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Hazard tree removal CRA2021-0041CITY OF EDMONDS 121 5t" Avenue North, Edmonds WA 98020 Phone: 425.771.0220 • Fax: 425.771.0221 • Web: www.edmondswa.gov DEVELOPMENT SERVICES DEPARTMENT • PLANNING DIVISION "ne. I STJ March 31, 2021 Jola Stephenson 905 — 7t" Avenue N Edmonds, WA 98020 Subject: Hazard Tree Removal Dear Ms. Stephenson, The City of Edmonds has received a request to remove big leaf maple tree from your property located at 905 — 7t" Avenue North. The tree is located in your back yard near Shell Creek. Shell Creek is an anadromous fish bearing stream, which is a critical area with buffer of 100 feet pursuant to Chapters 23.90 of the Edmonds Community Development Code (ECDC). Generally the removal of trees, or any vegetation, within a critical area or critical area buffer is not an allowed activity, unless, pursuant to ECDC 23.40.220.C.8, it involves the removal of invasive species or hazard trees. In order to fall under the hazard tree provisions of ECDC 23.40.220.C.8.b a tree must be determined to be a high risk by a certified arborist. The request to remove the tree included an ISA Tree Risk Assessment form completed by certified arborist Zsofia Pasztor who found the tree to have an overall tree risk rating of "High". Pursuant to ECDC 23.40.220.C.8.b.iv each hazard tree removed within a critical area or critical area buffer must be replaced with new trees at a ratio of two to one. It has been indicated that you propose to replace the big leaf maple with two vine maples (Acer circinatum). An exemption for the tree cutting is granted with the following conditions: 1. This approval only pertains to the big leaf maple tree identified in the attached materials. Two tree must be planted to replace the subject Douglas fir tree. The replacement trees must be native and indigenous in accordance with ECDC 23.40.220.C.8.b.iv. The proposed replacement of two vine maple are appropriate replacement tree species. Alternative species must be approved by the City of Edmonds. 3. Replacement trees must be planted within one year of removal of the hazard trees. Please notify the City once the replacement trees have been replanted for an inspection. Feel free to contact me if you have any questions at kernen.lien@edmondswa.gov, or 425-771-0220. Sincerely, f Kernen Lien Environmental Programs Manager End: Cover Letter ISA Tree Risk Assessment Form Site Plan Photos 23 March, 2021 Regarding removal of dying/dead Bigleaf Maple in the 100' zone of Shell Creek at 905 7th Ave N. Edmonds, WA 98020. Failure of this tree is already occurring in that some of the earliest dying branches have already fell. The trunk rot is progressing rapidly to the point that the tree removal company wishes to begin work immediately before it becomes less stable and before it leafs out. This tree will be replaced by two Acer Circinatum trees of minimum 1" diameter breast height. Jola Stephenson 905 7th Ave N Edmonds, WA 98020 206-909-4996 ?1 7 1 RECEIVED MAR 2 F 2021 DEVELOPMENT SERVICES COUNTER h a.a w• , '• •I �.lAw .� ice. � � ' a � • �.•�R''z �' I . -1790 �•f,•• � fir'" � .?c'y ,K �•: "''.�% � I' Aid 00 '� _ �•. :�f� sue„ y r-•. 1. ' . _ • i _ . kt • t '�.� r Tyr ._.�....-.y�r...� �"f•-Z,�; rt:o-�. bw dw err " Il W r 60072mO41V f A p�+� oMrrtlt;o) TIf=tllOTC)fl !.; CIr�,'liri�l{:I.E. F�xt EI IUt;ION Cur MOO.. AND Uf VW V�G s- ICc. I rite' � t �rur.r-.I J • 10, .til h-11✓L� '1 1) 1)f'I(7�• � fl ! �i ! I� +�I � ,� y [[7Ctl'f.rlltt�lt.•; -I' /�f, I -I- ADD GUTTERS/ OWNSPOUTS LjEj(qPTG ►4 Gl. `� `I AND SPL A HBLOCKS r q r g = 4- l 04- or cC r.r ✓ D� + qZ F LT'tA 0 L = 101 � - IV" HS j�z,� �« f 7.tt�f•,i�n� 1�- oaf l�-}—tS'— g� -� I zo 1~X I STl rJ (, III I %+rsln��lcr �1 GAfZAGE Lo "1 t-l_�� /t. __ _ -i l �7, gl o ,^}. Cr . I '!4+ 1 13t,o l i, 4 00 56k r-l- l ' Gp��iz�fE; - l��'tUEkt��'( 1)�t v�w4 C,�AA) L L_ b ,3 WSJ -+Cl Z p><°t� r'r'r'LI&IE +r" L m � (n(.v -�• I o 5 -F I o �• '1 q °I 'l' � `� ' `-� Lr -� q I -}• `%� t `�i z. APPROVED AS NOTE-0 ,, Y (Nf E�iIN ID0,' 'L,t in Client Address/Tree location Tree species Assessor(s) Basic Tree Risk Assessme it Form _ �}— Dat Time 'Ai,p��: cly�L��- Tree no X_ Sheet �_ of dbi� Height '7, Crown spread dia. _ Tools used�(� Time frame _^ Target Assessment Target zone Occupancy n•. c c c Target description Target protection' lra�ee «� c = ep N r Z- occasional 3 - frequent 4-constant rL E O, 1fV Al 2 3 4 History of failures Site Topography Flat❑ Slop% AspectZZ Site changes Nontp"rade changeO Site clearingO Changed soil hydrology❑ Root cuts❑ Describe J Soil conditions limited volume O Saturated;MLShallowgkompacted ❑ Pavement over rootsO % Describe Prevailing wind direction_ Common weather Strong winds9llce❑ Snow❑ Heavy raing_ Describe Tree Health and Species Profile Vigor LovlK,Normal ❑ High O Foliage None (seasonalf f3� None (dead)❑ Normal -14-% Chlorotic % Necrotic% Pests/Biotic Abiotic Species failure profile Branches^7runk ots❑ Describe Load Factors Wind exposure Protected [3 PartiaFull❑ Windfunneling❑ Relative crown size SmallO Mediu LargeO Crowndensity Sparsly"ormal0 Dense❑ Interior branches Few ormalCl Dense❑ Vines/Mistletoe/MossO Recent or expected change in bad factors Tree Defects and Conditions Affecting the likelihood of Failure — Crown and Branches — Unbalanced crown O LCR' i Y. Cracks O Lightning damage ❑ Dead twigs/branches ❑ % overall Max. dia. / Codominanrw ?j - Sy��l Included bark. Broken/Hangers Number Max. dia. Weak attachments ❑ Cavity/Nest holf /�9'o dre. Cher -extended branches O Previous branch failures '9Similar branches present Pruning history ,- Dead/Missing bark Cankers/Galls/BurlsS Sapwood damage/decay ❑ Crown cleaned ❑ Thinned ❑ Raised ❑ Conks O Heartwood decay�l %�,;0 Reduced ❑ Topped ❑ Lion -tailed ❑ Flush cuts ❑ Other Response growth Condition (s)ofconcern 2��;/ Part Size Fall Distance d Part Size W!iF L! S4:! ' Fall Distance Load on defect N/A O Minor O Moderate O Significan>Q:C_ Load on defect N/A O Minor O ModeratOZignificant ❑ Likelihood of failure ImprobableO PossibleO Probable O Imminen>k Likellhoodoffailure ImprobableO Possibit;PI-Pfobable Cl Imminent❑ —Trunk — — Roots and Root Collar — Dead/Missing bark ❑ Abnormal bark texture/color ❑ Collar buried/Not visible ❑ Depth Stem girdling ❑ Codominant stems Included bark ❑ Cracks ❑ Dead O DeZU13CoksfMushrooms ❑Sapwood damage/decay O Cankers/Galls/Burls ❑ Sap ooze ❑ ooze Oty ❑ % circ. lightningdamageO Heartwood decay Conks/Mushroom Cracks ❑ Cut/Damagedm trunk Cavity/Nest hole %circ. Depth Poor taper O Root plate lifting ❑Soil weakness ❑ Lean ° Corrected? Response growth Response growth �m Condition (s) of con Condition (s) of concern�� Part Size Fall Distance- — Part Size Fall Distance Load on defect N/A O Minor ❑ Modera� ignificant O Load o elect N/A ❑ Minor ❑ Moderate❑ Significant ❑ Likelihood offailure ImprobableO Possible Probab imminent ❑ Likeli oodoffailure ImprobableO Possible❑ Probable O Imminent ❑ Page I of 2 Risk Categorization Target (Target number Tree part Condition(s) ofconc ern Likelihood Bill pill Bull Bill, mono NONE ones Emma low"45A ONNOMMOOMMONERIONEIN mommommommmmommom III ommmonommommmomm ■■■■■■■M■NSI■■NNEONOOMMONEEMOOMEN mommommommommomm Matrix I. Likelihood matrix Likelihood of failure Likelihood of Impact Very lore Low Medium High Imminent Unlikely Somewhat likely Likely Very likely Probable Unlikely Unlikely I Somewhat likely Ukely Possible Unlikely Unlikely Unlikely Somewhat likely Improbable I Unlikely Unlikely I Unlikely I Unlikely Matrix 2. Risk rating matrix Likelihood of Failure & Impact Consequences of Failure Negligible Minor Significant Severe Very likely Low Moderate High Extreme Likely Low Moderate High High Somewhat likely Low Low Moderate Moderate Unlikely Low Low Low Low Notes, explanations, descriptions North Mitigation options 1./` Residual risk A4�- 2 3. a. Residual risk Residual risk Residual risk Overall tree risk rating Low ❑ Moderate ❑ High Extreme ❑ Overall residual risk Non/�1 _Low ❑ Moderate El High ❑ Extreme ❑ Recommended inspection interval Da6a Final ❑ Preliminary Advaannced assessment needed ❑No ❑Yes-Type/Reason Inspection IlmitationsY None ❑Visibility ❑Access ❑Vines ❑Root collar buried Describe This dalasheet was produced by the International Society of Arboriculture (ISA) — 2017 Page 2 of 2