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HomeMy WebLinkAboutA_Arborist_Report_151222_V1 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           December  21,  2015     Satwant  Singh   15423  SE  272nd  St.,  Ste.  110   Kent  WA  98042     RE:    Arborist  Report  –  Grant  Place  Townhomes,  1600  Grant  Ave  S.,  Renton  WA     Dear  Mr.  Singh:     In  preparation  for  development  of  the  above  referenced  site,  you  contracted  my   services  as  a  consulting  arborist.    My  assignment  is  to  inspect  certain  trees  proposed  for   retention,  and  assess  their  viability  as  retained  trees.       Project  architect  David  Vincent  provided  me  a  Topographic  Survey  prepared  by  Tyee   Surveyors,  dated  7/22/15  showing  the  location  of  the  surveyed  trees  on  site  (See   attached).  The  survey  was  annotated  to  identify  11  trees  proposed  for  retention.  I   visited  the  site  12/16/2015  and  inspected  the  11  trees,  which  are  the  subject  of  this   report.       TREE  INSPECTION   I  visually  inspected  each  tree  from  the  ground  and  rated  both  tree  health  and  structure.     A  tree’s  structure  is  distinct  from  its  health.    This  inspection  identifies  what  is  visible   with  both.    Structure  is  the  way  the  tree  is  put  together  or  constructed,  and  identifying   obvious  defects  can  be  helpful  in  determining  if  a  tree  is  predisposed  to  failure.    Health   addresses  disease  and  insect  infestation.         No  invasive  procedures  were  performed  on  any  trees.  The  results  of  this  inspection  are   based  on  what  is  visible  at  the  time  of  the  inspection.           Satwant  Singh   RE:    Arborist  Report  –  Grant  Place  Townhomes,  1600  Grant  Ave  S.,  Renton  WA   December  21,  2015   Page  2  of  6   Greenforest Registered Consulting Arborist The  table  below  summarizes  the  following  information  about  each  tree:     Tree  number  as  indicated  on  the  attached  plan.   DBH  Stem  diameter  in  inches  measured  4.5  feet  from  the  ground  (DBH).   Tree  Species  Common  name.     Tree  Category  Indicates  if  tree  is  Significant1,  Landmark2  or  Dangerous3   Dripline  Average  canopy  extension  (radius)  in  feet  from  the  trunk.   Health  &  Structure  Rating    ‘1’  indicates  no  visible  health-­‐related  problems  or   structural  defects;  ‘2’  indicates  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  alone;  and  ‘3’  indicates   significant  visible  problems  or  defects,  the  tree  is  not  viable  for  retention  and   is  considered  Dangerous  by  City  code.     Visible  Defects  Obvious  structural  defects  or  diseases  visible  at  time  of   inspection,  which  includes:   Branch  dieback  -­‐  Mature  branches  in  canopy  are  dying/dead.   Decay  –  process  of  wood  degradation  by  micro-­‐organisms  resulting  in   weak  and  defective  structure.   Decline  –  Tree  is  in  an  obvious  state  of  declining  vigor/vitality.   Double  leader  –  the  tree  has  multiple  stem  attachments,  which  may   require  maintenance  or  monitoring  over  time.     Tree  leans  –  Trunk  has  significant  lean  from  vertical.   Trunk  decay  -­‐  Wood  decay  is  visible  in  the  trunk.       1 Tree,  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").     2  Tree,  Landmark:  A  tree  with  a  caliper  of  thirty  inches  (30")  or  greater.   3  Tree,  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  certified  arborist. Satwant  Singh   RE:    Arborist  Report  –  Grant  Place  Townhomes,  1600  Grant  Ave  S.,  Renton  WA   December  21,  2015   Page  3  of  6   Greenforest Registered Consulting Arborist   Tree  Inventory.  Tree  No.  DBH  Species  Dripline  Tree   Category  Health  Structure  Visible  Defects/Comments   14  12”  Red  alder  14’  Dangerous  3  3  Double  leader  with  included  bark,   trunk  cracked.   17  12”  Bigleaf  maple  15’  Significant  1  1       24  14"  Red  alder  15'  Dangerous  3  3   Top  of  tree  dead  and  failed,  decay   in  trunk.  Dieback  of  branches   throughout  canopy.   25  14”  Red  alder  12’  Dangerous  2  2   Some  branch  dieback  in  upper   canopy.    Double-­‐trunked  tree   with  #26.    Retain  only  in  a  grove,   not  as  a  stand-­‐alone  tree.   26  14”  Red  alder  12’  Dangerous  2  2   Some  branch  dieback  in  upper   canopy.    Double-­‐trunked  tree   with  #26.    Retain  only  in  a  grove,   not  as  a  stand-­‐alone  tree.   27  14”  Red  alder  12’  Dangerous  3  3  Advanced  trunk  decay.   28  14”  Red  alder  12’  Dangerous  3  3  Lean,  trunk  decay,  top  of  tree   dead/previous  failure.   29  14”  Red  alder  12’  Dangerous  3  3  Tree  top  dead/broken,  trunk   decay.   35  16”  Red  alder  15’  Dangerous  3  3   Top  of  tree  dead  and  failed,  decay   in  trunk.  Dieback  of  branches   throughout  canopy.   40  18”  Red  alder  15’  Dangerous  3  3   Top  of  tree  dead  and  failed,  decay   in  trunk.  Dieback  of  branches   throughout  canopy.   44  20”  Red  alder  16’  Dangerous  3  3  Trunk  decay,  branch  decline.         Satwant  Singh   RE:    Arborist  Report  –  Grant  Place  Townhomes,  1600  Grant  Ave  S.,  Renton  WA   December  21,  2015   Page  4  of  6   Greenforest Registered Consulting Arborist Ten  of  the  eleven  subject  trees  are  not  viable  for  retention  because  of  current  poor  or   declining  health  and/or  high  risk  of  failure  due  to  structural  defects  and  previous   failures.    There  are  no  treatments  that  can  ameliorate  these  problems.       Thank  you  very  much  for  your  business.    Let  me  know  if  you  need  any  additional   information.     Sincerely,       GreenForest,  Inc.       By  Favero  Greenforest,  M.  S.     ISA  Certified  Arborist  #  PN  -­‐0143A     ASCA  Registered  Consulting  Arborist®  #379   ISA  Tree  Risk  Assessment  Qualified     Attachments:     1. Assumptions  &  Limiting  Conditions   2. Annotated  Topographic  Survey         Satwant  Singh   RE:    Arborist  Report  –  Grant  Place  Townhomes,  1600  Grant  Ave  S.,  Renton  WA   December  21,  2015   Page  5  of  6   Greenforest Registered Consulting Arborist Attachment  No.  1  -­‐  Assumptions  &  Limiting  Conditions     1. A  field  examination  of  the  site  was  made  12/16/2015.      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. I  am  not  a  qualified  land  surveyor.    Reasonable  care  was  used  to  match  the  trees   indicated  on  the  sheet  with  those  growing  on  site.     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.     8. 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.         Satwant SinghRE: Arborist Report – Grant Place Townhomes, 1600 Grant Ave S., Renton WA December 21, 2015Page 6 of 6Attachment No. 2 - Annotated Topographic SurveyPROPOSED RETAINED TREES