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Shoffner Consulting 21529 4 TH AVE. W. #C31 BOTHELL, WA 98021 MOBILE:(206)755-2871 January 18, 2016 Ms. Yuka Shimizu Willows Preperatory School 12280 Redmond-Woodinville Road Redmond, WA 98052 Re: Tree Inventory and Impact Assessment - Willows Preperatory School. Ms. Shimizu: This report is provided to address the tree inventory I conducted on the Willows Preperatory School property in the City of Redmond, WA. I visited the site last summer to conduct evaluations of the existing trees and to label each with numbered metal tags. See the accompanying Tree Evaluation Data form and topographic survey with the tree numbers for reference to this report. The numbers referenced in this report correspond to those specified in the data form and on the plan. 1.0 Existing Conditions and Proposed Development The property is located in northwest Redmond on a sloping site with a northern aspect. It’s currently developed with several buildings including a school, a sanctuary, a house and a considerable amount of impervious surface/parking area. The new development is proposed in the northwest corner of the site. 2.0 Tree Inventory I conducted an inventory of all surveyed trees on the project site which are scattered across the site, most are around the house on the northern border of the site. The City of Redmond classifies all trees as large as 6” dbh as significant and all trees as large as 30” dbh as landmark. There are 59 trees on the property, three of which meet the size threshold to be classified as exceptional and six that are in poor condition and/or health and therefore are classified as exempt. The information on all the trees is provided in the Tree Evaluation Data form. 3.0 Retained Tree Protection Requirements and Measures Trees classified as retained in the City of Redmond are to be protected at a setback zone of five feet from the dripline edge. These protection zones are required for all trees adjacent to proposed impacts. The protection setbacks are shown on the topographic survey for all trees to be retained. Page !1 ATTACHMENT 21 ---PAGE BREAK--- 5.0 Summary of Tree Retention Per section 20D.80.20-70 Tree Protection Standards of the Redmond Community Development Guide (RCDG), a minimum of 35% of existing, healthy significant trees are to be retained on developing properties. The following Summary of Tree Retention Table provides a breakdown of the 10 healthy significant trees on site and the proposed retention and removal to satisfy the requirements of the RCDG: No healthy significant or landmark trees are proposed to be removed, therefore no replacement is required. 6.0 Use of This Report This report is provided to Willows Preperatory School for the purpose of addressing the existing trees on the project site of the Willows Preperatory School to address the required retention and the protection of the trees to be retained.This information is the property of Willows Preperatory School and cannot be amended by anyone other than Shoffner Consulting. This report doesn’t guarantee against damage caused by the failure of any tree, nor does it guarantee that trees not recommended for removal will live long into the future. If you have any questions regarding this report, please feel free to call me directly. Cordially, ! Tony Shoffner ISA Certified Arborist #PN-0909A CTRA #1759 Remove Impacted Retain Total Landmark 0 0 3 (100%) 3 (100%) Significant 0 0 50 (100%) 50 (100%) Total 0 0 53 (100%) 53 (100%) Page !2 ATTACHMENT 21 ---PAGE BREAK--- Willow's Preperatory School TREE INVENTORY EVALUATION DATA April 2015 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 TREE # SPECIES DBH DRIP LINE DIAM LCR SYMMETRY FOLIAGE CROWN CONDITION TRUNK ROOT COLLAR ROOTS COMMENTS SIZE STATUS CURRENT HEALTH RATING STATUS / RECOMMENDATIO N 1 PIMO 8 16 75 Good Good Good Good Good Good Generally good condition and health Significant 1 2 PIMO 8 18 75 Good Good Good Good Good Good Generally good condition and health Significant 1 3 CULE 12 16 75 Good Good Good Good Good Good Generally good condition and health Significant 1 4 PIMO 14 18 75 Good Good Good Good Good Good Generally good condition and health Significant 1 5 CULE 12 16 75 Good Good Good Good Good Good Generally good condition and health Significant 1 6 CULE 8 14 75 Good Good Good Good Good Good Generally good condition and health Significant 1 7 PSME 20 36 50 Good Good Good Good Good Good Generally good condition and health Significant 2 8 ACMA 36 70 40 Good Good Good Good Good Good Generally good condition and health Landmark 2 9 ACMA 16 48 45 Good Good Good Good Good Good Generally good condition and health Significant 2 10 CULE 12 16 75 Good Good Good Good Good Good Generally good condition and health Significant 1 11 ACMA 36 75 40 Good Good Good Good Good Good Generally good condition and health Landmark 2 12 ACMA 24 66 40 Good Good Good Good Good Good Generally good condition and health Significant 2 13 PIMO 14 25 75 Good Good Good Good Good Good Generally good condition and health Significant 1 14 PIMO 12 22 75 Good Good Good Good Good Good Generally good condition and health Significant 1 15 PIMO 8 18 75 Good Good Good Good Good Good Generally good condition and health Significant 1 16 PIMO 12 26 75 Good Good Good Good Good Good Generally good condition and health Significant 1 17 CULE 15 16 75 Good Good Good Good Good Good Generally good condition and health Significant 1 18 CULE 12 16 75 Good Good Good Good Good Good Generally good condition and health Significant 1 19 PIMO 12 25 75 Good Good Good Good Good Good Generally good condition and health Significant 1 20 CULE 8 14 75 Good Good Good Good Good Good Generally good condition and health Significant 1 21 CULE 10 16 75 Good Good Good Good Good Good Generally good condition and health Significant 1 22 CULE 12 16 75 Good Good Good Good Good Good Generally good condition and health Significant 1 23 PYCO 8 26 55 Good Good Good Good Good Good Generally good condition and health Significant 1 24 CULE 10 18 75 Good Good Good Good Good Good Generally good condition and health Significant 1 25 PYCO 8 30 50 Good Good Good Good Good Good Generally good condition and health Significant 1 26 PYCO 6 30 55 Good Good Good Good Good Good Generally good condition and health Significant 1 27 PYCO 8 26 55 Good Good Good Good Good Good Generally good condition and health Significant 1 28 PSME 16 35 75 Good Good Good Good Good Good Generally good condition and health Significant 2 29 TSHE 8 12 85 Good Good Good Good Good Good Generally good condition and health Significant 1 30 TSHE 8 14 85 Good Good Good Good Good Good Generally good condition and health Significant 1 31 PSME 16 34 85 Good Good Good Good Good Good Generally good condition and health Significant 2 32 BEPE 12 N/A N/A N/A N/A Poor N/A N/A N/A Terminal dieback; dying Exempt 4 33 BEPE 12 N/A N/A N/A N/A Poor N/A N/A N/A Terminal dieback; dying Exempt 4 34 BEPE 20 N/A N/A N/A N/A Poor N/A N/A N/A Terminal dieback; dying Exempt 4 35 PISY 14 N/A N/A N/A N/A Poor N/A N/A N/A Terminal dieback; dying Exempt 4 36 PISY 14 30 40 Fair Good Good Good Good Good Generally good condition and health Significant 3 37 PISY 14 28 40 Fair Good Good Good Good Good Generally good condition and health Significant 3 38 PISY 14 30 45 Fair Good Good Good Good Good Generally good condition and health Significant 3 39 UD 20 42 55 Good Good Good Good Good Good Generally good condition and health Significant 2 40 COCO 20 36 50 Good Good Good Good Good Good Generally good condition and health Significant 2 41 PRSP 20 N/A N/A N/A N/A Poor Poor N/A N/A Extensive trunk decay Exempt 4 42 ABPR 22 42 80 Good Good Good Good Good Good Generally good condition and health Significant 2 43 PISI 24 44 55 Good Good Good Good Good Good Generally good condition and health Significant 2 44 AEHI 24 50 45 Good Good Good Good Good Good Generally good condition and health Significant 2 45 PIMO 28 42 70 Good Good Good Good Good Good Generally good condition and health Significant 2 46 PSME 12 25 65 Good Good Good Good Good Good Generally good condition and health Significant 1 47 PISI 20 35 50 Good Good Good Good Good Good Generally good condition and health Significant 2 48 THPL 30 40 90 Good Good Good Good Good Good Generally good condition and health Landmark 2 49 MADO 16 28 45 Good Good Good Good Good Good Generally good condition and health Significant 2 50 MADO 16 32 45 Good Good Good Good Good Good Generally good condition and health Significant 3 51 BEPE 24 N/A N/A N/A N/A Poor N/A N/A N/A Terminal dieback; dying Exempt 4 52 ALRU 12 32 45 Good Good Good Good Good Good Generally good condition and health Significant 1 53 ALRU 12 32 40 Good Good Good Good Good Good Generally good condition and health Significant 1 54 ALRU 12 30 40 Good Good Good Good Good Good Generally good condition and health Significant 1 55 ALRU 12 32 45 Good Good Good Good Good Good Generally good condition and health Significant 1 56 ALRU 12 30 45 Good Good Good Good Good Good Generally good condition and health Significant 1 57 ALRU 12 32 45 Good Good Good Good Good Good Generally good condition and health Significant 1 58 ALRU 12 32 40 Good Good Good Good Good Good Generally good condition and health Significant 1 59 ALRU 12 32 45 Good Good Good Good Good Good Generally good condition and health Significant 1 #1 Tree Individual tree number. #11 Roots: Root problems are noted here. #2 Species: ABPR Abies procera (Noble fir) #12 Comments: Additional observations about the tree's condition. ACMA Acer (Bigleaf maple) #13 Significance: A “significant” tree is at least 6” in diameter measured at 4.5’ above the average ground level. AEHI Aesculus hippcastanum (horsechestnut) #14 Current Health Rating: A description of general health ranging from dead, dying, hazard, poor, suppressed, fair, good, very good, to excellent. BEPE Betula pendula (European birch) #15 Status / Recommendation: This is an estimate of whether or not the tree is of sufficient health, vigor, and structure to consider retaining. COCO Corylus cornuta (beaked hazlenut) CULE x. Cupressocyparis leylandii (Leyland cypress) MADO Malus domestica (common apple) PIMO Pinus monticola (western white pine) PISY Pinus sylvestris (Scot’s pine) PRSP Prunus species (ornamental cherry) PSME Pseudotsuga menziesii (Douglas fir) THPL Thuja plicata (western red cedar) TSHE Tsuga (western hemlock) UD Unidentified deciduous #3 DBH: Trunk diameter @ 4.5' above average ground level. #4 Drip Line: The radius, the distance from the trunk to the furthest branch tips. #5 LCR: Live Crown Ratio - the amount of live canopy expressed as a % of the entire tree height #6 Symmetry: General shape of canopy and weight distribution of the tree around the trunk. #7 Foliage: General description of foliage density that indicates tree health and vigor. #8 Crown Condition: The most important external indication of tree health and vigor. #9 Trunk: Description of trunk condition or abnormalities if any. 1 ATTACHMENT 21 ---PAGE BREAK--- 7 8 9 11 12 1 2 3 4 5 6 10 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 ATTACHMENT 21