tree height to stem (trunk) diameter3, or DBH. Also referred to as slenderness. Stand-alone trees with an H/D ratio of 50 and greater are at increased risk of failure. Live crown ratio: the ratio of the tree height to the portion of the tree with foliage- bearing branches. 4 Stand-alone trees with a LCR of 30 and lower are at increased risk of failure. The following table summarizes the size (DBH), height, H/D and LCR for both trees. Tree No. DBH Species Tree Height H/D LCR 8333 28” Cedar 85’ 36 95% 8334 21” Cedar 90’ 51 95% 3 Mattheck, C. Tree Mechanics. 2002. Forschungszentrum Karlsruhe GMBH. 4 Matheny, Nelda and James R. Clark. A Photographic Guide to the Evaluation of Hazard Trees in Urban Areas. ISA. ---PAGE BREAK--- Todd Levitt, CR Homebuilders, LLC RE: Holmgren Second Amended Tree Health Report, 16130 NE 51st Street, Redmond WA May 2, 2018 Page 5 of 9 Greenforest Registered Consulting Arborist Both trees have LCRs far in excess of 30%. The H/D for tree 8333 is below the threshold of 50 regarding trunk taper, and tree 8334 is at the threshold, at a H/D of 51. These thresholds are for stand-alone trees. Although site clearing will removed two adjacent trees, 8335 (to the east) and 8331 (to the south), tree 8332 (an offsite tree immediately west) as well as several other offsite trees to the west and SW will remain standing, all as part of a contiguous canopy, never causing these two trees in question to stand alone. It is my opinion that both trees 8333 and 8334 have the structural attributes to remain windfirm upon the removal of tree 8335. Attachments: 1. Assumptions & Limiting Conditions 2. Certification of Performance 3. Tree Inventory 4. Tree Retention Plan ---PAGE BREAK--- Todd Levitt, CR Homebuilders, LLC RE: Holmgren Second Amended Tree Health Report, 16130 NE 51st Street, Redmond WA May 2, 2018 Page 6 of 9 Greenforest Registered Consulting Arborist Attachment No. 1 - Assumptions & Limiting Conditions 1) A field examination of the site was made 2/17/2017. 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) 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. 4) 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. 5) Loss or alteration of any part of this report invalidates the entire report. 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. 8) The consultant does not assume any liability for the subject tree and does not represent the transfer of such for any risks associated with the tree from the landowner to the consultant. 9) Risk management is solely the responsibility of the landowner. 10) Trees are biological systems and change over time; therefore, future inspections are required and are the responsibility of the landowner to initiate. ---PAGE BREAK--- Todd Levitt, CR Homebuilders, LLC RE: Holmgren Second Amended Tree Health Report, 16130 NE 51st Street, Redmond WA May 2, 2018 Page 7 of 9 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: Favero Greenforest, M. S. Date: May 2, 2018 Favero Greenforest Digitally signed by Favero Greenforest DN: cn=Favero Greenforest, o, ou, c=US Date: 2018.05.02 14:52:24 -07'00' ---PAGE BREAK--- Todd Levitt, CR Homebuilders, LLC RE: Holmgren Second Amended Tree Health Report, 16130 NE 51st Street, Redmond WA May 2, 2018 Page 8 of 9 Greenforest Registered Consulting Arborist Attachment No. 3 – Tree Inventory Retain Retain/ Impacted Remove for Improvements Tree No. Tree Category DBH Tree Species Dripline Health Structure Comments on Health Healthy Tree? X 8091 Significant 20,22,23” Elm 35’ 1 2 Multiple leaders, previous branch failure, hangers YES X 8134 Significant 26” Western red-cedar 15’ 1 1 YES X 8135 Landmark 41” Douglas-fir 23’ 1 1 YES X 8136 Landmark 45” Western red-cedar 19’ 1 2 Sweep in trunk YES X 8137 Landmark 54” Western red-cedar 22’ 1 2 Multiple leaders in upper canopy YES X 8205 Significant 11” Pear 11’ 1 2 Decay, mal-pruned YES X 8331 Significant 24” Douglas-fir 22’ 1 1 YES X 8333 Significant 28” Western red-cedar 16’ 1 1 YES X 8334 Significant 21” Western red-cedar 15’ 1 2 Asymmetric canopy YES X 8335 Significant 21” Western red-cedar 19’ 1 2 Asymmetric canopy YES X 8336 Significant 19” Douglas-fir 17’ 1 2 Asymmetric canopy, suppressed YES X 8338 Significant 11” Cherry 11’ 2 2 Asymmetric canopy, suppressed, deadwood YES X 8501 Significant 10” Douglas-fir 9’ 1 2 Slender YES X 9170 Landmark 45” Western red-cedar 18’ 1 2 Multiple leaders in upper canopy YES Offsite Trees 8144 Significant 16” Western red-cedar 15’ 1 1 8145 Significant 15” Western red-cedar 13’ 1 1 8146 Significant 9” Western red-cedar 11’ 1 1 8185 Landmark 59” Sequoia 16’ 1 1 8332 Significant 20” Western red-cedar 13’ 1 1 8337 Significant 5,7,9,20” Western red-cedar 15’ 1 2 ---PAGE BREAK--- This approval is for the design concept ŽŶůLJ͘ These plans appear to be in conformance with the City Of Redmond design standards for ĐŽŶƐƚƌƵĐƚŝŽŶ͘ This approval shall not be construed as authorizing construction not in accordance with applicable City ƐƚĂŶĚĂƌĚƐ͘ The City reserves the right to require revisions to the approved plans to assure conformance with City of Redmond design standards for construction at any time that it is discovered that the proposed construction does not otherwise meet the applicable construction ƐƚĂŶĚĂƌĚƐ͘ The owner is required to provide designs and plans in accordance with applicable City standards and assures that construction is accomplished in accordance with those ƐƚĂŶĚĂƌĚƐ͘ The owner and/or design engineer and/or developer may be required to make necessary approved field revisions to correct any errors or omissions found on the approved plan. APPROVED FOR CONSTRUCTION Director of Public Works City of Redmond Date: Plan Check Engineer: Planning: Trans / Engr: Fire: Utility: Storm: SCALE: 1" = 20' TREE PRESERVATION PLAN LANDMARK TREE TO BE REMOVED LANDMARK TREE TO BE RETAINED SIGNIFICANT TREE TO BE RETAINED SIGNIFICANT TREE TO BE REMOVED LEGEND NOTES 1. FOR MORE DETAILED INFORMATION REGARDING THE TREES, PLEASE SEE ARBORIST REPORT BY GREENFOREST INCORPORATED. 2. DEAD AND UNHEALTHY TREES HAVE BEEN REMOVED FROM COUNTS. CLEARING LIMITS CITY OF REDMOND CODE REFERENCES RZC 21.72.060 - 35% OF EXISTING SIGNIFICANT (HEALTHY) TREES MUST BE RETAINED ON SITE - SIDEWALKS & UTILITIES MAY BE LOCATED WITHIN DRIPLINE OF A PROTECTED TREE - THE ADMINISTRATOR MAY ALLOW CONSTRUCTION LIMITS OR ALTERATION OF GRADES WITHIN 5' OF DRIPLINE OF A PROTECTED TREE . RZC 21.72.080 - SIGNIFICANT TREES WILL BE REPLACED AT A 1:1 RATIO - LANDMARK TREES WILL BE REPLACED AT A 1:3 RATIO - REPLACEMENT TREE SIZING: - DECIDUOUS 2.5" MIN CALIPER - EVERGREEN 6' HT MIN. RZC 21.72.070 - PLEASE REFER THIS CHAPTER TO ENSURE TREES THAT ARE TO REMAIN ARE PROPERLY PROTECTED. SUMMARY OF ON-SITE TREE RETENTION TREE TYPE REMOVAL TOTAL RETAINED LANDMARK (OVER 30" DBH) SIGNIFICANT - 30" DBH) TREE REPLACEMENT REQUIRED (SIGNIFICANT - 1:1 LANDMARK - 3:1) 14 100% 10 72% 4 28% 0 0% 5 36% 5 36% 9 64% 5 36% 4 28% 17 REPLACEMENT TREE CALCULATIONS SIGNIFICANT TREES REMOVED: 5 (REPLACED AT 1:1 RATIO) SIGNIFICANT TREES TO BE REPLACED: 5 LANDMARK TREES REMOVED: 4 (REPLACED AT 3:1 RATIO) LANDMARK TREES TO BE REPLACED: 12 TOTAL REQUIRED REPLACEMENT TREES: 17 X X SIGNIFICANT TREE TO BE RETAINED (TYP.) 5' BUILDING SETBACK FROM RETAINED TREE DRIPLINE (TYP.) 5' BUILDING SETBACK FROM TREE DRIPLINE SIGNIFICANT TREE TO BE REMOVED (TYP.) LANDMARK TREE TO BE REMOVED (TYP.) OFFSITE TREE (TYP.) X X X X X XX X X 50' RADIUS AROUND SITE OFFSITE TREE (APPROXIMATE LOCATION) CLEARING LIMITS (TYP.) 5' TREE DRIPLINE SIGNIFICANT EXISTING TREE CONTINUOUS CHAINLINK FENCING POSTS AT MAX. 8' O.C. NOTE: 1. MINIMUM FIVE FOOT HIGH TEMPORARY CHAINLINK FENCE SHALL BE PLACED AT THE 5' SETBACK FROM TREE DRIPLINE OR DESIGNATED LIMIT OF DISTURBANCE OF THE TREE TO BE SAVED. FENCE SHALL COMPLETELY ENCIRCLE TREE(S). INSTALL FENCE POSTS USING PIER BLOCK ONLY. MODIFICATIONS TO FENCING MATERIAL AND LOCATION MUST BE APPROVED BY PLANNING OFFICIAL. 2. TREATMENT OF EXPOSED ROOTS DURING CONSTRUCTION: FOR ROOTS OVER ONE INCH DIAMETER DAMAGED DURING CONSTRUCTION, MAKE A CLEAN STRAIGHT CUT TO REMOVE THE DAMAGED PORTION OF ROOT. ALL EXPOSED ROOTS SHALL BE TEMPORARILY COVERED WITH DAMP BURLAP TO PREVENT DRYING, AND COVERED WITH SOIL AS SOON AS POSSIBLE. 3. NO STOCKPILING OF MATERIALS, VEHICULAR TRAFFIC, OR STORAGE OF EQUIPMENT OR MACHINERY SHALL BE ALLOWED WITHIN THE LIMIT OF THE FENCING. FENCING SHALL NOT BE MOVED OR REMOVED UNLESS APPROVED BY THE CITY PLANNING OFFICIAL. WORK WITHIN THE PROTECTION FENCE SHALL BE DONE MANUALLY UNDER THE SUPERVISION OF AN ON-SITE ARBORIST AND WITH PRIOR APPROVAL BY THE CITY PLANNING OFFICIAL. 5' SETBACK FROM TREE DRIPLINE 5' SETBACK FROM TREE DRIPLINE TREE PROTECTION FENCING Todd Levitt, Murray Companies RE: Holmgren Second Amended Tree Health Report, 16130 NE 51st Street, Redmond WA May 2, 2018 Page 9 of 9 Attachment No. 4 – Tree Retention Plan